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学者姓名：刘学春
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Abstract ：
Conventional suspend-dome structures typically employ upper latticed shells with extensive on-site welded components and joints, while the application of H-section steel members remains limited. This approach results in prolonged construction periods, inconsistent weld quality, and significant environmental pollution. To address these issues, a large-span fully assembled high-performance suspend-dome structure with H-section steel members was proposed, along with bolted joints connecting the H-section steel members to hollow spheres. Tests under combined bending and shear loading were conducted to investigate the out-of-plane flexural performance of the proposed joints. The failure modes, load transfer mechanisms, moment-rotation curves, key performance indicators, and patterns of bolt preload and strain variation were obtained. The influence of the geometric parameters of joint components was studied through finite element analysis. The joint design recommendations were proposed. Furthermore, theoretical formulations for the initial flexural stiffness and flexural capacities were proposed, and the accuracy was validated through comparison with test and finite element analysis results.
Keyword ：
Bolted joints connecting H-section steel members to hollow sphere Bolted joints connecting H-section steel members to hollow sphere Large-span fully assembled suspend-dome structures Large-span fully assembled suspend-dome structures H-section steel H-section steel Flexural capacities Flexural capacities Initial flexural stiffness Initial flexural stiffness Q690 high-strength steel Q690 high-strength steel
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| GB/T 7714 | Zhang, Ailin , Jin, Bowen , Liu, Xuechun et al. Mechanical performance of Q690 high-strength steel bolted joints connecting H-section steel members to hollow spheres under bending and shear for suspend-dome structures [J]. | THIN-WALLED STRUCTURES , 2026 , 218 . |
| MLA | Zhang, Ailin et al. "Mechanical performance of Q690 high-strength steel bolted joints connecting H-section steel members to hollow spheres under bending and shear for suspend-dome structures" . | THIN-WALLED STRUCTURES 218 (2026) . |
| APA | Zhang, Ailin , Jin, Bowen , Liu, Xuechun , Chen, Xuesen . Mechanical performance of Q690 high-strength steel bolted joints connecting H-section steel members to hollow spheres under bending and shear for suspend-dome structures . | THIN-WALLED STRUCTURES , 2026 , 218 . |
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Abstract ：
A new thin concrete-encased honeycomb steel composite beam (TCEHSB) was proposed in this study. The lower flange and approximately two-thirds of the web of the honeycomb steel beam are encased with factory prefabricated concrete, which features low longitudinal rebars ratio, unclosed stirrups, and thin concrete cover outside the steel flange. The top surface of concrete can support the profiled steel sheet composite floor. Compared to traditional steel-concrete composite beams, the upper flange and upper web of the honeycomb steel beam are encased by the floor, reducing the total height of the beam and slab to increase the headroom. The interface bond and friction between the steel and concrete floor provide good force transmission effect, forming a reliable composite action under positive bending moments, and enhancing fire resistance and corrosion protection of the steel. Four-point bending tests were carried out on four full-scale TCEHSBs. Combined with finite element analysis, the influence of flange and web thickness, web openings quantity, openings size, openings spacing, openings shape, stirrup diameter, and shear span ratio on the resistance of the composite beams were investigated. Results show that the thin concrete with low longitudinal rebars ratio can prevent local buckling of the steel section, fully utilizing steel's strength. When the shear resistance is sufficient, the influence of size and quantity of openings on the resistance and initial stiffness can be neglected. Considering the influence of different openings shapes, openings sizes and openings spacing on the resistance, the bending and shear resistance formulas of TCEHSB were proposed and validated.
Keyword ：
Shear resistance Shear resistance Floor encased steel beam Floor encased steel beam Honeycomb steel composite beam Honeycomb steel composite beam Prefabricated composite beam Prefabricated composite beam Thin concrete encased steel in factory Thin concrete encased steel in factory Bending resistance Bending resistance
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| GB/T 7714 | Liu, Xue-Chun , Guo, Long-Xin , Chen, Xuesen et al. Mechanical performance of thin concrete-encased honeycomb steel composite beam under positive bending [J]. | STRUCTURES , 2025 , 80 . |
| MLA | Liu, Xue-Chun et al. "Mechanical performance of thin concrete-encased honeycomb steel composite beam under positive bending" . | STRUCTURES 80 (2025) . |
| APA | Liu, Xue-Chun , Guo, Long-Xin , Chen, Xuesen , Cui, Wen-Bin . Mechanical performance of thin concrete-encased honeycomb steel composite beam under positive bending . | STRUCTURES , 2025 , 80 . |
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Abstract ：
A composite encasement of fireproof board and concrete was proposed for the prefabricated cruciform thin concrete encased steel columns, improving the fire resistance of the composite column. The post-fire behaviour of the composite column was first investigated by the experiments. The failure mode, time-temperature responses, load-deformation responses and main performance indexes of the composite column after fire exposure were obtained. Compared with the fireproof coating, the composite encasement has better thermal insulation. The concrete of the fired column falls off more seriously under axial load compared to the non-fired composite column, and its load-bearing performance decrease significantly. Parametric analysis of the composite columns was conduceted based on the validated finite element model. The effects of fireproof board thickness, concrete strength, steel strength, stirrup spacing and steel area ratio on the post-fire resistance and stiffness of the composite column were studied. Increasing the fireproof board thickness or the steel area ratio of the C-FBTCES columns can improve the residual resistance and stiffness after fire exposure. Increasing the stirrup spacing can decrease the post-fire resistance of the composite column, but have no influence on the stiffness. The composite column with high concrete strength is more sensitive to fire exposure than that with low concrete strength. Moreover, a database containing 1153 sets of data including 9 input variables and 2 output variables was established. Based on the established database, the machine learning models were adopted to predict the post-fire resistance and stiffness of the composite column. The random forest, support vector regression, back-propagation artificial neural network and extreme gradient boosting mosels have higher prediction accuracy than the linear regression model, and their coefficient of determination is 0.999. The sectional thickness of column leg has the largest and positive effect on the post-fire stiffness and resistance, and the heating time has a pronounced negative effect on the post-fire stiffness and resistance. © 2025
Keyword ：
Concrete mixtures Concrete mixtures Fireproofing Fireproofing High performance concrete High performance concrete Concrete products Concrete products Polynomial regression Polynomial regression Linear regression Linear regression Support vector regression Support vector regression
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| GB/T 7714 | Meng, Kun , Liu, Xue-chun , Chen, Xuesen et al. Post-fire behaviour of prefabricated cruciform fireproof board and thin concrete encased steel columns: Test, simulation and machine learning-based modelling [J]. | Journal of Building Engineering , 2025 , 108 . |
| MLA | Meng, Kun et al. "Post-fire behaviour of prefabricated cruciform fireproof board and thin concrete encased steel columns: Test, simulation and machine learning-based modelling" . | Journal of Building Engineering 108 (2025) . |
| APA | Meng, Kun , Liu, Xue-chun , Chen, Xuesen , Zhang, Dong-jie , Ren, Yang-zhi , Luo, Xiao et al. Post-fire behaviour of prefabricated cruciform fireproof board and thin concrete encased steel columns: Test, simulation and machine learning-based modelling . | Journal of Building Engineering , 2025 , 108 . |
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Abstract ：
Standard bolt holes are widely used in fully bolted connections. However, in practical applications, standard bolt holes require high manufacturing precision and tight assembly tolerances, leading to installation difficulties. To address this issue, a slidable bolted truss-to-column (SBTC) joint was proposed for a modularized multi-story and high-rise steel structure, utilizing oversized or slotted bolt holes to improve assembly accuracy and reduce installation errors. Eight specimens were designed to investigate the effects of bolt-hole shape and size on joint performance. Four specimens were selected for static testing to validate the finite element model. The influence of bolt-hole shape and size on failure mode, main performances, and bolt force loss was analyzed. Additionally, the performance of SBTC joints was compared with two welded joint specimens. The results indicate that bolt-hole shape and size have a minimal effect on initial stiffness, slip initiation rotation angle, slip bending moment, yield bending moment, and peak bending moment. Compared to SBTC joints with standard bolt holes and welded joints, SBTC joints with oversized and slotted bolt holes exhibit performance reductions within an acceptable range for engineering applications. Moreover, recommended dimensions for oversized and slotted bolt holes were provided. The bolt-hole coefficient for SBTC joints was obtained by extracting friction forces in the bolted splice zone. A theoretical method for predicting initial stiffness and load-carrying capacity was proposed based on the analysis result. Additionally, a simplified moment-rotation curve model was developed for the bolted splice zone, which can be used for structural system analysis.
Keyword ：
Simplified moment-rotation curve model Simplified moment-rotation curve model Slidable bolted truss-to-column joint Slidable bolted truss-to-column joint Oversized bolt holes Oversized bolt holes Modularized steel structures Modularized steel structures Bolt-hole coefficient Bolt-hole coefficient Slotted bolt holes Slotted bolt holes Static test Static test
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| GB/T 7714 | Jin, Bowen , Zhang, Ailin , Liu, Xuechun et al. Mechanical behavior of slidable bolted truss-to-column joints with oversized or slotted bolt holes for modularized steel structures [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 111 . |
| MLA | Jin, Bowen et al. "Mechanical behavior of slidable bolted truss-to-column joints with oversized or slotted bolt holes for modularized steel structures" . | JOURNAL OF BUILDING ENGINEERING 111 (2025) . |
| APA | Jin, Bowen , Zhang, Ailin , Liu, Xuechun , Chen, Xuesen , Feng, Xu-Ze , Li, Chuanhao . Mechanical behavior of slidable bolted truss-to-column joints with oversized or slotted bolt holes for modularized steel structures . | JOURNAL OF BUILDING ENGINEERING , 2025 , 111 . |
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Abstract ：
A novel bolted beam-to-column joint with reinforced concrete slab was proposed and tested under cyclic loads to investigate the seismic performance and post-earthquake maintainability. The proposed beam-to-column joint can be rapidly assembled using high-strength bolts, flange plates, clamp plates, and splice plates to connect the upper column, lower column, and steel beam. Additionally, a gap was intentionally left between the slab and column at this joint to minimize potential damage to the slab. The influence of the gap between the slab and column, the size of the bolt holes, the quantity of bolts and studs, and the layout of the increasing rebars on the seismic performance of the joint was investigated by test and finite element analysis. The failure modes, load-displacement hysteretic curves, skeleton curves, energy dissipation capacity, stiffness degradation and ductility of the proposed joints were obtained, as well as the bolt tension, beam section stress and bolt slip distance. Additionally, the joint was compared with a joint without slab and a conventional welded beam-to-column joint with reinforced concrete slab. The results showed that the proposed joint can develop good seismic performance, and can dissipate energy by bolt connection slip in the earthquake. The proposed joint was repair-free under large earthquakes because the crack width remained below 0.3 mm and no yielding of steel occurred when the inter-story drift angle was less than 0.02 rad. Approximately 28 % of the total energy dissipation was attributed to bolt connection slippage, which was significantly higher than that observed in traditional joints. Removing the studs in the plastic hinge area on the upper flange decreased the constraint of the slab on the beam, thus lessening the damage of the slab. The proposed joint could effectively increase the ductility and inter-story drift angle of the slab cracking, while also prevent brittle failure of the lower flange. Simplified calculation formulas for the slipping bending moment and ultimate bending moment of the joint were proposed and validated against the tests and finite element analysis.
Keyword ：
Slipping energy dissipation Slipping energy dissipation Seismic performance Seismic performance Repair-free joint Repair-free joint Steel structure Steel structure Steel joint with slab Steel joint with slab Bolted beam-to-column joint Bolted beam-to-column joint Extruded plate Extruded plate
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| GB/T 7714 | Liu, Xue-Chun , Cui, Wen-Bin , Chen, Xuesen et al. Seismic performance of a post-earthquake repair-free bolted beam-to-column joint with slab [J]. | ENGINEERING STRUCTURES , 2025 , 337 . |
| MLA | Liu, Xue-Chun et al. "Seismic performance of a post-earthquake repair-free bolted beam-to-column joint with slab" . | ENGINEERING STRUCTURES 337 (2025) . |
| APA | Liu, Xue-Chun , Cui, Wen-Bin , Chen, Xuesen , Guo, Long-Xin . Seismic performance of a post-earthquake repair-free bolted beam-to-column joint with slab . | ENGINEERING STRUCTURES , 2025 , 337 . |
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Abstract ：
To enhance assembly efficiency, a new bolted beam-to-column composite joint with integrated precast edge composite hollow floor slab (BJHS) was proposed and its seismic performance tested were performed under column-end cyclic loading. Through test and finite element analysis (FEA), the failure mode, hysteretic curve, energy dissipation capacity, stiffness degradation and ductility of the joints were obtained, along with the bolt tension and slippage. Furthermore, BJHS was compared with traditional welded joints without floor slab and bolted beam-to-column composite joint with solid floor slab. The results indicated that the joint effectively dissipates seismic energy through bolt connection slip firstly, which prevents the premature plastic deformation in both the steel beam and the cantilever beam, thereby enhancing ductility and energy dissipation capacity. Increasing the thickness of the lower flange of the cantilever beam can avoid premature steel plate elongation or fracture at the bolt hole and improve the ductility and ultimate load-carrying capacity of the joint. Compared with the joint without slab, the BJHS had higher lateral initial stiffness and ultimate load-carrying capacity, but the damage of floor slab was aggravated after bolt connection slipping and the ductility was poor. Simplified calculation formulas for the slipping bending moment, yielding bending moment and ultimate moment of the joints without slab and with slab were proposed, which match well with test and FEA results. The influence of the floor slab should be considered in the subsequent structural design, and the problem of early cracking of cast-in-place concrete at the floor slab edge should be paid attention to.
Keyword ：
Bolted connection slip Bolted connection slip Slipping energy dissipation Slipping energy dissipation Interior and exterior joints Interior and exterior joints Bolted beam-to-column joint Bolted beam-to-column joint Integrated precast edge composite hollow floor slab Integrated precast edge composite hollow floor slab Seismic performance Seismic performance
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| GB/T 7714 | Cui, Wen-Bin , Liu, Xue-Chun , Chen, Xuesen et al. Seismic performance of bolted beam-to-column composite joints with integrated precast edge composite hollow floor slab [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 . |
| MLA | Cui, Wen-Bin et al. "Seismic performance of bolted beam-to-column composite joints with integrated precast edge composite hollow floor slab" . | JOURNAL OF BUILDING ENGINEERING 105 (2025) . |
| APA | Cui, Wen-Bin , Liu, Xue-Chun , Chen, Xuesen , Guo, Long-Xin . Seismic performance of bolted beam-to-column composite joints with integrated precast edge composite hollow floor slab . | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 . |
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Abstract ：
This paper aimed to study the axial compressive performances of T-section fireproof board and thin concrete encased steel (T-FBTCES) columns after fire exposure. Five composite column specimens and two pure steel column specimens were tested to analyze the failure mode, the temperature distribution, the load-displacement curve and the compressive resistance and stiffness of T-FBTCES columns. Finite element (FE) models were then established and validated against experimental results. According to the validated FE model, the effects of the thickness of fireproof board, skeleton steel ratio, stirrup spacing, heating time, and concrete strength on the axial resistance and stiffness of T-FBTCES columns after fire exposure were discussed. Based on the experimental and numerical study results, the proposed fireproof board and thin concrete encasement can significantly increase the post-fire resistance and stiffness of the composite columns than barely fireproof coating protected steel short columns. Increasing the fireproof board thickness or the skeleton steel ratio of the composite columns can improve the residual resistance and stiffness after fire exposure. When the heating time is less than 60 min and the thickness of the fireproof board is more than 15 mm, the resistance does not decrease after fire exposure. When the skeleton steel ratio of the composite column with 20 mm thick fireproof board increases from 5.83 % to 9.99 %, the post-fire resistance of the composite columns suffered 180 minutes fire time increases by 40.49 %. The resistance and stiffness of the columns using high-grade concrete have a more loss than that using low-grade concrete. Decreasing the stirrup spacing can improve the residual resistance of the composite column after fire exposure, but has little effect on the residual stiffness. The simplified calculation formulas were proposed to predict the residual resistance and stiffness of the T-FBTCES columns after fire exposure.
Keyword ：
Steel-concrete composite column Steel-concrete composite column Temperature distribution Temperature distribution Fireproof board and concrete encased steel Fireproof board and concrete encased steel Residual resistance and stiffness Residual resistance and stiffness T-section column T-section column
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| GB/T 7714 | Meng, Kun , Liu, Xue-chun , Chen, Xuesen et al. Axial compressive performances of prefabricated T-section fireproof board and thin concrete encased steel columns after fire exposure [J]. | STRUCTURES , 2025 , 76 . |
| MLA | Meng, Kun et al. "Axial compressive performances of prefabricated T-section fireproof board and thin concrete encased steel columns after fire exposure" . | STRUCTURES 76 (2025) . |
| APA | Meng, Kun , Liu, Xue-chun , Chen, Xuesen , Zhang, Dong-jie , Ren, Yang-zhi , Guo, Longxin . Axial compressive performances of prefabricated T-section fireproof board and thin concrete encased steel columns after fire exposure . | STRUCTURES , 2025 , 76 . |
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Abstract ：
A novel welded hollow spherical bolted joint with H-beams (WHSH bolted joint) in fully assembled long-span spatial steel structures is proposed. The WHSH bolted joint chords are made of H-beams for easy bolting, rapid assembly, and low manufacturing energy consumption. Static tests are conducted on the WHSH bolted joints under bending moment, bending with constant axial compression, and bending with constant axial tension. Also, the effects of hollow hemisphere thickness, Z-shaped cantilever end flange and web thickness, bolt size and quantity, axial compression ratio, and axial tension ratio on the failure mode, resistance, and ductility of the WHSH bolted joints are studied by finite element analyses. The research shows that the WHSH bolted joints exhibit adequate rotation capacity and ductility, and that the plastic hinges may be far away from the splicing region. The WHSH bolted joints meet the design requirements of 'strong connection and weak member'. Finally, simplified formulas for the slipping, yield, and ultimate resistance of the WHSH bolted joints under bending moment, as well as the yield and ultimate resistance under bending with constant axial force, are proposed and validated. © 2025
Keyword ：
Welded steel structures Welded steel structures Bending (forming) Bending (forming) Steel analysis Steel analysis
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| GB/T 7714 | Zhang, Ai-Lin , Li, Chuan-Hao , Liu, Xue Chun et al. Static performance of welded hollow spherical bolted joint with H-beams [J]. | Structures , 2025 , 76 . |
| MLA | Zhang, Ai-Lin et al. "Static performance of welded hollow spherical bolted joint with H-beams" . | Structures 76 (2025) . |
| APA | Zhang, Ai-Lin , Li, Chuan-Hao , Liu, Xue Chun , Chen, Xuesen . Static performance of welded hollow spherical bolted joint with H-beams . | Structures , 2025 , 76 . |
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Abstract ：
A T-section thin concrete encased steel (T-TCES) column is proposed for the residual buildings, avoiding the convex corners in rooms. The required concrete cover thickness for concrete encased steel members specified in the existing codes is quite large, which is the key problem and to be solved in the proposed column by reducing the concrete covers, facilitating the transportation and installation. To evaluate the mechanical performances of the proposed columns, especially the local stability of the internal T-section steel with the obviously reduced concrete covers, tests of nine short column specimens were conducted under axial monotonic loading. Also, the finite element (FE) analysis was conducted and validated. The effect of the proportion of steel sectional area, concrete strength, stirrup spacing and the concrete encasement thickness outside the flange on the failure modes, load-displacement responses, load-strain responses and characteristic loads were obtained. According to the test and FE analysis results, the peak load can be improve by increasing concrete strength or the proportion of steel sectional area or decreasing the stirrup spacing. The T-TCES columns with low-grade concrete or small stirrup spacing or high proportion of steel sectional area have a better composite action between the internal steel and concrete. Increasing the thickness of the concrete encasement outside the flange can prevent the T-TCES column from cracking. The concrete encasement and reinforcement bars can restrain the internal steel buckling, and improve the steel strength of the composite column compared with the steel column. The calculation methods for the peak and design resistances of the T-TCES column were proposed and proved to show satisfactory accuracy. The simplified model of the load- displacement responses and the calculation methods of the axial stiffness are proposed and validated against the test results.
Keyword ：
Axial compression resistance Axial compression resistance Confined concrete Confined concrete Axial stiffness Axial stiffness T-section column T-section column Concrete encased steel Concrete encased steel
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| GB/T 7714 | Meng, Kun , Chen, Xuesen , Liu, Xue Chun et al. Axial compression behavior of prefabricated T-section thin concrete encased steel short columns [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 82 . |
| MLA | Meng, Kun et al. "Axial compression behavior of prefabricated T-section thin concrete encased steel short columns" . | JOURNAL OF BUILDING ENGINEERING 82 (2024) . |
| APA | Meng, Kun , Chen, Xuesen , Liu, Xue Chun , Zhang, Dong Jie , Zhang, Ai Lin , Ren, Yang Zhi et al. Axial compression behavior of prefabricated T-section thin concrete encased steel short columns . | JOURNAL OF BUILDING ENGINEERING , 2024 , 82 . |
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Abstract ：
本公开涉及一种装配式剪力墙体系及施工方法，该装配式剪力墙体系包括预制的剪力墙本体、预制的楼板、梁构件；剪力墙本体包括预制的剪力外墙和预制的剪力内墙，剪力外墙的至少一端一体预制成型有折弯拐角，剪力外墙和剪力内墙连接并围合形成装配空间，剪力外墙内具有保温层；梁构件、楼板均设置在装配空间内，梁构件的两端分别与装配空间的内壁连接，装配空间的内壁上设置有位于梁构件上方的支撑结构，楼板位于支撑结构上并与梁构件连接。这样将预制好的剪力外墙、剪力内墙、楼板运输至现场即可快速组装，与现有技术中在施工现场制作相比，本公开的装配式剪力墙体系在现场施工的施工进度和施工效率较高，现场环境污染较小。
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| GB/T 7714 | 刘学春 , 王晶 , 柴成源 et al. 装配式剪力墙体系及施工方法 : CN202310238779.X[P]. | 2023-03-14 . |
| MLA | 刘学春 et al. "装配式剪力墙体系及施工方法" : CN202310238779.X. | 2023-03-14 . |
| APA | 刘学春 , 王晶 , 柴成源 , 吕宝华 , 陈学森 . 装配式剪力墙体系及施工方法 : CN202310238779.X. | 2023-03-14 . |
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