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学者姓名：邓宗才
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Abstract ：
The Textile Reinforced Engineering Cementitious Composite (TRECC) is a cementitious composite material reinforced with short polyvinyl alcohol (PVA) or polyethylene (PE) fibers, possessing exceptional ductility. This unique attribute enhances the utilization of the textile grid's strength and significantly improves the load-bearing and deformation capabilities of ECC members reinforced with textile grids. In this study, the effects of fiber textile grids and steel wire mesh on the tensile properties of ECC were investigated. The test results showed that the carbon textile grid significantly improved the peak strength of specimens. On the other hand, the glass textile grid significantly improved the ultimate strain of specimens. The carbon combined with glass textile grids can integrate effectively the advantages of both carbon and glass textile grids. When compared with single textile grids, the combination uses of steel wire mesh and fiber textile grids resulted in a significant improvement in ultimate strain and post-peak energy absorption values. Finally, based on the test data, this study proposed the peak strength calculation of TRECC and provided the stress-strain expressions of the initial non-linear strain hardening phase and the tensile softening phase and a related analytical model to describe the stress-strain behavior of TRECC.
Keyword ：
Carbon textile grid Carbon textile grid steel wire mesh steel wire mesh ultimate strength ultimate strength engineered cementitious composite (ECC) engineered cementitious composite (ECC) glass textile grid glass textile grid tensile behavior tensile behavior
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| GB/T 7714 | Deng, Zongcai , Xu, Junlin . Uniaxial tensile behavior of engineering cementitious composite reinforced with fiber textile grid and steel wire mesh [J]. | MECHANICS OF ADVANCED MATERIALS AND STRUCTURES , 2024 . |
| MLA | Deng, Zongcai 等. "Uniaxial tensile behavior of engineering cementitious composite reinforced with fiber textile grid and steel wire mesh" . | MECHANICS OF ADVANCED MATERIALS AND STRUCTURES (2024) . |
| APA | Deng, Zongcai , Xu, Junlin . Uniaxial tensile behavior of engineering cementitious composite reinforced with fiber textile grid and steel wire mesh . | MECHANICS OF ADVANCED MATERIALS AND STRUCTURES , 2024 . |
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Abstract ：
With the increasing application of carbon fiber reinforced polymer (CFRP) in steel structure engineering, the bond-slip behavior between the two has attracted much attention. Firstly, 18 sets of CFRP sheet-Q690qD highstrength steel double strap shear specimens were fabricated considering the effects of CFRP sheet thicknesses and bond length. Then, static and fatigue tests were conducted on them. Subsequently, based on the 3D-DIC acquisition technology, the bond-slip curves were obtained using the smoothing method and the fitting method respectively Finally, the three key parameters of tau(max), s(1 )and s(f) in the bifurcated model at each working condition were obtained. The experimental results indicated that the bond length was positively correlated with the static load ultimate strength, while the thickness of the CFRP sheet had less effect on the ultimate strength. The fatigue life of the specimen with a bond length of 40 mm under equal stress ratio fatigue loading was much higher than that of the specimens with bond lengths of 60 mm and 80 mm. It was found that the fitting method had better stability and accuracy in fitting the bond-slip curves of CFRP sheet-Q690qD high-strength steel specimens. The accuracy of the fitting maximum bond load was above 80 %, which can provide a relevant basis for the subsequent numerical simulation calculation.
Keyword ：
Bond-slip Bond-slip Q690 high-strength steel plate Q690 high-strength steel plate Fatigue properties Fatigue properties Fitting method Fitting method 3D-DIC 3D-DIC CFRP sheet CFRP sheet
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| GB/T 7714 | Gao, Li , Deng, Zongcai , Zhuang, Mei-Ling . Experimental study on bond-slip behaviors of CFRP sheet-Q690 high strength steel plate considering the effect of CFRP sheet thickness and bonding length [J]. | STRUCTURES , 2024 , 69 . |
| MLA | Gao, Li 等. "Experimental study on bond-slip behaviors of CFRP sheet-Q690 high strength steel plate considering the effect of CFRP sheet thickness and bonding length" . | STRUCTURES 69 (2024) . |
| APA | Gao, Li , Deng, Zongcai , Zhuang, Mei-Ling . Experimental study on bond-slip behaviors of CFRP sheet-Q690 high strength steel plate considering the effect of CFRP sheet thickness and bonding length . | STRUCTURES , 2024 , 69 . |
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Abstract ：
In this paper, 12 ultra-high performance concrete (UHPC) filled high-strength steel tubular (UHPCFST) short columns with square-section were subjected to axial compression tests. The effects of confinement factor (xi) on the axial compression performance of UHPCFST were discussed, and the failure modes, axial load-strain curves, and strain responses were discussed. The results showed that the specimens mainly had two failure modes: shear failure and waist drum failure, and all specimens showed good ductility and high post-peak bearing capacity, indicating that high-strength steel tubes could provide higher restraint for UHPC and form a high-strength and high-performance steel-UHPC system. When xi >= 1.42, the strength index (SI) increased significantly with the increase of xi. When xi <= 1.06, the SI was close to 1. With the increase of xi, the ductility and toughness of the specimens were improved. Finally, considering the non-uniformity of the confinement of the core UHPC by the square-section steel tube, a calculation model of the ultimate compressive capacity of UHPCFST specimens with square-section was proposed. Compared with the seven classical models, the calculation model proposed in this paper was more accurate.
Keyword ：
Design formula Design formula Steel tubes Steel tubes UHPC UHPC Square -section Square -section Axial compression Axial compression
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| GB/T 7714 | Li, Jiayue , Deng, Zongcai . Performance of square UHPC filled high-strength steel tubular columns under axial compression: Experiment and theory analysis [J]. | STRUCTURES , 2022 , 46 : 1395-1406 . |
| MLA | Li, Jiayue 等. "Performance of square UHPC filled high-strength steel tubular columns under axial compression: Experiment and theory analysis" . | STRUCTURES 46 (2022) : 1395-1406 . |
| APA | Li, Jiayue , Deng, Zongcai . Performance of square UHPC filled high-strength steel tubular columns under axial compression: Experiment and theory analysis . | STRUCTURES , 2022 , 46 , 1395-1406 . |
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Abstract ：
为掌握玻璃纤维网格增强砂浆薄板单轴拉伸力学特性，试验共设计两组玻璃纤维网格增强砂浆薄板的受拉试件，一组采用普通砂浆基体，另外一组采用环氧砂浆基体，两组均含有不同层数的玻璃纤维网格。试验参数为纤维网格层数、砂浆种类及龄期。通过对玻璃纤维网格增强砂浆薄板进行拉伸试验，观察破坏过程和破坏形态，研究试验参数变化对板拉伸力学性能的影响。试验结果表明：玻璃纤维网格可有效提高试件的承载力及变形能力，网格层数为1、2、3、4层的普通砂浆试件的峰值荷载较未配置纤维网格试件分别提高16%、107%、203%和348%,网格层数为1、2、3、4层的环氧砂浆试件的峰值荷载较未配置纤维网格试件分别提高41%、50%、1...
Keyword ：
龄期 龄期 拉伸性能 拉伸性能 复合材料 复合材料 玻璃纤维 玻璃纤维 纤维利用率 纤维利用率
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| GB/T 7714 | 赵洪飞 , 张译文 , 王卫东 et al. 耐碱玻璃纤维网格砂浆板拉伸性能的试验研究 [J]. | 复合材料科学与工程 , 2022 , PageCount-页数: 8 (02) : 99-106 . |
| MLA | 赵洪飞 et al. "耐碱玻璃纤维网格砂浆板拉伸性能的试验研究" . | 复合材料科学与工程 PageCount-页数: 8 . 02 (2022) : 99-106 . |
| APA | 赵洪飞 , 张译文 , 王卫东 , 邓宗才 , 赵洋 , 刘青 et al. 耐碱玻璃纤维网格砂浆板拉伸性能的试验研究 . | 复合材料科学与工程 , 2022 , PageCount-页数: 8 (02) , 99-106 . |
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Abstract ：
In this paper, seven ultra-high performance concrete (UHPC)-filled double skin high-strength steel tubular (UHPCFDST) columns and four UHPC filled high-strength steel tubular (UHPCFST) columns axial compression tests were carried out. The effects of hollow ratio, width-to-thickness ratio of the outer steel tube, and cross-section combination form on the axial compression performance of UHPCFDST were studied, and the failure mode, axial load-strain curve, and strain response were discussed. The results showed that the high-strength steel tube had good compatibility with UHPC, and all specimens finally had serious buckling deformation. The peak load of UHPCFDST specimens decreased with the increase of the hollow ratio, the ductility and toughness were improved. The width-to-thickness ratio of the outer steel tube had the most significant effect on the axial compression performance of the specimens. With the increase of the width-to-thickness of the outer steel tube, the ductility of the specimens tended to increase, and the toughness index first increased and then decreased. Finally, a unified calculation model for the ultimate compressive capacity of UHPCFDST and UHPCFST specimens was proposed, and the predicted value was in good agreement with the experimental value.
Keyword ：
double-skin steel tubes double-skin steel tubes ductility ductility design formula design formula axial compression axial compression UHPC UHPC
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| GB/T 7714 | Li, Jiayue , Deng, Zongcai . Axial compressive behavior of ultra-high performance concrete-filled double skin high-strength steel tubular short columns [J]. | STRUCTURAL CONCRETE , 2022 , 24 (3) : 3857-3876 . |
| MLA | Li, Jiayue et al. "Axial compressive behavior of ultra-high performance concrete-filled double skin high-strength steel tubular short columns" . | STRUCTURAL CONCRETE 24 . 3 (2022) : 3857-3876 . |
| APA | Li, Jiayue , Deng, Zongcai . Axial compressive behavior of ultra-high performance concrete-filled double skin high-strength steel tubular short columns . | STRUCTURAL CONCRETE , 2022 , 24 (3) , 3857-3876 . |
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Abstract ：
Glass fiber-reinforced polymer (GFRP) composites are promising composites often utilized in coastal infrastructure or used as an alternative to steel reinforcement in seawater sea sand concrete due to their excellent corrosion resistance. Understanding the degradation mechanism of GFRP in corrosion environments is significant for improving the long-term performance of GFRP materials. This paper presented the influences of seawater content and temperature on the properties of GFRP composites using the molecular dynamics method. The simulation results were validated by existing experiments on mechanical properties, interlaminar strength, and microstructures of an accelerated aging test of GFRP. The calculation results indicated that when seawater content of the matrix increased from 0% to 9.09% at 298 K, Young's modulus, shear modulus, and bulk modulus decreased 46.72%, 53.46%, and 41.75%, respectively. The binding energy of GFRP composites with seawater content of 2.15% at 353 K was 26.46% lower than that of unconditioned GFRP at 298 K. It revealed that the higher seawater content and temperature accelerated the degradation of the GFRP composites. The investigation provided a comprehensive understanding of the degradation mechanism of GFRP in seawater environments and provided a basis for the durability design of GFRP composites.
Keyword ：
GFRP GFRP molecular dynamics molecular dynamics durability durability seawater seawater degradation degradation
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| GB/T 7714 | Zhang, Xiuli , Deng, Zongcai . Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method [J]. | POLYMERS , 2022 , 14 (14) . |
| MLA | Zhang, Xiuli et al. "Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method" . | POLYMERS 14 . 14 (2022) . |
| APA | Zhang, Xiuli , Deng, Zongcai . Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method . | POLYMERS , 2022 , 14 (14) . |
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Abstract ：
Seventy eight dog-bone shaped ultra-high performance concrete (UHPC) tensile specimens were designed to study the effects of single steel fiber and hybrid steel fiber with polyolefin (PP) fiber, polyvinyl alcohol (PVA) fiber, glass fiber (GF), polyester (PET) fiber, and basalt fiber (BF) on the compressive strength, tensile strength, peak strain, and fracture energy of UHPC. The results showed that hybrid fiber reinforced UHPC had good toughness damage characteristics, which reflected the strengthening and toughening effects of different fibers. The tensile stress-strain curves of hybrid fiber reinforced UHPC could be divided into the rising section and softening section, and the softening section was significantly influenced by the type and volume content of fibers. Among the microfiber (PVA fiber, GF, and BF), GF had the most significant strengthening effect, PVA fiber had the best ability to improve the deformation of UHPC, and BF had the most significant effect on the improvement of fracture energy. Among macrofiber (PP fiber, PET fiber), PP fiber had a better ability to improve UHPC deformation than PET fiber, but both were lower than microfiber. When the total volume content of steel fiber and PVA fiber was 2.5%, the best toughening and crack resistance effect was achieved when the volume content of steel fiber was 1.5% and the volume content of PVA fiber was 1.0%. Combined with the experimental results, the UHPC tensile sigma-omega curves of single steel fibers, hybrid steel-PVA fibers, and hybrid steel-PVA-PET fibers were established, and the predicted curves were in good agreement with the experimental curves.
Keyword ：
fracture energy fracture energy tensile behavior tensile behavior hybrid fibers hybrid fibers UHPC UHPC sigma-omega curves sigma-omega curves
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| GB/T 7714 | Li, Jiayue , Deng, Zongcai . Tensile behavior of ultra-high performance concrete reinforced with different hybrid fibers [J]. | STRUCTURAL CONCRETE , 2022 , 24 (1) : 1415-1435 . |
| MLA | Li, Jiayue et al. "Tensile behavior of ultra-high performance concrete reinforced with different hybrid fibers" . | STRUCTURAL CONCRETE 24 . 1 (2022) : 1415-1435 . |
| APA | Li, Jiayue , Deng, Zongcai . Tensile behavior of ultra-high performance concrete reinforced with different hybrid fibers . | STRUCTURAL CONCRETE , 2022 , 24 (1) , 1415-1435 . |
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Abstract ：
为研究膨胀剂、减缩剂对超高性能混凝土(UHPC)圆环约束收缩性能的影响,开展了掺膨胀剂或减缩剂的UHPC的劈裂抗拉强度、弹性模量及圆环约束收缩试验研究,并对掺膨胀剂或减缩剂的UHPC的开裂风险、松弛性能进行了定量分析.分析结果表明:在本研究的掺量范围内,膨胀剂或减缩剂的掺入均提高了UHPC的7 d劈裂抗拉强度;膨胀剂或减缩剂的掺入均降低了各阶段的钢环应变,(28 d)最大降低幅度分别为30.7％、38.6％;膨胀剂的掺入使UHPC各龄期拉应力水平均降至安全控制值内,其中6％掺量的膨胀剂减缩效果最佳;减缩剂的掺入虽降低了UH-PC的(3 d)拉应力水平,但拉应力水平仍高于安全控制值.
Keyword ：
超高性能混凝土(UHPC) 超高性能混凝土(UHPC) 圆环约束收缩 圆环约束收缩 减缩剂 减缩剂 膨胀剂 膨胀剂
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| GB/T 7714 | 邓宗才 , 赵连志 , 连怡红 . 膨胀剂、减缩剂对超高性能混凝土圆环约束收缩性能的影响 [J]. | 材料导报 , 2021 , 35 (12) : 12070-12074 . |
| MLA | 邓宗才 et al. "膨胀剂、减缩剂对超高性能混凝土圆环约束收缩性能的影响" . | 材料导报 35 . 12 (2021) : 12070-12074 . |
| APA | 邓宗才 , 赵连志 , 连怡红 . 膨胀剂、减缩剂对超高性能混凝土圆环约束收缩性能的影响 . | 材料导报 , 2021 , 35 (12) , 12070-12074 . |
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Abstract ：
Thirty dog bone-shaped specimens were tested to study the effects of steel fiber mixed with seven kinds of non-metallic fibers on the tensile properties of ultra-high-performance concrete (UHPC). Through experiments and micromorphological analysis, the effects of hybrid fibers on the compressive strength, tensile strength, peak strain, fracture energy, and characteristic length of UHPC were analyzed. The results showed that the hybrid fiber-reinforced UHPC showed good ductile failure characteristics, which reflected the good crack resistance and toughening effect of different fibers. The tensile stress-strain curves of UHPC with different hybrid fibers can be divided into two parts: ascending section and softening section, and the softening section was greatly affected by the type and content of fibers. Basalt fiber with a diameter of 0.02 mm had the most obvious strengthening effect on UHPC, and polyvinyl alcohol fiber with a diameter of 0.2 mm and length of 8 mm had the best toughening effect. The mixing of steel fiber and non-metallic fiber cannot only reduce the preparation cost but also improve the fracture energy and toughness of UHPC.
Keyword ：
hybrid fiber hybrid fiber microstructures microstructures ultra-high-performance concrete ultra-high-performance concrete fracture energy fracture energy tensile behavior tensile behavior
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| GB/T 7714 | Li, Jiayue , Deng, Zongcai . Tensile Behavior of Hybrid Fiber-Reinforced Ultra-High-Performance Concrete [J]. | FRONTIERS IN MATERIALS , 2021 , 8 . |
| MLA | Li, Jiayue et al. "Tensile Behavior of Hybrid Fiber-Reinforced Ultra-High-Performance Concrete" . | FRONTIERS IN MATERIALS 8 (2021) . |
| APA | Li, Jiayue , Deng, Zongcai . Tensile Behavior of Hybrid Fiber-Reinforced Ultra-High-Performance Concrete . | FRONTIERS IN MATERIALS , 2021 , 8 . |
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Abstract ：
To study the seismic behavior and influencing factors of reinforced ultra-high performance concrete (UHPC) columns, by taking carbon fiber reinforced polymer (CFRP) sheet winding, steel strength, and shear span ratio as variables, tests were carried out on an ordinary steel reinforced UHPC column, an ordinary steel reinforced UHPC column wound with CFRP sheet, and three high-strength steel reinforced UHPC columns under low frequency cyclic loads. The failure mode, load-displacement curves, ductility, and energy dissipation capacity of the specimens were analyzed. Results show that the ductility and energy dissipation capacity of the reinforced UHPC columns with shear span ratio of 1.5-4.0 were good. Under CFRP sheet winding or large shear span ratio, the failure mode of the specimens changed from shear compression failure to bending shear failure, and the ductility was significantly improved. The bearing capacity and ductility of the specimens were improved by increasing the strength of the longitudinal steel and stirrups of the UHPC columns. The working capacity of the ordinary stirrups was poor after cracking, so it is suggested that the shear members of UHPC should be reinforced with stirrups with yield strength above 600 MPa. Based on the truss-arch model, the calculation formula of shear capacity of reinforced UHPC columns was established by taking account of the tensile contribution of steel fibers and the influences of axial compression ratio and shear span ratio. The calculated values agreed well with the test results, which can provide reference for the design of UHPC structures. Copyright ©2021 Journal of Harbin Institute of Technology.All rights reserved.
Keyword ：
Fiber reinforced concrete Fiber reinforced concrete High strength steel High strength steel Seismic response Seismic response Steel fibers Steel fibers Graphite fibers Graphite fibers Ductility Ductility Arch bridges Arch bridges Ultra-high performance concrete Ultra-high performance concrete Carbon fiber reinforced plastics Carbon fiber reinforced plastics Failure (mechanical) Failure (mechanical) Energy dissipation Energy dissipation Winding Winding Beams and girders Beams and girders Connectors (structural) Connectors (structural)
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| GB/T 7714 | Deng, Zongcai , He, Shaofeng , Yao, Junsuo . Analysis of seismic behavior and influencing factors of reinforced UHPC columns [J]. | Journal of Harbin Institute of Technology , 2021 , 53 (4) : 51-61 . |
| MLA | Deng, Zongcai et al. "Analysis of seismic behavior and influencing factors of reinforced UHPC columns" . | Journal of Harbin Institute of Technology 53 . 4 (2021) : 51-61 . |
| APA | Deng, Zongcai , He, Shaofeng , Yao, Junsuo . Analysis of seismic behavior and influencing factors of reinforced UHPC columns . | Journal of Harbin Institute of Technology , 2021 , 53 (4) , 51-61 . |
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