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学者姓名：张文学
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Abstract ：
This paper investigates the influence of secondary vibration and the time interval of secondary vibration on the shrinkage properties of freshly placed concrete. In this study, four sets of cylindrical specimens with a diameter of 30 cm and a height of 100 cm were designed with different time intervals for secondary vibration. By continuously monitoring the shrinkage strain of concrete for 17 weeks, a calculation model for the early-age shrinkage strain of concrete considering the effects of secondary vibration was proposed. Concrete compressive strength tests and water expansion tests were also designed to investigate the effects of secondary vibration on compressive strength, compactness and other properties under different environments. The study results showed that secondary vibration mainly reduced concrete shrinkage during the first three days, with a reduction ratio of 10%-20%, and then stabilized. The longer the time interval for vibration, the smaller the shrinkage strain of concrete, and the more significant the improvement in compressive strength and compactness, with an increased ratio of 15%-30%. The proposed prediction model can consider the effects of secondary vibration and reflect the early-age shrinkage variation of concrete during the first seven days. After the cast concrete undergoes water absorption and expansion, it can shrink again under natural air-drying conditions, and the shrinkage rate is not affected by the time interval of secondary vibration.
Keyword ：
Prediction model Prediction model Compactness Compactness Compressive strength Compressive strength Early -age shrinkage Early -age shrinkage Secondary vibration Secondary vibration
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| GB/T 7714 | Chen, Fukun , Xu, Le , Zhang, Wenxue et al. Experimental study of secondary vibration on improving the early-age shrinkage properties of concrete [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 435 . |
| MLA | Chen, Fukun et al. "Experimental study of secondary vibration on improving the early-age shrinkage properties of concrete" . | CONSTRUCTION AND BUILDING MATERIALS 435 (2024) . |
| APA | Chen, Fukun , Xu, Le , Zhang, Wenxue , Lu, Xiangtao . Experimental study of secondary vibration on improving the early-age shrinkage properties of concrete . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 435 . |
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Abstract ：
This paper proposed a novel demountable fabricated joint in frame, which is connected by the prestressed and mortise-tenon connection. The prefabricated components of the demountable structures are designed to be reused, and the joint presented in this paper will promote the sustainable application of prefabricated components in future. The damage process and damage pattern of the internal joints under the horizontal load were analyzed using the refined numerical analysis model based on ABAQUS 6.14. Parametric analyses were conducted simultaneously for five parameters: axial compression ratio, the area and effective initial stress of unbonded prestressed strands (UPSs), the local reinforcement ratio in the core zone of the demountable joint, and the friction coefficient between the interface of concrete. The results showed that the demountable joint exhibits excellent energy dissipation potential under horizontal loads, but the damage was concentrated in the core zone. The deformation of the joint mainly consisted of the self-deformation of the prefabricated components, including bending, bearing and shear, as well as the relative slip deformation between the prefabricated components. The axial compression ratio has a more significant effect on the hysteresis performance compared to the areas of the UPSs and the reinforcement ratio. The initial effective stress of the UPS and the friction coefficient have relatively minor influence on the hysteretic performance of the joint. Finally, this paper recommends the design parameter values (axial compression ratio should not exceed 0.4, area of unbonded prestressed reinforcement should be not lower than Asn=0.02 and not higher than Asn=0.1, the initial stress of the UPS takes the value of 0.75fpu) and outlines optimization measures.
Keyword ：
seismic performance seismic performance demountable precast structure demountable precast structure joint core zone joint core zone mortise-tenon connection mortise-tenon connection sustainable connection sustainable connection
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| GB/T 7714 | Wang, Junwei , Zhang, Cheng , Zhang, Wenxue . Seismic Performance Analysis of the Internal Joint in the New Demountable Fabricated Concrete Frame with Prestressed Mortise-Tenon Connections [J]. | SUSTAINABILITY , 2024 , 16 (18) . |
| MLA | Wang, Junwei et al. "Seismic Performance Analysis of the Internal Joint in the New Demountable Fabricated Concrete Frame with Prestressed Mortise-Tenon Connections" . | SUSTAINABILITY 16 . 18 (2024) . |
| APA | Wang, Junwei , Zhang, Cheng , Zhang, Wenxue . Seismic Performance Analysis of the Internal Joint in the New Demountable Fabricated Concrete Frame with Prestressed Mortise-Tenon Connections . | SUSTAINABILITY , 2024 , 16 (18) . |
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Abstract ：
A self-centering isolated pier (SIP) with an elliptical rocking interface is proposed to enhance the seismic performance of bridge piers. Pseudostatic tests were conducted on two SIPs (one with and the other without tie bars) to study their damage patterns and hysteretic characteristics. Additionally, a finite-element model of a SIP was constructed to study the effect of SIP parameters on its hysteretic characteristics, such as the long radius of the ellipse, the ratio of the long to the short radii of the ellipse, the distance from the tie bar to the centerline of the pier, and the axial compression ratio. The results indicated that the pier bodies of the two SIPs are in the elastic stage. Increasing the long radius of the ellipse and axial compression ratio can enhance the hysteretic characteristics of the SIP. However, these larger values could lead to yield failure of the pier bottom. Furthermore, an increase in the ratio of the long to the short radii of the ellipse results in a progressively less plump hysteretic curve for the SIP, leading to a reduction in energy dissipation capacity. Nevertheless, an increase in this ratio can improve the self-centering ability of SIPs. The distance from the tie bar to the centerline of the pier has little effect on hysteretic characteristics of the SIP.
Keyword ：
Self-centering isolated pier Self-centering isolated pier Seismic performance Seismic performance Pseudostatic test Pseudostatic test Finite-element analysis Finite-element analysis
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| GB/T 7714 | Fang, Rong , Zhang, Wenxue , Zhang, Guowei et al. Experimental and Numerical Study on the Seismic Performance of Self-Centering Isolated Piers [J]. | JOURNAL OF BRIDGE ENGINEERING , 2024 , 29 (10) . |
| MLA | Fang, Rong et al. "Experimental and Numerical Study on the Seismic Performance of Self-Centering Isolated Piers" . | JOURNAL OF BRIDGE ENGINEERING 29 . 10 (2024) . |
| APA | Fang, Rong , Zhang, Wenxue , Zhang, Guowei , Jiao, Chiyu . Experimental and Numerical Study on the Seismic Performance of Self-Centering Isolated Piers . | JOURNAL OF BRIDGE ENGINEERING , 2024 , 29 (10) . |
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Abstract ：
This paper introduces a novel type of connection that integrates unbonded prestressed strands (UPS) and mortise-tenon in an assembly frame structure (UPS-MTF). First, the damage process and failure modes of the joints under reciprocating horizontal loads were systematically analyzed using refined numerical models. The recommended values of the design parameters of the joints were derived from the parametric analysis results. Refined numerical modeling results reveal the diagonal compression strut mechanism within the core region of the joint. The diagonal compression struts model assists in establishing the theoretical calculation formula for the skeleton curve of shear stress-strain in the core region. Second, a genetic algorithm (GA) parameter was identified for the restoring force model of the core region to determine the parameters of the hysteresis rules. Finally, a macro-simplified analytical model of the joint was created based on the restoring force model of the core region, and parameter analysis was conducted to verify the applicability of this macro-simplified analytical model. The research results prove that the damaged form of the joint proposed in this paper originates from the shear and relative slip damage between the components in the core region. The axial compression ratio significantly affects the hysteretic performance of the joints, and the upper and lower limit values were identified for the axial compression ratio of the joints. The area and initial effective stress of the UPS exert a minimal effect on the hysteretic performance of the joint. Based on the method proposed in this paper for determining the restoring force model in the core region of the joints, the hysteresis curves obtained from the macro-simplified analytical model closely match the refined numerical analysis model results. This correspondence verifies the applicability of the macro-simplified analytical model.
Keyword ：
mortise-tenon connection mortise-tenon connection unbonded prestressed strands connection unbonded prestressed strands connection macro-simplified analytical model macro-simplified analytical model diagonal compression struts diagonal compression struts assembled frame structures assembled frame structures
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| GB/T 7714 | Wang, Junwei , Zhang, Wenxue , Zhang, Cheng . The Cyclic Performance and Macro-Simplified Analytical Model of Internal Joints in RC-Assembled Frame Structures Connected by Unbonded Prestressed Strands and Mortise-Tenon Based on Numerical Studies [J]. | BUILDINGS , 2024 , 14 (6) . |
| MLA | Wang, Junwei et al. "The Cyclic Performance and Macro-Simplified Analytical Model of Internal Joints in RC-Assembled Frame Structures Connected by Unbonded Prestressed Strands and Mortise-Tenon Based on Numerical Studies" . | BUILDINGS 14 . 6 (2024) . |
| APA | Wang, Junwei , Zhang, Wenxue , Zhang, Cheng . The Cyclic Performance and Macro-Simplified Analytical Model of Internal Joints in RC-Assembled Frame Structures Connected by Unbonded Prestressed Strands and Mortise-Tenon Based on Numerical Studies . | BUILDINGS , 2024 , 14 (6) . |
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Abstract ：
While the current seismic fortification standards for cable-stayed bridges have been established, determining the return periods and fortification objectives remains insufficient. This study introduces a multi-level seismic fortification objective for cable-stayed bridges with safe-belt devices. The safe-belt device protects the primary components and enables transfers to the restraint system based on varying seismic requirements. For this investigation, a double-tower cable-stayed bridge was chosen as the case study. Three finite element models with varying structural configurations were developed. Subsequently, an elastoplastic time-history analysis was performed under four levels of seismic excitation across different site categories. The results indicate that the primary structures of traditional cable-stayed bridges, specifically the towers and lower crossbeams, are vulnerable to severe damage during extremely rare earthquakes. Incorporating safe-belt devices in a doubletower cable-stayed bridge effectively reduces the internal forces exerted on the primary structures by utilizing the combined action of the dual towers, thereby preventing severe damage. Additionally, these devices allow for controlled girder-end displacement until their capacity is reached. This double-tower cable-stayed bridge successfully meets the multi-level seismic fortification objectives and satisfies the performance requirements at each level.
Keyword ：
Safe-belt devices Safe-belt devices Cable-stayed bridges Cable-stayed bridges E2: floating system E2: floating system Non-linear time-history analysis Non-linear time-history analysis Resilience Resilience Multi-level seismic fortification Multi-level seismic fortification
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| GB/T 7714 | Liu, Yuhao , Zhang, Wenxue , Chen, Ying et al. Multi-level fortification strategies for double-tower cable-stayed bridges with safe-belt devices [J]. | STRUCTURES , 2024 , 67 . |
| MLA | Liu, Yuhao et al. "Multi-level fortification strategies for double-tower cable-stayed bridges with safe-belt devices" . | STRUCTURES 67 (2024) . |
| APA | Liu, Yuhao , Zhang, Wenxue , Chen, Ying , Du, Xiuli . Multi-level fortification strategies for double-tower cable-stayed bridges with safe-belt devices . | STRUCTURES , 2024 , 67 . |
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Abstract ：
Concrete structures such as bridge decks and road pavements are subjected to repetitive loading and are susceptible to fatigue failure. A simplified stress-strain analysis method that can simulate concrete behavior with a sound physical basis, acceptable prediction precision, and reasonable computation cost is urgently needed to address the critical issue of high-cycle fatigue in structural engineering. An equivalent fatigue constitutive model at discrete loading cycles incorporated into the concrete damaged plasticity model (CDPM) in Abaqus is proposed based on fatigue damage evolution. A damage variable is constructed from maximum fatigue strains, and fatigue damage evolution is described by a general equation whose parameters' physical meaning and value range are identified. With the descending branch of the monotonic stress-strain curve as the envelope of fatigue residual strength and fatigue damage evolution equation as shape function, fatigue residual strength, residual stiffness, and residual strain are calculated. The equivalent fatigue constitutive model is validated through comparison with experimental data, where satisfactory simulation results were obtained for axial compression and flexural tension fatigue. The model's novelty lies in integrating the fatigue damage evolution equation with CDPM, explicitly explaining performance degradation caused by fatigue damage. The proposed model could accommodate various forms of concrete constitution and fatigue stress states and has a broad application prospect for fatigue analysis of concrete structures.
Keyword ：
numerical simulation numerical simulation concrete damaged plasticity model concrete damaged plasticity model fatigue damage evolution fatigue damage evolution high-cycle fatigue high-cycle fatigue simplified analysis simplified analysis
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| GB/T 7714 | Chen, Huating , Sun, Zhenyu , Zhang, Xianwei et al. Equivalent Fatigue Constitutive Model Based on Fatigue Damage Evolution of Concrete [J]. | APPLIED SCIENCES-BASEL , 2024 , 14 (19) . |
| MLA | Chen, Huating et al. "Equivalent Fatigue Constitutive Model Based on Fatigue Damage Evolution of Concrete" . | APPLIED SCIENCES-BASEL 14 . 19 (2024) . |
| APA | Chen, Huating , Sun, Zhenyu , Zhang, Xianwei , Zhang, Wenxue . Equivalent Fatigue Constitutive Model Based on Fatigue Damage Evolution of Concrete . | APPLIED SCIENCES-BASEL , 2024 , 14 (19) . |
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Abstract ：
本实用新型公开单箱双室连续梁桥用自锚悬索体系加固主缆箱内锚固结构，包括主塔，主塔设置在连续梁桥中间位置，主塔顶部固接有主索鞍；缆绳部，缆绳部包括主缆，主缆为多股分缆缠绕结构，主缆贯穿主索鞍，主缆的两端分别延伸至连续梁桥顶面两侧且贯穿有两散索鞍，散索鞍将主缆的一端分为多股分缆；连通部，两连通部分别设置在散索鞍远离主塔的一侧，连通部连通桥面顶部和单箱双室连续梁桥的箱室内；固定部，分缆贯穿连通部且与固定部固接。本实用新型可实现连续梁桥变体系加固为自锚悬索桥的过程中主缆、连续梁桥本体协同受力，以形成自锚体系，使原结构承载力提升，裂缝不再扩张，提高桥梁的安全性，适用性和耐久性。
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| GB/T 7714 | 罗锦鸿 , 张文学 , 吴晨阳 et al. 单箱双室连续梁桥用自锚悬索体系加固主缆箱内锚固结构 : CN202320450655.3[P]. | 2023-03-10 . |
| MLA | 罗锦鸿 et al. "单箱双室连续梁桥用自锚悬索体系加固主缆箱内锚固结构" : CN202320450655.3. | 2023-03-10 . |
| APA | 罗锦鸿 , 张文学 , 吴晨阳 , 代天宇 , 王强 , 贡佳豪 et al. 单箱双室连续梁桥用自锚悬索体系加固主缆箱内锚固结构 : CN202320450655.3. | 2023-03-10 . |
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Abstract ：
本实用新型公开一种跨线桥梁架设装置，包括：支撑定位系统和转体动力系统，支撑定位系统包括钢管桩、滑轨和转动定位件，滑轨设置有若干个，若干滑轨均为弧形结构，若干滑轨距转动定位件由远至近依次设置，滑轨底端固接有若干钢管桩，钢管桩底端固接在地面；转动定位件位于桥墩和主梁之间，转动定位件作为转动中心，主梁通过转动定位件与桥墩转动连接；转体动力系统包括卷扬机和连接件，若干滑轨端部均固接有卷扬机，主梁底端固接有若干连接件，若干连接件末端分别与若干卷扬机连接。本实用新型适用于小角度跨线桥梁的架设，避免了转体T构合龙困难及跨度过大导致主梁应力过大而破坏的问题。
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| GB/T 7714 | 罗锦鸿 , 徐步齐 , 鞠晨星 et al. 一种跨线桥梁架设装置 : CN202320770189.7[P]. | 2023-04-10 . |
| MLA | 罗锦鸿 et al. "一种跨线桥梁架设装置" : CN202320770189.7. | 2023-04-10 . |
| APA | 罗锦鸿 , 徐步齐 , 鞠晨星 , 张文学 , 冯斌 . 一种跨线桥梁架设装置 : CN202320770189.7. | 2023-04-10 . |
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Abstract ：
本实用新型公开了一种基于测试转体桥无称重配重技术的应变装置，包括转体装置本体和安装在所述转体装置本体上的桥墩，所述桥墩顶端固定连接有桥体，所述桥墩和所述桥体内均设置有若干应变组件；所述应变组件包括两带肋钢板，两所述带肋钢板平行设置，所述桥墩和所述桥体内均设置有混凝土层，两所述带肋钢板分别固定连接在所述混凝土层内，两所述带肋钢板之间设置有测量组件和限位组件，所述测量组件和所述限位组件分别与所述带肋钢板对应设置，所述测量组件与外界电脑端电性连接。本实用新型施工简便、工期短、绿色环保、理论可靠、实用性强，可实现长距离传输和分布式监测，具有抗腐蚀性强、抗干扰、空间分辨率高、可长期测量等特点。
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| GB/T 7714 | 冷文波 , 廖丰 , 李鹏 et al. 一种基于测试转体桥无称重配重技术的应变装置 : CN202320921510.7[P]. | 2023-04-23 . |
| MLA | 冷文波 et al. "一种基于测试转体桥无称重配重技术的应变装置" : CN202320921510.7. | 2023-04-23 . |
| APA | 冷文波 , 廖丰 , 李鹏 , 张文学 , 江世明 , 谭嘉洲 et al. 一种基于测试转体桥无称重配重技术的应变装置 : CN202320921510.7. | 2023-04-23 . |
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Abstract ：
本实用新型属桥梁灾害防治技术领域，特别是涉及一种集桥梁桩基和抗滑桩于一体的桥梁基础结构，包括抗滑桩外壳，抗滑桩外壳的顶端设置有桥梁组件，桥梁组件伸入抗滑桩外壳内，桥梁组件与抗滑桩外壳之间设置有隔震支座。本实用新型的抗滑桩外壳改变了传统的抗滑桩与桥梁桩基分离设置的方式，将抗滑桩以及桥梁桩基浇筑为一体，达到减少桥梁桩基的损坏，提高桥梁桩基的使用寿命的目的。
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| GB/T 7714 | 王强 , 陈浩 , 冉隆飞 et al. 一种集桥梁桩基和抗滑桩于一体的桥梁基础结构 : CN202320638363.2[P]. | 2023-03-28 . |
| MLA | 王强 et al. "一种集桥梁桩基和抗滑桩于一体的桥梁基础结构" : CN202320638363.2. | 2023-03-28 . |
| APA | 王强 , 陈浩 , 冉隆飞 , 陈盈 , 张文学 . 一种集桥梁桩基和抗滑桩于一体的桥梁基础结构 : CN202320638363.2. | 2023-03-28 . |
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