Query：
学者姓名：张文学
Refining：
Year
Type
Indexed by
Source
Complex
Co-Author
Language
Clean All
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
Cite：
Copy from the list or Export to your reference management。
| 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 等. "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) . |
| Export to | NoteExpress RIS BibTex |
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
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
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
Cite：
Copy from the list or Export to your reference management。
| 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) . |
| Export to | NoteExpress RIS BibTex |
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
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
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
Cite：
Copy from the list or Export to your reference management。
| 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) . |
| Export to | NoteExpress RIS BibTex |
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
Cite：
Copy from the list or Export to your reference management。
| 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) . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
本实用新型公开了拉线式边坡监测预警系统，包括边坡山体和边坡坡体，所述边坡山体上设置有激发组件和预警组件，所述边坡坡体上设置有拉线组件；所述激发组件包括固定连接在所述边坡山体顶端一侧的保护盒，所述保护盒内设置有激发件，所述激发件上设置有引线的一端，所述引线另一端伸出所述保护盒，且通过固定件与所述边坡山体顶端另一侧固定连接，所述拉线组件两端分别与所述引线和所述边坡坡体底端对应设置；所述预警组件与所述激发件电性连接。本实用新型具有技术简单、安全可靠、稳定性好、耐候性好、抗干扰能力强、设备简单可重复使用、施工方便、后期运营简单、成本低、使用寿命长的特点。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 王强 , 陈盈 , 张文学 et al. 拉线式边坡监测预警系统 : CN202320450630.3[P]. | 2023-03-10 . |
| MLA | 王强 et al. "拉线式边坡监测预警系统" : CN202320450630.3. | 2023-03-10 . |
| APA | 王强 , 陈盈 , 张文学 , 刘宇豪 , 覃清玥 , 罗震 . 拉线式边坡监测预警系统 : CN202320450630.3. | 2023-03-10 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
本实用新型公开一种结构倾斜自动监测装置，涉及倾斜自动监测技术领域，包括若干个安装在结构顶板上的调平螺杆，调平螺杆上限位滑动安装有调平板，调平螺杆上设置有调节件，调节件用于调节调平板的水平，调平板的顶端安装有监测机构，监测机构用于判断调平板是否倾斜；本实用新型通过监测机构的设置，可以实现对倾斜的自动监测，避免了因为倾斜而造成的损失；通过调平螺杆和调节件的设置，可以使监测机构在开始监测时便处于水平状态，提高了监测机构的监测精度；本实用新型结构简单，价格较低，减少了生产成本。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 张孟琦 , 刘伟 , 吴晨阳 et al. 一种结构倾斜自动监测装置 : CN202320670509.1[P]. | 2023-03-30 . |
| MLA | 张孟琦 et al. "一种结构倾斜自动监测装置" : CN202320670509.1. | 2023-03-30 . |
| APA | 张孟琦 , 刘伟 , 吴晨阳 , 张海珏 , 张渭 , 张文学 . 一种结构倾斜自动监测装置 : CN202320670509.1. | 2023-03-30 . |
| Export to | NoteExpress RIS BibTex |
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。
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
本实用新型涉及桥梁转体施工技术领域，特别是涉及一种可实现双向转动的平转桥梁牵引索锚固结构，包括上转盘，上转盘周向等间隔设置有若干带孔工字钢，带孔工字钢上可拆卸连接有牵引索的一端，牵引索远离带孔工字钢的一端传动连接有牵拉部，若干牵拉部环绕上转盘设置，牵拉部底部固接有下转盘，下转盘与上转盘转动连接。本实用新型可以无需将牵引索提前锚固或预埋，大大简化工作流程，避免牵引索长时间的外露可能造成牵引索的锈蚀或断裂，同时带孔工字钢与牵引索可拆卸连接，牵引索使用完后可以进行回收，避免材料浪费，大大节约材料，且当施工过程中出现超转的情况，也可对超转部分进行补救。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 王强 , 刘伟 , 张渭 et al. 一种可实现双向转动的平转桥梁牵引索锚固结构 : CN202320634308.6[P]. | 2023-03-28 . |
| MLA | 王强 et al. "一种可实现双向转动的平转桥梁牵引索锚固结构" : CN202320634308.6. | 2023-03-28 . |
| APA | 王强 , 刘伟 , 张渭 , 陈盈 , 张文学 , 冷文波 . 一种可实现双向转动的平转桥梁牵引索锚固结构 : CN202320634308.6. | 2023-03-28 . |
| Export to | NoteExpress RIS BibTex |
Export
| Results： |
Selected to |
| Format： |
