Pushover test study of masonry structure restrained by steel-tube-bundle shear walls

doi:10.3785/j.issn.1008-973X.2020.03.010

Journal of ZheJiang University (Engineering Science)

2020, Vol. 54

Issue (3): 499-511 DOI: 10.3785/j.issn.1008-973X.2020.03.010

Civil Engineering

Pushover test study of masonry structure restrained by steel-tube-bundle shear walls

Yong CHEN1(

),Yong-quan LI1,Chong-lei XIE2,Kuang-liang QIAN1,*(

),Ye-sheng ZHANG2,Peng-yun CHENG1,Xuan-zuo YE2

1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
2. Greentown China Holdings Limited, Hangzhou 310007, China

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Abstract

Two masonry structures with different boundary restraints were designed and manufactured, and experimental study was then carried out. By using the refined finite element model (FEM), the mechanical behavior of the masonry structures subjected to horizontal loading was analyzed and compared with the experimental results to verify the FEM. Suitability assessment of the two equivalent strut models for masonry structure was carried out. The experimental study and theoretical analysis show that, under the boundary restraint of steel-tube-bundle shear wall, the failure of the masonry structure was initiated by the separation from the surrounding constraints, and then the inside diagonal cracking formed. Furthermore, the masonry structure performed significant diagonal bracing effect. In comparison with the single-strut model, the three-strut model with appropriate parameters can accurately reflect the mechanical characteristics of the masonry structure under lateral load.

Key words： masonry structure steel-tube-bundle shear wall pushover test finite element analysis mechanical performance equivalent strut model

Received: 29 January 2019 Published: 05 March 2020

CLC:

TU 398

Corresponding Authors: Kuang-liang QIAN E-mail: cecheny@zju.edu.cn;qklcivil@zju.edu.cn

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	Yong CHEN
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	Ye-sheng ZHANG
	Peng-yun CHENG
	Xuan-zuo YE

Cite this article:

Yong CHEN,Yong-quan LI,Chong-lei XIE,Kuang-liang QIAN,Ye-sheng ZHANG,Peng-yun CHENG,Xuan-zuo YE. Pushover test study of masonry structure restrained by steel-tube-bundle shear walls. Journal of ZheJiang University (Engineering Science), 2020, 54(3): 499-511.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2020.03.010 OR http://www.zjujournals.com/eng/Y2020/V54/I3/499

钢管束剪力墙约束下砌体结构推覆试验研究

设计制作2个具有不同边缘构件的钢管束剪力墙-砌体结构试件，并开展试验研究. 利用精细化有限元模型，分析2种边缘构件下的钢管束剪力墙-砌体结构在水平荷载作用下的力学行为，并与试验结果进行比较，验证有限元模型的可靠性. 对砌体结构的2种等效简化模型进行适用性分析. 试验和理论分析结果表明，当以钢管束剪力墙作为边缘构件时，砌体结构破坏过程表现为其先与周边约束脱开，砌体结构内部形成斜裂缝后破坏. 砌体结构具有明显的斜撑效应. 相较于单压杆模型，选用合适参数的三压杆模型可以准确反映砌体结构在侧向荷载作用下的受力特征.

关键词： 砌体结构, 钢管束剪力墙, 推覆试验, 有限元分析, 力学性能, 等效斜撑模型

Fig.1 Geometric dimensioning of specimens of GSQ1 and GSQ2

Fig.2 Diagram for connection of steel-tube-bundle shear wall and masonry wall

Fig.3 Photograph for connection of steel-tube-bundle shear wall and masonry wall

Fig.4 Diagram of test loading and lateral support

Fig.5 Photograph of Specimen GSQ1

Fig.6 Layout of displacement transducers

Tab.1 Loads and displacements results of specimens at different phases

Fig.7 Crack distribution diagram of masonry walls of specimens of GSQ1 and GSQ2

Fig.8 Relative displacement between front steel-tube-bundle shear wall and masonry wall varies with lateral loading

Fig.9 Load-displacement curves of specimens of GSQ1 and GSQ2

Tab.2 Horizontal lateral stiffness of specimens at different phases kN/mm

Fig.10 Degradation curves of horizontal lateral stiffness of specimens of GSQ1 and GSQ2

Tab.3 Material properties of Q345 steel

Tab.4 Material properties of concrete，brick and mortar

Fig.11 Mesh of finite element model for masonry

Fig.12 Finite element models of specimens of GSQ1 and GSQ2

Fig.13 First principal stress of masonry of specimen GSQ1 before appearance of diagonal cracks

Fig.14 First principal stress of masonry of specimen GSQ1 at failure

Fig.15 Cracking and deformation of specimen GSQ1 obtained by finite element analysis

Fig.16 Cracking and deformation of GSQ2 obtained by finite element analysis

Fig.17 Load-displacement curves obtained by test and finite element analysis

Fig.18 Diagram of zone in masonry structure subjected to shear and pressure

Fig.19 Equivalent single-strut model

Fig.20 Equivalent three-strut model

Tab.5 Calculation parameters for equivalent single-strut model and equivalent three-strut model

Fig.21 Load-displacement curves based on different finite element models of specimens


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