Research on seismic behavior of unbonded post-tensioned concrete wall with vertical energy-dissipating connections

被引：29
作者：
Dang, Longji [1 ]
Liang, Shuting [1 ]
Zhu, Xiaojun [1 ]
Pang, Rui [2 ]
Yang, Jian [1 ]
机构：
[1] Southeast Univ, Sch Civil Engn, Nanjing 211189, Peoples R China
[2] Henan Univ Technol, Sch Civil Engn, Zhengzhou 450001, Peoples R China
来源：
JOURNAL OF BUILDING ENGINEERING | 2022年 / 45卷
基金：
中国国家自然科学基金;
关键词：
Post-tensioned concrete wall; Seismic performance; X-shaped metal damper; Self-centering capacity; Energy-dissipating capacity; PERFORMANCE; DESIGN; SYSTEMS;
D O I：
10.1016/j.jobe.2021.103478
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
An unbonded post-tensioned (PT) concrete wall system with vertical energy-dissipating connections (UPTWVEC) is proposed that consists of precast wall panels, several X-shaped metal dampers (XMD), mild steel energydissipating bars (ED bars) and PT tendons. In this wall system, the precast wall panels are assembled through XMDs along the vertical joints and ED bars along the horizonal joints to provide the energy-dissipating capacity. The PT tendons installed at the wall toes are used to provide the self-centering capacity. In addition, each wall toe is protected by a steel jacket from the concrete corners spalling or crushing. Firstly, the hysteretic behavior of XMD was studied experimentally. Then, the seismic behavior of the unbonded post-tensioning concrete wall with different parameters were investigated experimentally based on four specimens. It was shown that the wall panels were resilient after tests and the cracks were only observed near the embedded plate in wall panels. In addition, a simplified analysis method was proposed, and the theoretical results matched well with the experimental results. Finally, the finite element analysis (FEA) model of UPTW-VEC was established. Following validating through the experimental results, a parametric study was conducted to investigate the influence of critical parameters on the seismic behavior of UPTW-VEC.
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页数：20
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