[1]汪梦甫,胡张齐,罗丹.不同轴压比带钢板暗支撑高阻尼混凝土核心筒抗震性能研究[J].地震工程与工程振动,2018,(05):022-32.[doi:10.13197/j.eeev.2018.05.22.wangmf.003]
 WANG Mengfu,HU Zhangqi,LUO Dan.Study on seismic performance of high damping concrete core walls with steel plate concealed bracings of different axial compression ratios[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2018,(05):022-32.[doi:10.13197/j.eeev.2018.05.22.wangmf.003]
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不同轴压比带钢板暗支撑高阻尼混凝土核心筒抗震性能研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
期数:
2018年05
页码:
022-32
栏目:
论文
出版日期:
2018-10-31

文章信息/Info

Title:
Study on seismic performance of high damping concrete core walls with steel plate concealed bracings of different axial compression ratios
作者:
汪梦甫 胡张齐 罗丹
湖南大学 土木工程学院, 湖南 长沙 410082
Author(s):
WANG Mengfu HU Zhangqi LUO Dan
College of Civil Engineering, Hunan University, Changsha 410082, China
关键词:
核心筒轴压比拟静力试验有限元分析抗震性能
Keywords:
core wallaxial compression load ratioquasi-static cyclic testfinite element analysisseismic performance
分类号:
TU398;TU317
DOI:
10.13197/j.eeev.2018.05.22.wangmf.003
摘要:
提出了一种新型带钢板暗支撑高阻尼混凝土核心筒,并对两个轴压比分别为0.1和0.2的试件HCW2与HCW3进行了低周反复荷载试验,得到了核心筒的破坏模式、滞回曲线、骨架曲线和刚度退化曲线等。试验结果表明,轴压比增大可提高承载力和初始刚度,但同时也会导致延性降低,刚度退化快,耗能能力降低等。分析了翼缘的剪力滞后现象,HCW3初期剪力滞后效应较小,但后期高于HCW2。利用有限元软件OpenSees模拟了两个试件的滞回曲线等,与试验结果吻合较好,在此基础分析了不同轴压比时本文结构形式核心筒(HCW)的承载力与延性,并与普通核心筒NCW、带钢板暗支撑核心筒BCW进行了对比,结果显示,HCW在高轴压比时延性明显高于后两者。
Abstract:
To Study the seismic performance of high damping concrete core walls with steel plate bracings,the quasi-static cyclic tests of two specimen with the axial compression load ratio of 0.1(HCW2) and 0.2 (HCW3) are conducted. The failure pattern is observed, and the hysteric curves, skeleton curves, stiffness degradation curves are obtained. The test results show that, the bearing capacity and stiffness of HCW3 is larger than that of the HCW2, but ductility and energy-dissipation ability of HCW3 is smaller than that of HCW2. Based on the measured longitudinal reinforcement strains at the bottom of the flange panels, and the shear lag factors of the HCW2 and the HCW3 are obtained. The comparison of the shear lag factors of HCW2 and HCW3 shows that, the shear lag factor of HCW3 is smaller at the initial stage, but is much larger after post-peak stage. The seismic behaviors of the test specimens are further examined by finite element (FE) analysis. The FE models of the test specimens are established and verified with the test results. The established FE models are employed to conduct a parametric study for further examination of the bearing capacity, ductility factors and the depth of compression zone for the proposed core wall with different axial compression load ratios, and to compare the ductility factors and ultimate loads of the proposed core wall with traditional concrete core wall (NCW) and concrete core walls with steel plate bracings(side columns without I-shaped steel)(BCW), the ductility factor of the proposed core wall is obviously higher than NCW and BCW when they are under high axial compression load ratio.

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备注/Memo

备注/Memo:
收稿日期:2017-12-10;改回日期:2018-02-05。
基金项目:国家自然科学基金项目(51278181)
作者简介:汪梦甫(1965-),男,教授,主要从事结构抗震研究.E-mail:wangmengfu@126.com
更新日期/Last Update: 1900-01-01