纤维加固震损钢筋混凝土- 砖组合开洞墙体的抗震性能

doi:10.3969/j.issn.1000-565X.2015.07.012

华南理工大学学报（自然科学版） ›› 2015, Vol. 43 ›› Issue (7): 84-91.doi: 10.3969/j.issn.1000-565X.2015.07.012

纤维加固震损钢筋混凝土- 砖组合开洞墙体的抗震性能

雷真¹屈俊童¹王勇²

1．云南大学城市建设与管理学院，云南昆明 650091; 2．成都基准方中建筑设计有限公司，四川成都 610021

收稿日期:2014-08-21 修回日期:2015-01-19 出版日期:2015-07-25 发布日期:2015-06-03
通信作者: 雷真( 1986-) ，男，博士，讲师，主要从事结构抗震加固研究． E-mail:leizhen0916@163.com
作者简介:雷真( 1986-) ，男，博士，讲师，主要从事结构抗震加固研究．
基金资助:
云南省教育厅科学研究基金资助项目( 2014Z008) ; 云南大学校级科研项目( 2014CG012)

Seismic Performance of FRP-Strengthened Seismically-Damaged RC-Brick Masonry Walls with Opening

Lei Zhen¹ Qu Jun-tong¹ Wang Yong²

1. School of Urban Construction and Management, Yunnan University, Kunming 650091, Yunnan, China; 2. Chengdu JZFZ Architectural Design Co. Ltd., Chengdu 610021,Sichuan, China

Received:2014-08-21 Revised:2015-01-19 Online:2015-07-25 Published:2015-06-03
Contact: 雷真( 1986-) ，男，博士，讲师，主要从事结构抗震加固研究． E-mail:leizhen0916@163.com
About author:雷真( 1986-) ，男，博士，讲师，主要从事结构抗震加固研究．
Supported by:
Supported by the Scientific Research Foundation of Yunnan Educational Committee( 2014Z008)

摘要/Abstract

摘要： 通过3 片1 /2 缩尺比例的钢筋混凝土－砖组合开洞墙体试验，研究了严重震损低强度组合墙体采用玄武岩纤维加固后的抗震性能; 通过模拟地震的预损伤试验，以及不加固、纤维直接加固和预损伤后修复加固试件的低周往复荷载试验，对比分析了不同试件的试验现象、开裂荷载、极限承载力和位移、滞回曲线及耗能能力、承载力及刚度退化、变形恢复能力和玄武岩纤维应变等．结果表明: 加固后组合墙体表现出剪－弯破坏的失效模式，优于以剪切破坏为主的未加固试件; 纤维加固对组合墙体初始开裂荷载无提高作用，但对其抗震性能的提高程度明显，震损试件加固后的抗震性能得到恢复并且超过未加固试件．

关键词:

纤维增强材料, 钢筋混凝土－砖组合开洞墙体, 加固, 剪－弯破坏, 剪切破坏, 抗震性能

Abstract: An experiment on three 1:2 scaled reinforced concrete-brick composite walls with opening was conducted to evaluate the seismic performance of severely-damaged low-strength composite walls strengthened by fiber-reinforced polymer (FRP). By a pre-damage experiment simulating earthquake and the low-cycle reversed loading experiments with no strengthening, strengthening by using fibers and rehabilitating the specimen after pre-damage, the specimens were compared in terms of experimental phenomena, cracking load, ultimate bearing load and displacement, hysteretic curves, energy dissipation capacity, bearing capacity, stiffness degradation, deformation recovery capacity and FRP strain. The results show that (1) FRP-strengthened walls exhibit the shear-flexural failure mode, which is superior to the shear-dominant failure mode of the specimen without strengthening; (2) FRP strengthening can improve the seismic performance of the composite walls significantly, but not for the initial cracking load; and (3) the seismic performance of the damaged composite masonry walls strengthened with BFRP can recover or even exceed that of the specimen without strengthening.

Key words:

fiber-reinforced polymer, RC-brick composite wall with opening, strengthening, shear-flexural damage, shear-dominant damage, seismic performance

中图分类号:

雷真屈俊童王勇. 纤维加固震损钢筋混凝土- 砖组合开洞墙体的抗震性能[J]. 华南理工大学学报（自然科学版）, 2015, 43(7): 84-91.

Lei Zhen Qu Jun-tong Wang Yong.

Seismic Performance of FRP-Strengthened Seismically-Damaged RC-Brick Masonry Walls with Opening

[J]. Journal of South China University of Technology (Natural Science Edition), 2015, 43(7): 84-91.

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纤维加固震损钢筋混凝土- 砖组合开洞墙体的抗震性能

Seismic Performance of FRP-Strengthened Seismically-Damaged RC-Brick Masonry Walls with Opening

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