建筑结构学报2023，Vol.44Issue(12)：22-31,10.DOI:10.14006/j.jzjgxb.2022.0691
外设自复位构件加固钢筋混凝土框架抗震性能试验研究
Experimental research on seismic behaviors of RC frame strengthened with attached self-centering member
刘航 1范钰麟 2韩明杰 1曾永璇 2张国伟 2秦昌安2
作者信息
- 1. 北京市建筑工程研究院有限责任公司,北京 100039
- 2. 北京建筑大学土木与交通工程学院,北京 100044
- 折叠
摘要
Abstract
In view of the problems existed in the seismic strengthening and reconstruction project of an existing reinforced concrete frame structure,a method using attached prefabricated self-centering members to strengthen the reinforced concrete frames is proposed.That is,the existing frame beams and columns are strengthened by enlarging section method,and prefabricated beam members are installed side by side along the frame beams.Unbonded prestressed tendons are installed throughout the length of the prefabricated beams and anchored to the outer side of the frame columns.Energy dissipating steel bars are installed between prefabricated beams and frame columns,so that the reinforced frame can obtain certain self-centering ability under the given performance design objective.In order to verify the strengthened effect of this method,three plane frame structure test specimens were designed and constructed,and the quasi-static test was carried out.Among them,one specimen was the non-strengthened comparative specimen,and two specimens were the frame structure specimens strengthened with attached prefabricated self-centering members.The test results show that the method can significantly improve the seismic capacity and ductility of the reinforced concrete frame structure,and the energy dissipation capacity is significantly enhanced.The residual deformation of the strengthened specimen is significantly smaller than that of the non-strengthened specimen within a certain range of inter-story drift ratio,and the self-centering capacity after the earthquake is significantly enhanced.The refined finite element simulation analysis is carried out for the test,and the finite element analysis results are in good agreement with the test results.This method can be combined with the performance-based seismic strengthening design to meet the demand of displacement based performance-based strengthening design.关键词
钢筋混凝土框架/自复位构件/抗震加固/增大截面/拟静力试验/抗震性能Key words
reinforced concrete frame/self-centering member/seismic strengthening/enlarging section/quasi-static test/seismic behavior分类
建筑与水利引用本文复制引用
刘航,范钰麟,韩明杰,曾永璇,张国伟,秦昌安..外设自复位构件加固钢筋混凝土框架抗震性能试验研究[J].建筑结构学报,2023,44(12):22-31,10.
