建筑结构学报2026，Vol.47Issue(3)：120-131,12.DOI:10.14006/j.jzjgxb.2025.0394
变形补偿型拉索支撑加固钢筋混凝土框架抗震性能试验研究
Experimental research on seismic behavior of RC frame retrofitted with deformation-compensated cable bracing
摘要
Abstract
To improve the seismic performance of existing RC frame structures,a deformation-compensated cable bracing retrofitting technique was proposed.In this system,steel cables with deformation compensation devices are arranged diagonally in the plane of the frame;both ends of the steel cables are anchored to the core zones of beam-column joints,and prestress is applied to the cables to convert them into inter-story lateral bracing structures.Meanwhile,the existing RC beam and columns are retrofitted using either steel jacketing or section enlargement.To verify the effectiveness of this retrofitting method,four planar frame specimens were designed,fabricated and subjected to quasi-static tests,including one was an unretrofitted frame,one was retrofitted with conventional cable bracing,and the remaining two were retrofitted with the deformation-compensated cable bracing.The test results show that both the conventional and deformation-compensated cable bracing retrofitting methods significantly improve the cracking load,yield load and bearing capacity of reinforced concrete frame structures.Compared with the unretrofitted specimens,the specimens retrofitted with deformation-compensated cable bracing exhibit increases of 197%-286%in cracking load,261%-333%in yield load,and 356%-386%in bearing capacity.Moreover,under the same horizontal displacement,specimens retrofitted with deformation-compensated cable bracing experience less damage than both the unretrofitted specimen and the specimen retrofitted with conventional cable bracing,and their post-earthquake self-centering capacity is significantly enhanced.When subjected to large lateral displacements,the cable stress increment of the specimen retrofitted with conventional cable bracing is extremely high,posing a risk of cable fracture;in contrast,the cable stress increment of the specimen retrofitted with deformation-compensated cable bracing is relatively small.This ensures that the cables remain in an elastic state even under rare earthquakes,thereby preserving their self-centering capacity.Numerical simulation results further indicate that increasing the initial cable prestress can effectively enhance both the bearing capacity and self-centering performance of the retrofitted structure.关键词
钢筋混凝土框架/抗震加固/钢拉索/变形补偿装置/拟静力试验/数值分析/抗震性能/自复位性能Key words
reinforced concrete frame/seismic retrofitting/steel cable/deformation compensation device/quasi-static test/numerical simulation analysis/seismic performance/self-centering behavior分类
建筑与水利引用本文复制引用
刘航,韩明杰,高永发,富筱涵,张兴,张奕慧,张国伟..变形补偿型拉索支撑加固钢筋混凝土框架抗震性能试验研究[J].建筑结构学报,2026,47(3):120-131,12.基金项目
"十四五"国家重点研发计划(2024YFC3808400). （2024YFC3808400）
