高轴压比柱脚拉杆约束方钢管超高强混凝土柱抗震性能试验  

Experiment on Seismic Behavior of Square Ultra-High-Strength Concrete-Filled Steel Tube Columns With Base Restrained Tie Bars Under High Axial Load Ratio

作　　者：季相濡 胡红松 许力[3] JI Xiangru;HU Hongsong;XU Li(College of Civil Engineering,Huaqiao University,Xiamen 361021,China;Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province,Huaqiao University,Xiamen 361021,China;College of Civil Engineering,Fujian University of Technology,Fuzhou 350100,China)

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]华侨大学福建省结构工程与防灾重点实验室,福建厦门361021 [3]福建工程学院土木工程学院,福建福州350100

出　　处：《华侨大学学报（自然科学版）》2022年第6期712-718,共7页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(51878303,51608210);福建省自然科学基金资助项目(2019J06016)。

摘　　要：为了提高高轴压比方钢管超高强混凝土(SUCFST)柱抗震性能,提出一种在柱脚设置约束拉杆的增强构造方法.开展2根无拉杆约束SUCFST柱和2根柱脚拉杆约束SUCFST柱在高轴压比下的水平低周往复加载试验,研究参数为轴压比和约束拉杆间距.试验结果表明:增设约束拉杆能够显著提高SUCFST柱的受弯承载力、变形性能和耗能性能;减小约束拉杆间距有利于提高大位移角下SUCFST柱的单圈耗能量;增大轴压比对SUCFST柱的变形性能存在不利影响.In order to improve the seismic performance of square ultra-high-strength concrete-filled steel tube(SUCFST) columns under high axial load ratio, a reinforced construction method of setting tie bars at the base was proposed. The horizontal low cycle loading test of two SUCFST columns without restrained tie bars and two SUCFST columns with base restrained tie bars under high axial load ratio was carried out, the experimental parameters were axial load ratio and spacing of tie bars. The test results show that the addition of restraint tie bars could significantly improve the flexural strength, deformation performance and energy dissipation performance of SUCFST columns. Reducing the spacing of tie bars improves the energy dissipation of single circle of SUCFST columns under large drift ratio. Increasing the axial load ratio degrades the deformation performance of SUCFST columns.

关 键 词：方钢管混凝土柱 超高强混凝土 约束拉杆 抗震性能 高轴压比 

分 类 号：TU398.2[建筑科学—结构工程] TU317.1