低周反复荷载作用下钢管自应力钢渣混凝土柱弯矩-曲率关系数值分析  

Numerical Analysis of Moment-Curvature Relations on Self-Stressing Steel-Slag-Concrete-Filled Steel Tube Columns Under Quasi-Static Loading

作　　者：于峰[1] 陈昊 姚弛 秦尹 方圆[1] 卜双双[1] YU Feng;CHEN Hao;YAO Chi;QIN Yin;FANG Yuan;BU Shuangshuang(College of Civil Engineering,Anhui University of Technology,Ma’anshan 243002,China)

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243002

出　　处：《工业建筑》2023年第1期160-168,188,共10页Industrial Construction

基　　金：国家自然科学基金项目(51608003,51878002,52078001);安徽省杰出青年基金项目(2008085J29);安徽省高校自然科学研究重点项目(KJ2020A0234,KJ2020A0261)。

摘　　要：在10根钢管自应力钢渣混凝土柱和4根钢管钢渣混凝土柱抗震性能试验的基础上,对低周荷载作用下试件弯矩-曲率关系展开研究,探析了径厚比、轴压比、剪跨比和钢渣混凝土膨胀率的影响规律,结果表明:各试件均呈现压弯破坏特征,弯矩-曲率曲线分为上升段与稳定段,随着轴压比和钢渣混凝土膨胀率增加,试件弯矩-曲率骨架曲线上升阶段和稳定阶段的斜率均增加,试件抗弯承载力增加。随着径厚比的减小,曲线上升段斜率和试件抗弯承载力增加,而稳定段的斜率和试件抗弯承载力都无明显变化。随着剪跨比增加,曲线各阶段的斜率增加,但对抗弯承载力无明显影响。基于试验,选择钢管和自应力钢渣混凝土的本构关系模型,编制MATLAB全过程分析程序,分析了各因素对低周反复荷载作用的钢管自应力钢渣混凝土柱弯矩-曲率骨架曲线的影响规律。Accroding to the seismic performance experiments of 10 self-stressing steel-slag-concrete-filled steel tube columns and 4 steel-slag-concrete-filled steel tube columns,the moment-curvature relations of specimens under quasi-static loading were studied,and the influence of different parameters were analyzed,including diameter-thickness ratios,axial compression ratios,ratios of shear spans to effective depths and expansivity of steel slag concrete.The results indicated that all specimens failed under bending,the moment-curvature skeleton curves of specimens were divided into rising stage and stable stage.As the axial compression ratio and expansivity of steel slag concrete increased,the slope of moment-curvature skeleton curves and the flexural capacity of specimens increased in both rising and stable stages.The decrease of diameter-thickness ratios led to the increase of the slope of curves and the flexural capacity of specimens in the rising stage,while the effect of diameter-thickness ratios was not obvious in the stable stage.The slope of skeleton curve increased with the increase of ratios of shear spans to effective depths in each stage,while the flexural capacity did not change obviously.Based on the experimental results,the constitutive relation models of steel tube and self-stressing steel slag concrete were selected,the whole process analysis was compiled by MATLAB,and the influence laws of each parameter on bending moment-curvature skeleton curves were analyzed by the program.

关 键 词：钢管混凝土 自应力混凝土 钢渣混凝土 承载力 抗震性能 滞回性能 骨架曲线 全过程分析 

分 类 号：TU398.9[建筑科学—结构工程]