压弯破坏高强混凝土扁柱恢复力模型试验  

Experiment of the Restoring Force Model for Compression-bending Damaged High-strength Concrete Flat Columns

作　　者：马泽峰 MA Zefeng(Shanghai Fangke Architectural Design Co.,Ltd.,Shanghai 200231,China)

机构地区：[1]上海房科建筑设计有限公司,上海200231

出　　处：《水利与建筑工程学报》2025年第2期32-39,共8页Journal of Water Resources and Architectural Engineering

基　　金：上海市2023年度“科技创新行动计划”科技支撑碳达峰碳中和项目/低碳建造(23DZ1202304)。

摘　　要：为研究高强混凝土扁柱构件的真实力学性能,对6根不同混凝土强度、轴压比及剪跨比的高强混凝土扁柱进行拟静力试验,并对其受力特点和破坏状态进行分析。根据试件的滞回曲线,建立高强混凝土扁柱三折线骨架曲线,并给出骨架曲线的分段方程表达式;针对试件的滞回环形状不饱满的特点,采用归一化的三折线标准滞回环,拟合滞回环关键点与轴压比、剪跨比的函数关系,获得曲线的刚度退化规律。两者结合建立了高强混凝土扁柱的恢复力模型,并与试验结果进行对比。结果表明:提出的恢复力模型与试验结果吻合良好,能够准确描述高强混凝土扁柱在不同加载条件下的刚度退化和强度变化规律。In order to analyze the real mechanical properties of high-strength concrete flat column members,six proposed static tests of high-strength concrete flat columns with different concrete strengths,axial compression ratios and shear span ratios were carried out.The force characteristics and damage states were analyzed through the test phenomena in the loading process.According to the hysteresis curve of the specimen,the triple-fold skeleton curve of high-strength concrete flat column is established,and the expression of the segmental equation of the skeleton curve is given;for the specimen's hysteresis loop shape is not full,the normalized triple-fold standard hysteresis loop is adopted,and the key point of the hysteresis loop is fitted as a function of the axial compression ratio and the shear-span ratio,so as to get the stiffness degradation rule of the curve.The restoring force model of high-strength concrete flat column is established by combining the two,and compared with the experimental results.The results show that the proposed restoring force model is in good agreement with the test results,and can accurately describe the stiffness degradation and strength change rule of high-strength concrete flat column under different loading conditions.

关 键 词：扁柱 拟静力试验 恢复力模型 压弯破坏 

分 类 号：TU375.3[建筑科学—结构工程]