不同加载方式下实腹式型钢混凝土T形截面柱损伤试验研究

发布时间：2018-03-17 16:09

本文选题：型钢混凝土　切入点：T形截面柱　出处：《建筑结构学报》2016年05期 　论文类型：期刊论文

【摘要】：为研究不同加载方式下实腹式型钢混凝土T形截面柱沿腹板方向的损伤演化规律,设计并制作了10根缩尺比为1/2、剪跨比为2.5的型钢混凝土T形截面柱,变化参数为轴压比、配钢率及加载制度。基于试验成果,对单调荷载及低周反复荷载作用下T形截面柱的荷载-位移曲线及能量耗散能力进行了分析。结果表明:从初始加载到失效,型钢混凝土T形截面柱的损伤过程可分为5个阶段,分别为无损阶段、轻微损伤阶段、损伤稳步发展阶段、严重损伤阶段和破坏阶段;与单调加载相比,随着位移幅值的增大与荷载循环次数的增加,T形截面柱的承载力、极限变形能力和极限耗能能力均有不同程度的降低。在试验研究的基础上,考虑荷载循环次数、位移幅值与极限承载能力的动态关系以及加载路径对T形截面柱损伤的影响,建立了由最大变形与滞回耗能双参数组合的非线性损伤模型,并验证了该模型的合理性。
[Abstract]:In order to study the damage evolution of T-section columns of solid SRC along the web under different loading modes, 10 T-section columns with a scale ratio of 1 / 2 and a shear span ratio of 2.5 are designed and fabricated. The variation parameters are axial compression ratio. Based on the experimental results, the load-displacement curve and energy dissipation capacity of T-section columns under monotone and low-cycle repeated loads are analyzed. The results show that: from initial loading to failure, The damage process of steel reinforced concrete T-section columns can be divided into five stages: non-destructive stage, slight damage stage, steady damage development stage, serious damage stage and failure stage. With the increase of displacement amplitude and the increase of load cycle times, the ultimate deformation capacity and ultimate energy dissipation capacity of T-section columns decrease in varying degrees. The dynamic relationship between displacement amplitude and ultimate load-carrying capacity and the effect of loading path on the damage of T-section column are discussed. A nonlinear damage model with two parameters of maximum deformation and hysteretic energy consumption is established, and the rationality of the model is verified.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金项目(51308444) 陕西省自然科学基础研究计划项目(2014JQ7288) 西安建筑科技大学创新团队资助计划青年科技基金项目(QN1408)
【分类号】：TU398.9

【参考文献】