复合受扭型钢混凝土柱抗震性能试验研究

发布时间：2018-05-29 23:30

本文选题：型钢混凝土柱 + 复合受扭　；参考：《建筑结构学报》2017年11期

【摘要】：为研究复合受扭型钢混凝土柱的抗震性能,进行了11个复合受扭型钢混凝土构件和1个作为对比的复合受扭钢筋混凝土构件的拟静力试验,研究配钢形式、轴压比、扭弯比、混凝土强度、配钢率和配箍率等对构件抗震性能的影响。结果表明:复合受扭型钢混凝土构件受力全过程经历未裂阶段、带裂缝工作阶段和破坏阶段;构件的破坏形态有扭型破坏和弯扭型破坏两种;轴压比为0.1较其为0.2的构件、扭弯比为0.5较其为1.0的构件、以及箍筋间距75 mm较其为100 mm的构件的滞回曲线更为饱满;11个型钢混凝土构件转角延性系数的平均值为5.12,其中6个H型钢混凝土构件转角延性系数的平均值为4.17,5个十字型钢混凝土构件转角延性系数的平均值为6.27,钢筋混凝土对比构件的转角延性系数为3.86;随着加载位移的加大,构件的承载力衰减越来越大;相对刚度的退化经历弹性退化、屈服退化和破坏退化阶段;等效阻尼比随着扭率的增大而增大,两者大致成线性关系。
[Abstract]:In order to study the seismic behavior of composite steel reinforced concrete columns subjected to torsion, the pseudostatic tests of 11 composite steel reinforced concrete members and 1 composite torsional reinforced concrete members are carried out, and the steel form, axial compression ratio and torsional bending ratio are studied. The influence of concrete strength, steel distribution ratio and hoop ratio on the seismic behavior of members. The results show that the whole process of composite steel reinforced concrete members subjected to torsion goes through the uncracked stage, the working stage with cracks and the failure stage; the failure patterns of composite steel reinforced concrete members are torsional failure and bending and torsional failure, and the axial compression ratio of 0.1 is 0.2. A member whose torsion / bending ratio is 0.5 and which is 1.0, The hysteretic curve of 75 mm stirrups is more full than that of 100 mm, and the average ductility coefficient of 11 steel reinforced concrete members is 5.12, of which the average value of 6 H-section steel reinforced concrete members is 4.17%. The average angle ductility coefficient of cross section steel concrete members is 6.27, and the angle ductility coefficient of reinforced concrete contrast members is 3.86. With the increase of loading displacement, The degradation of relative stiffness goes through the stages of elastic degradation, yield degradation and failure degradation, and the equivalent damping ratio increases with the increase of torsion ratio, and the relationship between them is approximately linear.
【作者单位】：苏州科技大学机械工程学院;苏州科技大学江苏省结构工程重点实验室;苏州科技大学土木工程学院;
【基金】：国家自然科学基金项目(51078249,51478287)
【分类号】：TU352.11;TU398.9

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