摘要
为进一步优化变梁截面异型节点的抗震性能,设计制作了一个新型变梁截面异型节点,即PVA-ECC柱-钢筋混凝土梁异型节点,同时制作了一个普通钢筋混凝土变梁截面异型节点作对比,进行了拟静力试验。对比分析了二个试件在水平低周往复荷载作用下的承载能力、滞回曲线、刚度退化、耗能性能以及裂缝发展情况与破坏模式。试验结果表明:在相同配筋下,PVA-ECC柱-钢筋混凝土梁异型节点发生梁端塑性铰破坏,而普通变梁截面异型节点发生柱端塑性铰破坏。在全柱身使用PVA-ECC材料,可以在一定程度上提高变梁截面异型节点的承载力、延性、耗能能力,改善变梁截面异型节点的刚度退化现象,有效提高变梁截面异型节点的抗震性能。
In order to further optimize the seismic performance of the abnormal joint with changed beam section,one PVA-ECC columnreinforced concrete beams abnormal joint and one ordinary reinforced concrete abnormal joint with changed beam section are designed respectively. Quasi-static test of the two test specimens is carried out. Bearing capacity, hysteretic curves, skeleton curves,displacement ductility,stiffness degradation,energy-dissipation ability,crack development and failure pattern of the two test specimens are obtained and compared. The test results show that plastic hinge occurs at the beam-end of the PVA-ECC column and reinforced concrete beam abnormal joint,and the plastic hinge appears at the column-end of ordinary abnormal joint with changed beam section.The use of PVA-ECC material in the whole column can enhance the bearing capacity,ductility and energy dissipation capacity of the abnormal joint with changed beam section to a certain extent,and also improve the stiffness degradation rule of the abnormal joint with changed beam section.
作者
汪梦甫
邱光宇
Wang Meng-fu Qiu Guang-yu(College of Civil Engineering, Hunan University, Changsha 410082, China)
出处
《工程抗震与加固改造》
北大核心
2017年第5期26-33,共8页
Earthquake Resistant Engineering and Retrofitting
基金
教育部博士点基金项目(20120161110022)
关键词
PVA-ECC柱
变梁截面异型节点
抗震性能
拟静力试验
PVA-ECC column
abnormal joint with changed beam section
seismic performance
quasi-static test
