摘要
型钢混凝土混合结构火电厂主厂房中的边节点属于强梁弱柱、变柱异型节点,通过4个1/5缩尺比试件的低周反复加载试验分析探讨此类节点的抗震性能。研究结果表明:强梁弱柱型钢混凝土变柱T型节点主要发生柱端破坏,抗震性能较差,沿纵横向同时配置短肢剪力墙后节点破坏模式变为利于抗震的近梁端破坏;与型钢混凝土柱-钢筋混凝土梁节点相比,型钢混凝土柱-型钢混凝土梁节点的延性性能与耗能能力较强,但受破坏模式影响,强度未得到提高;配置短肢剪力墙后,型钢混凝土柱-钢筋混凝土梁异型边节点的承载能力、滞回性能、变形性能、刚度特性均得到较大提高,且同时配置纵横向短肢剪力墙节点的受力性能改善效果更为明显,有效地改善了该类节点强梁弱柱的不利特性,是一种值得推广应用的新型节点类型。
The edge joints in the SRC hybrid structure for the main building in thermal power plants are classified as strong-beam weak-column variable-column joints. Four 1： 5 joint specimens were tested under the low-cyclic reversed loading to study their seismic performance. The results show that damage occurr at the column ends in the T -type strongbeam weak-column variable-column SRC joints. The seismic performance of this kind of joint is poor, but if short-leg shear walls are built up along the two orthotropic horizontal directions in the abnormal SRC column-RC beam joints, the failure mode will change to the edge beam damage which is favorable for the anti-seismic design. The ductility and energy dissipation of the SRC column-SRC beam joints are better than those of the SRC column-RC beam joints. However, compared with the SRC column-RC beam joints, SRC column-SRC beam joints do not have higher strength due to the failure mode. The bearing capacity, hysteretic performance as well as deformation and stiffness characteristics of the joints can be significantly enhanced when the short-leg shear walls are introduced, and these enhancements are even more effective if the short-leg shear walls are built up both longitudinally and laterally. In this way, the characteristics of the strong-beam weak-column joints can be improved effectively. This new kind of joint is worth popularization and application in building construction.
出处
《土木工程学报》
EI
CSCD
北大核心
2014年第3期47-58,共12页
China Civil Engineering Journal
基金
国家自然科学基金(51178383)
国家科技支撑计划合作单位项目(2011BAJ08B05-4
2012BAJ19B04-02)
教育部博士点新教师基金(20106120120002)
西安建筑科技大学创新团队支持项目
关键词
型钢混凝土
T型节点
强梁弱柱
变柱
力学性能
低周反复荷载
steel reinforced concrete （SRC）
T -type joint
strong-beam weak-column
variable column
mechanic performance
low-cyclic reversed loading
