错层异型SRC中节点拟静力试验研究  

Pseudo-Static Experiment on Abnormal SRC Joints with Beams at Different Level

作　　者：李超[1] 白国良[1] 李红星 张春莲 

机构地区：[1]西安建筑科技大学土木学院,西安710055 [2]西北电力设计研究院,西安710075

出　　处：《结构工程师》2010年第4期96-101,共6页Structural Engineers

基　　金：国家自然科学基金(50978216)

摘　　要：对火力发电厂主厂房框排架结构中因工艺存在的错层型钢混凝土异型中节点进行了拟静力试验研究,得到了不同错层高度下的型钢混凝土异型节点的破坏形态特点、节点强度退化、骨架曲线及滞回曲线的特点,讨论了影响型钢混凝土异型中节点性能因素,包括错层的高度、加载方向等,并得出以下结论:随着错层高度的增加,异型节点破坏趋于边节点,节点中部由节点中间趋于短柱,异型节点强度增加,强度退化减慢;正向加载下的异型节点强度高于负向荷载下强度,错层高度的增加使滞回曲线不对称性增加;型钢混凝土梁使异型节点具有更好的抗震性能等。The steel reinforced concrete abnormal joints of the coal-fired power plant frame-bent structures were studied through pseudo-static experiment for the technological requirements. The SRC abnormal joints failure modes,the joints strength degradation,skeleton curve and hysteretic curve were obtained. The facters to influence the performance of profiled steel reinforced concrete joints,including the differential height of beams, loading direction were discussed. It was found that with the increase of differential height, the abnormal joint fails like a side joint, the central of abnormal joint looks like a short column and the abnormal joint strength increases. The abnormal joints strength under positive loading is higher than that under negative load, as the differential height increases, the asymmetric behavior of hysteresis curves can be seen obviously. The abnormal joints with steel reinforced concrete beams have better seismic performance.

关 键 词：型钢混凝土 异型节点 试验 强度退化 滞回曲线 

分 类 号：TU398.9[建筑科学—结构工程]