方钢管混凝土柱-钢梁半刚性框架拟动力试验研究  

PSEUDO-DYNAMIC TEST OF SEMI-RIGID FRAME OF CONCRETE FILLED SQUARE STEEL TUBULAR COLUMN-STEEL BEAM

作　　者：完海鹰[1] 杜维凤 冯然[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽省土木工程结构与材料重点实验室,合肥230009

出　　处：《工业建筑》2015年第12期171-177,共7页Industrial Construction

摘　　要：为进一步研究钢管混凝土柱-钢梁半刚性框架的抗震性能,以缩尺比例1/3的方钢管混凝土柱-钢梁半刚性框架模型为研究对象,模拟地震荷载作用下结构动力性能的试验研究,其中采用不同峰值加速度的El Centro波及Kobe波作为输入地震波分别模拟不同地震作用。通过试验得到钢框架结构各主要构件的应变响应、位移响应、基底剪力、刚度退化和滞回曲线,并用MATLAB软件编制了时程分析程序,对试验框架模型进行弹性时程分析,最后将分析结果与试验结果进行对比分析,两者较为吻合。分析结果表明:随着地震作用的加强,结构刚度逐渐退化,结构基频下降;试验框架模型的滞回曲线比较饱满,表明框架具有很好的延性和耗能能力,抗震性能良好,其破坏模式是钢梁转角过大引起的节点顶部和底部角钢的过大变形,而其他主要构件则表现良好,未受到大的破坏。A pseudo-dynamic test was conducted for semi-rigid frame of concrete filled square steel tubular column and steel beam with one third scale to investigate the seismic behaviour of the frame. The tests were performed by introducing the El Centro and Kobe waves with different peak accelerations,which were used to simulate different seismic loadings on the structure. The strain distribution,story displacement,base shear force,stiffness degradation and hysteretic curves of the main structural components were obtained from the tests. An elastic time-history analysis was also carried out by using MATLAB program,whose results were compared with the test results,which was verified to be accurate. It was demonstrated that the story stiffness and base frequency of the frame gradually degenerated with the increase of the peak acceleration of seismic waves. It was shown from the comparison that the force-displacement hysteretic curve was relatively plump, showing that the frame had high capacity of energy dissipation and fine seismic performance. The specimen was failed by the excessive deformation of the top and bottom angles of the connection resulted from the excessive rotation of the steel beam. Whereas,other main structural components behaved well.

关 键 词：钢管混凝土 半刚性框架 拟动力试验 滞回曲线 弹性时程分析 

分 类 号：TU311.3[建筑科学—结构工程] TU398.9