钢管混凝土剪力墙-板结构振动台试验研究

为研究钢管混凝土剪力墙-板结构体系的抗震性能,对一个比例为1∶8的结构缩尺模型进行模拟地震振动台试验,得到试验模型在4个不同强度水平地震作用下的损伤和位移等宏观地震反应。试验结果表明:结构在多遇地震作用下表现出较大的抗震刚度,在罕遇、极罕遇地震作用下弹塑性发展充分,表现出良好的抗震延性,满足"小震不坏、中震可修、大震不倒"的抗震设防标准;钢管混凝土剪力墙构件在试验过程中未发现损坏,是结构良好延性的保证;板-墙连接节点是结构抗震的薄弱部位。在试验基础上,分别建立新型板-墙结构和传统板-墙结构两个分析模型,进行数值模拟分析对比。结果显示新型板-墙结构在地震作用下刚度退化更慢,极限承载力更高,延性发展充分,具有更好的抗震性能。

Study on shaking table tests of steel tube-confined concrete shear wall and slab structure

In order to study the seismic performance of steel tube-confined concrete shear wall and slab structural system, a scale-up model with a scale of 1∶8 was tested on a shaking table to obtain the macro seismic responses of the structure, such as the damage and displacement, under the action of four different seismic intensity levels. The test results show that the structure has a large seismic stiffness under the action of frequent earthquakes, a full development of elastoplasticity under the action of rare and extremely rare earthquakes, and a good seismic ductility, which meets the seismic fortification standard of "not damage under the frequent earthquake, repairable under the fortification earthquake, and not collapsing under the rare earthquake";the steel tube-confined concrete shear wall component has not been found damaged in the test process, which is the guarantee of good ductility of the structure;the slab-wall joint is the weak position of the structure. On the basis of the test, two analytical models of the new-type slab-wall structure and the traditional slab-wall structure were established respectively, and the numerical simulation analysis and comparison were carried out. The results show that the rigidity degradation of the new-type slab-wall structure is slower, the ultimate bearing capacity is higher, the ductility development is sufficient, and the seismic performance is better.