带弱连接板的框支剪力墙结构模型模拟地震振动台试验研究

Study on shaking table test for frame-supported shear wall structural model with weakly connected slabs

以佛山市某广场A1塔楼的带弱连接板的部分框支剪力墙结构为对象,对其1/35模型进行模拟地震振动台试验,讨论该试验模型的动力特性、破坏模式,分析在7度多遇、7度基本、7度罕遇地震作用下试验模型的加速度、位移响应以及关键部位的应变响应。试验结果表明:在地震作用下,试验模型弱连接板两侧子结构发生反相运动,并在多次7度罕遇地震作用下发生破坏;试验模型的层间位移角基本满足规范要求。建议适当加强走廊弱连接板与两侧子结构连接处的强度并保证延性,充分考虑顶部楼层的鞭梢效应,宜考察速度脉冲型地震下的结构响应。

The 1/35 scaled model of frame-supported shear wall structure with weakly connected slabs in A1 tower building of Foshan Plaza was tested by shaking table simulation. The dynamic characteristics and failure modes of the model were discussed. The acceleration, displacement response and strain response of key parts of the model were analyzed under 7-degree frequent, 7-degree basic and 7-degree rare earthquakes. The test results show that the substructures on both sides of the weakly connected slabs of the test model undergo inverse phase motion under earthquake action, and are destroyed under several 7-degree rare earthquakes. The interlayer displacement angle of the test model basically meets the requirements of the code. It is suggested that the strength and ductility of the weakly connected slab and the substructures on both sides of the corridor should be properly strengthened and the whipping effect of the top floor should be fully considered, and the structural response under the velocity pulse earthquake should be investigated.