错层板柱结构体系振动台试验与分析  

Shaking Table Tests and Analysis for Staggered Slab-column Structure System

作　　者：许巍 梁书亭[2] XU Wei;LIANG Shu-ting(Architects&Engineers Co.,Ltd.of Southeast University,Nanjing 210096,Jiangsu,China;School of Civil Engineering,Southeast University,Nanjing 210096,Jiangsu,China)

机构地区：[1]东南大学建筑设计研究院有限公司,江苏南京210096 [2]东南大学土木工程学院,江苏南京210096

出　　处：《建筑科学与工程学报》2022年第2期44-51,共8页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(59878013)。

摘　　要：为研究错层板柱结构的抗震性能,对一个缩尺比例为1∶7的结构模型进行了振动台试验。试验选取2条天然波和1条人工波,对结构模型的自振频率、结构阻尼比、楼层加速度、楼层位移、构件的应变和楼层剪力进行分析,研究了在不同烈度地震作用下错层板柱结构损伤的发展情况及最终的破坏形态。结果表明:在地震作用下,错层板柱结构柱端和梁端出现裂缝,且随着地震烈度的不断增加,裂缝继续发展,直至柱端出现塑性铰,最终在8度罕遇地震工况下结构发生了整体倒塌;错层部位的框架柱受力最为复杂,且应变水平较高,在试验过程中破坏最为严重;随着输入的地震加速度持续增加,主体结构的损伤不断累积,结构自振频率不断降低,结构阻尼比呈增大的趋势;地震烈度不同时,错层板柱结构加速度响应的峰值沿楼层分布规律差别较大,且随着地震烈度的增加,结构动力放大系数有降低的趋势;错层板柱结构抗侧刚度较小,在较低烈度的地震作用下结构层间位移角已经不能满足规范要求;建议在高烈度区域尽量避免采用错层板柱结构。In order to study the seismic performance of staggered slab-column structure, shaking table tests were carried out on a structural model with a scale of 1∶7. Two natural waves and one artificial wave were selected to analyze the natural frequency, structural damping ratio, acceleration, displacement, member strain and floor shear force of the structural model. The development of damage and final failure mode of staggered slab-column structure under different earthquake intensities were studied. The results show that under the action of earthquake, cracks appear at the column end and beam end of staggered slab-column structure, and with the continuous increase of seismic intensity, the cracks continue to develop until plastic hinges appear at the column end, and finally the whole structure collapses under the condition of 8 degree earthquake. The stress of the frame column at the staggered floor is the most complex, the strain level is high, and the damage is the most serious in the experimental process. With the continuous increase of the input seismic acceleration, the damage of the main structure accumulates, the natural frequency of the structure decreases, and the damping ratio of the structure increases. When the seismic intensity is different, the peak value of acceleration response of staggered slab-column structure varies greatly along the floor, and the structural dynamic amplification factor tends to decrease with the increase of seismic intensity. The lateral stiffness of staggered slab-column structure is small, and the interlayer displacement angle of the structure can not meet the requirements of the code under the action of low intensity earthquake. Therefore, it is suggested that staggered slab column structure should be avoided to applicating in high intensity areas.

关 键 词：错层 板柱结构 振动台试验 地震响应 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程]