基础隔震在高烈度区大高宽比剪力墙结构中的应用与试验研究

发布时间：2018-06-10 03:34

本文选题：高层剪力墙结构 + 基础隔震　；参考：《建筑结构学报》2017年09期

【摘要】：根据预期减震目标,对总高度90.35 m,高宽比达3.96,设防烈度为8度(0.2g)的玉溪公租房项目中基础隔震高层剪力墙结构,按照7度设防对上部结构进行设计,对其进行罕遇地震作用下静力弹塑性(Pushover)分析,并对隔震结构整体进行非线性时程分析。设计并制作了1∶12.5的缩尺模型,对其进行振动台试验研究。结果表明:基础隔震高层剪力墙结构呈现出良好的抗震性能及较高的地震安全储备;在8度多遇、设防地震作用下,结构完好,前5阶频率基本未发生变化,结构尚处于弹性状态;在8度罕遇地震作用下,仅少数连梁轻微开裂;结构层间位移角、隔震支座最大位移、支座应力均未超过规范限值;隔震层滞回曲线饱满、耗能显著;在9度超罕遇地震(0.7g)作用下,未出现倾覆、局部倒塌现象,仅少数连梁、剪力墙出现轻微损伤,频率最大衰减幅度小于10%,刚度下降不明显。
[Abstract]:According to the expected earthquake absorption target, the upper structure of the foundation isolation high-rise shear wall in the Yuxi public rental housing project with a total height of 90.35 m, high width Prida 3.96 and a fortified intensity of 8 degrees or 0.2 g is designed according to the 7 degree fortification. The static elastic-plastic Pushovere analysis and nonlinear time-history analysis of the isolated structure are carried out. The scale model of 1: 12.5 was designed and fabricated, and the shaking table test was carried out. The results show that the high-rise shear wall structure with base isolation has good seismic performance and high seismic safety reserve, and under the action of 8 degrees and earthquake prevention, the structure is intact, and the first five frequencies are basically unchanged. The structure is still in the elastic state, only a few connected beams crack slightly under the action of 8 degrees rare earthquake, the displacement angle of the structure between layers, the maximum displacement of the isolation support, the stress of the bearing are not above the limit value, the hysteretic curve of the isolation layer is full, and the energy consumption is remarkable. Under the action of 9 degree super rare earthquake (0.7 g), there is no overturning, local collapse, only a few connected beams, slight damage to the shear wall, the maximum attenuation amplitude of frequency is less than 10, and the stiffness decrease is not obvious.
【作者单位】：昆明理工大学建筑工程学院;云南省抗震工程技术研究中心;云南师范大学;
【基金】：国家自然科学基金项目(51368027,51168024)
【分类号】：TU973.16

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