土-框架建筑群动力相互作用有限元模拟分析

发布时间：2018-05-19 08:04

本文选题：土 + 高层建筑群　；参考：《地震工程与工程振动》2017年05期

【摘要】：城市建筑越高越密集的发展趋势,对土-高层建筑群的相互作用分析提出了新的理论课题。本文以Davidenkov地基模型作为本构模型,并运用振动台实验实测数据验证该本构模型模拟黏性土动力响应的准确性。在此基础上,运用ANSYS建立土与建筑群动力相互作用的有限元模型,上部结构设计为框架结构,分析土与高层建筑群的动力相互作用对上部结构动力响应的影响,并与单体建筑进行对比。然后改变模型参数,分析上部结构间距和上部结构数量对建筑群动力响应的影响。计算表明,在土-建筑群相互作用体系中,群效应对上部结构的动力响应有影响,群效应使得群内建筑三层以上楼层的绝对加速度峰值、速度峰值都减小,并且平行于震动方向以及中间建筑受群效应影响更为明显;同时,在三层以上时,随着间距的增大,群效应越来越小,随着上部结构的增多,群效应越来越大,但上部建筑不同的布置方位也可能导致不同的结果。
[Abstract]:The higher the urban buildings, the denser the urban buildings are, a new theoretical subject is put forward for the analysis of the interaction between soil and high-rise buildings. In this paper, the Davidenkov foundation model is used as the constitutive model, and the accuracy of the constitutive model in simulating the dynamic response of clay is verified by the measured data of shaking table experiment. On this basis, the finite element model of the dynamic interaction between soil and buildings is established by using ANSYS. The superstructure is designed as a frame structure, and the influence of the dynamic interaction between soil and high-rise buildings on the dynamic response of the superstructure is analyzed. And compared with the single building. Then the influence of superstructure spacing and superstructure quantity on the dynamic response of the building group is analyzed by changing the model parameters. The results show that in the soil-building interaction system, the group effect has an effect on the dynamic response of the superstructure, and the group effect causes the peak absolute acceleration and the peak velocity of the building above the three floors in the group to decrease. At the same time, when the space increases, the group effect becomes smaller and smaller, and the group effect increases with the increase of the superstructure. However, different location of upper buildings may also lead to different results.
【作者单位】：能源工程安全与灾害力学教育部重点实验室四川大学建筑与环境学院;
【基金】：土木工程防灾国家重点实验室开放课题基金项目(SLDRCE10-MB-05)~~
【分类号】：TU435;TU973.15

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