水平地震作用下严寒地区建筑结构振动响应分析

Vibration response of building structures in severe cold regions under the action of horizontal earthquakes

由于地域和气候的特殊性,严寒地区的建筑结构设计应具有防寒、保暖、防冻且抗震的要求。为此,分析水平地震作用下严寒地区建筑结构振动响应。利用ABAQUS软件构建三维框架-剪力墙结构体系,考虑剪切变形的情况,选择软件中Timoshenko Beam单元,并对钢材和混凝土材料模型进行二次开发,建立建筑结构空间框架有限元模型。输入三种地震波形,分析严寒地区建筑结构振动响应。分析结果表明,在温度为-30~30℃之间时,不同地震波作用的建筑框架梁柱受剪破坏,层间位移变化幅度较大;随着严寒地区环境温度的降低,建筑结构顶端节点振动位移增加、受损程度较高、倒塌风险较大;在严寒地区建筑结构中设置防护围墙,具有节能低碳作用,可以实现建筑结构低碳环保的抗震效果。

Building structures in severe cold regions require a cold-proof,warm-keeping,anti-freezing,and anti-earthquake design because of the particularity of the region and climate.Therefore,the vibration response of building structures in severe cold regions under the action of horizontal earthquakes is analyzed in this paper.ABAQUS was first used to build a three-dimensional frame-shear wall structure system.Then,the Timoshenko Beam element in the software was selected considering the shear deformation,and the steel and concrete material models were redeveloped to establish a spatial frame finite element model of the building structure.Finally,three kinds of seismic waveforms were input to analyze the vibration response of building structures in severe cold regions.Analysis results show that when the temperature is between-30℃and 30℃,beams and columns of the building frame under different seismic waves show shear failure,and the variation range of inter-story displacement is excellent.The vibration displacement at the top node of the building structure and risk of collapse increase with decreasing ambient temperature in severe cold regions.Therefore,protective walls that can conserve energy and decrease carbon content must be established in building structures of severe cold regions,thereby achieving the seismic effect of low carbon and environmental protection for building structures.