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机构地区:[1]西安科技大学建筑与土木工程学院,西安710054
出 处:《结构工程师》2015年第6期34-39,共6页Structural Engineers
摘 要:对于抗震嵌固端在地下室顶板处的高层建筑,建模计算分析时,地下室周边不同回填土对结构有何影响和结构模型计算是否需要带地下室,这是结构设计的一个重要环节。结合带地下室的结构力学模型和顶部水平位移理论计算公式,根据不同回填土与地下结构的相互约束特点,利用软件计算相同荷载作用下的五种不同约束框剪模型,对比分析了结构的自振周期、顶部水平位移和不同层墙、柱底内力变化曲线。结果表明,抗震嵌固端在地下室顶板处的高层结构,建模计算分析时宜带地下室,地下室周边回填土对上部结构刚度和承载力影响较小。Usually the fixed end at the top of the basement is assumed to establish models to calculate and analyze the characteristics of the high-rise building under seismic loading. It is an important process to consider the influence of backfill around the basement if the basement is considered in the structural model. Shear frame model with five different constraints were analyzed under the same load to study the interaction between different kinds of backfill and underground structure. Natural vibration periods, top horizontal displacement, and the internal force curves of the walls and the column at different floors were compared. The results show that it is more appropriate to take the basement into account when analyzing the model of a high- rise building under seismic loads. Different kinds of backfill around the basement have less impact on stiffness and bearing capacity of a structure.
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