摘要
基于三维显-隐式分区算法,结合传递函数,建立了四类不同场地土体模型和三种不同楼层的单体框架结构模型,分析了SV波垂直入射下框架结构对地震动的影响。结果表明:相同框架结构对地震动的影响因场地条件的变化出现显著不同,其影响范围随土体变软逐渐变小,且影响频段也逐渐变窄并向低频移动。同一场地条件下,框架结构对地震动的影响随土体变软变得复杂。Ⅰ类场地条件下,结构对地震动的影响与结构大小成正相关;Ⅱ、Ⅲ类场地条件下,其受地震动的频带和土体距基础距离共同影响,在相同频带下,相关性的正负因距离不同而不同;Ⅳ类场地条件下,框架结构对地震动影响没有显著不同。
Based on the three⁃dimensional explicit and implicit partition algorithm,combined with the transfer function,four kinds of soil models with different sites and three kinds of single frame structure models with different floors were established,and the influence of the frame structure on the ground motion under the vertical incidence of SV wave was analyzed.The results show that the influence of the same frame structure on ground motion is significantly different with the change of site conditions,and the influence range becomes smaller with the soil becoming soft,and the influence frequency band becomes narrower and moves to low frequency.The influence of different frame structures on ground motion in the same site becomes complicated as soil becomes soft.The effect of structure on ground motion is positively correlated with the size of structure in classⅠsite.Under the conditions of classⅡandⅢsite,the influence of ground motion is affected by both the frequency band of ground motion and the distance between soil and foundation.In the same frequency band,the positive and negative correlations vary with the distance.The effect of frame structure on ground motion has no significant difference under the condition of classⅣsite.
作者
白翔翔
刘启方
BAI Xiangxiang;LIU Qifang(Jiangsu Key Laboratory of Structural Engineering,Suzhou University of Science and Technology,Suzhou 215004,China)
出处
《建筑结构》
北大核心
2024年第7期38-43,共6页
Building Structure
基金
国家自然科学基金项目(51978434)。
关键词
地震动
场地类型
土-结构相互作用
框架结构
ground motion
site classification
soil⁃structure interaction
frame structure
