水平荷载作用下土与密肋复合墙结构相互作用的简化分析  

Simplified analysis considering interaction among subgrade,foundation and multi-ribbed slab structure under lateral load

作　　者：李云璋[1] 姚谦峰[1] 黄炜[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《地震工程与工程振动》2010年第5期150-155,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50908188;50878021);国家"十一五"科技支撑项目(2006BAJ04A02-5;2008BAJ08B011-03);陕西省13115项目(2008ZDKG-76);陕西省教育厅自然科学专项基金(09JK523)

摘　　要：针对密肋复合墙结构特有的受力特点,将结构中的隐形外框架取为若干空间梁单元,把密肋复合墙板按等效斜压杆来处理,将上部结构简化为刚架-斜压杆模型,利用该模型建立了考虑地基弹性变形的密肋复合墙结构与其地基基础相互作用的整体分析模型,来分析其受水平荷载作用时的共同工作问题。研究结果表明:密肋复合墙结构刚架-斜压杆模型具有一定的理论性及准确性;考虑土与结构相互作用的影响以后,水平侧移随着地基刚度的增大而减小,基础结构承担的剪力逐渐向上部结构第一层转移,整个密肋复合墙结构的柔度随着地基刚度的增大而减小。计算结果表明:该计算模型可以为密肋复合墙结构与其基础地基的相互作用分析提供了一种可行的简化方法。According to the unique characteristics of multi-ribbed slab structures,the invisible outside frames of the structure were taken as a number of spacial beam elements,the multi-ribbed composite walls were treated as equivalent oblique struts,and the upper structure was simplified as the model of rigid frame with diagonal structure.Using the finite element software,the entire model of soil-structure interaction was established to analyze the interaction under lateral load.The results show that： the model of rigid frame with diagonal structure has a certain accuracy.To consider the impact of soil-structure interaction,the horizontal displacements decrease with the foundation stiffness increasing,the shear forces that the infrastructure bears transfer to the first layer gradually.The flexibility of the entire multi-ribbed slab structure decreases with the foundation stiffness increasing.It is observed through computing example that the improved interaction-model is reasonable.A practicable simplified method for the global static analysis of multi-ribbed slab structures is thus presented.

关 键 词：地基等效刚度 密肋复合墙结构 刚架-斜压杆模型 土与结构相互作用 

分 类 号：TU473[建筑科学—结构工程] P315.98[建筑科学—土工工程]