基于粘弹性边界的橡胶砂地基-结构抗震性能  

Research on seismic performance of rubber sand foundation-structure based on viscoelastic boundary

作　　者：许罡 王凤池[2] 于昊天 徐岚 XU Gang;WANG Feng-chi;YU Hao-tian;XU Lan(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Transportation and Geomatics Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]沈阳建筑大学交通与测绘工程学院,辽宁沈阳110168

出　　处：《兰州理工大学学报》2025年第1期138-144,共7页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51678374)。

摘　　要：通过利用等效一致性粘弹性人工边界,对由分层土构成的地基和结构进行整体的抗震性能有限元分析.通过ABAQUS中支持的弹簧-阻尼器功能对截断的地基边界施加等效一致性粘弹性边界,并通过提取模型中地基的等效节点并对其施加不同的等效节点力从而实现地震作用的暂缓施加.橡胶砂地基可有效降低结构的位移,结构位移最大可降低22.96%,并位移降低的最大处位于结构高度22 m,最大位移角减少为0.1642%.橡胶砂地基较原地基结构加速度降低明显,但在结构底部的加速度较原地基有所提高,并且在节点处加速度最大值较其他位置高.橡胶砂地基较原地基对结构内应力有所降低,但结构最底部应力有所提高,同时节点处的正应力值和剪应力值都较其他位置高,证明节点处更易产生破坏.By using an equivalent uniform viscoelastic artificial boundary,a finite element analysis of the overall seismic performance of foundations and structures composed of layered soils is carried out.The equivalent consistent viscoelastic boundary is applied to the truncated foundation boundary through the spring-damper function supported in ABAQUS,and the earthquake action is suspended by extracting the equivalent nodes of the foundation in the model and applying different equivalent node forces to them.Results indicate that the rubber sand foundation effectively reduce the displacement of the structure,with a maximum reduction of 22.96%,and the maximum displacement reduction is at the structure height of 22 m,with the maximum displacement angle reduction of 0.1642%.Compared with the original foundation,the acceleration of the rubber sand foundation is significantly lower than that of the original foundation,while the acceleration at the bottom of the structure is higher than that of the original foundation,with the maximum acceleration at the nodes higher than that at other locations.Compared with the original foundation,the internal stress of the structure is reduced in the rubber sand foundation.However,the stress at the bottom of the structure is increased.At the same time,both the normal and the shear stress value at the node are higher than other positions,indicating these locations are more susceptible to failure.

关 键 词：地震 粘弹性边界 有限元分析 橡胶砂 

分 类 号：TU472[建筑科学—结构工程]