两港公路(S32-机场南进场路立交)匝道减隔震支座墩底内力效应计算分析

Computational Analysis on Effect of Internal Force at Pier Bottom with Isolation Bearings on Ramps in Lianggang Highway(S32-Airport South Entry Rd Viaduct)

结合S32-机场南进场路立交工程实例,采用Midas有限元分析软件和高桩承台计算软件,建立不同立柱高度的高架段模型。分析在E1、E2地震力作用下,采用板式橡胶支座与减隔震支座的墩底内力差异。通过对内力数据的整理判别,分析减隔震支座对地震力作用的削减能力,并判别立柱的高低对其削减能力的影响,最后初步分析产生这种现象的原因,得出有益于类似工程设计建设的结论。

In combination with the project example of S32-Airport South Entry Rd Viaduct,by using Midas finite element analysis software and the high-pile base slab calculation software,the different column heights of viaduct models are established.The differences of the internal forces at pier bottoms of plate-type rubber bearing and isolation bearing are analyzed under the action of E1 and E2 seismic forces.By sorting out and judging the internal force data,the ability of isolation bearing to reduce the seismic force is analyzed,the influence of the height of the stand column on its reducing ability,and finally the causes of this phenomena is preliminarily analyzed in order to obtain the conclusion beneficial to the design and construction of the similar projects.