跨度(55+88+55)m V形连续刚构桥基础刚度对整体结构的内力影响

V形墩连续刚构桥由于其优美的造型及较好的受力特点,在城市桥梁中得到越来越广泛的应用。结合西安地铁3号线(55+88+55)m V形连续刚构桥的设计实例,阐述该V形连续刚构桥主墩基础刚度的模拟方法及基础刚度对连续刚构桥内力的影响。特别是在矮墩连续刚构桥的设计中,通过合理地考虑基础刚度对总体刚度的影响将会直接关系到基础设计的经济性。

Influence of Foundation Stiffness upon Internal Force of Integral Structure of (55+88+55)-m Continuous Rigid Frame Bridge with V-type Pier

Because of the beautiful shape and good mechanical performance,the continuous rigid frame bridge with V-type pier is getting more and more extensive application in the urban bridges.Combining with a design example of V-type(55+88+55)-m continuous rigid frame bridge of Xi'an Metro Line 3,this paper expounds the simulation method of main pier foundation stiffness,also expounds the influence of the foundation stiffness upon the internal force of continuous rigid frame bridge.Especially for the design of continuous rigid frame bridge with low pier,the reasonable consideration about the influence of foundation stiffness upon integral stiffness will be directly related to the economical efficiency of foundation design.