桥台柔性搭板的数值仿真  

Numerical Simulation of Wedge-Shaped Flexible Approach Slab Abutment

作　　者：张宏光[1] 谢永利[1] 

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2006年第3期39-42,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200131881259)

摘　　要：针对高等级公路路桥过渡段出现桥头跳车病害,结合土工格室楔形柔性搭板处治方法,应用Marc非线性有限元软件,对经过楔形柔性搭板加固的台后填土变形及力学特性进行数值仿真分析。结果表明:楔形柔性搭板能够有效减小因地基沉降所引发的桥台台后填土沉降;桥台台后填土顶面曲线及填土内部塑性区域的分布在不同土质及不同沉降条件下差异明显。最后提出了针对不同土质及不同沉降条件下楔形柔性搭板的设计优化方案。Aimed at the jump disease at abutment joint on the high-grade highway, combined with the application of geocell wedge-shaped flexible approach slab, the deformation and mechanics characters of filling behind bridge abutment were analyzed by MARC, which is a nonlinear finite element analysis program. The results show that the wedge-shaped flexible approach slab can effectively decrease the settlement of filling at back abutment which was caused by the ground subsidence, and there are obvious differences at curves of superface and the plastic region in filling when the soil texture and subsidence conditions are different. The designing optimization settlement scheme for wedge-shaped flexible approach slab against different soil texture and subsidence conditions was put forward. 1 tab, 10 figs, 8 refs.

关 键 词：桥梁工程 楔型柔性搭板 桥头跳车 Marc软件 数值仿真 

分 类 号：U443.21[建筑科学—桥梁与隧道工程]