摘要
通过数值模拟对规范简化荷载作用下及考虑土与结构相互作用的预制装配式拱涵的涵台位移、拱圈应力和座浆层应力情况进行了分析,并对路堤填土模量对预制装配式拱涵的位移及应力的影响进行了探讨。结果表明:采用规范简化荷载型式与考虑土与结构相互作用的有限元计算结果总体差别不大,计算结果均表明涵台位移较小,拱圈内外两侧及座浆层强度均满足结构安全要求,路堤填土的弹性模量对考虑涵土相互作用的涵洞结构受力和位移的影响较小,而泊松比对其影响较大。
Numerical simulations are performed to investigate the displacement of the lateral walls, the stresses of the arching crown and the block pulp layer by means of simplified load method. The soil-structure interaction aspects of this prefabricated and assembled arch culvert are also investigated. The impact of the elastic modulus of the embankment soils on the displace- ment and stress characteristics of the arch culvert are also simulated. The results indicate that： the displacement and the stres- ses obtained by the simplified load method and the method considering the soil-structure interaction by finite element analysis do not have a significant difference. The results also show that the displacements and the stresses of all culvert elements are within the code requirements for the structural safety. From the soil-structure interaction analyses, the results of displacement and stress are not sensitive to the elastic modulus of the embankment soils. They are more sensitive to the Poissoffs ratio.
出处
《土工基础》
2013年第1期28-31,共4页
Soil Engineering and Foundation
基金
贵州省交通科技攻关项目(2011-122-038)
山西省交通建设科技项目(11-2-17)
关键词
山区公路
拱涵
位移
应力
数值模拟
Highway in Mountainous Area, Arch Culverts, Displacement, Stress, Numerical Simulations
