摘要
Abstract
A continuous rigid-frame bridge was cited as an example in this paper. Then by using nonlinear and detail analysis software MIDAS FEA, a simulation analysis was carried out for the spatial stress of zero block under the most unfavorable load combinations in both construction phase and operation phase. Afterwards, the three-dimensional stress data and its distribution rules were obtained. The results show that, a certain tensile stress occurs at the manhole of the transverse diaphragm, which can be settled by adding the steel re-bar and by strengthening the joint between top slab and bottom slab, or by other relevant measures. Moreover, the phenomenon of prestress loss occurs at the place where the top slab connects with the bottom slab, which can be solved by densifying the transverse prestressed steel tendons. The rest of the member can all meet the requirements stipulated in design code.关键词
连续刚构桥/零号块/应力分析Key words
continuous rigid-frame bridge/ zero block/ stress analysis分类
交通工程
