贝雷架支架结构的平面计算与空间计算结果对比分析

Comparative Analysis of Plane Calculation and Space Calculation Results of Bailey Frame Support Structure

贝雷架作为一种制式器材,因其便利性、实用性,在桥梁施工中应用越来越普遍,贝雷架结构的计算,目前比较普遍的计算方法是将空间结构拆分成平面杆件方式,但这种拆分没有考虑到结构协调变形,与结构实际受力情况有很大差别。为能了解不同计算模式的差异性,以某大桥现浇箱梁为例,对以贝雷架为跨越结构的支架,分别采用2种常用的平面杆件计算模式及空间模型计算模式进行结构计算,对主要杆件的计算结果做对比,从而判断平面计算模式的可靠程度。

As a standard equipment,because of its convenience,practicality,Bailey frame is more and more widespread application in bridge construction. At present,the relatively common calculation method is that space structure is split into plane bar,but the resolution does not take into account the coordination structure deformation,and the actual stress is very different. To understand the differences between different computing modes,taking a bridge cast-in-situ box girder as an example,two kinds of commonly used finite element calculation model and spatial mode are used for structure calculation,and the calculation results of the main members are compared to be disassembled for planar calculation model of credibility.