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目前,国内外桥梁计算设计软件大部分采用梁单元建模。近年来,空间梁格法应用较普遍。梁单元对于大部分梁桥分析比较简单适用,但对于石拱桥分析就不那么适用了。桥梁计算分析中最关注的是结构横向刚度大小和荷载横向分布的问题,空间实体单元模型能很好地解决这类问题。以石拱桥承载能力检测试验为工程背景,介绍了空间实体单元建模在检测方案设计和静、动载试验计算中的应用,并分析对比了实体单元建模计算结果、梁单元建模计算结果以及试验实测结果。
At present, most of bridge design and calculation software at home and abroad adopt beam element modeling. In recent years, space beam grid method is more common. Beam elements are simpler to apply to most beam bridges, but less suitable for stone arch bridge analyzes. The most concern in bridge calculation and analysis is the problem of lateral stiffness and lateral load distribution. Spatial solid element model can solve these problems well. Taking the test of bearing capacity of stone arch bridge as engineering background, the application of spatial solid element modeling in the test scheme design and static and dynamic load test calculation is introduced. The calculation results of solid element modeling are analyzed and compared, and the results of beam element modeling and calculation As well as the test results.