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根据某大跨连续刚构箱梁桥的构造特征和设计特点,在有限元(FEM)理论的基础上建立了计算机三维有限元模型,应用实体建模能更好地模拟混凝土结构局部受力性能,结合杆件单元分析了预应力钢筋和混凝土的整体受力特性。同时通过对比JTG D60-2004《公路桥涵设计通用规范》和JTJ 021-89《公路桥涵设计通用规范》中关于车载的修改部分,对预应力混凝土连续刚构桥的空间受力特性进行分析,结合计算机仿真模拟,得出新旧规范车载的变化对连续刚构桥梁设计计算的影响,以期能为设计、施工提供合理的理论依据和修正参考。
According to the structural characteristics and design features of a large span continuous rigid frame box girder bridge, a three-dimensional finite element model of the computer was established based on the finite element (FEM) theory. The application of solid modeling can better simulate the local mechanical behavior of concrete structures. , Combined with the rod unit analysis of prestressed steel and concrete overall stress characteristics. At the same time, by comparing the modifications of JTG D60-2004 “Code for Common Design of Highway Bridges and Culverts” and JTJ 021-89 “Common Specifications of Highway Bridges and Culverts”, the space force characteristics of prestressed concrete continuous rigid frame bridge are analyzed and combined Computer simulation, and draw the new and old normative vehicle changes on the continuous rigid frame bridge design and calculation of the impact, in order to provide a reasonable theoretical basis for the design and construction and revision reference.