空间异形混合桥塔钢混凝土结合段有限元分析

Finite Element Analysis on Steel-concrete Composite Segment of Spatial Hybrid Bridge Pylon

钢混凝土混合结构在斜拉桥的设计中被广泛应用。临沂市西安路祊河大桥为独塔斜拉桥,桥塔采用三根塔柱组成空间异形混合桥塔,桥塔的三根塔柱均采用钢混凝土混合结构型式。对大桥的空间异形混合桥塔塔柱的钢混凝土结合段建立有限元模型,并对其进行分析。重点研究采用PBL连接件的全截面承压传剪式钢混凝土结合段各构件的受力情况及传力效应,重点强调在此类钢混凝土结合段设计中应注意PBL连接件的传力不均匀性及混凝土受钢结构传力所产生的拉应力。

The steel-concrete composite structure is widely used in the design of cable-stayed bridge.Benghe River Bridge is a single-pylon cable-stayed bridge in Xian Road of Linyi City.The bridge pylon is a spatial hybrid pylon composed of three pylon pillars.Three pillars of bridge pylon are all the steel-concrete composite structures.The finite element model is established for the steel-concrete composite segment of the spatial hybrid pylon pillars of bridge to carry out the analysis.The article studies the stress status and force transferring effect of each component in the whole cross section pressure bearing shear steel-concrete composite segment with PBL connectors,and emphasizes the force transferring nonuniformity of PBL connector and the tensile stress of concrete caused by the force transferring of steel structure for attention in the design of steel-concrete composite segment.