某波形钢腹板PC连续箱梁桥的承载能力与抗裂性能

Bearing Capacity and Crack Resistance of PC Continuous Box-girder Bridge with Corrugated Steel Webs

建立了某波形钢腹板PC连续箱梁桥的有限元模型,分析了该桥在不同工况下的内力组合和主要截面的承载性能及抗裂性能。结果表明:中跨跨中截面的抗弯承载力和中墩支点截面斜截面的抗剪承载力均满足规范要求,边跨跨中截面混凝土预加应力大于混凝土的法向拉应力,正截面和中墩支点截面斜截面的抗裂性能均满足规范要求。

The finite element model of a PC continuous box-girder bridge with corrugated steel webs is established,and the internal force combination,bearing capacity and crack resistance of the main sections of the bridge under different working conditions are analyzed.The results show that the flexural and shear capacity of the mid-span section and the oblique section of the pier fulcrum section meet the requirements of the code,the pre-stressed concrete of the mid-span section of the side span is larger than the normal tensile stress of the concrete,and the crack resistance of the oblique section of the normal section and the mid-pier fulcrum section meets the requirements of the code.