波形钢板-UHPC组合桥面板结构截面优化

对实腹式波形顶板-UHPC(超高性能混凝土)组合桥面板进行了改进, 采用空腹式结构建立波形钢板-UHPC组合桥面板有限元模型, 研究UHPC层厚度、波形钢板厚度、波形长度、下缘板宽度和波形高度等截面参数变化对组合桥面板受力特性的影响, 并确定其合理取值范围. 在此基础上, 通过理想点法对参数组合进行优化, 得到合理的参数匹配. 研究结果表明 相较于实腹式组合桥面板, 优化后的组合桥面板自重减小35%, 钢板弯折处应力减小16%; 相较于正交异性钢桥面板, 桥面板用钢量减小7%, 顶板与U肋连接位置应力减小47%.

Section optimization of the innovative corrugated steel-UHPC composite bridge deck

Based on the spandrel-filled innovative corrugated steel-UHPC composite bridge deck, the FEM of the improved structure is developed by choosing an open-wed structure in this study. The effects of varied parameters including the UHPC layer thickness, the corrugated steel thickness, the wave length, the lower edge plate width, and the wave depths are studied and the feasible ranges are determined. The parameters’ combination is further optimized by the Ideal Point solution method, with which the reasonable parameter matching is established. Comparing with the spandrel-filled composite bridge deck, the weight is reduced by 35%, and the tensile stress in the bend of steel is reduced by 16%. Comparing with the orthotropic steel bridge deck, the steel quantity is reduced by 7%, and the tensile stress in the rib-to-deck weld joints is reduced by 47%.