波形钢腹板连续刚构桥抗震性能研究

Analysis on Seismic Performance of Continuous Rigid Frame Bridge with Corrugated Steel Web

通过Midas对某波形钢腹板连续刚构桥建立有限元模型,用反应谱方法进行地震反应分析,并与普通混凝土腹板连续刚构进行对比。分析结果表明:同等跨径的波形钢腹板连续刚构桥的自重要比普通混凝土连续刚构桥小70%左右;普通混凝土连续刚构桥自振频率略大于波形钢腹板连续刚构桥;在地震荷载作用下,所有控制截面的横向弯矩纵向弯矩和扭矩,混凝土箱梁均大于波形钢腹板箱梁,平均相差150%以上。

The seismic performance of continuous rigid frame bridge with corrugated steel web is analyzed through making finite element model with Midas,and using the response spectrum method for seismic response analysis and comparison with ordinary concrete box beam bridge.The results show that the equal span continuous rigid frame bridge small 70%,ordinary concrete continuous rigid frame bridge in frequency slightly larger than the corrugated steel webs continuous rigid frame bridge,under seismic loads,the transverse moment of the control section of the longitudinal bending moment and torque,the concrete box girder is greater than the corrugated steel webs,with an average difference of more than 150%.