摘要
利用Midas Civil建立某桥有限元模型,分析其力学性能,得到结论:拱桥在受载时拱圈截面主要承担压力荷载且拱脚最大压力值可达到-35852 kN,跨中拱圈截面压力值可达到-26143 kN;拱圈在受载时拱脚、跨中截面区域附近主要承担正弯矩,1/4截面附近拱圈截面主要承担负弯矩;拱圈截面强度验算结论表明拱圈各控制截面强度在公路二级荷载作用下均满足《公路圬工桥涵设计规范》(JTG D61—2005)的要求;该拱桥在承载时,拱圈在各种工况下剪切强度安全系数为5.63~56.71,安全储备充足。
Midas Civil is used to establish its finite element model,and the mechanical properties of the bridge are analyzed.The following conclusions are obtained that when the arch bridge is under load,the section of the arch ring mainly bears the pressure load,and the maximum pressure value of the arch foot can reach-35852 kN,the pressure value of the arch ring section at the mid-span can reach-26143 kN.When the arch ring is under load,the arch foot and the vicinity of the mid-span section area mainly bear the positive bending moment,and the arch ring section near the 1/4 section mainly bears the negative bending moment.The result of checking the strength of the ring section shows that the strength of each control section of the arch ring meets the requirements of the"Code for Design of Highway Masonry Bridges and Culverts"(JTG D61—2005)under the secondary load of the highway.The shear strength safety factor is 5.63 to 56.71,and the safety reserve is sufficient.
作者
白宏光
BAI Hongguang(Shanxi Transportation New Technology Development Co.,Ltd.,Shanxi Taiyuan 030006 China)
