摘要
采用桥梁静载试验是对在役桥梁安全评价的有效方法。文中通过对某5跨连续箱梁桥进行静荷载试验,利用有限元软件建立全桥数值仿真模型,分别分析该桥在2~3跨、3~4跨时L/2截面和L/4截面的挠度值;4号墩墩顶荷载下负弯矩值。经过测试,该桥在跨中截面最大的挠度值为11.1mm,而计算值为11.5mm。对3种荷载工况下的挠度值进行对比分析,得出该桥的实测值和理论计算值吻合较好,表明该桥具有足够的桥梁安全储备。
How to ensure the safety performance of existing bridges is a problem that researchers face.Bridge static load test is an effective method for safety evaluation of existing bridges.Static load test of a 5span continuous box girder bridge is carried out by using finite element software to establish a numerical simulation model of full bridge,the bridge deflection values of L/2and L/4cross sections under the working condition of 2-3and 3-4span loading are respectively analyzed,and the bending moment value of No.4pier under top load is negative.After testing,the maximum deflection of the mid-span section is 11.1mm,and the calculated value is 11.5mm.The deflection values of 3kinds of load conditions are compared and analyzed,and the results show that the measured values are in good agreement with the theoretical calculated values.
出处
《交通科技》
2016年第2期11-14,共4页
Transportation Science & Technology
关键词
桥梁
静载试验
挠度
工况
bridge
static loading test
deflection
working conditions
