基于ANSYS的大跨斜拉桥行波效应分析

Wave Passage Effect Analysis of Long-span Cable-stayed Bridge Based on ANSYS

以宁波大榭二桥为例,采用有限元ANSYS程序,分析了考虑行波效应下大跨斜拉桥的地震反应,并与一致激励作用下的结果做了比较。分析表明,不考虑行波效应对斜拉桥的主梁不利,而对塔底、墩底内力是偏安全的。

Taking the second Daxie bridge located in Ningbo city for an example, the seismic response analysis for long-span cable-stayed bridges considering wave passage effect is simulated, and compared with the result under the uniform earthquake excitation. The finite element program ANSYS is adopted in the analysis. The results indicate that the beams of cable-stayed bridges are not safe when wave passage effect is not considered and the bridge towers, abutments are opposite. The analysis presents direct instruction for engineering construction of the bridge.