摘要
In order to figure out the cable flexural rigidity influence on suspension bridges,a contrast model experiment is made:a chain cable model with no flexural rigidity and a wire cable model with some flexural rigidity.And then,four finite element models of a same long-span suspension bridge with different cable element are set up to be analyzed.Both experimental and numerical simulation results show that,with the increase of the span and the decrease of sag-span ratio,the influence of the cable flexural rigidity is significant.The difference of nodes displacement reaches more than 10 cm in construction analysis,which will bring some trouble to the construction.And the difference of the maximum section edge normal stress may reach 15%,which may have an adverse impact onto the bridge.Therefore,considering the cable flexural rigidity is necessary on some analysis of suspension bridges.
In order to figure out the cable flexural rigidity influence on suspension bridges, a contrast model experiment is made： a chain cable model with no flexural rigidity and a wire cable model with some flexural rigidi- ty. And then, four finite element models of a same long-span suspension bridge with different cable element are set up to be analyzed. Both experimental and numerical simulation results show that, with the increase of the span and the decrease of sag-span ratio, the influence of the cable flexural rigidity is significant. The difference of nodes displacement reaches more than 10 cm in construction analysis, which will bring some trouble to the construction. And the difference of the maximum section edge normal stress may reach 15% , which may have an adverse impact onto the bridge. Therefore, considering the cable flexural rigidity is necessary on some analysis of suspension bridges.
基金
Sponsored by Major Research Plan of the National Natural Science Foundation of China (Grant No.90715021)
