Stability Study of Large-Span Concrete-Filled Steel Tube Multi-Ribbed Tie Arch Bridge
In order to study the stability of the multi-rib tied arch bridge,the multi-rib tied arch bridge with a span of 130m was taken as the research object,and the buckling mode was analyzed by using the method of finite element analysis,and the buckling direction of the modal buckling was observed,and it was found that the tied arch bridge was prone to instability at its structural e-quivalence.A control experimental group was set up,and different control experimental groups were set up by changing the type,position and angle of K-shaped wind brace joints,and the influence of lateral connection on the stability of the arch bridge was de-termined by analyzing the variation law of the characteristic value of the buckling mode.In the same way,parallel experiments were set up to determine the influence of boom damage and boom inclination angle on the stability of the arch bridge at different positions,and a reasonable explanation was given for the abnormal situation.After experimental comparison,the angle control of the k-shaped node is 20°～30°,and the inclination angle of the inclined boom is 11°～38°.Increasing the boom cable force can improve the sta-bility of the arch bridge,and the boom cable force can be increased as much as possible if the external conditions allow.
multi-ribbed tie archfinite element analysisstudy on stabilitylateral
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维普
