Research of Elastic-plastic Mechanical Properties of Steel Basket-handle Arch Ribs with Box-section under Horizontal Cyclic Loading
The purpose of this paper is to explore the influence of three parameters,inclination angle,rise-span ratio,and width-span ratio on the mechanical properties of steel basket-handle arch ribs with box-section under horizontal cyclic loading and provide a theoretical basis for seismic design of steel basket-handle arch bridge.The finite element model of 54 steel basket-handle arch ribs with box-section was established,and the hysteresis analysis was carried out to explore the mechanical properties under different parameters such as ultimate bearing capacity of arch ribs,internal forces and deformation of transverse brace.The results show that with an increase in inclination angle and width-span ratio or with a decrease in rise-span ratio,the initial stiffness and ultimate bearing capacity of the arch ribs increase gradually;however,the internal force of the cross brace also increases and produces local instability and damage,which will affect the bearing capacity of the structure.It was shown that the transverse seismic performance of the steel basket handle arch ribs with box-section can be improved greatly by increasing the inclination angle of arch rib,but it is necessary to pay attention to the adverse effect caused by the increase of internal force of transverse brace.
steel basket-handle arch ribsmechanical propertieshorizontal cyclic loadingleaning angle of arch ribsrise-span ratiowidth-span ratio
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