Static And Dynamic Analysis Of Cable-stayed Spatial Truss

Since 1950's architects introduced the cable-stayed bridge into the civil engineering, the cable-stayed spatial structure developed quickly .At present,cable-stayed spatial truss are widely used.however,interrelative papers are still very few,especially about architecture structure .The paper concentrates on analytical theories and methods of cable-stayed spatial truss responging to longitudinal earthquake and aims at the mechanical properity of cable-stayed spatial truss under static and dynamic loads.The paper includes:The author calculate the structure's inner force and displacement of the free end , analyze the influence of the height and the value of pretress of cable by making use of ANSYS 9.0 soft, pose the concept of critical prestress,conclude the function relation between displacement of the free end, initial strain and the height of cable ,analyze the dynamic properity and point out that Newmark- β method should be adopted when we analyze the dynamic properity of the cable-stayed spatial structure with direct integral test to guarantee the contribution of high mode,finally conclude the functional relation among coefficient of earthquake inner force, initial strain and the height of cable, wish to get some helpful conclusion applied to cable-stayed spatial truss design.