塔梁间纵向弹性约束对斜拉桥抗震性能的影响

目前漂浮、半漂浮体系斜拉桥是广泛采用的的斜拉桥体系。在地震荷载作用下这两种体系的内力反应比较小，而位移反应比较大，常常不能满足要求。对塔梁间纵向弹性约束对斜拉桥抗震性能的影响进行了理论分析和实例计算。计算结果表明它能显著的减小漂浮、半漂浮体系斜拉桥在地震作用下的位移反应，又能使内力反应满足抗震要求，因此它不失为一种有效的改善漂浮、半漂浮体系斜拉桥抗震性能的手段。

The Influence of Longitudinal Elastic Constraints between the Tower and Beam on the Seismic Performance of Cable-stayed Bridges

Floating and half-floating cable-stayed bridges are widely used today.Under the load of seism internal force is relatively minor,but the displacement is quite large,so it seldom meets the needs.In this paper the influence of longitudinal elastic constraints between the tower and beam on the seismic performance of cable-stayed bridges are analyzed theoretically, and an example is taken to calculate.The result shows that under the load of seism the constraints can remarkably reduce displacement of floating and half-floating cable-stayed bridges and make the internal force meet the needs.So applying elastic constraints between the tower and beam is a method of improving the seismic performance of floating and half-floating cable-stayed bridges.