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对于采用飘浮体系的斜拉桥,主桥在地震作用下将产生较大的纵向位移,必须加以控制才能保证桥梁的抗震安全性,本文探讨了采用弹性连接装置减震和采用粘滞阻尼器不同的布置方式减震,对3种减震方案进行了参数敏感性分析。分析表明,只要选择合理的参数,3种减震方案均能较好地控制主桥在地震作用下的纵向位移,但同时在塔、梁和梁与辅助墩之间设置阻尼器的方案最优。
For the cable-stayed bridge with floating system, the main bridge will have a greater longitudinal displacement under the action of earthquake and must be controlled to ensure the seismic safety of the bridge. This paper discusses the difference between the use of viscous dampers The damping of the three kinds of shock absorption schemes were analyzed by parameter sensitivity. The analysis shows that as long as the reasonable parameters are chosen, the three kinds of damping schemes can all control the longitudinal displacement of the main bridge under the action of earthquake effectively. However, at the same time, the scheme of setting dampers between the tower, beam and beam and auxiliary pier is optimal .