【摘要】 分析了大跨度连续梁拱组合体系桥梁的地震易损部位特点,提出了有利于该类桥梁抗震设计的合理塑性铰出现顺序。简要介绍了桥梁地震位移响应的控制机理,以及两类具体的位移控制装置:弹性连接装置和粘滞阻尼器,并对两种位移控制装置进行了参数敏感性分析。最后以一实桥为例,介绍了大跨度连续梁拱组合体系桥梁的减震设计。研究表明,弹性连接装置和粘滞阻尼器均能有效地控制结构的地震位移响应,但如果考虑到经济性和耐久性因素,弹性连接装置稍有优势。更多还原

【Abstract】 The vulnerable characteristic of long-span continuous beam-arch combination bridges is analyzed,and a reasonable order of plastic hinge is proposed.The control mechanism of seismic displacement response and two displacement control devices,elastic link devices and viscous damper,are briefly introduced.Then parameter sensitivity analysis of the two devices is carried out with response spectrum method.Finally,the seismic design of a bridge is introduced as an example.The results show that both the elastic link devices and the viscous damper with rational parameters may reduce the seismic displacement significantly,but the elastic link device is better if economy and durability factors are considered.更多还原