多跨RC连续梁桥抗震与减隔震设计方案比选

分析了传统延性设计与减隔震设计中存在的不足,针对各抗震措施的力学性能与工作特点,分别从延性抗震设计与减隔震设计两种思路,提出6种抗震设计方案.以某跨海公路桥梁引桥为背景工程,建立有限元模型进行时程分析,根据计算结果进行抗震性能的技术比选.结果表明,通过合理选用抗震措施与减隔震措施,各方案均能够提供良好的抗震效果,但工作原理与适用范围不同.

Seismic and isolation design schemes comparison for a multi-span continuous RC girder bridge

The shortage of original seismic design and the isolation design are discussed. According to mechanical behavior and the operating feature of each seismic construction, six feasible seismic designs are proposed from the theory of seismic design and isolation design. The design schemes are compared with each other based on the FEM computational model results which are conducted by time history analysis under the background of approaching bridge from a sea-crossing project. The results of seismic response analysis show that the design scheme can provide better seismic effect by using properly seismic construction, but the working principle and applicable scope are different.