地震灾害不仅会直接破坏桥梁结构本身,同时意味着通往灾区的生命线也将中断,最终造成极为严重的后果。因此必须要提升桥梁设计的抗震性要求。本文选取了两种不同类型的梁一联为简支转连续PC小箱梁,另外一联为RC现浇连续梁,针对这两个对象进行了大量计算,在此基础上进行了优化,结果表明,优化之后其抗震性能更好,成本大幅降低。 Earthquake disasters not only directly damage the structure of the bridge itself, but also mean that the lifeline to the disaster area will also be interrupted, which will eventually cause extremely serious consequences. Therefore, it is necessary to improve the seismic design requirements of bridge design. In this paper, two different types of beam-joint are simply supported continuous PC box girder and the other one is RC cast-in-situ continuous girder, a large number of calculations are performed on these two objects. Based on this optimization, the results It shows that after optimization, the seismic performance is better and the cost is greatly reduced.