王震　王景全

摘要：为进一步推动预应力节段预制拼装桥墩在高烈度区桥梁工程中的应用，从自复位能力、耗能能力、底节段容许损伤能力和基于性能的抗震设计方法4个方面系统梳理和总结了各国学者开展的相关研究，并指出了当前研究存在的问题以及未来的发展方向。结果表明：无粘结预应力筋能提供更好的自复位能力，桥墩震后残余变形很小；相对于现浇桥墩，该形式桥墩耗能能力较差，需要设置专门的耗能装置，其中外置耗能装置震后可更换，更值得推广；预应力节段预制拼装桥墩鲁棒性差，必须注意提高底节段容许损伤能力；针对预应力节段预制拼装桥墩的基于性能抗震设计才刚刚起步，需要进一步发展。

关键词：桥墩；节段预制；拼装；预应力混凝土；自复位；耗能；抗震性能

中图分类号：TU378文献标志码：A

Abstract： In order to promote the application of prestressed segmental precast and assembled piers in high seismicity areas bridge engineering， the relevant researches were summarized systematically from four aspects， including selfcentering， energy dissipation， damage tolerance of bottom segment and performancebased seismic design， and the existing problems and future research directions were pointed out. The results show that unbonded prestressed tendons can provide better selfcentering， and the residual deformation of pier is very small after the earthquake. Compared with the castinplace pier， the prestressed segmental precast and assembled pier is poor in energy dissipation capacity and need to set up a special energy dissipation device， in which the external energy dissipation device can be replaced after the earthquake and is worth popularizing. The robust performance of prestressed segmental precast and assembled piers is poor， which should be paid attention to improve the allowable damage ability of the bottom section. The performancebased seismic design of prestressed segmental precast and assembled piers has just started and needs further development.

Key words： pier； precast segment； assembling； prestressed concrete； selfcentering； energy dissipation； seismic performance

0引言

在桥梁建设特别是城市桥梁建设中使用节段预制拼装技术不仅可以大幅缩短工期，减少对交通的干扰，而且有助于提高构件的质量，减少全寿命周期成本和对环境的影响[1]。该技术自1962年由米勒用于建造法国塞纳河上的舒瓦齐勒罗瓦大桥以来，逐渐成为桥梁上部结构建设中常用的施工方法之一，在低烈度区的桥梁下部结构中也开始出现了一些工程应用。1971年，美国德克萨斯州约翰肯尼迪堤道桥首次使用了节段预制拼装桥墩，此后的佛罗里达州七英里大桥、德克萨斯州183高速公路高架桥以及新泽西州胜利大桥都采用了该形式的桥墩。……