单节段装配式桥墩抗震性能试验研究

与传统整体现浇桥墩相比,装配式桥墩具有工期短、环境影响小、施工质量高等优点.装配式钢筋混凝土桥墩的抗震性能是其设计时需要考虑的关键问题之一.试验设计了一组现浇式及两组装配式桥墩试件,采用拟静力试验方法从破坏形式、水平承载力、位移延性与累积耗能等方面研究其抗震性能.试验结果表明:与整体现浇式桥墩相比,装配式桥墩的水平承载力与前者接近,位移延性与累积耗能能力稍差,残余位移偏大;钢套筒连接装配式桥墩的位移延性与累积耗能能力优于金属波纹管连接装配式桥墩.

Experimental study of seismic performance of single segmental precast bridge piers

Compared with the traditional construction method of overall cast-in-place bridge piers, precast bridge piers technology is conducive to shortening the construction period, lessening the damage on the environment and guaranteeing the construction quality. The seismic performance of precast reinforced concrete bridge piers is one of the key points to the design of precast bridge piers. One set of specimens with cast-in-place type and two sets of specimens with precast type are designed and studied on destruction forms, horizontal bearing capacity, ductility and accumulated energy dissipation, etc.. by using quasi-static tests. The experimental results show that compared with overall cast-in-place piers, precast bridge piers have a similar horizontal bearing capacity, a little poor performance on displacement ductility and accumulated energy dissipation and a bigger residual displacement; the displacement ductility and accumulated energy dissipation of precast bridge piers using steel sleeve connection are better than precast bridge piers using metal bellow connection.