耗能钢筋配筋率对灌浆波纹管连接矮墩抗震性能影响研究

Effect of Energy-consuming Reinforcement Ratio on Seismic Performance of Grouted Corrugated Pipe Connected with Short Pier

为改善灌浆波纹管连接矮墩的抗震性能,基于荣乌新线高速公路张六庄特大桥工程,利用ABAQUS有限元分析软件对4种不同耗能钢筋配筋率的灌浆波纹管连接矮墩进行了研究,以4种桥墩模型的破坏形态、延性性能、滞回特性以及耗能能力为指标,对比分析了不同耗能钢筋配筋率下灌浆波纹管连接矮墩的抗震性能。通过研究发现,当增大耗能钢筋配筋率时,桥墩的滞回曲线变得越来越饱满,延性性能与耗能能力也得到了显著提升;当耗能钢筋配筋率达到0.35%时,桥墩耗能能力与延性性能提升的趋势有所减缓,因此增设耗能钢筋可以有效改善灌浆波纹管连接矮墩的抗震性能。

In order to impr ove the seismic performance of the grouted corrugated pipe connected with short pier,based on the project of Zhangliuzhuang super large bridge of new line of Rongcheng-Wuhai Expressway, four kinds of grouted corrugated pier connected with short pier with different energy-consuming reinforcement ratios are analyze by ABAQUS finite element analysis software. Taking the failure mode, ductility performance, hysteretic characteristics and energy dissipation capacity of the four pier models as indicators, the seismic performance of the grouted corrugated pipe connected with short pier are compared and analyzed with different energy-consumed reinforcement ratios. It is found that the hysteresis curve of the pier will become more and more full when the reinforcement ratio of the energy dissipation steel bar increase. The ductility performance and energy dissipation capacity are also significantly improved;When the reinforcement ratio reaches 0.35%, the trend of improving the energy dissipation capacity and ductility performance of piers slows down. Therefore, the addition of energy-consuming steel bars can effectively improve the seismic performance of grouted corrugated pipe connected with short piers.