耗能钢筋配筋率对自复位桥墩抗震性能影响分析

Influence of Reinforcement Ratio of Energy Dissipation Steel Bars on Seismic Performance of Self Re-centring Pier

利用ABAQUS建立桥墩模型,探究了0.05%、0.10%、0.15%、0.20%、0.25%、0.30%六种不同耗能钢筋配筋率下自复位桥墩抗震性能。结果表明:耗能钢筋配筋率对桥墩的耗能能力有显著影响,随着耗能钢筋配筋率的提高桥墩的耗能能力逐渐提高,但当耗能钢筋配筋率高于0.20%时桥墩的耗能能力提高的幅度降低;耗能钢筋对桥墩延性性能有一定的影响,耗能钢筋配筋率小于0.10%时随耗能钢筋配筋率的提高,桥墩延性性能下降幅度较大,耗能钢筋超过0.10%时随着耗能钢筋配筋率的提高桥墩的延性性能下降幅度基本趋于一致;同时随着耗能钢筋配筋率的提高,桥墩的屈服荷载和抗侧力也有一定的提高。

The pier model was established by ABAQUS,and the seismic performance of self re-centring pier under differ-ent reinforcement ratio of six kinds of energy dissipation steel bars,0.05%,0.10%,0.25%,0.15%,0.20%,0.30%were analyzed.The results show that the energy dissipation ratio of reinforcement pier affects the energy dissipa-tion capacity.With the increase of reinforcement ratio,the energy dissipation capacity of piers improve gradually,but when raising the energy reinforcement ratio higher than0.2%of the pier energy dissipation reduction;energy dissipation bars have certain effects on the pier ductility,energy dissipation ratio of reinforcement less than0.10%energy consump-tion with reinforcement ratio increases,the performance of the pier ductility decreased greatly,reinforced with more than0.10%decreased with the increase in the reinforcement ratio of reinforced pier ductility tends to be consistent with the basic rate;energy reinforcement ratio increases,the yield load of the pier and the anti-lateral force were also improved.