灌浆套筒连接式圆形桥墩拟静力抗震性能分析  

Quasi-static Seismic Performance Analysis of Grouted Sleeve Connected Circular Bridge Piers

作　　者：程实 CHENG Shi(China Metallurgical Construction Engineering Group Co.,Ltd.,Chongqing 400000,China)

机构地区：[1]中冶建工集团有限公司,重庆4000000

出　　处：《黑龙江交通科技》2025年第3期64-68,共5页Communications Science and Technology Heilongjiang

摘　　要：为了研究灌浆套筒连接式圆形桥墩的承载能力及抗震性能,建立灌浆套筒连接式圆形桥墩精细化有限元模型,对桥墩施加低周往复荷载,分析了灌浆套筒连接式桥墩与现浇桥墩的承载差异;研究了不同影响参数对桥墩抗震性能的影响。有限元计算结果表明:(1)灌浆套筒连接式圆形桥墩具有和现浇桥墩承载能力十分接近,最大承载仅相差4.7%,灌浆套筒连接方式良好可靠。(2)灌浆套筒连接式圆形桥墩的累积耗能能力要弱于现浇桥墩,但其滞回曲线及骨架曲线十分接近,灌浆套筒连接式桥墩具有和现浇桥墩类似的抗震性能。(3)圆形桥墩的横向承载能力随着轴压比的增大而逐渐增大,轴压比越大,加载过程中桥墩破坏越快,但轴压比对桥墩累积耗能影响较小。(4)C40、C45混凝土强度下,桥墩的横向最大承载相对于C35混凝土的横向最大承载分别增大了4.6%、3.3%。混凝土强度对桥墩的最大横向承载有一定的提升,但提升幅度较小。In order to study the load-bearing capacity and seismic performance of circular piers connected by grouted sleeve joints,a detailed finite element model of such piers was established.Low-cycle reversed loads were applied to the piers,and the differences in load-bearing capacity between the grouted sleeve-connected piers and cast-in-place piers were analyzed.The effects of different influencing parameters on the seismic performance of the piers were also studied.The finite element calculation results indicate that:(1)The bearing capacity of grouting sleeve connected round pier is very close to that of cast-in-place pier,and the maximum bearing capacity is only 4.7%different,so the grouting sleeve connection is good and reliable.(2)Although the cumulative energy dissipation capacity of the circular piers connected by grouted sleeve joints is slightly weaker than that of cast-in-place piers,their hysteresis curves and skeleton curves are very close,indicating that the grouted sleeve-connected piers possess similar seismic performance to cast-in-place piers.(3)The lateral load-bearing capacity of circular piers gradually increases with the axial compression ratio.A higher axial compression ratio leads to faster pier damage during loading,but it has a relatively minor impact on the cumulative energy dissipation capacity of the piers.(4)Under the strength of C40 and C45 concrete,the maximum lateral load of pier increases by 4.6%and 3.3%compared with that of C35 concrete,respectively.Concrete strength has a certain increase on the maximum lateral load of pier,but the increase is small.

关 键 词：桥墩 灌浆套筒 圆形截面 拟静力 抗震性能 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]