高桩码头抗震简化分析方法

Simplified Method for Seismic Analysis of Pile-Supported Wharf

国际贸易的迅速发展,加快了港口工程建设的速度,同时对港口工程的抗震性能提出了更高的要求。高桩码头作为港口工程中最常用的结构型式之一,在我国港口工程建设方面得到了广泛应用。目前对高桩码头的抗震简化分析方法以及桩基特性对高桩码头地震响应的影响方面研究较少。基于此,本文利用开源有限元数值计算平台OpenSees,介绍了高桩码头简化分析方法模型的建立途径,并分析了桩基特性参数对高桩码头关键地震响应量的影响。研究结果表明:钢筋弹性模量对码头桩基的地震响应影响较小,可减少考虑;钢筋的强化阶段对截面达到屈服曲率后的弯矩承载力起主要作用;混凝土抗压强度的增加可降低结构的位移响应峰值;过大或过小的混凝土抗压强度和钢筋屈服强度,都不利于码头结构对地震能量的耗散。

The rapid development of international trade speeds up the construction of port projects, and puts forward higher requirements for the seismic performance of port engineering. Pile-supported wharf, as one of the most common types of port engineering, has been widely used in port engineering construction. At present, there are few studies on the simplified method for seismic analysis of pile-supported wharf and the influence of pile foundation characteristics on its seismic response. In this study, a simplified analysis model of the pile-supported wharf was provided, and the influence of the characteristic parameters of the pile foundation on the seismic response was analyzed by using open-source OpenSees computational platform. The computed results show that: 1) The elastic modulus of reinforcement has a little influence on the seismic response of the pile foundation;2) The reinforcement stage of the steel bar plays an important role in the bending moment bearing capacity after the section reaches the yield curvature;3) The increase of concrete compressive strength can reduce the peak displacement of the wharf;4) Larger or smaller concrete compressive strength and steel bar yield strength are not conducive to the dissipation of seismic energy of the wharf structures.