隔震与非隔震高桩码头结构的Pushover对比分析

Pushover comparative analysis of isolated and non-isolated pile-supported wharf structure

高桩码头叉桩刚度大,在地震作用下极易发生脆性破坏而引起码头结构的破坏,隔震技术作为提高结构抗震安全性的成熟技术,已经广泛应用于建筑、桥梁等结构中。为此,在叉桩桩顶处增加橡胶隔震支座提高码头结构的抗震安全性。以顺岸无梁板式码头为研究对象,通过SAP2000软件建立全直桩码头结构、非隔震叉桩码头结构、隔震叉桩码头结构3种有限元分析模型,进而对3种结构进行二维Pushover对比分析,对比结构的自振周期、静力Pushover曲线、塑性铰、桩身弯矩以及位移能力5个方面。结果表明,隔震叉桩码头结构具有较大的水平承载能力和位移变形能力,可以有效解决叉桩脆性破坏的问题。

The batter pile of pile-supported wharf has large stiffness and is prone to brittle failure under earthquake to cause the damage of wharf structure.As a mature technology to improve the seismic safety of the structure,seismic isolation technology has been widely used in buildings,bridges and other structures.Therefore,we add rubber isolation bearing at the top of batter pile to improve the seismic safety of wharf structure.Taking the coastal beamless slab wharf as the research object,we build the finite element analysis models of all-plumb-pile wharf structure,non-isolated batter pile wharf structure and isolated batter pile wharf structure by SAP2000 software,carry out the two-dimensional Pushover comparative analysis of the three structures,and compare and analyze the five aspects of natural vibration period,static Pushover curve,plastic hinge,pile bending moment and displacement capacity.The results show that the isolated batter pile wharf structure has large horizontal bearing capacity and displacement capacity,which can effectively solve the problem of brittle failure of batter pile.