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为探究斜桩与全直桩高桩码头结构受强地震作用的损伤特点,以一典型钢管高桩码头为研究对象,并以同一建设场地为背景,在相同服役条件及地质条件下,分别建立斜桩与全直桩高桩码头结构的有限元解析模型,进行结构体系的数值模拟仿真。通过桩体截面弯矩-轴力关系曲线,分析了全直桩码头、斜桩码头两种不同结构形式受不同水平地震作用下的动力响应特性及损伤特点,为高桩码头结构的设计与选型提供合理的依据和参照。研究结果表明,在斜桩结构的内力中,斜桩的轴力起主要支配作用,可有效分担地震的作用力,在输入地震动为350 gal时,考虑到结构的水平位移满足设计要求等因素,斜桩结构在抗震性能方面要稍优于直桩结构,在输入地震动为1 000 gal时,两种结构均发生了塑性破坏,通过塑性损伤开展以及对于地震能量的吸收与耗散的对比分析,得到全直桩结构具有优于斜桩结构的抗震性能的结论。
In order to explore the damage characteristics of the strong piles caused by the strong earthquake caused by the inclined piles and the piles all over the straight piles, taking a typical piled high-pile wharf as the research object and the same construction site as the background, under the same service conditions and geological conditions, Slant pile and all straight pile piled wharf structure finite element analysis model, carries on the numerical simulation of the structural system. Through the bending moment-axial force curve of pile section, the dynamic response characteristics and damage characteristics of two different structures of full-piled wharf and piled-piled wharf subjected to different horizontal earthquakes are analyzed. The design and selection of the structure of piled wharf Type to provide a reasonable basis and reference. The results show that the axial forces of inclined piles play a dominant role in the internal forces of inclined pile structures, which can effectively share the seismic forces. When the input ground motion is 350 gal, considering that the horizontal displacement of structures meets the design requirements , The inclined pile structure is slightly better than the straight pile structure in the seismic performance. When the input ground motion is 1 000 gal, the plastic destruction occurs in both structures, and the plastic damage and the absorption and dissipation of seismic energy are compared It is concluded that the all-straight pile structure has better seismic performance than the oblique pile structure.