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以有限元软件ABAQUS作为分析平台,建立波浪荷载作用下格型钢板桩结构稳定性及应力分析的三维弹塑性有限元分析模型。格型钢板桩采用壳体单元模拟,在相邻板桩之间设置铰接连接器模拟板桩之间的相对转动;土体采用Mohr-Coulomb本构模型模拟,在格型钢板桩与其内、外土体之间设置接触面单元模拟它们之间的滑移、张裂和闭合。结合某实际工程,研究结构的破坏模式、失稳特性和应力分布特性,分析参数变化对结构稳定性和环向拉力的影响,并对格内土体的剪切变形进行分析,建议格型钢板桩锁口拉力的验算断面。结果表明,铰接连接器的设置对于结构稳定性影响不大,但对环向拉力有一定影响;格内土体的剪切变形主要发生在格体中轴处,符合太沙基法结论。
Using finite element software ABAQUS as the analysis platform, a three-dimensional elasto-plastic finite element analysis model for the stability and stress analysis of the lattice steel sheet pile under wave loads is established. The grid steel sheet pile is modeled by the shell element, and the hinge joint is set up between the adjacent sheet pile to simulate the relative rotation between sheet pile. The soil is simulated by Mohr-Coulomb constitutive model. Set the contact surface between the soil units to simulate the slip between them, split and closed. Combined with a practical project, the failure modes, instability characteristics and stress distribution characteristics of the structure are studied. The influence of the parameter changes on the structural stability and hoop tension is analyzed. The shear deformation of the soil is analyzed, Pile locking port tension checking section. The results show that the arrangement of hinged connectors has little effect on the structural stability, but has some influence on the circumferential tensile force. The shear deformation of the soil mainly occurs at the center axis of the lattice, which is in accordance with the conclusion of the Tai Sha Ji method.