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从试验和数值模拟两个方面总结评述了近年来钢悬链立管管土作用方面的研究成果。在试验方面,阐述了钢悬链立管管土作用的非线性行为及其对管道应力和弯矩的影响,其中海床吸力、海床刚度衰减和沟槽的形成增加了钢悬链立管管土作用的复杂性;在数值模拟方面,重点阐述了节点弹簧约束模型,将钢悬链立管看作一根置于一系列非线性弹簧上的梁,利用P-y曲线来表示海床刚度;同时对今后需要继续深化的研究进行了展望,为国内钢悬链立管管土相互作用研究提供了参考。
This paper summarizes the research results of steel catenary riser in recent years from two aspects of experiment and numerical simulation. In the aspect of experiment, the nonlinear behavior of steel catenary riser pipe soil and its influence on pipe stress and bending moment are expounded, in which the suction of sea floor, the attenuation of sea floor stiffness and the formation of groove increase the steel catenary riser In terms of numerical simulation, the node spring restraint model is mainly elaborated. The steel catenary riser is regarded as a beam placed on a series of nonlinear springs, and the Py curve is used to represent the stiffness of the sea floor. At the same time, the future research that needs to be further deepened is prospected, which provides a reference for the research on pipe-soil interaction of steel catenary in China.