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基于Mindlin平板理论及钢筋混凝土分层组合式模型,提出了平板壳-接缝元-地基系统模型。模型以所构造的接缝元模拟管片衬砌间力的传递,可体现管片中钢筋、接缝处各种构造对衬砌结构力学性能的影响。模型在对管片接缝的模拟中以较容易确定的止水、衬垫、螺栓和混凝土等材料的力学及几何指标替代了传统方法中不易确定的接缝刚度指标,可更真实地反映管片结构的力学性态、提高计算结果的准确性。通过算例验证了模型的合理性和有效性。
Based on Mindlin plate theory and reinforced concrete layered combined model, a flat shell - seam element - foundation system model is proposed. The model simulates the transmission of the force between the lining and the lining with the constructed joint element, which can reflect the influence of various structures on the mechanical properties of the lining structure. The model replaces the hard-to-determine joint stiffness index with the mechanical and geometric indexes of water, gasket, bolt and concrete, which are easier to determine in the simulation of the joint of the pipe, Mechanical properties of sheet structure, improve the accuracy of the calculation results. An example is given to verify the rationality and effectiveness of the model.