处于低轴力水平、复杂受力过程的盾构衬砌，如输水盾构隧道、联络通道以及盾构法车站等工程施工全过程对应结构形式，其模型计算对隧道环纵缝接头刚度和强度随衬砌内力的非线性变化提出更高的要求。为解决上述具有特殊使用功能的盾构隧道衬砌内力计算中接头刚度非线性变化明显的问题，提出一种盾构衬砌管片计算模型——壳-接触模型，该模型考虑环纵向螺栓在管片厚度方向的空间分布，在管片接头处采用“压剪耦合”的设计理念。以接头抗弯数值模型与室内抗弯试验结果对比反映模型对接头弯曲特性模拟的合理性；通过与壳-弹簧模型分析结果对比，由管片错台差异体现模型接头整体抗剪刚度、抗剪强度的非线性特征，由环向螺栓力学差异确定模型在接头处于压弯力学组合状态下螺栓对衬砌刚度的实际贡献，由此验证壳-接触模型对衬砌力学行为模拟的合理性。

For shield lining with low axial force level and complex stress process, such as waterconveyance tunnel, contact passage, and shieldbored station, the model calculation requires higher requirements for the stiffness and strength of joints vary with the nonlinear of lining force. Based on such shield tunnel lining, a shellcontact model for calculating shield lining segments is proposed. The design model considers the spatial distribution of circumstantial and longitudinal bolts in the direction of segment thickness, and adopts the design concept of "pressureshear coupling" at segment joints. In this paper, the nonlinear relationship between bending stiffness and internal force of model joints is reflected by the bending model test. By comparing the results of analysis with the shellspring model, the nonlinear characteristics of the overall shear stiffness and shear strength of the model joint are reflected by the difference of the segment dislocation, and the actual contribution of the bolts to the lining under load can be reflected by the mechanical difference of bolts. Through the above analysis, the rationality of the shellcontact model to the lining mechanical behavior simulation is verified.