此外，可通过加强柜顶的中环梁附近区域来提高结构的整体稳定性。
Moreover, the stability of whole structure can be enhanced by reinforcing the areas around the middle-circle beams on the top cover.
然后，在对三维有限元分析结果研究的基础上，建立了环缝处的纵向螺栓剪切模型，利用该模型可以计算得到错缝拼装衬砌二维梁-弹簧模型中环间剪切弹簧的刚度；
Based on the 3D analysis result, shear models of ring joint bolt is built and shear parameters between rings needed in 2D analysis with beam-spring model can be obtained by this shear model.
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