通过纵向地震响应计算探索合理的综合管廊变形缝体系

Exploration on Reasonable Deformation Joint System of Utility Tunnel through Longitudinal Seismic Response Calculation

通过理论计算,运用数值分析方法,提出综合管廊快速简化建模分析方法。建立综合管廊3D有限元模型,研究刚性、柔性、半刚半柔性3种不同变形缝构造形式对综合管廊纵向地震响应的影响。结果表明:相对刚性体系,柔性体系和半刚半柔性体系的接头变形量稍大,但整体在容许范围以内;柔性体系和半刚半柔性体系可以明显改善刚性约束体系中间段管节间轴压力较大的弊端,同时剪力、弯矩也能得到很好的控制。研究结果为综合管廊抗震研究和设计等提供理论依据。

Through theoretical calculation&numerical analysis method,a fast simplified modeling&analysis method of comprehensive pipe gallery is proposed.The 3D finite element model of the comprehensive pipe gallery is established to study the effects of three different structural forms of deformation joints:rigid,flexible and semi-rigid&semi-flexible on the longitudinal seismic response of the utility tunnel.The results show that the joint deformation of flexible system and semi-rigid&semi-flexible system is slightly larger than that of rigid system,but the overall deformation is within the allowable range;flexible system and semi-rigid&semi-flexible system can obviously improve the disadvantage of large axial pressure between pipe joints in the middle section of rigid restraint system,and the shear force and bending moment can also be well controlled.The research results provide a theoretical basis for seismic research&design of comprehensive pipe gallery.