多舱组合预制拼装预应力地下综合管廊地震响应分析研究

了探究多舱组合预制拼装预应力地下综合管廊在地震作用下的响应和表现，对进行了“土-结构”相互作用的有限元分析。分析以四舱综合管廊为例，采用有限元动力时程分析的方法，对不同拼装形式的装配式综合管廊进行了对比分析，同时也对有无预应力钢绞线的拼装结构的应力和变形进行了研究。有限元分析结果表明：无预应力钢绞线的拼装结构在地震作用下的加速度和位移响应均大于整体结构；增设预应力钢绞线的左右拼装结构可以消除左右两结构之间的相对位移，同时也可以减少上下拼装结构之间的相对位移，有效增加了结构的整体性。分析可对预应力装配式综合管廊在地震下的结构安全提供了研究依据，对地下综合管廊的进一步的发展应用提供了参考。

Seismic response analysis of fabricated precast prestressed underground multi-compartment municipal tunnel

To explore the seismic response and performance of prefabricated prestressed underground multi-compartment municipal tunnel under earthquakes, the soil-structure interaction finite element analysis was carried out. Taking a four-cabin municipal tunnel as an example, the finite element dynamic time history analysis method is used to compare and analyze the assembled municipal tunnel with different combination forms, and the stress and deformation of the combined structure with or without prestressed reinforcement are also studied. The results of finite element analysis show that: the acceleration and displacement response of the combined structure without prestressed reinforcement is greater than that of the whole structure under different earthquakes; the left and right split structure with prestressed reinforcement can eliminate the relative displacement between the left and right structures, and can also reduce the relative displacement between the upper and lower split structures, effectively increasing the integrity of the structure. The analysis can provide a research basis for the structural safety of prestressed prefabricated municipal tunnels under earthquake, and provide a reference for the further development and application of underground municipal tunnels.