摘   要：为提高预制地下综合管廊的整体抗震性能，研发了新型组合壳地下综合管廊，并对8个足尺节点试件（4个组合壳管廊节点和4个现浇管廊节点试件）进行了低周反复荷载试验。研究结果表明：组合壳管廊节点和现浇管廊节点的破坏现象相似，L型节点的破坏模式为节点的弯剪破坏，T型节点的破坏模式为节点的弯曲破坏；组合壳管廊节点和现浇管廊节点的滞回曲线形状相似，L型节点的滞回曲线呈“弓形”，T型节点的滞回曲线呈“梭形”，T型节点较L型节点抗震性能优良；现浇管廊底部节点的承载力略高于组合壳管廊底部节点，组合壳管廊顶部节点的承载力略高于现浇管廊顶部节点；各节点的延性系数在3.09~14.76之间，各节点延性良好；组合壳管廊节点的耗能能力强于现浇管廊节点，T型节点的耗能能力强于L型节点；各节点刚度退化规律相似，现浇管廊节点的刚度略高于组合壳管廊节点的刚度。在此基础上，对组合壳管廊节点进行了安全性评价，并提出了相关结构优化措施。

Abstract: In order to improve the seismic performance of prefabricated underground utility tunnel, a new type of composite shell underground utility tunnel was developed, and low cyclic load tests were carried out on 8 full-size specimens, including 4 composite shell utility tunnels and 4 cast-in-place utility tunnels. The results show that the failure modes of the composite shell joints and the corresponding cast-in-place joints are similar. The failure mode of the L-shaped joint is bending-shear failure, and the failure mode of the T-shaped joint is bending failure. The shape of the hysteresis curves of the composite shell joints is similar to that of the corresponding cast-in-place joints. The hysteresis curves of the L-shaped joints are bow-shaped and those of the T-shaped joints are shuttle-shaped. The T-shaped joints have better seismic performance than the L-shaped joints. The bearing capacity of the joints at the bottom of the cast-in-place shell is slightly higher than that at the bottom of the composite shell, and the bearing capacity of the joints at the top of the composite shell is slightly higher than that at the top of the cast-in-place shell. The ductility coefficient of each joint is between 3.09 and 14.76, and the ductility of each joint is good. The energy dissipation capacity of the composite shell joint is stronger than that of the cast-in-place joint, and the energy dissipation capacity of the T-shaped joint is stronger than that of the L-shaped joint. The stiffness degradation of each joint is similar, and the stiffness of cast-in-place joint is slightly higher than that of composite shell joint. On this basis, the safety evaluation of composite shell joint is carried out and relevant structural optimization measures are put forward.