An innovative prefabricated integrated structure for a cylindrical underground garage is designed as the bracing system during the excavation phase. A new beam-column joint for this structure is proposed. Laboratory tests are implemented to obtain the capacity, hysteresis, skeleton curve and stiffness attenuation performance of the joint. The process of these tests is introduced in detail. Four full-scale specimens are analyzed in laboratory tests to study the influence of lateral loads, connection beam cross sections and column base thicknesses on the static and seismic performance of the joint. The test results show the following conclusions: (1) The lateral load only has a great influence on the stress in the connecting beam. (2) Reducing the cross section of the connection beam and thickness of the base column influence the static and seismic performance of the joints. (3) The thickness of the column base has the greatest influence on the vertical ultimate bearing capacity, skeleton curve, and stiffness attenuation of the joint, followed by the cross section of the connecting beam, and finally the lateral load.

在开挖阶段，为圆柱地下车库设计了一种创新的预制整体结构，作为支撑系统。针对这种结构，提出了一种新的梁柱节点。执行实验室测试以获得接头的容量，磁滞，骨架曲线和刚度衰减性能。详细介绍了这些测试的过程。在实验室测试中分析了四个全尺寸试样，以研究侧向载荷，连接梁横截面和柱基厚度对节点的静力和抗震性能的影响。试验结果表明：（1）横向载荷仅对连接梁的应力有很大影响。（2）减小连接梁的横截面和减小基础柱的厚度会影响节点的静力和抗震性能。（3）柱基的厚度对节点的竖向极限承载力，骨架曲线和刚度衰减影响最大，其次是连接梁的横截面，最后是横向载荷。