螺栓连接分节预制地下连续墙接头抗弯性能研究

Bending Resistance of Bolted Prefabricated Diaphragm Walljoints

本文提出了一种螺栓连接分节预制地下连续墙的接头设计,并对其进行静载数值模拟及足尺试验,研究该螺栓连接节点的整体抗弯性能。结果表明:采用该接头形式的分节预制地连墙可以满足承载力和刚度设计要求;静力加载过程中以受拉区螺栓和钢筋受力为主;随着荷载增大,接缝上边缘混凝土受对侧相互挤压发生破坏,此时受拉区螺栓和钢筋尚未进入屈服阶段,可通过调整接缝形状协调接缝受压区的应力而为该墙体提供更高的抗弯承载力。

A joint of bolted segmental prefabricated diaphragm wall was proposed,numerical simulation and foot-scale test under the static load were carried out to investigate the overall flexural performance of this bolted node.The results indicated that the segmental precast diaphragm wall with this joint form could meet the design requirements of bearing capacity and stiffness;During the static loading process,the tensile zone bolts and reinforcement were mainly subjected to the force;With the increase of load,the concrete at the upper edge of the joint was extruded by each other from the opposite side till damage,while the tensile zone bolts and reinforcement had not yet yielded,the shape of the joint could be adjusted to coordinate the stress in the compression zone of the joint to provide a higher flexural load capacity for the wall.