ABSTRACT

This study aimed to demonstrate an erection of the irregular L-shaped precast frames utilizing rigid mechanical joints. Precast columns of L-shaped sections were introduced to replace rectangular columns, which do not fit inside corners; sections are preferred by architects because of their architectural flexibility at the corners of walls. The mechanical connections of steel-concrete composite precast columns were developed using irregular shaped pair of steel plates; each plate was installed at the bottom of the upper columns and on the top of the lower columns. These were then inter-connected via bolts, providing a flexural capacity that was similar to that of conventional monolithic column connections. Column rebars were spliced through metal plates. The columns and beams were also assembled into frames by extended endplates, which were, subsequently, prefabricated with precast beams. An extensive erection test of a full-scale precast frame was performed, demonstrating the efficient and effortless erection of the proposed method. The construction time compared with conventional monolithic assembly was substantially reduced, leading to a corresponding reduction in construction costs. Numerical investigation of the proposed frames was also conducted to verify the structural performance, demonstrating predictable and stable nonlinear structural behavior of the mechanical joints.

摘要

本研究旨在展示使用刚性机械接头安装不规则 L 形预制框架。引入了 L 形截面的预制柱，以取代不适合内角的矩形柱；建筑师更喜欢这些部分，因为它们在墙角处具有建筑灵活性。钢-混凝土组合预制柱的机械连接采用不规则形状的钢板对开发；每块板安装在上柱的底部和下柱的顶部。然后通过螺栓将它们相互连接，提供类似于传统整体柱连接的抗弯能力。柱钢筋通过金属板拼接。柱和梁也通过延伸的端板组装成框架，它们是，随后，用预制梁进行预制。对全尺寸预制框架进行了广泛的安装测试，证明了所提出方法的高效和轻松安装。与传统的整体式组装相比，施工时间大大减少，从而相应地降低了施工成本。还对所提出的框架进行了数值研究，以验证结构性能，展示了机械接头的可预测和稳定的非线性结构行为。从而相应降低建设成本。还对所提出的框架进行了数值研究，以验证结构性能，展示了机械接头的可预测和稳定的非线性结构行为。从而相应降低建设成本。还对所提出的框架进行了数值研究，以验证结构性能，展示了机械接头的可预测和稳定的非线性结构行为。