ABSTRACT

Assembling precast frames subjected to heavy construction loads may require a significant crane operation time when they were assembled by conventional steel joints having a straight beam cut. This study proposed a method that will provide a facile and rapid assembly of heavy precast frames, having the temporary bolting be established as noncritical path. Lower flanges of wide flange beam installed at end of precast beams were partially removed to prevent bottom flange of steel beam from running into flanges of L-shaped guide pockets when steel beam was inserted in L-shaped guide pockets. Permanent connections are made by bolting L-shaped guide pockets. Stable behavior was observed during an erection test of the proposed connection. This study also aimed to investigate an assembly safety of steel beam-column joints with a skewed beam section based on a nonlinear finite element analysis. Strain and stress analysis also demonstrated that stable structural behavior of joint elements was ensured during an assembly of precast frames.

摘要

当它们通过具有直梁切割的传统钢接头组装时，组装承受重建筑载荷的预制框架可能需要大量的起重机操作时间。这项研究提出了一种方法，该方法可以轻松快速地组装重型预制框架，并将临时螺栓连接确定为非关键路径。安装在预制梁端部的宽翼缘梁的下翼缘被部分拆除，以防止钢梁插入L形导槽时钢梁底部翼缘碰到L形导槽翼缘。永久连接是通过螺栓连接 L 形导向袋实现的。在提议的连接的安装测试期间观察到稳定的行为。本研究还旨在基于非线性有限元分析研究具有倾斜梁截面的钢梁柱接头的装配安全性。应变和应力分析还表明，在预制框架的组装过程中，确保了接头元件的稳定结构行为。