秦佳俊 谭平 尚继英 李一明 戴淑丹

摘 要：提出一种模块化钢框架单元（以下简称“模块单元”）的连接方法，采用盒式连接组件（BCC-1和BCC-2）、连接板即可实现2、4、8个模块单元的全螺栓连接。分析节点的受力机理，并基于中国规范给出模块单元新型盒式连接节点（以下简称：“盒式节点”）的设计流程和设计方法。以某11层模块化钢框架办公楼为例，分别对一角节点和边节点进行设计，并采用有限元软件Abaqus对节点进行循环往复加载，以验证节点的抗震性能。结果表明：角节点、边节点的塑性铰均先在BCC-1、BCC-2腹板上形成，可以在震后快速更换BCC-1、BCC-2，以恢复节点使用功能;角节点和边节点均符合ANSI/AISC 360-10规范对半刚性节点的要求，且节点滞回曲线均饱满，抗震性能好;节点极限抗弯承载力预测值与有限元结果的比值均大于90%，说明盒式节点构造、设计理念以及提出的连接设计方法合理。

关键词：模块化钢框架;盒式連接节点;节点刚度;抗震性能;设计方法

中图分类号：TU391 文献标志码：A 文章编号：2096-6717（2021）03-0037-07

Abstract： A method to connect modular steel frame units（hereinafter referred to "modular units"） was proposed， which is that 2， 4， or 8 modular units can be connected by innovative box connecting component（BCC-1and BCC-2）， plates through high strength bolts. Force mechanism of box connections were analyzed， and based on the Chinese code， the design flow and design method of the inovative box connections （hereinafter referred to "box connections"） of modular units were proposed. Taking the 11 layers modular steel frame office as an example， an corner connection and an edge connection were designed， and low cycle reciprocating loading were carried out on the connection using the finite element software Abaqus to verify seismic resistance of modular connections. Results show that： plastic hinge of corner connections and edge connections initialed on web of BCC-1 and BCC-2， which can be quickly replaced after an earthquake to restore the function of connections. Both connections met the requirements of the ANSI/AISC 360-10 specification for semi-rigid connections， and hysteresis curve were full， indicating good seismic resistance. Both ratio of ultimate bending capacity of predicted value and finite element results exceed 90%， indicating that the structure， the idea， and the design method are reasonable.

Keywords：modular steel frame; box connections; joint rigidity; seismic performance; design method

模块化钢结构建筑的梁、柱等构件均由工厂加工生产，施工现场只需进行螺栓拼接或者人工焊接即可，具有工业化程度高、轻质高强、施工周期短等优点，是一种极具工业化特性的建筑结构体系[1]。形成可靠模块化结构体系的难点在于一个节点上需要连接两柱四梁、四柱八梁、甚至是八柱十六梁，而且高装配率模块单元需要在工厂完成，现场连接不占用室内空间。目前已经开发了多种模块单元连接形式，Annan等[2]提出全焊接式模块化钢支撑体系的连接节点，并对节点以及钢框架支撑体系进行了深入的研究。……