The behaviour of semi-rigid through-diaphragm connection between steel I-section beams and tubular columns under monotonic and cyclic loading

采用全尺寸试验和计算模拟相结合的方案，该项目将验证钢管柱和工字形截面梁之间的新型半刚性贯通横隔板连接。开放的I形截面是最常见和有效的水平构件来支撑地板系统。垂直构件可以是开口H形截面或管状（结构中空）截面。后者由于其结构效率（包括高强度重量比、高扭转刚度和令人愉快的外观）而显示出越来越受欢迎。特别是，圆形和椭圆形空心截面具有固有的曲率，使建筑师能够在建筑环境中以创造性和令人兴奋的建筑形式表达钢框架建筑。然而，这些优点往往是开发不足，由于感知的困难，成本效益的连接之间的I型梁和管状柱。也相对缺乏设计指导，特别是循环荷载下半刚性连接的可靠性，这将为抗震设计提供必要的科学信息，包括能量耗散行为。这项研究的单调和循环荷载的新测试和数值结果将用于编制具有可持续证书的钢结构设计规则，以在世界任何地方执行。它还将帮助英国实现其可持续建筑战略。

Employing a combined programme of full-sized testing and computational simulations this project will characterise the novel semi-rigid through-diaphragm connections between steel tubular columns and I-section beams. Open I-sections are the most common and efficient horizontal members to support the flooring system. The vertical members can either be open H-sections or tubular (structural hollow) sections. The latter has shown an increasing popularity due to its structural efficiency including high strength to weight ratio, high torisonal stiffness and pleasant appearance. In particular, circular and elliptical hollow sections possess inherent curvatures which allow architects to express the steel-framed buildings in a creative and exciting architecture in the built-environment. However, these advantages are often under-exploited due to the perceived difficulties on cost effective connections between I-beams and tubular columns. There is also a relative lack of design guidance in particular the reliability of semi-rigid connections under cyclic loading which will provide essential scientific information including energy dissipative behaviour for seismic design. New test and numerical results from this research for both monotonic and cyclic loadings will be used to prepare design rules for steel structures with sustainable credentials to be executed anywhere in the world. It will also help the UK to meet its strategy for sustainable construction.