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，本项目将描述钢管柱和工字形截面梁之间的新型半刚性下承式横隔板连接。开口工字形截面是支撑地板体系的最常见和最有效的水平构件。竖向构件可以是开口H型钢，也可以是管形(结构中空)型材。后者由于其高强度重量比、高扭转刚度和美观的结构效率而日益受到人们的欢迎。特别是，圆形和椭圆形的空心部分具有固有的曲率，这使得建筑师可以在建筑环境中表现出创造性和激动人心的建筑中的钢框架建筑。然而，由于工字钢和管柱之间成本效益高的连接存在困难，这些优势往往没有得到充分利用。设计指南也相对缺乏，特别是在循环荷载作用下半刚性连接的可靠性，这将为抗震设计提供基本的科学信息，包括能量耗散行为。这项研究的单调和循环荷载的新试验和数值结果将用于为具有可持续认证的钢结构制定设计规则，以便在世界任何地方执行。这也将有助于英国实现其可持续建设战略。

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.