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

采用全尺寸测试和计算模拟相结合的方案，该项目将描述钢管柱和工字钢之间的新型半刚性穿过隔膜连接。开口工字钢是支撑楼板系统最常见和最有效的水平构件。垂直构件可以是开放式h型钢或管状（空心结构）型钢。后者已显示出越来越受欢迎，由于其结构效率，包括高强度重量比，高扭转刚度和美观。特别是圆形和椭圆形的空心截面具有固有的曲率，这使得建筑师能够在建筑环境中表达出富有创造性和令人兴奋的钢框架建筑。然而，由于工字梁和管状柱之间经济有效连接的困难，这些优势往往没有得到充分利用。设计指南也相对缺乏，特别是循环荷载下半刚性连接的可靠性，这将为地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.