学术活动

Deconstructable and Recyclable Steel-Concrete and Steel-Timber Composite Buildings

报告人:Mark Bradford,澳大利亚新南威尔士大学教授,科学院院士

时间:20171127日上午10:10-11:40

地点:土木工程楼824会议室

报告题目:Deconstructable and Recyclable Steel-Concrete and Steel-Timber  Composite Buildings

An important aspect of  designing sustainable building structures is that they should be deconstructable  at the end of their service life, to enable the reuse of materials and to  eliminate the energy associated with their demolition and disposal. In  steel-framed buildings with concrete flooring systems attached with headed stud  steel shear connectors, deconstruction is problematic because of the embedment  of the headed studs into the cast in situ concrete  slab.

The main presentation  describes an alternate system of construction, in which semi-rigid steel frames  are constructed using bolted joints, either to I-section columns or to  concrete-filled steel tubes using flush end plate connections. The concrete  floor is made from slabs of precast geopolymer concrete, connected to the steel  beams by friction-grip high-strength steel bolts in pre-drilled clearance holes.  The tensioning of the friction-grip bolts is shown to provide substantial  interface friction, thereby providing the beams with full shear interaction in  the service load range of response. The experimental study, which confirms the  deconstructability of the system, is used to calibrate finite element analysis  and to formulate design proposals.

A shorter subsequent  presentation introduces work nearing completion on steel-timber composite  buildings, which have even greater attributes in terms of the carbon footprint  of a building, as plantation timber sequestrates carbon dioxide during its  growth. This study also demonstrates that such a structural system is robust and  ductile.

CV:

      Professor Mark Bradford is currently a Scientia Professor at UNSW  Sydney, Federation Fellow and Professor of Civil Engineering, and is the  Director of Research and Founding Director of the Centre for Infrastructure  Engineering and Safety within UNSW Sydney’s School of Civil and Environmental  Engineering. The work reported in the presentation was undertaken when Prof  Bradford held a prestigious Australian Laureate Fellowship, which was preceded  by an Australian Federation Fellowship in which he undertook research on steel  and composite structures subjected to fire loading. His work on deconstructable  composite buildings earned him the prize for “Excellence in Engineering &  Information and Communications Technology” in the New South Wales Premier’s  Prizes for Science and Engineering in 2015. In recent years, Prof. Bradford has  been awarded the Shortridge Hardesty Award of the ASCE, the John Connell Medal  of Engineers Australia and bestowed Distinguished Membership of the ASCE; the  first Australian structural engineer so honoured in the 165-year history of the  ASCE. He currently chairs the National Committee on Mechanical and Engineering  Sciences of the Australian Academy of Science.

Mark  Bradford教授是澳大利亚新南威尔士大学的科学讲座教授,是澳大利亚联邦科学院院士,是新南威尔士大学悉尼校区土木与环境工程学院基础设施工程与安全中心的主任及创始人。他是国际公认的结构工程领域专家,出版了各种语言版本的15本书,撰写了超过600多篇的科学论文,担任14个国际期刊的编委和澳大利亚四个结构工程委员会的委员。本次报告是Bradford教授在担任澳大利亚卓越研究员期间进行的一项工作,该研究是在澳大利亚联邦基金资助下进行的一项火灾下钢和组合结构的研究。他在可拆卸组合建筑结构中的研究使他荣获了2015年新南威尔士的科学和工程优秀奖。近年来,Bradford教授荣获了美国土木工程师协会(ASCE)颁发的Shortridge Hardesty奖,澳大利亚工程师协会的最高奖John Connell Medal,并获得由美国土木工程师协会颁发的“杰出资深成员奖”,他是澳大利亚结构工程领域被美国土木工程师协会在其165年的历史里授予杰出资深会员的第一人。他目前是澳大利亚科学院机械与工程科学委员会的主席。


发布人:柯燎亮(力学系)