建筑物改造工程结构设计探讨.pdf

建筑物改造工程结构设计探讨摘要近年来,建筑物改造加固工程得到迅速发展,随着人们物质文化生活水平的提高以及生产技术工艺豹发展,生产规模的扩大,建筑物改造加周工程也由建筑物的局部改造加固发展到建筑物的整体改造加|司,乃至相关的数栋建筑物的改造加固。论文论述了建筑物改造加吲结构设计要考虑的问题:建筑使用功能改变、建筑使用功能增加(增落地结构、屋顶增层、层间增加夹层)等结构设计要考虑的问题。屋顶增层,增层结构采用铡结构的1程实践已有,但系统分析总结的文章少见,论文沦述了钢结构作为增层结构的结构类型及其与既有建筑结构共同工作的性能特点,重点分析了钢框架结构作为增层结构与既有建筑结构采用刚接、铰接连接对既有建筑结构的影响。增落地结构,建筑物改造加固工程实践中增加电梯的]:程较多,但增加电梯井改造加固结构设汁的分析文章少见,论文叙述了增加电梯井的几种电梯并结构,与既有建筑结构共同工作的力学性能,重点分析了将楼梯井改造成电梯井的两种结构形式,以及与既有建筑结构连接的做法,两种结构形式分别是钢框架结构和铡筋混凝土框架结构。托粱拆柱,叙述了托梁拆柱的一般方法及分机要点,重点介绍了采用钢铰接梁作拆柱托梁的设计分析及施工方法。托梁拆墙,详细介绍了采用双支承闭合托架的技术,通过与预应力、钢骨混凝土、砌体组合闭畲托架技术比较分析,总结了双支承闭合托架技术的优点及需要进一·步完善的地方。关键词:既有建筑结构增层结构托梁拆柱钢结构连接 Diseussion on Structure Design inBuildings’ RenoVa“on Proj ects Abstract In recent years,buildings’l’enoVation andstrellgtheningprojects haVe grown by leaps with the improvement ofpeople’sliving standard,the deveIopment ofproduction skillsand technoIogy and enlargement ofproduction scale,theprevious sectionalrenovation and strengthening has now developed into a whole building and even into several relatedbujldings. This thesjs covef苫the issuesof stI‘ucture design which should be considered in buildings’renovation and strengthening projects with respect tobujldings’function change,buildings’functlon addition(stlucture—adding on ground,storey—adding on buiIdingroof,i11terJayer_adding between sto“es,etc) Conceming thestorey—addjng on buil幽ng moC thepublic atjons on systematic analysis and summary on steeI structure to be adopted are se】dom seen, notwithstanding mon thesis coVers thesteel structure types,meir perfb肿ance andcharacterjsticsanerconnecting withtheexistingbuilding stmctllre, especia¨y on analysis of the jmpact on theexisting building Jre by】’igid cormection andpin corulection。 Conceming thestmcture—adding on ground,t11epublications on structure design analysis ofelevato卜adding projects are seldom seen,notwithstanding mally such projects thesisdemonstl_ates diflbrem eIeVator shaft strudures and t11edynamic perform