2015年8月下 施工技术 第44卷第16期 CONSTRUCTION TECHNOLOCY 31 DOI:10. 7672/sgjs2015160031 某工程整体抬升后加固方案优化研究 李今保,邱洪兴²,赵启明',章佳娟²,李小凡² (1.江苏东南特种技术工程有限公司,江苏南京210008;2.东南大学土木工程学院,江苏南京210096) 【摘要】本建筑为地下1层、地上局部8层框架结构的沿街商铺,因1层结构的原设计高度为3.50m,不能满足使用 要求,根据业主要求,将该建筑1层层高由3.5m拾升至4.8m。
结构1层柱抬升后,1层柱的计算高度发生变化,结 构的刚度、周期、位移以及结构的配筋等均发生了较大变化,导致计算结果不能满足设计规范要求。
采用增大截面 法进行加固设计后,计算结果可满足设计规范要求,但该加固设计方案存在加固工程量大、加固成本高等缺点。
因 此对加固方案进行优化设计,采用增设短肢剪力墙的优化方案即可满足现行设计规范要求,从加固效果、加固工程 量和加固造价等各方面都得到很好的效果,从而证明加固设计方案必须要进行优化的重要性。
[关键词]加固;建筑物抬升;结构刚度;方案优化 [中图分类号]TU746.3 [文献标识码]A [文章编号〕1002-8498(2015)16-0031-04 OptimizationResearchofStrengtheningSchemeofOverall UpliftofSomeEngineering Li Jinbao',Qiu Hongxing²Zhao Qiming',ZhangJiajuan²,Li Xiaofan² (1.Jiangsu Southeast Special Technical Engineering Co.Lad.,Nanjing,Jiangsu 210008,China; 2.School of Civil Engineering,Southeast Unitersity,Nanjing,Jiangsu 210096,China) Abstract:This building is a frame structure with 8 floors and 1 underground floor, according to the requirement of the owner, the ground floor needs to be lifted from the height of 3.5m to the height of 4.8m.After the overall uplift, the column’ s calculation height is changed, the stiffness, the natural vibration period,the displacement,and the reinforcement are also changed,so the calculation results could not satisfy the requirements of the standard.If the cross sections of the members are increased,the problems can be solved, but the cost of the construction will be too high.According to the parative study,the strengthening design of adding the short-leg shear wallis proposed,the calculation results can satisfy the requirements of the standard.The reinforcement effect is very good and the strengthening cost is reduced. It shows that the optimization research of strengthening scheme is very important. Key words:strengthening;structure uplift;stiffness;scheme optimization 目前我国加固改造工程规模正在逐年增加,由计计算发现结构的刚度、周期、位移以及配筋等均 于加固设计方案的确定直接影响加固工程的构件发生了不同程度的变化。
首层柱的层间位移角和 加固量、造价、使用面积等众多因素,因此加固改造配筋等均不能满足国家现行设计规范的要求,需要 设...