某钢结构厂房柱下混凝土基础加固设计与施工_王新

20086()Jun2008292JournalofZhengzhouUniversity(EngineeringScience)Vol29No2:2008-03-26;:2008-04-27:(1963-):,,.,Emai:[e-mail]:1671-6833(2008)02-0041-03王新玲,姚章堂,朱俊涛,吕林(,450001):针对某钢结构厂房,在上部结构主体完工时检测发现钢柱下钢筋混凝土独立基础的混凝土强度不足C10,设计计算了钢结构加固基础的方案,使基础的承载力满足要求,并对施工方法和顺序进行研究探讨.加固后的混凝土独立基础,不仅满足强度要求,而且施工速度快方法简单,对原混凝土扰动最小,达到了预期的目的.该设计及施工方案可供同类工程加固处理参考.:加固设计;钢筋混凝土基础;钢结构加固:TU378.2:A0,,,,,1,,C10,C30.,Du,,.1Fig.1ExistingR.Csinglefoundation1,,,,(),,[1-2].,,,,,,.2.1.11.1.1钢构套强度及稳定性验算2-3.,[3-4].NAn+MxxWnx=NAn+Mx1.05W1x=36.93N/mm2f=215N/mm2,.NxA+mxMxxW1x1-0.8NNEX=36.9N/mm2f=215N/mm2.NyA+!txMxbW1x=34.1N/mm2f=215N/mm2.,.42()20082Fig.2Planeandprofilesofstrengthenedsinglefoundation3Fig.3Planeandprofilesofsteelframeandstiffeningribhtw=840.8!(16∀0+0.5#x+25)235fy=49.28,:bs=80mm;1/15bs,10mm.bt=9440235fy=41.8.,2:bs=150mm;1/15bs,10mm.1.1.2钢构套焊缝设计:hf=8mm,he=0.7hf=5.6mm,4.[3-4]:∃=MIxY0-NA=125.7!1065.53!109!475.6-971000394240,,.1.22-,[5-6],.4Fig.4SteelframeWeldingchart22.1,,C3030mm;75%(),C30600mm,80%,,50mm,M25,.,C30.2.25.243:5Fig.5No.chartofplateinsteelframe(1)∀#;∃%5,;∃%∀#.(2)&∋,∀#,(),∃%,()&∋,&∋∀#.(3)∗,∃~%.(4),hf=8mm.2.3(1).(2),.(3),.(4).(5)[6],[5],.(6),.3,,,.,,,,..:[1],,.[J].,1999,(8-9):80-81.[2].[J].2006,35():142-144.[3]..[M].:,2007.80-100.[4].GB50017-2003[S].:,2003.[5].GB50010-2002[S].:,2005.[6].GB50007-2002[S].:,2005.[7],,.[J].:,2002,34(1):55-58.StrengtheningonRCFoundationforaSteelStructuralFactoryBuildingWANGXin-ling,YAOZhang-tang,ZHUJun-tao,LLin(SchoolofCivilEngineering,ZhengzhouUniversity,Zhengzhou450001,China)Abstract:TheconcretestrengthofR.CsinglefoundationundersteelcolumnissmallerthanC10incaseofthesteelstructuralfactoryisunderconstruction.ThesteelstructureisdesignedtostrengthentheR.Csinglefoundationandthefoundationstrengthissatisfied.Themethodsandordersofconstructionarediscussed.TheR.Csinglefoundationstrengthenedposseenoughstrengthandsimpleconstructingmethodandachieveexpectantpurpose.Thedesignandconstructionschemesareintroducedasareferenceforengineeringofthesamekind.Keywords:strengtheningdesign;RCfoundation;steelstructurestrengthening