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©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1,730020;2,730000;3,730000)[],,,,,,,,[];;;Analysisoncrackofcast2in2placedenseribhollowceilingofaconcreteframeZhengJianjun1,WangDajun2,LiDerong3(1GansuCivilEngineeringResearchInstitute,Lanzhou730020,China;2InstituteofGansuArchitecturalDesignandResearch,Lanzhou730000,China;3GansuConstructionalExpertsCommission,Lanzhou730000,China)Abstract:Accordingtoanactualproject,thecracksofalargespancast2in2placedenseribhollowceilingembeddedbamboocoreboxwereanalyzedsyntheticallyfromthedesignandconstructionaspects,throughthepresentsituationinvestigationanddetection,checkingofbearingcapacity,andthestresscharacteristics.Somedetailedsuggestionsaregiventotheengineerstoavoidthesimilaraccident.Keywords:cast2in2placedenseribhollowceiling;stresscrack;crackdetection;bamboocorebox:,,Email:zjj-555@163.com,(15m),,15m,,,,,13,6,0105g,,1313m,18m,1618m,600,500mm500mm400mm,150m,,3,1,2,,,,,2211C30,651,710;792,87;833,21d,1;34d,228d,,,,,,212,,221211(1):1,245111©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a),(b),,(2):1,2,3,013019mm(1(c))1212122,,011012mm,,,,,,,(2)2212132,500650mm,100mm,,011012mm,,2,21810mG,H,K,M,1618m,,,,,213,,136164515,3519,22153513MPa,229143616,4313,25143517MPa,214,1918mm,PM,21114mm,PG,PM,1,2,,,1,24514,8114mm,5014mm,15mm,231mm,23,,,3600mm,1618m18m,300750,,,83kNm,,220kNmPm,,(),,33,,,,PKPM,11PkNmPmmPmmMxMy1981619816247.922217wmax,xwmax,y0.35820.30300.30.3fmax75106l0300=564(1)1618m,(DBJT2530172005)[2]15m,16@100,12@100,,211©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2),S,,,,,,(3)S,S,,,,,(4),,,,,2,1,2,,,,,515m,,,,,,,:(1),,(),,,(2),,,,(3),,,,[1]CECS175:2004[S].:,2005.[2]DBJT2530172005[S].(71)7500mm,,72,,50mm,50mm,,80%;100mm500mm,6%,2PmmPkNPmmP%PmmPkNPmmP%16700-100134878140912415013592811816849200136998251123667250138078310121537330013917832012750765001449387501323379---,ftk,200mm,,014%4(1)500mm,,,(2),,(3)100mm,150mm,[1].[M].:,1997.[2],.CSI[M].311