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预应力混凝土四边简支双向叠合板的设计方法.pdf

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第 23卷 第4期 建筑科学与工程学报 Vo1.23 No.4 20O6年 l2月 JournalofArchitectureandCivilEngineering Dec.2006 文章编号 :1673—2049(2006)04—0054—04 预应力混凝土四边简支双向 叠合板的设计方法 周绪红 ,张微伟 ,吴方伯 ,李定乾 (1.兰州大学 土木工程与力学学院,甘肃 兰州 730000;2.湖南大学 土木工程学院,湖南 长沙 410082) 摘要:对预应力混凝土双向叠合板进行了抗弯刚度分析,基于弹性薄板原理,按照正交各向异性板 推导四边简支单向预应力矩形板的相应计算公式,通过 自编程序求解出双向叠合板在四边简支边 界条件下的计算系数,并编制成与普通钢筋混凝土双向板相对应的表格,为其进一步推广应用奠定 基础。通过与现浇四边简支双向板弹性计算系数的比较可知,在预应力双向叠合板的设计中,应将 预制构件沿短跨方 向布置才能更好地发挥其节省钢材的优势。 关键词:预应力;双 向叠合板;四边简支;弹性薄板理论 中图分类号:TU378.5 文献标志码:A DesignM ethodofPrestressedConcreteSimplySupportedon FourSidesofTwo-W ayCompositeSlab ZHOU Xu—hong ,ZHANG Wei—wei,WU Fang—bo。,LIDing—qian (1.SchoolofCivilEngineeringandMechanics,LanzhouUniversity,Lanzhou730000,Gansu,China 2.SchoolofCivilEngineering,HunanUniversity,Changsha410082,Hunan,China) Abstract:Theflexuralrigidityofprestressedconcretetwo—waycompositeslabwasanalyzed. Basedonthetheoryofelasticthinplates,accordingtotheorthotropicplate’Sperpendicularity, thecorresponding calculation formulasofrectangularunidirectionalprestressed slab simply supportedon foursideswerededuced.M oreover,with theprogram written byauthors,the coefficientsoftwo—way composite slab under border simply supported on four sides were obtained,authorsmadeaform correspondencetothecompositionslab.Thus,thisestablisheda stableconditionforthefurtherapplianceofsuch composition slab.Comparingwith theelastic coefficientofcast—in—sitetwo—wayslabsimplysupportedonfoursides,itshowsthatinthedesign Ofprestressedtwo—waycompositeslab,prefabricatedcomponentsalongstepshortshouldbefixed up,whichcanmakefulluseofitsadvantagesofsavingsteelproducts. Keywords:prestress;two—waycompositeslab;simplysupportedonfoursides;theor
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