- 摘 要
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（東南大學(xué)混凝土及預(yù)應(yīng)力混凝土結(jié)構(gòu)教育部重點(diǎn)實(shí)驗(yàn)室，南京 210096）
［摘要］首先對《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（GB50010—2002）深受彎構(gòu)件的抗剪設(shè)計(jì)進(jìn)行了探討，指出了其主要不足之處。改進(jìn)的拉-壓桿模型的提出有效地克服了上述問題，其不僅使預(yù)應(yīng)力及非預(yù)應(yīng)力深受彎構(gòu)件的抗剪設(shè)計(jì)得到了協(xié)調(diào)，同時將壓桿劈裂破壞、壓桿或節(jié)點(diǎn)區(qū)壓潰和拉桿屈服受彎破壞三種主要破壞模式統(tǒng)一了起來。引用文獻(xiàn)中39根預(yù)應(yīng)力和71根非預(yù)應(yīng)力深受彎構(gòu)件的試驗(yàn)數(shù)據(jù)對改進(jìn)的拉壓桿模型進(jìn)行了驗(yàn)證,表明其預(yù)測結(jié)果協(xié)調(diào)、精確、連續(xù)而又偏于安全。
［關(guān)鍵詞］深受彎構(gòu)件；受剪承載力；改進(jìn)拉-壓桿模型
Consistent method to predict shear capacity of deep flexural members
Wang Guolin，Meng Shaoping，Huang Shiping(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast Uni., Nanjing 210096,China)
Abstract:Discussions are firstly carried out about shear design provisions for deep flexural members of -Code for design of concrete structures(GB50010—2002), and some problems are brought forward, which can be overcome by modified strut-and-tie model (MSTM). The MSTM not only makes the shear design of both prestressed and reinforced deep flexural concrete members consistent, but also unifies three primary modes of failure, that is, diagonal splitting of struts, crushing of struts or nodal zones and yielding of ties. A comparison of 110 beams, of which
39 beams are prestressed flexural members and the others are reinforced members, shows that the predictions are unified, accurate, consistent and conservative.
Keywords:deep flexural member; shear capacity; modified strut-and-tie model
作者簡介：王國林，博士研究生，Email:felixwseu@163.com。
參考文獻(xiàn)
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