混凝土梁板樓蓋中次梁設(shè)計(jì)方法研究
潘立
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(中國建筑科學(xué)研究院建筑結(jié)構(gòu)研究所,北京 100013)[摘要]在混凝土梁板樓蓋設(shè)計(jì)中,目前普遍使用增大樓板厚度和配筋的方法而不再設(shè)次梁,或按簡支設(shè)計(jì)次梁且不控制支座截面裂縫寬度,雖然簡化了結(jié)構(gòu)設(shè)計(jì)與施工,但增大了樓蓋折算厚度與用鋼量,增加了結(jié)構(gòu)自重和成本,且不能確保樓蓋抗裂性能滿足規(guī)范要求,對此進(jìn)行了技術(shù)分析,提出了改進(jìn)設(shè)計(jì)的建議。[關(guān)鍵詞]梁板樓蓋; 次梁; 鉸接;剛接; 樓蓋折算厚度; 裂縫控制; 變形協(xié)調(diào)Research on design method of secondary beams in reinforced concrete beam-slab floorsPan Li(Institute of Building Structures, China Academy of Building Research, Beijing 100013, China)Abstract:In design of reinforced concrete beam-slab floors, no secondary beam with more slab thickness and more steel bars, or hinged secondary beams without crack control on the support sections were widely adopted. Although the design and the construction of floors could be simplified by using these methods, the floor cost will be increased by more weight and more steel, also crack control requirements in design codes will not be satisfied possibly. Based on the technical analysis, some suitable suggestions for this kind of floors were given.Keywords:beam-slab floor; secondary beam; hinged support; rigid support; convert thickness of floors; crack control; deformation compatibility作者簡介:潘立,碩士,教授級高級工程師,一級注冊結(jié)構(gòu)工程師,Email:Panli535482@sohu.com。參考文獻(xiàn)[1] 藍(lán)宗建, 王志遠(yuǎn), 紅莉,等. 鋼筋混凝土主次梁樓板體系中樓板的合理設(shè)計(jì)方法(上)[J]. 建筑科學(xué),2002,18(5).[2] 江莉, 陳道政, 陳政中. 淺談PKPM建模中的次梁輸入[J]. 安徽建筑,2007,14(4).[3] 李唐寧, 秦士洪, 周曉雪, 等. 大跨預(yù)應(yīng)力次梁樓蓋結(jié)構(gòu)體系設(shè)計(jì)[J]. 工業(yè)建筑,1999,29(10).[4] 江峰,李唐寧. 大跨預(yù)應(yīng)力次梁樓蓋結(jié)構(gòu)的邊主梁扭矩簡化計(jì)算[J]. 建筑結(jié)構(gòu),2007,37(7).[5] 張佩軍,朱杰江. 地下車庫樓蓋的設(shè)計(jì)研究[J]. 建筑結(jié)構(gòu),2005,35(4).[6] GB50010—2002 混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范[S]. 北京:中國建筑工業(yè)出版社,2008.[7] 劉軍. 次梁與混凝土邊框梁或外墻整澆結(jié)構(gòu)設(shè)計(jì)方法的探討[J]. 工業(yè)建筑, 2006,36(S1).[8] 賴巖松,袁桂泉,朱玲玲. 淺談不同樓蓋方案對多層標(biāo)準(zhǔn)廠房造價(jià)的影響[J]. 常州工學(xué)院學(xué)報(bào),2007,20(6).[9] 傅光耀, 梁衛(wèi)寧. 鋼平臺次梁受力和變形的試驗(yàn)研究及分析[J]. 建筑結(jié)構(gòu), 2006,36(8).[10] 湯志勇. 關(guān)于“框架邊梁附加扭矩的計(jì)算”問題的討論[J]. 建筑結(jié)構(gòu), 1994,24(9).[11] 張韜. 一種大跨度次梁的內(nèi)力計(jì)算方法[J]. 建筑結(jié)構(gòu), 2007,37(8).
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