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董攀1，徐其功2，蔡輝3

（1 廣東省建科建筑設(shè)計(jì)院，廣州 510500；2 廣東省建筑科學(xué)研究院，廣州 510500；3 華南理工大學(xué)土木與交通學(xué)院，廣州 510500）

 

［摘要］以1個(gè)混凝土抗拔灌注樁為例，分別按《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（GB 50010—2010）與《水運(yùn)工程混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（JTS 151—2011）的裂縫寬度計(jì)算公式，在軸向拉力和配筋率變化的情況下，計(jì)算該樁的裂縫寬度，并對(duì)計(jì)算結(jié)果進(jìn)行對(duì)比分析。結(jié)果表明，水規(guī)計(jì)算的裂縫寬度較混規(guī)計(jì)算的裂縫寬度大68%～168%。結(jié)合兩規(guī)范不同的裂縫寬度限值進(jìn)行比較，得出對(duì)于圓形截面構(gòu)件，水規(guī)對(duì)裂縫寬度控制要求較混規(guī)嚴(yán)格。

［關(guān)鍵詞］鋼筋混凝土灌注樁；圓形截面；裂縫寬度；軸向拉力；配筋率

中圖分類號(hào)：TU375      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2013)10-0094-03

 

Calculation comparison on crack width for RC round section members of two codes

Dong Pan1, Xu Qigong2, Cai Hui3

（1 Jianke Architectural Design Institute of Guangdong Province, Guangzhou 510500, China; 2 Guangdong Provincial Academy of Building Research, Guangzhou 510500, China; 3 College of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510500, China）

 

Abstract: Crack width of a reinforced concrete uplift bored pile was calculated and compared in different cases of axial tension and reinforcement ratio, which was based on the calculation formula from Code for design of concrete structures(GB 50010—2010) and Design code for concrete structures of port and waterway engineering(JTS 151—2011) separately. The results show that the crack width calculated by Design code for concrete structures of port and waterway engineering are 68%～168% more than that of Code for design of concrete structures . Different limited values of crack width between two codes were compared, which indicates that calculation formula of crack width of round section members of Design code for concrete structures of port and waterway engineering is more strict than that of Code for design of concrete structures.

Keywords: reinforced concrete uplift bored pile; round section; crack width; axial tension; reinforcement ratio

作者簡(jiǎn)介：董攀，碩士，工程師，Email:dongpan-828@sohu.com。

 

參考文獻(xiàn)

［1］魏巍巍，貢金鑫，李龍．圓形截面鋼筋混凝土構(gòu)件裂縫寬度的計(jì)算［J］．水利水運(yùn)工程學(xué)報(bào)，2008(3): 47-51．

［2］GB 50010—2010 混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］．北京:中國(guó)建筑工業(yè)出版社，2011．

［3］JTS 151—2011 水運(yùn)工程混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］．北京：中國(guó)建筑工業(yè)出版社，2011．

［4］JGJ 94—2008 建筑樁基技術(shù)規(guī)范［S］．北京：中國(guó)建筑工業(yè)出版社，2008．

［5］王彥敏．中國(guó)現(xiàn)行鋼結(jié)構(gòu)規(guī)范（規(guī)程）與美國(guó)ASD規(guī)范的主要限值［J］．建筑結(jié)構(gòu)，1999,29(6)：14-15．

［6］史志華，貢金鑫，李云貴，等．中美歐房屋建筑鋼筋混凝土基本構(gòu)件設(shè)計(jì)安全度比較［J］．建筑結(jié)構(gòu)，2012，42（10）：87-97．