不等肢配箍矩形截面框架柱双向受剪承载力
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摘要
通过5根无腹筋和7根有腹筋矩形截面钢筋混凝土框架柱试验,研究低周往复斜向水平荷载作用下不等肢配箍框架柱的双向受剪的机理和计算方法.通过试验分析了无腹筋混凝土框架柱受剪承载力的双向相关性,提出了对混凝土项修正的双向受剪承载力理论.结果表明,无腹筋矩形截面框架柱双向受剪承载力相关关系可以近似用椭圆描述.有腹筋框架柱的受剪承载力中轴压力和两向的箍筋单独作用.根据分析结果,建立了低周往复荷载作用下不等肢配箍矩形截面框架柱的双向受剪承载力计算公式.与试验值比较,双向受剪承载力计算公式用于设计是偏于安全的.
The mechanism and calculation method of bilateral shear strength of rectangular frame columns with different stirrup areas on two principal axes under low cyclic oblique horizontal loads were investigated based on a test of 5 rectangular frame columns without stirrup and 7 rectangular frame columns with different stirrup areas on two principal axes.According to the test,the bilateral correlation of shear strength of rectangular frame columns without stirrup was analyzed,and an amendatory theory of shear strength in two directions on concrete was put forward. Results indicate that the relationship of shear strength between two principal axes of rectangular frame columns without stirrup can be approximately described as ellipse.The axial force is independent of the action of stirrups on two principal axes in rectangular frame columns with different stirrups. According to analytical results,a calculation formula of bilateral shear strength of rectangular frame columns with different stirrup areas on two principal axes under low cyclic obliquehorizontal loads was presented,which is safe when compared with test results.
The mechanism and calculation method of bilateral shear strength of rectangular frame columns with different stirrup areas on two principal axes under low cyclic oblique horizontal loads were investigated based on a test of 5 rectangular frame columns without stirrup and 7 rectangular frame columns with different stirrup areas on two principal axes.According to the test,the bilateral correlation of shear strength of rectangular frame columns without stirrup was analyzed,and an amendatory theory of shear strength in two directions on concrete was put forward. Results indicate that the relationship of shear strength between two principal axes of rectangular frame columns without stirrup can be approximately described as ellipse.The axial force is independent of the action of stirrups on two principal axes in rectangular frame columns with different stirrups. According to analytical results,a calculation formula of bilateral shear strength of rectangular frame columns with different stirrup areas on two principal axes under low cyclic obliquehorizontal loads was presented,which is safe when compared with test results.
引文
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[10]徐有邻,周氏.混凝土结构设计规范理解与应用[M].北京:中国建筑工业出版社,2005.Xu Youlin,Zhou Shi.Comprehension and Application forCode for Design of Concrete Structures[M].Beijing:China Architectural Industry Press,2005(in Chinese).
[2]Maruyama K,Ramirez H,Jirsa J O.Short RC columnsunder bilateral load histories[J].Journal of StructuralEngineering,1984,110(1):120-137.
[3]戎贤,王铁成,康谷贻.钢筋混凝土框架柱双向受剪承载力分析[J].地震工程与工程振动,2002,22(5):46-52.Rong Xian,Wang Tiecheng,Kang Guyi.Study on two-way shear strength of columns in RC frames[J].Earth-quake Engineering and Engineering Vibration,2002,22(5):46-52(in Chinese).
[4]GB50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.GB50010—2002 Code for Design of Concrete Structures[S].Beijing:China Architectural Industry Press,2002(in Chinese).
[5]蓝宗建,梁书亭,孟少平.混凝土结构设计原理[M].-南京:东南大学出版社,2002.Lan Zongjian,Liang Shuting,Meng Shaoping.DesignPrinciples of Concrete Structures[M].Nanjing:Southeast University Press,2002(in Chinese).
[6]王铁成,郭永亮,张洪波.两向不等肢配箍矩形截面柱双向受剪试验分析[J].天津大学学报,2005,38(7):620-624.Wang Tiecheng,Guo Yongliang,Zhang Hongbo.Shearstrength of column with different areas stirrups in twoprincipal directions under skewed horizontal loads[J].Journal of Tianjin University,2005,38(7):620-624(in Chinese).
[7]中国建筑科学研究院.混凝土结构设计[M].北京:中国建筑工业出版社,2003.China Academy of Buildinq Research.Design of ConcreteStructures[M].Beijing:China Architectural IndustryPress,2003(in Chinese).
[8]傅剑平,张川,钟树生.钢筋混凝土框架柱双向受剪承载力计算方法探讨[J].重庆建筑大学学报,2000,22(5):1-3.Fu Jianping,Zhang Chuan,Zhong Shusheng.Analyticalmethod on bi-directional shearing capacity of RC framedcolumns[J].Journal of Chongqing Jianzhu University,2000,22(5):1-3(in Chinese).
[9]叶列平.混凝土结构[M].北京:清华大学出版社,2002.Ye Lieping.Concrete Structure[M].Beijing:TsinghuaUniversity Press,2002(in Chinese).
[10]徐有邻,周氏.混凝土结构设计规范理解与应用[M].北京:中国建筑工业出版社,2005.Xu Youlin,Zhou Shi.Comprehension and Application forCode for Design of Concrete Structures[M].Beijing:China Architectural Industry Press,2005(in Chinese).
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