钢筋混凝土板式楼梯的非线性有限元分析
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摘要
采用ABAQUS软件建立了某混凝土板式楼梯的精细化三维有限元模型,并对其进行了竖向载荷和水平载荷作用下的非线性分析.结果表明,通过简化计算设计的混凝土板式楼梯完全满足结构的承载力和变形要求;在竖向载荷和水平载荷共同作用下,休息平台处的梯柱形成了短柱,其受力明显大于楼层处的梯柱,钢筋极易进入屈服状态;设计中应加强楼梯结构的抗震计算和分析.
The fine 3Dfinite element model of one reinforced concrete slab stair is built with the software of ABAQUS,and then nonlinear analysis of the slab stair under vertical and horizontal load is carried out.Analysis results show that the reinforced concrete slab stair designed with simplified calculation method completely meets the bearing capacity and deformation requirements of the structure;the stair columns of rest platform under vertical and horizontal load form short columns,the stress in them is evidently bigger than the stress in the stair columns of floor,so reinforcing steel bar will enter the yield condition easily;antiseismic calculation and analysis should be enforced in stair design.
The fine 3Dfinite element model of one reinforced concrete slab stair is built with the software of ABAQUS,and then nonlinear analysis of the slab stair under vertical and horizontal load is carried out.Analysis results show that the reinforced concrete slab stair designed with simplified calculation method completely meets the bearing capacity and deformation requirements of the structure;the stair columns of rest platform under vertical and horizontal load form short columns,the stress in them is evidently bigger than the stress in the stair columns of floor,so reinforcing steel bar will enter the yield condition easily;antiseismic calculation and analysis should be enforced in stair design.
引文
[1]沈靓,柳炳康,张瑜中,等.汶川地震中框架楼梯典型震害分析与有限元计算[J].工程抗震与加固改造,2010,32(4):114-119.(Shen Liang,Liu Bingkang,Zhang Yuzhong,et al.Typical Seismic Damage Analysis and Finite Element Calculation of Stair in Framein Wenchuan Earthquake[J].Earthquake Resistant Engineering and Retrofitting,2010,32(4):114-119.
[2]ABAQUS Analysis User’s Manual[M].USA:ABAQUS Inc.,2004.
[3]于群,叶文超.无粘结预应力混凝土梁非线性有限元分析[J].沈阳大学学报:自然科学版,2012,24(3):75-77,86.(Yu Qun,Ye Wenchao.Nonlinear Finite Element Analysis of Unbonded Prestressed Concrete Beam[J].Journal of Shenyang University:Natural Science,2012,24(3):75-77,86.)
[4]石亦平,周玉蓉.ABAQUS有限元分析实例详解[M].北京:机械工业出版社,2006:28-62.(Shi Yiping,Zhou Yurong.ABAQUS Finite Element Example Explanation[M].Beijing:Machinery Industry Press,2006:28-62.)
[5]中华人民共和国住房和城乡建设部.GB 50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.(Ministry of Housing and Urban-Rural Development.GB50009—2010Code for Design of Concrete Structures[S].Beijing:China Architecture&Building Press,2010.)
[6]庄茁,张帆,岑松.ABAQUS非线性有限元分析与实例[M].北京:科学出版社,2005:239-243.(Zhuang Zhuo,Zhang Fan,Cen Song.ABAQUS Nonlinear Finite Element Analysis and Instance[M].Beijing:Science Press,2005:239-243.)
[7]中华人民共和国住房和城乡建设部.GB 50009—2012建筑结构荷载规范[S].北京:中国建筑工业出版社,2012:14-16.(Ministry of Housing and Urban-Rural Development.GB50009—2012 Load Code for the Design of Building Structures[S].Beijing:China Architecture&Building Press,2012:14-16.)
[8]中华人民共和国建设部.GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010:46-47.(Ministry of Construction.Code for Seismic Design of Buildings GB 50011—2010[S].Beijing:China Building Industry Press,2010:46-47.)
[9]吴小宾,冯远,熊耀清,等.带楼梯框架结构静力推覆分析及弹塑性性能研究[J].建筑结构,2011,41(3):31-35.(Wu Xiaobin,Feng Yuan,Xiong Yaoqing,et al.Pushover Analysis and Research of Elastic-plastic Performance for Frame Structure with Staircase[J].Building Structure,2011,41(3):31-35.)
[2]ABAQUS Analysis User’s Manual[M].USA:ABAQUS Inc.,2004.
[3]于群,叶文超.无粘结预应力混凝土梁非线性有限元分析[J].沈阳大学学报:自然科学版,2012,24(3):75-77,86.(Yu Qun,Ye Wenchao.Nonlinear Finite Element Analysis of Unbonded Prestressed Concrete Beam[J].Journal of Shenyang University:Natural Science,2012,24(3):75-77,86.)
[4]石亦平,周玉蓉.ABAQUS有限元分析实例详解[M].北京:机械工业出版社,2006:28-62.(Shi Yiping,Zhou Yurong.ABAQUS Finite Element Example Explanation[M].Beijing:Machinery Industry Press,2006:28-62.)
[5]中华人民共和国住房和城乡建设部.GB 50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.(Ministry of Housing and Urban-Rural Development.GB50009—2010Code for Design of Concrete Structures[S].Beijing:China Architecture&Building Press,2010.)
[6]庄茁,张帆,岑松.ABAQUS非线性有限元分析与实例[M].北京:科学出版社,2005:239-243.(Zhuang Zhuo,Zhang Fan,Cen Song.ABAQUS Nonlinear Finite Element Analysis and Instance[M].Beijing:Science Press,2005:239-243.)
[7]中华人民共和国住房和城乡建设部.GB 50009—2012建筑结构荷载规范[S].北京:中国建筑工业出版社,2012:14-16.(Ministry of Housing and Urban-Rural Development.GB50009—2012 Load Code for the Design of Building Structures[S].Beijing:China Architecture&Building Press,2012:14-16.)
[8]中华人民共和国建设部.GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010:46-47.(Ministry of Construction.Code for Seismic Design of Buildings GB 50011—2010[S].Beijing:China Building Industry Press,2010:46-47.)
[9]吴小宾,冯远,熊耀清,等.带楼梯框架结构静力推覆分析及弹塑性性能研究[J].建筑结构,2011,41(3):31-35.(Wu Xiaobin,Feng Yuan,Xiong Yaoqing,et al.Pushover Analysis and Research of Elastic-plastic Performance for Frame Structure with Staircase[J].Building Structure,2011,41(3):31-35.)
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