无筋砌体抗震墙的弯剪破坏及等效剪跨比研究
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摘要
研究无筋砌体抗震在轴力及面内水平作用下同时产生弯曲、剪切开裂破坏下的界限剪跨比。首先阐述弯剪临界破坏、界限剪跨比及异形截面墙体等效剪跨比的概念,提出单一材料的无筋砌体墙界限剪跨比的有限元弹性分析推断法;在砖砌体结构通常层数及材料范围内,计算矩形及异形截面无筋砖墙的界限剪跨比。研究表明,无筋砌体墙的界限剪跨比一般为0.5～1.2,受材料强度影响小;界限等效剪跨比有效地消除了截面形式影响。
Boundary shear span ratio between bend and shear breakage of masonry seismic wall is analyzed under axial and in-plane horizontal action.The concept of boundary of bend and shear cracking,equivalent shear span ratio of abnormal section and boundary shear span ratio are set forth firstly,followed by a detailed dissertation of the analysis principle and elastic deduction of boundary shear span ratio of plain masonry wall by means of FEM.Furthermore,boundary shear span ratio of plain brick wall with rectangular and abnormal section is calculated in the range of general storey number,height and material strength.The analyses indicate that boundary shear span ratio of plain brick wall is within 0.5~1.2 and the influence of masonry strength is trifling;boundary equivalent shear span ratio eliminates influences of section types effectively.
Boundary shear span ratio between bend and shear breakage of masonry seismic wall is analyzed under axial and in-plane horizontal action.The concept of boundary of bend and shear cracking,equivalent shear span ratio of abnormal section and boundary shear span ratio are set forth firstly,followed by a detailed dissertation of the analysis principle and elastic deduction of boundary shear span ratio of plain masonry wall by means of FEM.Furthermore,boundary shear span ratio of plain brick wall with rectangular and abnormal section is calculated in the range of general storey number,height and material strength.The analyses indicate that boundary shear span ratio of plain brick wall is within 0.5~1.2 and the influence of masonry strength is trifling;boundary equivalent shear span ratio eliminates influences of section types effectively.
引文
[1]中国建筑科学研究院.2008年汶川地震建筑震害图片集[M].北京:中国建筑工业出版社,2008
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[3]TMS402-05/ACI530-05/ASCE5-05Building code requirements for masonry structures[S].Boulder:The Masonry Standards Joint Committee,2005
[4]徐秉业,刘信声.应用弹塑性力学[M].北京:清华大学出版社,2008:506-516
[5]程文瀼,康谷贻,颜德姮.混凝土结构设计原理[M].北京:中国建筑工业出版社,2003
[2]张文芳.砌体墙的面内受弯损坏形态及其抗震优势实例剖析[J].土木工程学报,2010,43(增1):130-135(Zhang Wenfang.Researches on in-plane flexural destruction modes and earthquake resistant advantages by way of representative examples[J].China CivilEngineering Journal,2010,41(S1):130-135(in Chinese))
[3]TMS402-05/ACI530-05/ASCE5-05Building code requirements for masonry structures[S].Boulder:The Masonry Standards Joint Committee,2005
[4]徐秉业,刘信声.应用弹塑性力学[M].北京:清华大学出版社,2008:506-516
[5]程文瀼,康谷贻,颜德姮.混凝土结构设计原理[M].北京:中国建筑工业出版社,2003
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