小跨高比强化配筋连梁的抗震性能
|
摘要
强化配筋连梁是指采用HRB400及以上钢筋、加密加粗腰筋、加粗箍筋的连梁。期望通过腰筋和箍筋形成的2层或更多层的高强钢筋网片来承受剪力,提高其抗震性能,施工较为方便,适用于小跨高比连梁。利用非线性有限元方法,在已完成普通配筋小跨高比连梁抗震性能试验的基础上,研究了跨高比为1.25的不同配筋形式连梁的抗震性能。研究表明:强化配筋连梁的骨架曲线出现2个峰值,峰值荷载为普通配筋连梁的1.37倍,其荷载下降速率约为普通配筋连梁的39.42%,具有较高的承载力。强化配筋连梁的峰值位移是集中对角斜筋、交叉斜筋和对角暗撑配筋连梁的三倍多,具有较强的变形能力。最后,建议采用深梁的方法计算强化配筋连梁的受剪承载力。
Coupling beam with strengthened reinforcement is reinforced by HRB400 or higher strength bar, densified and strengthened crude side bar, and strengthened stirrup. The side bar and the stirrup can form two or more layers high-strength steel grid to bear shear and improve the seismic behavior, and the construction is more convenient, which is applicable for small span-to-depth ratio coupling beam. Based on the existing experimental work on the seismic behavior of the conventional coupling beam with a small span-depth ratio, the nonlinear finite element method was used to study the seismic behavior of the coupling beams with a span-to-depth ratio of 1.25 and various reinforcement details. It is indicated that the coupling beam with strengthened reinforcement has a higher bearing capacity, because there are two peaks on its skeleton curve. Its decline rate of load is approximately 39.42% of that of the conventional coupling beam, while its peak load is 1.37 times. The coupling beam with strengthened reinforcement has a good deformation capability, because the peak displacement is 3 times as large as that of the coupling beam with the concentrated diagonal reinforcement, crossing diagonal reinforcement or diagonal brace reinforcement. It is recommended that the calculation method for the deep beam should be used to calculate shear strength of the coupling beam with strengthened reinforcement.
Coupling beam with strengthened reinforcement is reinforced by HRB400 or higher strength bar, densified and strengthened crude side bar, and strengthened stirrup. The side bar and the stirrup can form two or more layers high-strength steel grid to bear shear and improve the seismic behavior, and the construction is more convenient, which is applicable for small span-to-depth ratio coupling beam. Based on the existing experimental work on the seismic behavior of the conventional coupling beam with a small span-depth ratio, the nonlinear finite element method was used to study the seismic behavior of the coupling beams with a span-to-depth ratio of 1.25 and various reinforcement details. It is indicated that the coupling beam with strengthened reinforcement has a higher bearing capacity, because there are two peaks on its skeleton curve. Its decline rate of load is approximately 39.42% of that of the conventional coupling beam, while its peak load is 1.37 times. The coupling beam with strengthened reinforcement has a good deformation capability, because the peak displacement is 3 times as large as that of the coupling beam with the concentrated diagonal reinforcement, crossing diagonal reinforcement or diagonal brace reinforcement. It is recommended that the calculation method for the deep beam should be used to calculate shear strength of the coupling beam with strengthened reinforcement.
引文
[1] PAULAY T,SANTHAKUMAR AR.Ductile behavior of coupled shear walls[J].Journal of the Structural Division,1976,102(1):93-108.
[2] GB50010-2010 混凝土结构设计规范(2015年版)[S].北京:中国建筑工业出版社,2015.GB50010-2010 Code for design of concrete structures (2015 Edition)[S].Beijing:China Building Industry Press,2015.(in Chinese)
[3] ADEBAR P,HINDI R,GONZALEZ E.Seismic behavior of a full-scale diagonally reinforced slender coupling beam[C].Department of Civil Engineering,The University of British Columbia,Vancouver,Canada,2001.
[4] 皮天祥,傅剑平,白绍良,等.小跨高比对角斜筋连梁抗震性能的试验[J].重庆大学学报,2009,32(9):1086-1092.PI Tianxiang,FU Jianping,BAI Shaoliang,et al.Experiment research on aseismatic capability of diagonally crossing reinforced coupling beams with the small ratio of span to depth[J].Journal of Chongqing University,2009,32(9):1086-1092.(in Chinese)
[5] 傅剑平,皮天祥,韦峰,等.钢筋混凝土联肢墙小跨高比复合斜筋连梁抗震性能试验研究[J].土木工程学报,2011,44(2):57-64.FU Jianping,PI Tianxiang,WEI Feng,et al.Experimental study on seismic behaviors of small-aspect-ratio coupling beams in RC structural walls proportioned with combined slanting reinforcements[J].China Civil Engineering Journal,2011,44(2):57-64.(in Chinese)
[6] 张敬书,柳斌,柳涛.提高小跨高比连梁抗震性能的设计方法[J].结构工程师,2017,33(5):13-20.ZHANG Jingshu,LIU Bin,LIU Tao.Design methods to improve seismic performance of coupling beams with a small span-to-depth ratio[J].Structural Engineers,2017,33(5):13-20.(in Chinese)
[7] 叶艳霞,孙向阳,赵应许,等.小跨高比纤维增强混凝土连梁抗震性能试验研究[J].建筑结构,2014(14):13-16.YE Yanxia,SUN Xiangyang,ZHAO Yingxu,et al.Experimental study on seismic performance small span-to-depth ratio coupling beams with fiber reinforced concrete[J].Building Structure,2014(14):13-16.(in Chinese)
[8] LUBLINER J ,OLIVER J,OLLER S,et al.A plastic-damage model for concrete[J].International Journal of Solids and Structures,1989,25 (3):229 326.
[9] LEE J,FENVES GL.Plastic-damage model for cyclic loading of concrete structures[J].Journal of Engineering Mechanics,1998,124 (8):892-900.
[10] 张劲,王庆扬,胡守营,等.ABAQUS混凝土损伤塑性模型参数验证[J].建筑结构,2008(8):127-130.ZHANG Jin,Wang Qingyang,HU Shouying,et al.Parameters verification of concrete damaged plastic model of ABAQUS[J].Building Structure,2008(8):127-130.(in Chinese)
[11] 曲哲,叶列平.基于有效累积滞回耗能的钢筋混凝土构件承载力退化模型[J].工程力学,2011,28(6):45-51.QU Zhe,YE Lieping.Strength deterioration model based on effective hysteretic energy dissipation for RC members under cyclic loading[J].Engineering Mechanics,2011,28(6):45-51.(in Chinese)
[12] 梁兴文,邢朋涛,刘贞珍,等.小跨高比纤维增强混凝土连梁抗震性能试验及受剪承载力研究[J].建筑结构学报,2016,37(8):48-57.LIANG Xingwen,XING Pengtao,LIU Zhenzhen,et al.Experimental study on seismic behavior and shear capacity of FRC coupling beams with small span-to-depth ratio[J].Journal of Building Structures,2016,37(8):48-57.(in Chinese)
[13] 杨忠.小跨高比超高韧性水泥基复合材料连梁抗震性能试验研究[J].建筑结构,2016(15):74-78.YANG Zhong.Experimental study on seismic performance of coupling beams with small span-depth ratio and ultra high toughness engineered cementitious composite[J].Building Structure,2016(15):74-78.(in Chinese)
[14] 张超,陈向上,于德湖.小跨高比带楼板半通缝连梁抗震性能有限元分析[J].世界地震工程,2018,34(1):51-62.ZHANG Chao,CHEN Xiangshang,YU Dehu.Finite element analysis on seismic behavior of small span-depth ratio semi seam coupling beam with slab[J].World Earthquake Engineering,2018,34(1):51-62.(in Chinese)
[15] SEO SY,YUN HD,CHUN YS.Hysteretic behavior of conventionally reinforced concrete coupling beams in reinforced concrete coupled shear wall [J].International Journal of Concrete Structures & Materials,2017,11(4):599-616.
[2] GB50010-2010 混凝土结构设计规范(2015年版)[S].北京:中国建筑工业出版社,2015.GB50010-2010 Code for design of concrete structures (2015 Edition)[S].Beijing:China Building Industry Press,2015.(in Chinese)
[3] ADEBAR P,HINDI R,GONZALEZ E.Seismic behavior of a full-scale diagonally reinforced slender coupling beam[C].Department of Civil Engineering,The University of British Columbia,Vancouver,Canada,2001.
[4] 皮天祥,傅剑平,白绍良,等.小跨高比对角斜筋连梁抗震性能的试验[J].重庆大学学报,2009,32(9):1086-1092.PI Tianxiang,FU Jianping,BAI Shaoliang,et al.Experiment research on aseismatic capability of diagonally crossing reinforced coupling beams with the small ratio of span to depth[J].Journal of Chongqing University,2009,32(9):1086-1092.(in Chinese)
[5] 傅剑平,皮天祥,韦峰,等.钢筋混凝土联肢墙小跨高比复合斜筋连梁抗震性能试验研究[J].土木工程学报,2011,44(2):57-64.FU Jianping,PI Tianxiang,WEI Feng,et al.Experimental study on seismic behaviors of small-aspect-ratio coupling beams in RC structural walls proportioned with combined slanting reinforcements[J].China Civil Engineering Journal,2011,44(2):57-64.(in Chinese)
[6] 张敬书,柳斌,柳涛.提高小跨高比连梁抗震性能的设计方法[J].结构工程师,2017,33(5):13-20.ZHANG Jingshu,LIU Bin,LIU Tao.Design methods to improve seismic performance of coupling beams with a small span-to-depth ratio[J].Structural Engineers,2017,33(5):13-20.(in Chinese)
[7] 叶艳霞,孙向阳,赵应许,等.小跨高比纤维增强混凝土连梁抗震性能试验研究[J].建筑结构,2014(14):13-16.YE Yanxia,SUN Xiangyang,ZHAO Yingxu,et al.Experimental study on seismic performance small span-to-depth ratio coupling beams with fiber reinforced concrete[J].Building Structure,2014(14):13-16.(in Chinese)
[8] LUBLINER J ,OLIVER J,OLLER S,et al.A plastic-damage model for concrete[J].International Journal of Solids and Structures,1989,25 (3):229 326.
[9] LEE J,FENVES GL.Plastic-damage model for cyclic loading of concrete structures[J].Journal of Engineering Mechanics,1998,124 (8):892-900.
[10] 张劲,王庆扬,胡守营,等.ABAQUS混凝土损伤塑性模型参数验证[J].建筑结构,2008(8):127-130.ZHANG Jin,Wang Qingyang,HU Shouying,et al.Parameters verification of concrete damaged plastic model of ABAQUS[J].Building Structure,2008(8):127-130.(in Chinese)
[11] 曲哲,叶列平.基于有效累积滞回耗能的钢筋混凝土构件承载力退化模型[J].工程力学,2011,28(6):45-51.QU Zhe,YE Lieping.Strength deterioration model based on effective hysteretic energy dissipation for RC members under cyclic loading[J].Engineering Mechanics,2011,28(6):45-51.(in Chinese)
[12] 梁兴文,邢朋涛,刘贞珍,等.小跨高比纤维增强混凝土连梁抗震性能试验及受剪承载力研究[J].建筑结构学报,2016,37(8):48-57.LIANG Xingwen,XING Pengtao,LIU Zhenzhen,et al.Experimental study on seismic behavior and shear capacity of FRC coupling beams with small span-to-depth ratio[J].Journal of Building Structures,2016,37(8):48-57.(in Chinese)
[13] 杨忠.小跨高比超高韧性水泥基复合材料连梁抗震性能试验研究[J].建筑结构,2016(15):74-78.YANG Zhong.Experimental study on seismic performance of coupling beams with small span-depth ratio and ultra high toughness engineered cementitious composite[J].Building Structure,2016(15):74-78.(in Chinese)
[14] 张超,陈向上,于德湖.小跨高比带楼板半通缝连梁抗震性能有限元分析[J].世界地震工程,2018,34(1):51-62.ZHANG Chao,CHEN Xiangshang,YU Dehu.Finite element analysis on seismic behavior of small span-depth ratio semi seam coupling beam with slab[J].World Earthquake Engineering,2018,34(1):51-62.(in Chinese)
[15] SEO SY,YUN HD,CHUN YS.Hysteretic behavior of conventionally reinforced concrete coupling beams in reinforced concrete coupled shear wall [J].International Journal of Concrete Structures & Materials,2017,11(4):599-616.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |