中空超高性能混凝土短柱轴心受压试验研究
|
摘要
为研究不同壁厚的中空超高性能混凝土(UHPC)短柱在轴向压力下的变形和承载能力,制作4组不同壁厚的中空UHPC短柱试件,进行轴心受压试验,研究壁厚对试件裂缝发展、竖向变形、横向变形及承载力的影响。结果表明:初始裂缝均出现在荷载达到极限承载力的70%后,裂缝随荷载的增加发展不明显,破坏瞬间迅速开展;试件破坏前基本处于弹性阶段,纵向应变随荷载增加线性增大;壁厚较小时,试件存在端部破坏和板壁屈曲的现象;随着壁厚增大,试件的端部破坏和板壁屈曲情况得到改善;试件的宽厚比<5时,承载力试验值和计算值吻合较好,宽厚比≥5时,计算承载力时应考虑0.8的修正系数。
To investigate the deformation and bearing capacity of hollow ultra high performance concrete(UHPC)short columns with different wall thicknesses under axial compression,four groups of hollow UHPC short columns with different wall thicknesses were fabricated and tested under axial compression.Meanwhile the effects of wall thickness on crack development,vertical deformation,transverse deformation,and bearing capacity were studied.The results show that the initial cracks occur after loading 70% ultimate bearing capacity,and the development of cracks is not obvious with the increase of loading,but the cracks develop rapidly at the moment of failure.The specimens are basically in the elastic stage before failure,and longitudinal strain increases linearly with the increase of loading.When the wall thickness is small,there are phenomena of end failure and plate wall buckling.With the increase of wall thickness,the phenomena of end failure and plate wall buckling of the specimens will ameliorate.When the width-thickness ratio is less than 5,the experimental values are well in agreement with the computational ones.When the width-thickness ratio is more than 5,the correction factor of 0.8 should be considered in calculating bearing capacity.
To investigate the deformation and bearing capacity of hollow ultra high performance concrete(UHPC)short columns with different wall thicknesses under axial compression,four groups of hollow UHPC short columns with different wall thicknesses were fabricated and tested under axial compression.Meanwhile the effects of wall thickness on crack development,vertical deformation,transverse deformation,and bearing capacity were studied.The results show that the initial cracks occur after loading 70% ultimate bearing capacity,and the development of cracks is not obvious with the increase of loading,but the cracks develop rapidly at the moment of failure.The specimens are basically in the elastic stage before failure,and longitudinal strain increases linearly with the increase of loading.When the wall thickness is small,there are phenomena of end failure and plate wall buckling.With the increase of wall thickness,the phenomena of end failure and plate wall buckling of the specimens will ameliorate.When the width-thickness ratio is less than 5,the experimental values are well in agreement with the computational ones.When the width-thickness ratio is more than 5,the correction factor of 0.8 should be considered in calculating bearing capacity.
引文
[1]杜任远,黄卿维,陈宝春.活性粉末混凝土桥梁应用与研究[J].世界桥梁,2013,41(1):69-74.(DU Ren-yuan,HUANG Qing-wei,CHEN Baochun.Application and Study of Reactive Powder Concrete to Bridge Engineering[J].World Bridges,2013,41(1):69-74.in Chinese)
[2]刘超,马汝杰,王俊颜,等.超高性能混凝土薄层加固法在槽形梁桥中的应用[J].桥梁建设,2017,47(5):112-116.(LIU Chao,MA Ru-jie,WANG Jun-yan,et al.Application of Reinforcement Method of UHPC Thin Layers to Through Beam Bridges[J].Bridge Construction,2017,47(5):112-116.in Chinese)
[3]季文玉,罗华,杨国静.钢管活性粉末混凝土长柱轴压性能试验研究[J].中国铁道科学,2014,35(1):28-33.(JI Wen-yu,LUO Hua,YANG Guo-jing.Experimental Research on Mechanical Behavior of Axially Loaded RPC Filled Circular Steel Tube Slender Column[J].China Railway Science,2014,35(1):28-33.in Chinese)
[4]杨克家,孙林柱,李桅,等.RPC中空受压构件截面设计及受力性能研究[J].工程力学,2016,33(5):166-175.(YANG Ke-jia,SUN Lin-zhu,LI Wei,et al.Cross Section Design and Mechanical Performance Investigation into RPC Hollow Members[J].Engineering Mechanics,2016,33(5):166-175.in Chinese)
[5]唐昌辉,刘冬明.活性粉末混凝土柱轴心受压试验研究[J].中国科技论文,2016,11(1):7-11.(TANG Chang-hui,LIU Dong-ming.Experimental Study on Reactive Powder Concrete Columns Under U-niaxial Compression[J].China Science Paper,2016,11(1):7-11.in Chinese)
[6]唐昌辉,欧阳鹏.圆中空夹层钢管RPC轴心受压短柱的试验研究[J].铁道科学与工程学报,2016,13(12):2 427-2 433.(TANG Chang-hui,OUYANG Peng.Mechanical Behavior of RPC Filled Double Skin Circular Steel Tube Columns[J].Journal of Railway Science and Engineering,2016,13(12):2 427-2 433.in Chinese)
[7]邓宗才.FRP厚度和品种对约束UHPC轴压性能的影响[J].哈尔滨工程大学学报,2016,37(2):218-222.(DENG Zong-cai.Effects of Thicknesses and Types of Fiber Reinforced Polymer Tubes on the Uniaxial Compressive Behavior of Confined UHPC Specimen[J].Journal of Harbin Engineering University,2016,37(2):218-222.in Chinese)
[8]单波,赖大德,刘福财.大尺寸RPC管-HSC组合柱轴压性能试验研究[J].材料导报A:综述篇,2017,31(12):96-102.(SHAN Bo,LAI Da-de,LIU Fu-cai.Experimental Research on Axial Compression Performance of LargeScale HSC-Filled RPC Tube[J].Materials Review A:Review Papers,2017,31(12):96-102.in Chinese)
[9]单波,陈超,赖大福,等.RPC管-混凝土组合柱高温后轴压性能试验研究[J].湖南大学学报(自然科学版),2018,45(9):1-9.(SHAN Bo,CHEN Chao,LAI Da-de,et al.Experimental Research on Mechanical Properties of ConcreteFilled RPC Tube Columns After High Temperature[J].Journal of Hunan University(Natural Sciences),2018,45(9):1-9.in Chinese)
[10]牛志强,郝文秀,杜喜凯,等.方钢管活性粉末混凝土轴压柱力学性能试验研究[J].建筑科学,2018,34(7):78-84.(NIU Zhi-qiang,HAO Wen-xiu,DU Xi-kai,et al.Experimental Study on the Mechanical Properties of the Square Steel Tube Reactive Powder Concrete Columns by Axial Compression[J].Building Science,2018,34(7):78-84.in Chinese)
[11]戎芹,曾宇声,侯晓萌,等.圆钢管RPC轴压短柱有限元分析与承载力计算[J].哈尔滨工业大学学报,2018,50(12):61-66.(RONG Qin,ZENG Yu-sheng,HOU Xiao-meng,et al.Finite Element Analysis and Bearing Capacity Calculation for RPC-Filled Circular Steel Tube Columns Under Axial Compression[J].Journal of Harbin Institute of Technology,2018,50(12):61-66.in Chinese)
[12]吕雪源,王英,符程俊,等.活性粉末混凝土基本力学性能指标取值[J].哈尔滨工业大学学报,2014,46(10):1-9.(LYU Xue-yuan,WANG Ying,FU Cheng-jun,et al.Basic Mechanical Property Indexes of Reactive Powder Concrete[J].Journal of Harbin Institute of Technology,2014,46(10):1-9.in Chinese)
[2]刘超,马汝杰,王俊颜,等.超高性能混凝土薄层加固法在槽形梁桥中的应用[J].桥梁建设,2017,47(5):112-116.(LIU Chao,MA Ru-jie,WANG Jun-yan,et al.Application of Reinforcement Method of UHPC Thin Layers to Through Beam Bridges[J].Bridge Construction,2017,47(5):112-116.in Chinese)
[3]季文玉,罗华,杨国静.钢管活性粉末混凝土长柱轴压性能试验研究[J].中国铁道科学,2014,35(1):28-33.(JI Wen-yu,LUO Hua,YANG Guo-jing.Experimental Research on Mechanical Behavior of Axially Loaded RPC Filled Circular Steel Tube Slender Column[J].China Railway Science,2014,35(1):28-33.in Chinese)
[4]杨克家,孙林柱,李桅,等.RPC中空受压构件截面设计及受力性能研究[J].工程力学,2016,33(5):166-175.(YANG Ke-jia,SUN Lin-zhu,LI Wei,et al.Cross Section Design and Mechanical Performance Investigation into RPC Hollow Members[J].Engineering Mechanics,2016,33(5):166-175.in Chinese)
[5]唐昌辉,刘冬明.活性粉末混凝土柱轴心受压试验研究[J].中国科技论文,2016,11(1):7-11.(TANG Chang-hui,LIU Dong-ming.Experimental Study on Reactive Powder Concrete Columns Under U-niaxial Compression[J].China Science Paper,2016,11(1):7-11.in Chinese)
[6]唐昌辉,欧阳鹏.圆中空夹层钢管RPC轴心受压短柱的试验研究[J].铁道科学与工程学报,2016,13(12):2 427-2 433.(TANG Chang-hui,OUYANG Peng.Mechanical Behavior of RPC Filled Double Skin Circular Steel Tube Columns[J].Journal of Railway Science and Engineering,2016,13(12):2 427-2 433.in Chinese)
[7]邓宗才.FRP厚度和品种对约束UHPC轴压性能的影响[J].哈尔滨工程大学学报,2016,37(2):218-222.(DENG Zong-cai.Effects of Thicknesses and Types of Fiber Reinforced Polymer Tubes on the Uniaxial Compressive Behavior of Confined UHPC Specimen[J].Journal of Harbin Engineering University,2016,37(2):218-222.in Chinese)
[8]单波,赖大德,刘福财.大尺寸RPC管-HSC组合柱轴压性能试验研究[J].材料导报A:综述篇,2017,31(12):96-102.(SHAN Bo,LAI Da-de,LIU Fu-cai.Experimental Research on Axial Compression Performance of LargeScale HSC-Filled RPC Tube[J].Materials Review A:Review Papers,2017,31(12):96-102.in Chinese)
[9]单波,陈超,赖大福,等.RPC管-混凝土组合柱高温后轴压性能试验研究[J].湖南大学学报(自然科学版),2018,45(9):1-9.(SHAN Bo,CHEN Chao,LAI Da-de,et al.Experimental Research on Mechanical Properties of ConcreteFilled RPC Tube Columns After High Temperature[J].Journal of Hunan University(Natural Sciences),2018,45(9):1-9.in Chinese)
[10]牛志强,郝文秀,杜喜凯,等.方钢管活性粉末混凝土轴压柱力学性能试验研究[J].建筑科学,2018,34(7):78-84.(NIU Zhi-qiang,HAO Wen-xiu,DU Xi-kai,et al.Experimental Study on the Mechanical Properties of the Square Steel Tube Reactive Powder Concrete Columns by Axial Compression[J].Building Science,2018,34(7):78-84.in Chinese)
[11]戎芹,曾宇声,侯晓萌,等.圆钢管RPC轴压短柱有限元分析与承载力计算[J].哈尔滨工业大学学报,2018,50(12):61-66.(RONG Qin,ZENG Yu-sheng,HOU Xiao-meng,et al.Finite Element Analysis and Bearing Capacity Calculation for RPC-Filled Circular Steel Tube Columns Under Axial Compression[J].Journal of Harbin Institute of Technology,2018,50(12):61-66.in Chinese)
[12]吕雪源,王英,符程俊,等.活性粉末混凝土基本力学性能指标取值[J].哈尔滨工业大学学报,2014,46(10):1-9.(LYU Xue-yuan,WANG Ying,FU Cheng-jun,et al.Basic Mechanical Property Indexes of Reactive Powder Concrete[J].Journal of Harbin Institute of Technology,2014,46(10):1-9.in Chinese)
© 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 |