无机聚合物钢管混凝土柱抗震性能试验研究
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摘要
依据无机聚合物与钢管混凝土各自的特点,提出了无机聚合物圆形钢管混凝土组合结构。为研究该新型组合结构形式在往复荷载作用下的破坏特征、抗震性能、变形能力,本文以含钢率和轴压比为主要参数,进行了5根无机聚合物钢管混凝土柱拟静力试验,并分析各参数对试验结果的影响。考虑试件的初始缺陷及材料非线性进行了有限元分析。有限元计算及试验结果:有限元计算结果与试验结果吻合较好;试件的破坏为刚性夹具与试件连接处钢管截面被压曲、核心混凝土被压碎,构件丧失承载力,即为压弯破坏;试件的滞回曲线饱满,没有明显的捏缩现象,位移延性系数在3~8之间,基本满足结构抗震设计要求,表明无机聚合物钢管混凝土柱在往复荷载作用下具有良好的抗震性能;影响构件的抗震性能的最主要因素是含钢率,随含钢率的增大,无机聚合物圆形钢管混凝土构件抵抗地震的能力增强。
Based on the characteristics of inorganic polymer concrete and steel,the authors propose the structure of inorganic polymer round concrete-filled steel tubular columns. In order to study the failure characteristics,seismic performance and deformability of inorganic polymers concrete-filled steel tubular columns under cyclic loads,in this paper five inorganic polymer concrete-filled steel tubular columns pseudo-static test was done considering the variation of axial load ratio and steel ratio of the specimens and analyzing the impact of various parameters on test results. Finite element analysis was carried out based on initial imperfection and material nonlinearity. The finite element analysis and the experimental results show that the finite element calculation results agree well with the experimental results. The failure modes of the columns are bending damage that the steel tube in the connection between rigid fixture and specimen is buckled and the core concrete is crushed and the specimen loses its carrying capacity.The hysteretic curves of the specimen are plump and have not significant pinch phenomenon in shape. The displacement ductility coefficient is from 3 to 8 and is satisfying the requirements of seismic design. Results indicate that the inorganic polymers concrete-filled steel tubular columns have excellent seismic performance. The main fac-tor that affects the seismic performance of the specimens is the steel ratio. The ability to resist earthquake increases with steel ratio increasing.
Based on the characteristics of inorganic polymer concrete and steel,the authors propose the structure of inorganic polymer round concrete-filled steel tubular columns. In order to study the failure characteristics,seismic performance and deformability of inorganic polymers concrete-filled steel tubular columns under cyclic loads,in this paper five inorganic polymer concrete-filled steel tubular columns pseudo-static test was done considering the variation of axial load ratio and steel ratio of the specimens and analyzing the impact of various parameters on test results. Finite element analysis was carried out based on initial imperfection and material nonlinearity. The finite element analysis and the experimental results show that the finite element calculation results agree well with the experimental results. The failure modes of the columns are bending damage that the steel tube in the connection between rigid fixture and specimen is buckled and the core concrete is crushed and the specimen loses its carrying capacity.The hysteretic curves of the specimen are plump and have not significant pinch phenomenon in shape. The displacement ductility coefficient is from 3 to 8 and is satisfying the requirements of seismic design. Results indicate that the inorganic polymers concrete-filled steel tubular columns have excellent seismic performance. The main fac-tor that affects the seismic performance of the specimens is the steel ratio. The ability to resist earthquake increases with steel ratio increasing.
引文
[1]张春梅,阴毅,周云.钢管高强混凝土柱抗震性能的试验研究[J].地震工程与工程振动,2004,24(4):86-89.ZHANG Chunmei,YIN Yi,ZHOU Yun.Experimental study on seismic behaviors of high strength concrete filled steel tube columns[J].Journal of Earthquake Engineering and Engineering Vibration,2004,24(4):86-89.(in Chinese)
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[7]韩林海,游经团,等.往复荷载作用下矩形钢管混凝土构件力学性能的研究[J].土木工程学报,2004,37(11):11-23.HAN Linhai,YOU Jingtuan,et al.Behavior of concrete-filled steel rectangular hollow sectional columns subjected to cyclic loading[J].China Civil Engineering Journal,2004,37(11):11-23.(in Chinese)
[8]曹兵.T形钢管混凝土柱抗震性能非线性有限元分析[D].武汉:武汉理工大学硕士学士论文,2013.CAO Bing.Nonlinear finite element analysis on seismic performance of T-shaped steel tubular column[D].Wuhan:Master's Degree Thesis of Wuhan University of Technology,2013.(in Chinese)
[9]GB50010-2010结构混凝土设计规范[S].北京:中国建筑工业出版社,2010.GB50010-2010 Code for Design of Concrete Structures[S].Beijing:China Building Industry Press,2010.(in Chinese)
[2]JG J101-96建筑抗震试验方法规程[S].北京:中国建筑科学研究院,1997.JG J101-96 Specificating of Testing Methods for Earthquake Resistant Building[S].Beijing:Academy of Building Research of China,1997.(in Chinese)
[3]吕西林,陆伟东.反复荷载作用下方钢管混凝土柱的抗震性能试验研究[J].建筑结构学报,2000,21(2):2-11.LU Xilin,LU Weidong.Seismic behavior of concrete-filled rectangular steel tubular columns under cyclic loading[J].Journal of Building Structures,2000,21(2):2-11.(in Chinese)
[4]尚作庆,黄承逵,常旭,等.钢管自应力混凝土柱抗震性能试验研究[J].地震工程与工程振动,2008,28(3):77-81.SHANG Zuoqing,HUANG Chengkui,CHANG Xu,et al.Experimental research on shear-resistance properties of self-stressing concrete filled steel tube[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(3):77-81.(in Chinese)
[5]李斌,马凯泽,刘惠东.方钢管高强混凝土柱抗震试验研究[J].工程力学,2009,26:139-143.LI Bin,MA Kaize,LIU Huidong.Seismic behavior of square high strength concrete-filled steel tubular columns[J].Engineering Mechanics,2009,26:139-143.(in Chinese)
[6]夏训成,卢哲安,彭自强.预应力混凝土框架抗震性能拟静力试验研究[J].武汉理工大学学报,2009,31(13):56-59.XIA Xuncheng,LU Zhean,PENG Ziqiang.Pseudo-static test on seismic performance of bonded prestressed concrete frame[J].Journal of Wuhan University of Technology,2009,31(13):56-59.(in Chinese)
[7]韩林海,游经团,等.往复荷载作用下矩形钢管混凝土构件力学性能的研究[J].土木工程学报,2004,37(11):11-23.HAN Linhai,YOU Jingtuan,et al.Behavior of concrete-filled steel rectangular hollow sectional columns subjected to cyclic loading[J].China Civil Engineering Journal,2004,37(11):11-23.(in Chinese)
[8]曹兵.T形钢管混凝土柱抗震性能非线性有限元分析[D].武汉:武汉理工大学硕士学士论文,2013.CAO Bing.Nonlinear finite element analysis on seismic performance of T-shaped steel tubular column[D].Wuhan:Master's Degree Thesis of Wuhan University of Technology,2013.(in Chinese)
[9]GB50010-2010结构混凝土设计规范[S].北京:中国建筑工业出版社,2010.GB50010-2010 Code for Design of Concrete Structures[S].Beijing:China Building Industry Press,2010.(in Chinese)
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