PP-ECC墩柱抗震设计方法初探

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英文篇名：Preliminary Study on Seismic Design Method of PP-ECC Pier Column 作者：陈科旭 ; 孟庆利 ; 张锐 ; 单树攀 英文作者：CHEN Kexu;MENG Qingli;ZHANG Rui;SHAN Shupan;School of Civil Engineering and Architecture,Southwest University of Science and Technology;School of Civil Engineering,Southwest Jiaotong University; 关键词：PP-ECC墩柱 ; 平截面假定 ; 抗震设计方法 英文关键词：PP-ECC pier column;;Plane section assumption;;Seismic design method 中文刊名：XNGX 英文刊名：Journal of Southwest University of Science and Technology 机构：西南科技大学土木工程与建筑学院;西南交通大学土木工程学院; 出版日期：2019-03-31 出版单位：西南科技大学学报 年：2019 期：v.34;No.133 基金：西南科技大学研究生创新基金项目(18ycx096) 语种：中文; 页：XNGX201901009 页数：8 CN：01 ISSN：51-1640/N 分类号：52-59

摘要

针对将RC墩柱塑性铰区全截面置换为聚丙烯纤维工程水泥基复合材料(PP-ECC)的墩柱开展了抗震设计方法的研究。基于平截面假定,针对PP-ECC墩柱(将RC墩柱的塑性铰区混凝土置换为PP-ECC)首先推导了其塑性铰区截面弯矩-曲率曲线关键点(屈服弯矩、屈服曲率、峰值弯矩和峰值曲率)的计算方法,然后推导了PP-ECC墩柱力-位移曲线关键点(屈服承载力、屈服位移、峰值承载力、峰值位移)的计算方法,进而提出PP-ECC墩柱的抗震设计方法;基于PP-ECC(抗压强度fpp-c=30 MPa)的单轴力学性能试验确定了其一维拉压本构关系,依据所提出的PPECC墩柱的抗震设计方法计算确定了PP-ECC墩柱模型塑性铰截面的弯矩-曲率关键点值及PP-ECC墩柱模型力-位移曲线的关键点值,并与相应的RC墩柱模型(抗压强度fc=30 MPa)进行了对比分析,结果表明:PP-ECC墩柱相较于塑性铰区采用同等强度混凝土的RC墩柱,其承载力略有提高,且变形能力显著提高。
        The aseismic design method of RC pier column with plastic hinge region replacement with polypropylene fiber engineering cement matrix composite( PP-ECCC) is studied in this paper. Based on the assumption of plane section,the key points( yield moment,yield curvature) of the section moment curvature curve in the plastic hinge region of the RC pier column were first deduced for the PP-ECC pier column( replacing concrete in the plastic hinge region with PP-ECC). The calculation method of peak bending moment and peak curvature was derived,and the method of calculating the key points( yield bearing capacity,yield displacement,peak bearing capacity,peak displacement) of PP-ECC pier column was deduced,and the seismic design method of PP-ECC pier column was put forward. Based on the uniaxial mechanical properties test of PP-ECCs( compressive strength fpp-c= 30 MPa),a Vera compressive constitutive relation was determined. According to the proposed seismic design method of PP-ECC pier column,the moment curvature key points of plastic hinge section of PP-ECC pier column model and the key point value of force displacement curve of PP-ECC pier column model were determined. Then a comparative analysis was conducted with the corresponding RC pier column model( compressive strength fc= 30 MPa).The results show that compared with the RC pier column with the same strength in plastic hinge region,the bearing capacity and the deformation capacity of the 10 PP-ECC pier column are slightly increased and the deformation capacity is obviously improved.

引文

[1]项海帆.21世纪世界桥梁工程的展望[J].土木工程学报,2000,(3):1-6.
    [2]王克海,李茜.桥梁抗震的研究进展[J].工程力学,2007,(S2):75-82,128.
    [3]范立础.桥梁抗震[M].上海:同济大学出版社,1997:4-22.
    [4]杜修力,韩强,李忠献,等.5.12汶川地震中山区公路桥梁震害及启示[J].北京工业大学学报,2008,34(12):1270-1279.
    [5]范立础.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.
    [6]LI V.Engineered Cementitious Composites(ECC)-Material,Structural,and Durability Performance,in Concrete Construction Engineering Handbook,Chapter 24[M].Ed.E.Nawy,published by CRC Press,2008.
    [7]KESNER K E,BILLINGTON S L.Tension,Compression and Cyclic Testing of Engineered Cementitious Composite Materials[M].Technical Report MCEER-04-0002,2004.
    [8]KESNER K E,BILLINGTON S L,DOUGLAS K S.Cyclic response of Highly Ductile Cement-based Composites[M].ACI Materials Journal,2003,100(5):381-390.
    [9]FUKUY6AMA H,MATSU7ZAKI Y,NAKANO K,et al.Structural Performance of Beam Elements with PVA-ECC[C]//Proc.Third International Workshop on High Performance Fiber Reinforced Cement Composites(HP-FRCC3),H.W.Reinhardt and A.E.Naaman(eds.),1999,531-542.
    [10]俞家欢,吴琼,赵同峰.钢筋增强PP ECC长柱试验[J].沈阳建筑大学学报(自然科学版),2012,28(4):619-625,649.
    [11]东南大学.混凝土结构[M].北京:中国建筑工业出版社,2012.
    [12]钱稼茹,徐福江.钢筋混凝土柱基于位移的变形能力设计方法[J].建筑结构,2007,(12):30-32.
    [13]中华人民共和国交通运输部.公路桥梁抗震设计细则(JTGT B02-01-1308)[S].北京:人民交通出版社,2008.
    [14]中华人民共和国住房和城乡建设部.混凝土结构设计规范(GB 50010-2010)[S].北京:中国建筑工业出版社,2010.