桥梁板式橡胶支座酸腐蚀寿命时变可靠性研究

英文篇名：Study on Service Life of Laminated Rubber Bearings under Action of Acid Corrosion Based on Time-depending Reliability
中文刊名：公路工程
英文刊名：Highway Engineering
作者：陈伯奎 ; 沈小俊 ; 郑怡 ; 熊卫士 ; 高飞 ; 张延年
英文作者：CHEN Bokui1 ; SHEN Xiaojun1 ; ZHENG Yi2 ; XIONG Weishi3 ; GAO Fei1 ; ZHANG Yannian4(1.Chongqing Center for Test of Highway Engineering ; Chongqing 400060 ; China ; 2.LiaoNing Building Materials Science Institute ; Shenyang ; Liaoning 110032 ; China ; 3.ChongQing Traffic Construction(Group) Limited Liability Company ; Chongqing ; 400060 ; China ; 4.School of Civil Engineering ; ShenYang JianZhu University ; Shenyang ; Liaoning 110168 ; China)
中文关键词：板式橡胶支座 ; 酸腐蚀 ; 寿命 ; 时变可靠性
英文关键词：laminated rubber bearings ; acid corrosion ; life ; time-depending reliability
出版日期：2013-08-20
机构：重庆市公路工程质量检测中心;辽宁省建筑材料科学研究所;重庆交通建设(集团)有限责任公司;沈阳建筑大学土木工程学院;
年：2013
期：04
出版单位：公路工程

摘要

桥梁板式橡胶支座容易受到酸雨的影响,为了研究板式橡胶支座经过酸腐蚀后的力学性能情况,采用3.0%的硫酸溶液对公路桥梁橡胶支座分别进行20 d、40 d、60 d和80 d的酸腐蚀处理,并进行轴心受压试验研究。结合橡胶支座酸腐蚀损伤失效过程,建立了桥梁板式橡胶支座的酸腐蚀损伤时变可靠度计算模型。结果表明,随着时间的推移,桥梁板式橡胶支座的酸腐蚀损伤时变可靠指标逐渐变小,变化趋势呈抛物线型。通过模型可预测桥梁板式橡胶支座的酸腐蚀寿命,为板式橡胶支座的酸腐蚀损伤计算提供依据,为维护部门提供决策依据,降低失效风险。
Plain rubber bearings are more vulnerable to corrosion of acid precipitation.In order to research on the mechanics performance of plain rubber bearings of bridge under different acid corrosion condition,the rubber bearings were dealt with 3.0% sulfuric acid for 20 d,40 d,60 d and 80 d,and the compressive behavior of those were tested with pressure testing machine.By studying relationship of rate of strength loss and acid numbers,it was founded that calculating damaging model of laminated rubber bearings of bridge based on time-depending reliability under action of acid corrosion.It was shown that time-depending reliability index of laminated rubber bearings of bridge in acid corrosion was gradually changing smaller,with time going by,and changing tendency was parabola.Though model,the acid corrosion life of the laminated rubber bearings of bridge can be predicted.It is supplied basis of acid corrosion damaging calculation for the laminated rubber bearings of bridge,reduce losing risk.

引文

[1]周明华,张蓓.橡胶支座的应用前景和质量忧患[J].公路,2003,8(4):5-7.
    [2]周明华,葛宝翔.公路桥梁橡胶支座的使用寿命与应用对策[J].土木工程学报,2005,38(6):92-96.
    [3]秦德生.板式橡胶支座力学性能试验研究及数值模拟[D].大连:大连理工大学,2008.
    [4]李慧,邓学晶,杜永峰,等.寒区叠层橡胶隔震支座拟静力试验研究[J].低温建筑技术,2003(4):33-35.
    [5]李慧,杜永峰,狄生奎,等.叠层橡胶隔震支座的低温往复试验及等效阻尼比推算[J].兰州理工大学学报,2006,32(5):116-119.
    [6]李程,张念来.铁路钢桁拱桥减隔震支座设计参数的优化研究[J].公路工程,2009,34(3):89-93.
    [7]张军.支座设置对混凝土连续板桥受力性能的影响[J].公路工程.2009,34(4):122-125.
    [8]顾浩声,伊藤義人.天然橡胶隔震支座的内部老化特性及预测方法[J].北京工业大学学报.2012,38(2):185-193.
    [9]CELIN A M,WISE J,OTTESEN,D K,et al.Correlation ofchemical and mechanical property changes during oxidativedegradation of neoprene[J].Polymer Degradation and Stabil-ity,2000(68):171-184.
    [10]DU Yong-feng,LI Hui,SPENCER B F.Effect of non-pro-portional damping on seismic isolation[J].journal of Struc-tural Control,2002,9(3):205-236.
    [11]庄学真,周福霖,徐丽,等.大直径建筑叠层橡胶隔震装置温度相关性及老化性能研究[J].西安建筑科技大学学报(自然科学版),2009,41(6):791-798.
    [12]刘文光,杨巧蓉,周福霖.建筑用铅芯橡胶隔震支座温度性能研究[J].世界地震工程,2003,19(2):39-44.
    [13]JT/T663-2006,公路桥梁板式橡胶支座规格系列[S].
    [14]郑怡,李莉,许嘉龙,等.新型墙体材料冻融循环寿命时变可靠性[J].中南大学学报(自然科学版).2011,42(11):3342-3346.