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工程科学与技术:2012,44(6):40-46
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热老化条件下公路桥梁板式氯丁橡胶支座受压试验
(1.沈阳建筑大学 土木工程学院;2.辽宁省建筑材料监督检验院;3.重庆市公路工程质量检测中心;4.重庆交通建设(集团)有限责任公司)
Compression Tests of Plain Chloroprene Rubber Bearings of Highway Bridge Under Thermal Aging Condition
(1.School of Civil Eng., Shenyang Jianzhu Univ.;2.Supervision and Inspection Inst. of Building Material in Liaoning Province;3.Chongqing Highway Eng. Quality Inspection Center;4.Chongqing Communications Construction Group)
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投稿时间:2012-07-11    修订日期:2012-09-09
中文摘要: 公路桥梁橡胶支座比建筑橡胶支座更容易受到气候的影响。为了研究公路桥梁板式氯丁橡胶支座在热老化条件下的各项力学性能指标变化,将氯丁橡胶支座在高温试验箱中进行热老化处理20、40、60、80 d,并采用压力试验机对其进行轴心受压试验。研究热老化对氯丁橡胶支座的承载力、极限抗压强度、竖向刚度、抗压弹性模量的影响。试验结果表明,在热老化条件下,氯丁橡胶支座更易发生脆性破坏,弹性阶段缩短,发生钢板外露、裂缝、层状破坏等现象更严重;承载力、极限抗压强度、竖向刚度、抗压弹性模量随热老化程度的加深而逐渐降低;采用最小二乘法对50年抗压强度及抗压弹性模量进行分析,衰减函数和衰减曲线基本符合幂函数变化规律。
Abstract:The impact of climate is more serious to highway bridge rubber bearings than to building rubber bearings.In order to investigate the changes of the mechanical properties of plain chloroprene rubber bearings of highway bridge in high temperature of summer,the plain chloroprene rubber bearings were processed in 20, 40, 60, 80 days by high-temperature chamber, and then the axial compression tests were carried by pressure testing machine.The impact of thermal aging in carrying capacity,ultimate compressive strength,vertical stiffness,and elastic modulus of compression was analyzed.The results showed that, under thermal aging, the plain chloroprene rubber bearings was easier to brittle failure,the elastic stage was shorten,and the phenomenon which plate exposure,cracks and layered damage was more serious.With deepening of degree in thermal aging,the carrying capacities,ultimate compressive strength,vertical stiffness,and elastic modulus of compression were decreased.The dates of compressive strength and elastic modulus of compression in 50 years were analyzed using the least square method,and the results showed that the decay function and decay curve were basically in line with variation of power function.
文章编号:201200536     中图分类号:    文献标志码:
基金项目:国家“十二五”科技支撑计划资助项目(2012BAJ16B05);重庆市科技攻关计划资助项目(CSTC2011AC6157);辽宁省高等学校杰出青年学者成长计划资助项目(LJQ2011061);辽宁省教育厅科研资助项目(LS2010135)
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张延年,单春红,郑怡,沈小俊,高飞,熊卫士.热老化条件下公路桥梁板式氯丁橡胶支座受压试验[J].工程科学与技术,2012,44(6):40-46.
Zhang Yannian,Shan Chunhong,Zheng Yi,Shen Xiaojun,Gao Fei,Xiong Weishi.Compression Tests of Plain Chloroprene Rubber Bearings of Highway Bridge Under Thermal Aging Condition[J].Advanced Engineering Sciences,2012,44(6):40-46.