桥梁无缝伸缩缝树脂弹性体路用性能试验研究
Experimental Study on Road Performance of Resin Elastomer for Seamless Expansion Joints of Bridges
周伟 1盛亮 1高琴 1张辉 2赵梦龙2
作者信息
- 1. 江苏省交通工程建设局,江苏 南京 211899
- 2. 江苏中路工程技术研究院有限公司,江苏 南京 211899
- 折叠
摘要
无缝伸缩缝是一种新型的桥梁伸缩缝,为研究无缝伸缩缝树脂弹性体路用性能,探究应用于桥梁中小位移伸缩缝的可行性.该文通过 60℃车辙试验、-10℃低温小梁弯曲试验、动态模量试验、泊松比试验和Overlay Test(OT)试验对树脂弹性体的高低温稳定性、变形性能和疲劳抗裂性能进行了对比研究.试验结果表明:树脂弹性体60℃动稳定度>31 000 次/mm,-10℃低温弯曲应变>43 000×10‒6,不同温度和荷载条件下动态模量为 10～12 MPa,拉伸/压缩泊松比为0.030～0.050,OT试验断裂能相对TST弹塑体提高59%.桥梁无缝伸缩缝树脂弹性体具有优异的高低温性能,对温度和荷载频率不敏感,是一种泊松比低、抗疲劳开裂能力较强的材料,更能满足桥梁中小位移伸缩缝的行车和变形要求.
Abstract
Seamless expansion joint is a new type of bridge expansion joint.In order to study the road performance of resin elastomer for seamless expansion joints,the feasibility of applying resin elastomer to small and medium displacement expansion joints of bridges was explored.Through the rutting test at 60℃,low-temperature beam bending test at-10℃,dynamic modulus test,Poisson's ratio test,and overlay test(OT),the high and low temperature stability,deformation performance,and fatigue crack resistance of the resin elastomer were compared.The test results show that the dynamic stability of the resin elastomer at 60℃is more than 31 000 times/mm,and the bending strain at low temperature of-10℃exceeds 43 000×10-6.Under different temperatures and load conditions,the dynamic modulus is 10-12 MPa,and the Poisson's ratio of tension/compression is 0.03-0.05.The fracture energy of OT is 59%higher than that of the TST elastoplastic body.The resin elastomer for seamless expansion joints of bridges has excellent high and low temperature performance,and it is insensitive to temperature and load frequency.Therefore,it is a material with a low Poisson's ratio and strong fatigue crack resistance and can better meet the driving and deformation requirements of small and medium displacement expansion joints of bridges.
关键词
桥梁工程/无缝伸缩缝/树脂弹性体/路用性能/试验研究Key words
bridge engineering/seamless expansion joints/resin elastomer/road performance/experimental study引用本文复制引用
基金项目
国家重点研发计划(2021YFB1600300)
出版年
2024
国家科技期刊平台
NSTL
万方数据