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钢桥面与环氧沥青铺装界面动态剪切模量及其主曲线研究

Research on Dynamic Shear Modulus for Interface between the Steel Bridge Deck and the Epoxy Asphalt Pavement and its Master Curve
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摘要 为建立钢桥面与环氧沥青铺装界面的动态剪切模量主曲线方程,采用SCIS(Steel-Concrete Interface Shear)动态剪切试验,测得温度为5℃、15℃、25℃、40℃、60℃以及荷载频率为0.1 Hz、0.5 Hz、1 Hz、5 Hz、10 Hz、25Hz条件下的界面动态剪切模量和相位角。基于时间-温度等效原理和Williams-Landel-Ferry公式建立了界面动态剪切模量主曲线。研究结果表明:界面动态剪切模量随温度升高而显著减小,随荷载频率增大而增大;界面动态剪切模量满足时间-温度等效原理,主曲线的拟合程度较好,可用于预测更大范围温度和荷载作用频率下的界面动态剪切模量;在动态剪切荷载作用下,界面相位角较小,主要呈现弹性性能。钢桥面与铺装界面动态剪切模量主曲线的建立为钢桥面铺装结构设计与分析提供了重要的结构参数。 In order to obtain the master curve equation of dynamic shear modulus for interface between the steel bridge deck and the epoxy asphalt pavement, SCIS (Steel-Concrete Interface Shear) tests are performed under temperatures of 5℃, 15℃, 25℃, 40℃, 60℃ and frequencies of 0.1 Hz, 0. 5 Hz, 1 Hz, 5 Hz, 10 Hz, 25 Hz for each temperature. Dynamic shear modulus and phase angles are presented and analyzed. Master curves for interface between the steel bridge deck and the epoxy asphalt pavement are constructed based on time-temperature equivalence principle and Williams-Landel-Ferry formula. Results show that the dynamic shear modulus significantly decreases with the increase of temperature and increases with increasing loading frequency. There is a good degree of fitting between the measured dynamic shear modulus values and results of analytical calculations obtained from the master curve. It indicates that the dynamic shear modulus meets the time-temperature equivalence principle well and the master curve can be used to predict the dynamic shear modulus within greater range of temperature and frequency. The interface primarily exhibits elastic behavior when subjected to dynamic shear loading. The master curve provides important structural parameters for design and analysis of the steel bridge deck pavement.
作者 李方超 姚波 周鲁晓冬 LI Fang-chao ,YAO Bo , ZHOU LU Xiao-dong (Department of Civil Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
出处 《公路》 北大核心 2017年第12期96-102,共7页 Highway
基金 国家自然科学基金,项目编号51208103 江苏省普通高校研究生科研创新计划项目,项目编号SJZZ16-0077
关键词 界面 动态剪切模量 时间-温度等效原理 主曲线 SCIS试验 interface dynamic shear modulus time-temperature equivalence principle master curve SCIS test
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