高黏弹性沥青砂的抗裂性能研究

发布时间：2018-03-18 11:22

本文选题：道路工程　切入点：高黏弹性沥青砂　出处：《公路交通科技》2017年01期 　论文类型：期刊论文

【摘要】：应用断裂能理论来研究高黏弹性沥青砂的抗裂性能。通过在不同的试验温度与加载速率条件下进行SCB试验(Semi-Circular Bending Test,半圆弯拉试验),来分析温度与加载速率对破坏荷载和断裂能的影响,研究结果表明:当试验温度保持恒定时,试件的最大破坏荷载随着加载速率的增大而增大,试件的断裂能与加载速率呈负相关;当加载速率保持不变时,试件的最大破坏荷载将随着温度的升高而降低,试件的断裂能与试验温度呈正相关;该试验所需装置简单、试件制作方便、价格低廉,可以作为沥青混合料抗裂设计的标准试验方法。此外,运用ABAQUS有限元软件模拟试验过程并进行参数敏感性分析,将数值模拟结果与试验结果对比,验证了采用断裂能评价高黏弹性沥青砂抗裂性能的有效性。
[Abstract]:The fracture energy theory is applied to study the crack resistance of high viscoelastic asphalt sand. The SCB test semi-circular Bending test and semi-circular bending test are carried out under different test temperature and loading rate to analyze the effect of temperature and loading rate on the failure load. The effect of loading and fracture energy, The results show that when the test temperature remains constant, the maximum failure load increases with the increase of the loading rate, and the fracture energy of the specimen is negatively correlated with the loading rate, and when the loading rate remains constant, the fracture energy of the specimen is negatively correlated with the loading rate. The maximum failure load of the specimen will decrease with the increase of temperature, and the fracture energy of the specimen will be positively correlated with the test temperature. It can be used as the standard test method for asphalt mixture anti-cracking design. In addition, the ABAQUS finite element software is used to simulate the test process and the parameter sensitivity analysis is carried out, and the numerical simulation results are compared with the experimental results. The fracture energy is used to evaluate the crack resistance of high viscoelastic asphalt sand.
【作者单位】：沈阳建筑大学;浙江大学交通工程研究所;
【基金】：国家自然科学基金项目(51478276) 辽宁省自然科学基金项目(2014020070) 辽宁省教育厅项目(L2014234) 住房与城乡建设部项目(2014-K5-024)
【分类号】：U414

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