| 摘要: |
| 利用沥青混合料(Superpave 20)在不同温度和频率下的复数模量试验结果，得到沥青混合料的存储模量.根据时间温度等效原理，确定了沥青混合料存储模量主曲线.利用配置法和相关的黏弹性理论关系式，将沥青混合料的存储模量转化为沥青混合料的松弛模量，并确定了松弛模量Prony系列表达式的各个参数.结果表明：利用较为简单的复数模量试验可以确定沥青混合料在10-8~108s内的松弛模量，且松弛模量Prony系列表达式具有幂指数组合形式并对应于Wiechert力学模型，这为沥青混合料黏弹性力学分析提供了有效途径. |
| 关键词: 复数模量 松弛模量 配置法 Prony系列 |
| DOI：10.3969/j.issn.1007 9629.2012.04.012 |
| 分类号: |
| 基金项目:高等学校博士学科点专项科研基金资助项目（20100041120005）; 国家自然科学基金资助项目（50778057）；内蒙古交通科技项目（NJ 2009 11）;西部交通建设科技项目(2009318773054) |
|
| Determination of Relaxation Modulus Using Complex Modulus of Asphalt Mixture |
|
ZHAO Yan qing, TANG Ji min, BAI Long
|
|
School of Transportation Engineering, Dalian University of Technology, Dalian 116024, China
|
| Abstract: |
| Direct determination of relaxation modulus from testing involves difficulties in testing operation and may cause large errors.Storage modulus master curve for Superpave 20 asphalt mixture were developed according to time temperature superposition principle using storage modulus from complex modulus testing results at various temperatures and frequencies.The storage modulus was converted to relaxation modulus by using collocation method and viscoelastic theories.The parameters of Prony series representations for relaxation modulus were determined.The results show that relaxation modulus over 10-8108s can be obtained for asphalt mixtures using simple complex modulus testing.The Prony series representations for relaxations modulus correspond to Wiechert mechanical models and they are expressed in exponential series form.The results provide great conveniences in the analysis of viscoelastic mechanical behavior of asphalt mixtures. |
| Key words: complex modulus relaxation modulus collocation method Prony series |
