摘要
为确定沥青混合料的粘弹性参数,在10,5,0,-5,-15,-20,-25,-30℃下进行了应力松弛试验,采有Maxwell摸型,运用粘弹性力学相关理论对沥青混合料的粘弹性参数测定方法进行了分析,提出了该测定方法的数学模型,并用Origin软件进行了计算求解.分析指出,用累计耗散能可分析沥青混合料的疲劳破坏,累计耗散能与疲劳寿命之间存在唯一的关系,其它因素如试验方法、加载频率、加载模式、温度等对其影响不大.最后简要说明了累积耗散能的求解方法.
Bituminous mixture is a sort of viscoelastic material.It is important to ascertain the viscoelastic parameters in the constitutive relation and fatique equation. In this paper, the theory of viscoelastic mechanics is employed for the analysis of how to test viscoelastic parameters of bituminous mixture with the test of stress relaxation .The mathematical model is given, which is calculated through using Origin software. It was reported that using accumulative dissipated energy can analyze the fatigue damage of bituminous mixture.There is an exclusive relation between accumulative dissipated energy and fatigue life,but other factors such as test methods, loading frequency, loading modes and temperature have nothing to do with it.Finally, the method to calculate the accumulative dissipated energy is illuminated concisely.
出处
《郑州大学学报（工学版）》
CAS
2004年第4期8-11,15,共5页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(50178012)
关键词
沥青混合料
粘弹性参数
粘弹性力学
Maxwell摸型
累积耗散能
stress relaxation test
bituminous mixture
viscoelasticity
General Maxwell model
accumulative dissipated energy
