新型钢桥面铺装材料在疲劳与冲击交替加载作用下的损伤分析

Damage Analysis of a New Type of Steel Bridge Deck Pavement Material Under Alternating Loading of Fatigue and Impact

对液体橡胶混凝土圆柱体试件进行疲劳与冲击交替加载试验,测量每次加载前后弹性模量的变化,用弹性模量的衰减定义损伤,分析这种新型桥面铺装材料在疲劳与冲击交替加载作用下损伤的演化情况,比较完成特定次数疲劳循环后材料在相同冲击速度下的力学响应,并对单独疲劳加载情况下材料内部损伤的演化进行分析。

The alternating loading tests of fatigue and impact for cylindrical specimens of the liquid rubber concrete were made, the variations of elastic modulus of the concrete were measured before and after loading each time in the tests and the damage to the concrete was defined by the decaying of the elastic modulus. The damage evolution of such a new type of the deck pavement concrete material under the alternating loading of fatigue and impact was analyzed, the mechanical responses of the material under the same impact velocity after given cycles of fatigue loading were compared and the damage evolution inside the material just under the single fatigue loading was analyzed as well.