Dynamic response of asphalt launching site under circular distributed load considering temperature effect
Zhang Zhen-dong1 Ma Da-wei1 Yang Yun2 He Qiang1
1. Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;
2. Huanghe College of Science and Technology, Zhengzhou 450000, Henan, China
By transforming viscoelastic integral constitutive equation into Laplace style, the viscoelastic operator described by Maxwell model is deduced. Then time-temperature superposition principle is introduced to reflect the influence of temperature on mechanical property of asphalt concrete. By means of Laplace transformation and Fourier transformation of dynamic equilibrium equation、geometric equation and physical equation, transfer matrix of axisymmetrical problems in multi-layered viscoelastic half space is derived in rectangular coordinate system. Based on the transitive relation and known boundary condition, the solution of vertical displacement is given and arithmetic program is complied by using MATLAB software. Take three layers launching site as example, the dynamic response under circular distributed load is analyzed. Results indicate that the settlement and residual deflection increase gradually as temperature increases. The higher the temperature, the more obvious the local deflection phenomenon.
张震东1，马大为1，杨云2，何强1. 考虑温度效应的圆形均布载荷下沥青混凝土场坪的动力响应分析[J]. 振动与冲击, 2016, 35(19): 88-93.
Zhang Zhen-dong1 Ma Da-wei1 Yang Yun2 He Qiang1. Dynamic response of asphalt launching site under circular distributed load considering temperature effect. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(19): 88-93.
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