【摘要】 在寒区大温差环境下，探讨全桥变形-温度-车轮荷载耦合作用影响下的钢桥面铺装力学响应。依托呼和浩特市昭乌达路高架桥，针对4种典型的钢桥面铺装结构，通过有限元模拟的方法分析不同温度环境下钢桥面铺装的温度场和温度应力，结果表明，不同温度环境下铺装层温度场变化规律基本一致，与外界气温一样呈现出周期性变化；大温差的温度环境对桥面铺装的受力更为不利。开展钢桥面铺装在全桥变形-温度-车轮荷载耦合作用下的低温力学响应分析。结果表明，考虑桥梁结构变形对桥面铺装的影响，不仅使铺装结构受力变大，而且使铺装结构表面拉压力的周期性变化时间缩短，更容易引发疲劳破坏；且“下层浇筑式沥青混凝土+上层环氧沥青混凝土”铺装结构组合在低温下的力学性能更好。更多还原

【Abstract】 This paper investigates the mechanical response of steel deck pavement under the coupling effect of deformation, temperature and wheel load in the cold area. Relies on the Zhaowuda Road elevated bridge in Hohhot, aiming at four typical steel bridge deck pavement structures, the temperature field and thermal stress of steel bridge deck pavement under different temperature environments are analyzed by finite element simulation method. The results show that the temperature field of pavement layer under different temperature environment was basically the same, and showed periodic changes like the external temperature. The temperature environment with large temperature difference was more unfavorable to the force of bridge deck pavement. At the same time, the low temperature mechanical response of steel deck pavement under the coupling effect of deformation, temperature and wheel load was analyzed. The results show that considering the influence of bridge structure deformation on bridge deck pavement, not only the stress of the pavement structure is increased, but also the periodic change time of tensile and compressive force on the surface of the pavement structure was shortened, which was more likely to cause fatigue failure. The mechanical properties of the pavement structure combination of “lower poured asphalt concrete + upper epoxy asphalt concrete” are better at low temperature.更多还原