混凝土路面板热屈曲的临界变温分析

混凝土路面板的热屈曲因板的热压应力引起，而混凝土路面板的临界变温可定义为路面板屈曲时的温度与铺设成型时的温度之差．在分析混凝土路面板在温度场作用下热胀屈曲临界变温的基础上．根据板的热屈曲方程，选择混凝土材料的Piosson比作为小参数，得到临界变温的摄动解．结果表明：临界变温正比于混凝土板的抗弯刚度．混凝土材料的Poisson比及板宽与板长之比对板的临界变温无明显影响．并将摄动解与压杆的Euler临界变温相比较，发现两者的差别为O（v^2）．当Poisson比在0．15～0．2范围内变化时，板的临界变温总是大于压杆的Euler临界变温．且两者相差小于5％．因此，采用压杆的Euler临界变温近似计算板的临界变温对于道路设计而言总是较为安全的．

Analysis on Critical Change Temperature of Concrete Pavement for Thermal Buckling

Thermal buckling of concrete pavement may take place due to the action of internal thermal compressive stress.Usually,the critical temperature variation of concrete pavement is defied as the difference between thermal buckling temperature and the pavement formation temperature.In this paper,the critical temperature variation of concrete pavement is studied.According to the partial differential equation of thermal buckling,the perturbation solution of the critical change temperature is obtained by selecting ...