RESEARCH ON THERMAL STRESS OF LARGE DIAMETER CONCRETE SILOS

Inner force calculation formula of large diameter silo wall subjected to solid load and temperature action (middle section and differential temperature change) were derived based on cylindrical shell theory with moment. The formula show that the influence of middle section temperature change on silo wall is limited to the vicinity of fixed end and attenuates rapidly. The effect of middle section temperature change on the reinforcement design of silo wall can be neglected. However, differential temperature change has significant effect on the reinforcement design of silo wall, and the circumferential moment could be considered as equivalent hoop force. The results of parametric analysis show temperature action is in linear relationship with differential temperature change, elastic modulus and the thickness of silo wall. Moreover, the ratio of temperature action to the maximum hoop force of silo wall decreases when the inner diameter of large diameter silo increases.