混凝土箱形渡槽日照高温下结构安全研究

在分析箱形渡槽产生日照温差及温度应力的基础,利用ANSYS有限元软件对某渡槽日照温差及温度应力进行了有效的仿真模拟,结果表明:日照温差作用下,在混凝土箱形渡槽槽身内表面无论沿纵向和横向都将产生可观的温度应力,其值均已超过混凝土的抗拉设计强度。所以,在箱形渡槽槽身结构设计中对日照温差作用产生的温度应力必须予以重视,在设计中应配置适当的温度钢筋。

Structural Safety Research of Concrete Box Aqueduct Under Solar Radiation with High Temperature

The temperature difference and thermal stress of a box aqueduct under the solar radiation was simulated using the finite element software ANSYS. The results indicated that the considerable thermal stresses occur along the longitudinal and transverse directions of the inter-surface of the concrete box aqueduct, and the average value of the thermal stresses exceeds the design tensile strength of concrete. Therefore, the thermal stress generated by the solar radiation should be considered in the design of body structure of box aqueduct, and temperature reinforcement needs to be configured during the design process.