An Analysis Of Temperature Field And Temperature-stress In RCC Dam With Consideration Of Induced-crack

Roller-compacted concrete dam is a kind of widespread available construction technology in recent years. With the increasing of the quantity and scale of dams, there are such more sophisticated temperature-stress problems that the chances of appearing cracks are growing. For leading temperature-crack of dam concrete to split in the reserved positions, induced-crack was used in many large water-power engineering as a structure measure and gained well-known effectiveness in releasing stress. There are some coherent reports about mechanism of action and failure rules of induced-crack, but it is not enough how to analyze temperature field and temperature-stress field of concrete in dam body with simulating action of induced-crack in actual engineering in recent documents.In first, the paper sets forth thermal and mechanical performance of materials of RCC dam construction, and study one of important characters of concrete—creep—and gives out relatively exact fitting formula and calculation program. Otherwise, it is detailed discussed water temperature of reservoir after dam completed and impounded. The paper calculates water temperature of actual engineering by establishing linear dimension mathematic model and supplies exact terminal condition for three dimension simulating analysis of temperature field and temperature-stress field in operating period.The point of the paper is three dimension simulating analysis of temperature field and temperature-stress field of RCC arch dam by FEM. The paper divides meshes according quantity and position of induced-crack and takes in account of different construct conditions to calculate some typical schemes. After we analyzed the calculating results, we have clearly cognitions in distribution of temperature field and temperature-stress field. Furthermore, it illuminates action of induced-crack in releasing local high stress of dam body.