坝体碾压混凝土温度应力场研究

摘要

The temperature control of roller compacted concrete is a key problem in the construction of RCC dam. Especially in the winter, the temperature difference between inside and outside is lar-ger, and it is easy to cause too much stress on the surface of the dam. At the same time, under the action of water storage, the surface is also very easy to produce cracks. If cracks appear in the upper reaches of the dam, it will directly threaten the safety and durability of the dam. In this paper, the temperature stress field is simulated and analyzed by using three dimensional finite element method.%碾压混凝土的温控防裂一直是碾压混凝土坝建设的关键问题，特别是在浇筑后的冬季，内外温差较大，容易在坝体表面引起过大的拉应力。同时，在蓄水冷击的作用下，表面也极易产生裂缝。如果上游坝面出现裂缝，将直接威胁到大坝的安全与耐久性。运用三维有限元法对温度应力场进行仿真分析。