STUDY ON SLIT AND TRANSVERSE JOINT OF ROLLER COMPACTED CONCRETE GRAVITY DAM BASED ON TEMPERATURE STRESS SIMULATION ANALYSIS
基于温度应力仿真分析的碾压混凝土重力坝诱导缝开裂研究

Considering the true construction process of Pengshui Hydropower Station roller compacted concrete(RCC) gravity dam and adopting the blunt crack band model of concrete,transient finite element is applied to simulating layer-by-layer construction process to get the temperature field and stress field from construction period to operating period.Then crack and propagation of the dam-induced slits are computed by dynamic tracking method.The simulating analytical results of the whole dam show if induced of slit tip stress intensity factors exceed tensile bearing capacity of concrete on upstream face,and induced crack occurs.The crack of induced slit leads to tensile stress release near slit.The length of the induced slit of Pengshui Hydropower Station dam is suggested to 4.5 m on the basis of the cracking analytical result.