【摘要】 模拟沿海寒冷地区混凝土结构的工作状态,试验研究了冻融循环与海水浸泡交替作用下不同含气量混凝土的强度变化以及含气量对持续承载钢筋混凝土梁力学性能的影响。结果表明,对于含气量分别为6.1%、3.2%的混凝土,经历300次冻融循环和100次海水浸泡交替作用后,含气量高的混凝土具有更好的抗冻性,含气量为6.1%的持续承载钢筋混凝土梁的极限承载力和变形能力均好于含气量为3.2%的钢筋混凝土梁。更多还原

【Abstract】 The service condition of concrete structures in cold coastal region was simulated.Under the alternative actions of freeze-thaw cycles and seawater immersion,the concrete strength deterioration with different air content and the effect of air content on behavior of beams with sustained load were experimentally studied.The results showed that,for the concrete with air content of 6.1% and 3.2%,after300 cycles of freeze-thaw and 100 times of seawater immersion,the concrete with higher air content showed better resistance to freeze-thaw.Compared to the beams with sustained load and air content of 3.2%,the beams with sustained load and air content of 6.1%showed better ultimate bearing capacity and deformability.更多还原