论文部分内容阅读
弹性模量是反映材料刚度的重要指标。自然界中雨淋和冻融导致古建筑砌体砖处于非饱水冻融状态。通过大气环境实验舱对古砖进行非饱水冻融作用下的饱和系数、饱水度、动弹性模量、相对动弹性模量等技术参数实验,分析了非饱水冻融作用下古砖弹性模量变化规律。实验结果表明,饱水度大于等于60%时,非饱水冻融导致古砖试件动弹性模量和相对动弹性模量数值均出现明显下降趋势;饱水度小于60%时,非饱水冻融对动弹性模量和相对动弹性模量数值影响较小。非饱水冻融作用下,古砖的初始抵抗风化能力大小是影响动弹性模量和相对动弹性模量数值的重要因素。同时,对非饱水冻融作用下反映古砖抵抗冻融损伤能力的极限饱水程度等关键参数进行了讨论。
Elastic modulus is an important indicator of material stiffness. Natural rain and freeze-thaw led to the ancient building masonry brick in the state of non-full-frozen water. Through experiments of atmospheric environment experiment module on the parameters of saturation, saturation, dynamic elastic modulus and relative dynamic elastic modulus of ancient brick subjected to non-saturated freezing and thawing, Variation of elastic modulus. The experimental results show that the dynamic elastic modulus and the relative dynamic elastic modulus of the brick specimen decrease obviously when the saturated water content is 60% or more. When the water content is less than 60% Water freezing and thawing has little effect on the values of dynamic elastic modulus and relative dynamic elastic modulus. Under the condition of non-saturated freezing and thawing, the initial resistance weathering ability of ancient brick is an important factor affecting the dynamic elastic modulus and relative dynamic elastic modulus. At the same time, the key parameters such as the ultimate saturated water level reflecting the anti-freezing and thawing damage of ancient brick under the effect of freezing and thawing without water saturation are discussed.