粉煤灰烧结保温砖砌体基本力学性能试验研究

Experimental study on basic mechanical properties of sintered hollow fly-ash brick masonry

为研究粉煤灰烧结保温砖砌体抗压、通缝抗剪、剪-压复合受力3方面性能,采用试验和理论计算的方法,对砌块砌体进行试验研究,得出相应的抗压强度标准值和设计值的建议取值;在对应力—应变实测曲线回归分析的基础上,得出粉煤灰烧结保温砖砌体应力—应变曲线的函数表达式,并给出弹性模量和泊松比的实测值;得出粉煤灰烧结保温砖砌体通缝抗剪强度的平均值和计算式;得出粉煤灰烧结保温砖砌体剪压复合受力抗剪强度平均值的建议计算式;掌握了该型砌体的主要破坏特征,并为后续研究及该类型砌体的推广应用提供基本的力学性能参数。

In order to study the properties of the three aspects of the compressive property,the joint shear strength and the performance under shear-compression loading of the sintered hollow fly-ash brickwork,the method of experiment and theoretical calculation is adopted to conduct experimental study on the masonry. The proposed characteristic value and design value is calculated. On the basis of the experimental data,the expression of stress-strain relationship of sintered hollow fly-ash brick masonry is put forward.The modulus of elasticity and the recommended value of the Poisson＇s ratio of this type of fly-ash brick masonry are given. The average value of shear strength of sintered hollow fly-ash brick masonry is obtained. The shear-compression composite strength formula for the average value of the sintered hollow flyash brick masonry are derived. Explore its main failure characteristics and provide basic mechanics property parameters for further study,popularization and application.