论文部分内容阅读
通过试验研究了偏心受压混凝土夹心秸秆块砌块砌体的开裂荷载、破坏过程、破坏形态和极限荷载。试验结果表明:内置秸秆块可以提高块材与砂浆的接触作用,增强试件的整体性,与空心砌块砌体相比极限承载力按偏心距由小到大(0mm、36mm、72mm)分别提高2.3%、5.9%、2.5%;偏心受压试件在受荷全过程所对应的竖向变形受压侧均大于受拉侧;受压侧平面外挠度值随偏心距的增加而增加。在试验研究基础上,通过理论分析与比较,明晰了混凝土夹心秸秆块砌块砌体轴心抗压强度的计算方法;在计算混凝土夹心秸秆块砌块砌体偏心受压承载力时,规范计算方法偏于保守,内置秸秆块可进一步提高安全储备。
Cracking load, failure process, failure mode and ultimate load of eccentric compressed concrete sandwich straw block masonry are studied through experiments. The results show that the built-in straw block can increase the contact between the block and the mortar and enhance the integrity of the sample. Compared with the hollow block masonry, the ultimate bearing capacity of the block according to the eccentricity from small to large (0mm, 36mm, 72mm) Increase by 2.3%, 5.9% and 2.5% respectively. The compression deformation of the specimens subjected to eccentric compression is greater than that of the tensioned specimens in the whole process of loading. The deflection value of the compression surface increases with the increase of eccentricity. On the basis of experimental research, through the theoretical analysis and comparison, the calculation method of the axial compressive strength of concrete sandwich straw block masonry was clarified. When calculating the eccentric compression bearing capacity of concrete sandwich straw block masonry, Method is conservative, built straw block can further improve the safety reserve.