摘要
N式砌块是一种可实现孔、肋完全对齐的新型混凝土小型砌块。该文通过四组(24个)不同灌孔率N式砌块砌体的抗剪性能试验研究,对其受力性能和破坏机理进行了分析,建立了灌孔砌块以芯柱混凝土受力的梁式抗剪模型,并提出了相应计算公式。分析表明,以该文的抗剪强度计算公式来计算灌孔砌块的抗剪强度无论是从计算精度还是从公式的物理意义上都优于现有以灌孔砌体的抗压强度来表征灌孔砌体抗剪强度的规范计算公式。基于梁式抗剪模型的计算公式可以很好地应用于各种块形的灌孔砌体的抗剪强度计算。
Four groups （24 specimens） of N-type block masonry with different grouted rates have been investigated on the performance of shear resistance. According to the shear-test phenomena and failure shape of specimens, the paper has established a beam-type shear resistance model with the consideration of the loaded core column concrete, and also provided related calculation formula. The shear strength of grouted block masonry was computed by the shear strength calculation formula, which was better than the formula in present code that expressed grouted masonry shear strength with the compression strength of grouted masonry. The shear strength calculation formula based on the beam-type shear resistance model can be applicable for grouted masonry with different block types.
出处
《工程力学》
EI
CSCD
北大核心
2010年第8期140-145,151,共7页
Engineering Mechanics
基金
国家985工程项目(5218D5020003)
国家自然科学基金(50808074)
教育部新教师基金(2008D5321044)
2009教育部创新团队项目
关键词
灌孔砌块砌体
抗剪强度
梁式抗剪模型
N式砌块
破坏机理
grouted block masonry
shear-resistance strength
beam type shear resistance model
N-type block
failure mechanism
