高强次轻混凝土梁抗剪性能试验研究

通过5根高强次轻混凝土有、无腹筋梁和1根高强轻集料混凝土梁、1根普通混凝土简支梁在集中荷载作用下的抗剪性能试验，研究了剪跨比对高强次轻混凝土构件抗剪性能的影响。结果表明，高强次轻混凝土梁比轻集料混凝土梁的抗剪承载力有较大的提高，且比普通混凝土梁的抗剪强度大；与普通混凝土梁一样，其极限抗剪承载力随着剪跨比的增加而降低，并具有相同的破坏形式；剪切破坏时呈脆性破坏。

Experimental Investigation on Shear Capacity of Reinforced High-strength Specified Density Concrete Beams

An experimental investigation was conducted to study the capacity of shear-critical reinforced concrete beams of high-strength specified density concrete subjected to concentrated loads.The effect of shear span ratio on shear strength was researched through the tests of 5 high-strength specified density concrete beams with and without web bars,one lightweight concrete and one normalweight concrete beam.The tests indicated that the ultimate shear strength of it was a little larger than normal-weight concrete beam's,and larger than lightweight concrete beam.As the same as normal-weight concrete beam,the ultimate shear strength of specified density concrete beams decreased with the increase of the shear-span ratio,and had the same failure mode.The high-strength specified density concrete beams were brittleness when failure.