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为研究型钢轻骨料混凝土梁的剪切性能,进行了15根型钢轻骨料混凝土梁和2根型钢普通混凝土梁的抗剪性能试验。试验表明,在型钢混凝土梁中配置一定的箍筋可避免剪切粘结破坏的发生;本次试验的17根试验梁中有7根发生斜压破坏,10根发生剪压破坏。与文献[1]的试验共同表明,剪跨比对试验梁的破坏形态具有决定性的影响;当剪跨比λ≤1.5时发生斜压破坏;剪跨比1.5<λ≤3.0时发生剪压破坏;剪跨比λ>3.0时发生弯曲破坏;同时型钢的存在使得受剪破坏时的脆性性能得到较大改善。
In order to study the shear properties of SRC beams, the shear resistance of 15 SRC beams and 2 SRC beams was tested. Experiments show that the stirrups in the SRC beams can avoid the shear bond failure. Seven barrels of 17 test bars in this test are under baroclinic failure and 10 are subjected to shear failure. Together with the test [1], it is shown that the shear span ratio has a decisive influence on the failure mode of the test beam. When the shear span ratio λ≤1.5, baroclinic failure occurs, and shear failure occurs when the shear span ratio is less than 1.5 ; When the shear span ratio λ> 3.0, bending failure occurs; at the same time, the presence of profiled steel makes the brittleness properties greatly improved when shearing failure occurs.