变幅重复荷载下混凝土梁斜截面抗剪试验研究

Test Research of Shear Strength for R.C. Beams under Varying Amplitude Repeated Loading

本文研究了配有弯起钢筋的混凝土梁斜截面抗剪性能。通过试验，得出了该构件在变幅重复荷载作用下斜截面的破坏特点，箍筋和弯筋应力随疲劳荷载的变化情况，及斜截面上弯筋和箍筋应力分布及相互关系。同时，讨论了加载历程对斜截面疲劳性能的影响，从而为混凝土梁斜截面抗剪强度的理论分析提供了依据。

In this paper,the shear features of inclined section of the R.C. beams with the bent up bars are discussed.The damage features of inclined section of the beams under varying amplitude loading,the change of stresses of stirrup and bent up bar corresponding to the fatigue loads and the distribution and relationship between the stresses of inclined sections of stirrup and bent up bar are obtained through the tests.Meanwhile,the influence of loading process on the fatigue behavior of inclined section is studied to supply the scientific basis for the theoretic analysis of the shear strength of inclined section of R.C. beams.