钢纤维部分增强高强混凝土梁疲劳性能的试验研究

通过1根普通高强混凝土梁和3根钢纤维高强混凝土梁的疲劳试验,分析了疲劳荷载作用下钢纤维部分增强高强混凝土梁跨中挠度及裂缝宽度随循环次数增加的变化规律,探讨了钢纤维掺入层厚对钢纤维高强混凝土梁跨中挠度及裂缝宽度的影响.结果表明,在高强混凝土梁中部分掺加钢纤维能够有效地控制梁的刚度及限制裂缝的发展,疲劳抗裂性能及变形性能随着钢纤维混凝土层厚的增加而提高.

Experimental Study on Fatigue Property of Steel Fiber Partly Reinforced High-strength Concrete Beams

Based on the fatigue test of 1 high-strength concrete beam and 3 steel fiber reinforced high-strength concrete beams,the development law of deflection and crack width with the increasing loading cycles are discussed in the paper,and the influences of the depth of steel fiber layer on deflection and crack width under static and fatigue loads are investigated.The results show that adding steel fiber into the high-strength concrete beams can control the stiffness effectively and restrict the development of cracks;the deformation performance and fatigue cracking resistance would be improved along with the increase of depth of steel fiber layer.