钢纤维聚合物高强混凝土疲劳性能的实验研究

Experimental Study of Fatigue Performance of Steel Fiber Reinforced Polymer High Strength Concrete

钢纤维聚合物高强混凝土(SPHC)是本课题组最近研发的新型混凝土桥梁结构材料。为了探明SPHC的疲劳性能,本文采用对比分析的方法,对实桥上应用的SPHC及其静力学性能相近的C60混凝土的疲劳性能展开实验研究,得到了这两种材料的S-N实验曲线。研究结果表明,与C60混凝土相比,SPHC材料由于掺入了钢纤维和聚合物乳胶,增加了韧性及抗裂性能,使其抗疲劳性能得到了大幅度的提高。该新材料的实桥应用,将有效地提高桥梁结构的疲劳寿命。

Steel fiber reinforced polymer high strength concrete（SPHC）,a new type of concrete bridge material,was recently developed by our research group.In order to clarify the fatigue performance of SPHC,comparative analysis method was adopted to experimentally study SPHC applied in a real bridge and the C60 concrete that has similar static mechanical properties as SPHC.Furthermore,experimental S-N curves of above mentioned two materials were obtained.Results show that comparing with C60 concrete,the fatigue performance of SPHC material has greatly enhanced.Its toughness and crack resistance increase due to the incorporation of steel fiber and polymer latex.The application of this new material will effectively improve the fatigue life of bridge structure.