腐蚀和疲劳耦合作用下纤维混凝土的力学性能  

Mechanical Properties of Fiber Reinforced Concrete under the Coupling of Corrosion and Fatigue

作　　者：吴永根[1] 蔡良才[1] 龙小勇 李文哲 吴豪祥 WU Yong-gen;CAI Liang-cai;LONG Xiao-yong;LI Wen-zhe;WU Hao-xiang(Airforce Engineering University,Xi’an 710038,China;People’s Armed Police Academy,Beijing 100010,China)

机构地区：[1]空军工程大学,西安市710038 [2]武警部队研究院,北京市100010

出　　处：《公路》2020年第9期237-245,共9页Highway

摘　　要：采用响应面(RSM)、设计专家和中心复合设计(CCD)软件研究了腐蚀和疲劳耦合作用下道面混凝土的力学性能。建立了抗折强度耐损系数Sf、抗压强度耐损系数Sc以及相对动弹模量Pn的响应面模型,并基于模型分析了疲劳加载次数、硫酸盐干湿循环次数、纤维掺量及其相互作用对Sf、Sc和Pn的影响规律。结果表明,响应面模型拟合良好,在一系列的疲劳和腐蚀循环后,很好地反映了高性能合成纤维道面混凝土的实际服役特点。对Sf和Pn的影响显著性排序均为:疲劳加载次数>硫酸盐干湿循环次数>纤维掺量,而对Sc的影响显著性排序为:硫酸盐干湿循环次数>纤维掺量>疲劳加载次数。疲劳加载次数与硫酸盐干湿循环次数的交互作用对Sc和Pn的影响最显著,而这三个因素之间的交互作用对Sf的影响不明显。Response surface methodology(RSM),design experts and central composite design(CCD)software are used to study the mechanical properties of high performance synthetic fiber pavement concrete under the coupling effects of corrosion and fatigue.RSM models about flexural strength endurance coefficient Sf,compressive strength endurance coefficient Sc and relative dynamic modulus Pn are established.The effects of fatigue iteration times,sulfate dry-wet cycles,fiber content and interaction on Sf,Scand Pnare analyzed based on the models.The results show that RSM models fit well and can well reflect the actual working characteristics of high performance synthetic fiber pavement concrete after a series of fatigue and corrosion cycles.The sequence of significant effects on Sfand Pnis fatigue iteration times>sulfate dry-wet cycle times>fiber content,and the sequence of significant effects on Scis sulfate dry-wet cycle times>fiber content>fatigue iteration times.The effect on Sc,Pnis most significant under the coupling of corrosion times and fatigue iteration times,but the effect on Sfunder the interaction among the three factors is not obvious.

关 键 词：纤维混凝土 高性能合成纤维 腐蚀和疲劳耦合 力学性能 响应面法 

分 类 号：U414.01[交通运输工程—道路与铁道工程]