疲劳后不同植筋深度植筋梁的剩余寿命分析  

Remaining Life Analysis on Anchorage Beam Under Different Rebar Planted Depth After Fatigue Load

作　　者：庞玉松 陈培 邢婷婷[3] 蔡玉康 魏兴磊 董成 PANG Yusong1, CHEN Pei1,2, XING Tingting3, CAI Yukang1, WEI Xinglei4, DONG Cheng5(1. School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China ; 2. Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China ; 3. School of Economics and Management, Hebei University of Technology, Tianjin 300401, China ; 4. Tianjin Sunco New Real Estate Co. , Ltd. , Tianjin 300300, China ; 5. Hebei University of Water Resources and Electric Engineering, Cangzhou, Hebei 061001, China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]河北省土木工程技术研究中心,天津300401 [3]河北工业大学经济管理学院,天津300401 [4]天津顺驰新地置业有限公司,天津300300 [5]河北水利电力学院,河北沧州061001

出　　处：《施工技术》2018年第9期96-100,共5页Construction Technology

基　　金：河北省研究生创新资助项目(CXZZSS2017029)

摘　　要：植筋技术是一种被广泛应用于工程界的连接锚固技术。通过对植筋深度分别为20d,25d,30d(d为植筋直径)的混凝土植筋梁进行疲劳荷载作用下的受弯试验研究,引入了残余应变和损伤变量的概念,并建立了两者之间的数学关系。研究表明:裂缝多出现在疲劳加载前的静载阶段,疲劳损伤主要发生在前50万次加载过程;增大植筋深度可减小梁的疲劳损伤;基于残余应变建立植筋梁累计损伤方程,计算出损伤量后,已知植筋深度可对植筋梁的剩余疲劳寿命做出定量计算。Rebar-planting technology is widely used in the engineering field for connect anchor technology. Three rebar-planting beams with different planting depths are tested,and the planting depth are respectively 15 d,20 d,25 d（ d is the diameter of rebar）,which introduce the concept of residual strain and damage variable and establish a mathematical relationship between them. Research shows that：many cracks appear in the static load test phase,the fatigue damage of the beams mainly occur in the first500 000 times fatigue loading process; increasing planting depth can reduce the fatigue damage of the beam. After calculating the damage amount by cumulative damage equation based on residual strain of rebar-planting beam,planted depth is known for remaining fatigue life calculation of rebar beam.

关 键 词：混凝土 梁 植筋深度 疲劳荷载 疲劳寿命 

分 类 号：TU375.1[建筑科学—结构工程]