Fatigue behavior analysis and life prediction of elastic concrete and steel composite beam

被引：5

作者：

Li, Zilin ^{[1
,2
]}

Xing, Ying ^{[1
]}

Han, Qinghua ^{[1
,3
]}

Guo, Qi ^{[1
]}

机构：

[1] School of Civil Engineering, Tianjin University, Tianjin

[2] Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Institute of Urban Construction, Tianjin

[3] Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2015年 / 45卷 / 01期

关键词：

Composite structure; Elastic concrete; Fatigue behavior; Fatigue life; Numerical simulation; Stress concentration factor;

D O I：

10.3969/j.issn.1001-0505.2015.01.029

中图分类号：

学科分类号：

摘要：

Based on the results of fatigue experiments of eight composite beams, a fine finite element model and a calculation method applied for simulating slip and fatigue failure process are proposed by using the method combining finite element calculation with nominal stress approach. The effects of the different rubber contents in concrete on the ultimate bearing capacity, maximum slip, stress of stud and failure characteristics of composite beams are studied, and the corresponding stress-fatigue life curves are obtained. The results show that fatigue failure of simply supported composite beam first occurs at the end stud, and spreads in proper order. Although fatigue break is brittle failure, the general demolition of composite beams under fatigue loads has some ductility. After replacing normal concrete by elastic concrete, the ultimate bearing capacity and stiffness of composite beams decreases slightly while the ductility increases. The fatigue life increases by about 15%, 64% and 125% when the volumetric fractions of rubber are 5%, 10% and 15%, respectively. The ultimate bearing capacity and fatigue life evaluated by nonlinear numerical analysis agree well with those obtained by the fatigue tests, providing valuable references for the fatigue resistant design of composite beams. ©, 2015, Southeast University. All right reserved.

引用

页码：165 / 171

页数：6

共 10 条

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