Experimental Study on the Fatigue Damage of High Strength Concrete under Uniaxial Compression

2014 ◽  
Vol 619 ◽  
pp. 109-115
Author(s):  
Li Hui Yin ◽  
Zong Lin Wang ◽  
Yang Liu
Keyword(s):  
Uniaxial Compression ◽  
Fatigue Damage ◽  
Fatigue Failure ◽  
High Strength Concrete ◽  
Damage Model ◽  
Correlation Coefficients ◽  
High Strength ◽  
Damage Variable ◽  
Strength Concrete ◽  
Recycle Ratio

This paper presents the results of a study on the fatigue damage of high strength concrete under uniaxial compression. Based on the experimental data, the change laws of fatigue strain and fatigue modulus are put forward. According to the experimental requests, the numerical value of fatigue strain and fatigue modulus when the fatigue failure of concrete occurs can be regarded as the criteria for fatigue failure of concrete. Then the paper presents a fatigue damage model. By reference to the concept about the damage variable defined by some scholars, the formula of the damage variable is proposed and the damage variable curves varying with recycle ratio (n%) are mapped. At last, the fitting curves of the damage variable varying with recycle ratio are proposed. The fitting effect is very good and the correlation coefficients are above 0.95.

scholarly journals Damage Analysis and Evaluation of High Strength Concrete Frame Based on Deformation-Energy Damage Model

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Huang-bin Lin ◽  
Shou-gao Tang ◽  
Cheng Lan
Keyword(s):  
High Strength Concrete ◽  
Damage Model ◽  
High Strength ◽  
Deformation Energy ◽  
Model Parameters ◽  
Force Model ◽  
Damage Evaluation ◽  
Cycle Number ◽  
Strength Concrete ◽  
Unloading Stiffness

A new method of characterizing the damage of high strength concrete structures is presented, which is based on the deformation energy double parameters damage model and incorporates both of the main forms of damage by earthquakes: first time damage beyond destruction and energy consumption. Firstly, test data of high strength reinforced concrete (RC) columns were evaluated. Then, the relationship between stiffness degradation, strength degradation, and ductility performance was obtained. And an expression for damage in terms of model parameters was determined, as well as the critical input data for the restoring force model to be used in analytical damage evaluation. Experimentally, the unloading stiffness was found to be related to the cycle number. Then, a correction for this changing was applied to better describe the unloading phenomenon and compensate for the shortcomings of structure elastic-plastic time history analysis. The above algorithm was embedded into an IDARC program. Finally, a case study of high strength RC multistory frames was presented. Under various seismic wave inputs, the structural damages were predicted. The damage model and correction algorithm of stiffness unloading were proved to be suitable and applicable in engineering design and damage evaluation of a high strength concrete structure.

Preloaded RC columns strengthened with high-strength concrete jackets under uniaxial compression

2007 ◽  
Vol 41 (7) ◽  
pp. 1251-1262 ◽  
Author(s):  
Adilson Roberto Takeuti ◽  
Joao Bento de Hanai ◽  
Amir Mirmiran
Keyword(s):  
Uniaxial Compression ◽  
High Strength Concrete ◽  
High Strength ◽  
Rc Columns ◽  
Strength Concrete

Damage Model for Monotonic and Fatigue Response of High Strength Concrete

2000 ◽  
Vol 9 (1) ◽  
pp. 57-78 ◽  
Author(s):  
A. H. Al-Gadhib ◽  
M. H. Baluch ◽  
A. Shaalan ◽  
A. R. Khan
Keyword(s):  
High Strength Concrete ◽  
Damage Model ◽  
High Strength ◽  
Strength Concrete

scholarly journals Mode II Behavior of High-Strength Concrete under Monotonic, Cyclic and Fatigue Loading

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7675
Author(s):  
Henrik Becks ◽  
Martin Classen
Keyword(s):  
Fatigue Life ◽  
Compressive Stress ◽  
Fatigue Damage ◽  
High Strength Concrete ◽  
High Strength ◽  
Fatigue Loading ◽  
Mode Ii ◽  
Shear Tests ◽  
Strength Concrete ◽  
Mode Ii Loading

An economically efficient yet safe design of concrete structures under high-cycle fatigue loading is a rather complex task. One of the main reasons is the insufficient understanding of the fatigue damage phenomenology of concrete. A promising hypothesis states that the evolution of fatigue damage in concrete at subcritical load levels is governed by a cumulative measure of shear sliding. To evaluate this hypothesis, an experimental program was developed which systematically investigates the fatigue behavior of high-strength concrete under mode II loading using newly adapted punch through shear tests (PTST). This paper presents the results of monotonic, cyclic, and fatigue shear tests and discusses the effect of shear-compression-interaction and load level with regard to displacement and damage evolution, fracture behavior, and fatigue life. Both, monotonic shear strength and fatigue life under mode II loading strongly depend on the concurrent confinement (compressive) stress in the ligament. However, it appears that the fatigue life is more sensitive to a variation of shear stress range than to a variation of compressive stress in the ligament.

Damage Model for Monotonic and Fatigue Response of High Strength Concrete

2000 ◽  
Vol 9 (1) ◽  
pp. 57-78 ◽  
Author(s):  
A. H. AL-GADHIB ◽  
M. H. BALUCH ◽  
A. SHAALAN ◽  
A. R. KHAN
Keyword(s):  
High Strength Concrete ◽  
Damage Model ◽  
High Strength ◽  
Strength Concrete

Microstructural analysis to uniaxial low cyclic compression of high-strength concrete after high temperature

2018 ◽  
Vol 22 (3) ◽  
pp. 779-791
Author(s):  
Dongfu Zhao ◽  
Penghe Jia ◽  
Pingying Hou ◽  
Huixuan Liu ◽  
Rundong Zhao ◽  
...  
Keyword(s):  
High Temperature ◽  
Fatigue Damage ◽  
High Strength Concrete ◽  
Fatigue Testing ◽  
Low Cycle Fatigue ◽  
Microstructural Analysis ◽  
High Strength ◽  
Strength Concrete ◽  
Microstructural Parameters ◽  
The Relationship

The uniaxial compressive cycling tests of high-strength concrete after high temperature under different stress were carried out using the electrohydraulic servo-controlled fatigue testing system. The investigation focused on low-cycle fatigue to figure out the relationship between microstructural development and number of cycles. The variation in microstructure during uniaxial compressive fatigue process was systematically analyzed and compared using ultrasonic, micro-hardness test, mercury intrusion porosimetry, and scanning electron microscopy. It is found that at the same life ratio, the cumulative fatigue damage caused by the lower stress is greater than that caused by the higher stress, and the four kinds of test methods used to measure the microstructure are consistent, interrelated, and confirmed with each other well. Through the nonlinear regression analysis of fatigue residual strain and microstructural parameters, the relationship models between them were established. Furthermore, the fatigue damage models based on microstructural parameters were established. On this basis, both the dynamic evolution process and damage mechanism of microstructure during uniaxial compressive fatigue were further revealed.

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