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Stress-Strain Relationship and Failure Criterion for Concrete after Freezing and Thawing Cycles 被引量:5

Stress-Strain Relationship and Failure Criterion for Concrete after Freezing and Thawing Cycles
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摘要 The research of the failure criterion and one-dimensional stress-strain relationship of deteriorated concrete were carried out. Based on the damage mechanics theory, the dsmage which reflects the alternation of internal state of material were introduced into the formula presented by Desayi and Krishman and the weighted twin-shear strength theory. As a nondestructive examination method in common use, the ultrasonic technique was adopted in the study, and the ultrasonic velocity was used to establish the damage variable. After that, the failure criterion and one-dimensional stress-strain relationship for deteriorated concrete were obtained. Eventually, tests were carried out to study the evolution laws on the damage. The results show that the more freezing and thawing cycles are, the more apparently the failure surface shrinks. Meanwhile, the comparison between theoretical data and experimental data verifies tile rationality of tile damage-based one-dimensional stress-strain relationship proposed. The research of the failure criterion and one-dimensional stress-strain relationship of deteriorated concrete were carried out. Based on the damage mechanics theory, the dsmage which reflects the alternation of internal state of material were introduced into the formula presented by Desayi and Krishman and the weighted twin-shear strength theory. As a nondestructive examination method in common use, the ultrasonic technique was adopted in the study, and the ultrasonic velocity was used to establish the damage variable. After that, the failure criterion and one-dimensional stress-strain relationship for deteriorated concrete were obtained. Eventually, tests were carried out to study the evolution laws on the damage. The results show that the more freezing and thawing cycles are, the more apparently the failure surface shrinks. Meanwhile, the comparison between theoretical data and experimental data verifies tile rationality of tile damage-based one-dimensional stress-strain relationship proposed.
作者 罗昕 卫军
出处 《Journal of Southwest Jiaotong University(English Edition)》 2006年第3期265-271,共7页 西南交通大学学报(英文版)
基金 FoundationitemTheNationalScienceFoundationofChina(No.50578068)
关键词 CONCRETE DAMAGE Stress-strain relationship Strength theory Freezing and thawing cycles Supersonic velocity Concrete Damage Stress-strain relationship Strength theory Freezing and thawing cycles Supersonic velocity
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