Constitutive Model for Cracked and Frost-damaged Reinforced Concrete Elements under Uniaxial Compression
Mechanical behavior of reinforced concrete (RC) members, such as load-carrying capacity as well as failure modes, varies significantly with spatial distribution of frost damage.To assess structural performance of existing RC structures under different levels of frost damage, hence, Non-Linear Finite Element Analysis (NLFEA) can be a powerful tool.However, the changes in load-carrying capacity and/or failure modes are not well reproduced by NLFEA unless appropriate constitutive models are installed.This study presents a new constitutive model for cracked and frost-damaged RC elements under uniaxial compression with respect to the correlation between freeze-thaw induced damage and presence of reinforcing bars.39 prismatic elements after freeze-thaw exposure were tested under different directions of compression load relative to the direction of reinforcing bars.The experiment demonstrated that RC elements exhibited the anisotropy both in expansion as well as compression response whereas plain concrete elements did not show such a behavior.To consider the anisotropy in NLFEA, an average stress-strain relationship was formulated and compared with the test results.
T.Kanazawa Y.Sato
Hokkai Gakuen University-Japan Waseda University-Japan
国际会议
福州
英文
983-991
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）