نوع مقاله : مقاله پژوهشی
نویسندگان
1 عضو هیئت علمی دانشگاه کردستان
2 دانشجوی دکتری سازه، دانشکده مهندسی، دانشگاه کردستان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In recent years, the confinement effect in high strength concrete (HSC) has been studied by many researchers. Confinement effect results in increasing the strength and ductility of concretes columns considerably . To determine the amount of these increases and to simulate the behavior of these columns a compressive stress strain model containing the confinement effect is essential . In this paper , a number of well known stress strain models are evaluated against experimental data obtained by other researchers and their shortages are determined . Considering compressive strength, the modulus of elasticity , the strain corresponding to maximum stress and confinement stress are considered as main parameters , a new stress-strain model is developed such that it takes into account the effects of confinement . Comparing the results predicted by the proposed model with experimental results for a wide range of compressive strength from 20 to 120 MPa, show a good agreement .
کلیدواژهها [English]
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