http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Amir Ali Shahmansouri (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Armin Memarzadeh,Amir Ali Shahmansouri,Keerthan Poologanathan 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.44 No.3
The post-fire elastic stiffness and performance of concrete-filled steel tube (CFST) columns containing recycled aggregate concrete (RAC) has rarely been addressed, particularly in terms of material properties. This study was conducted with the aim of assessing the modulus of elasticity of recycled aggregate concrete-filled steel tube (RACFST) stub columns following thermal loading. The test data were employed to model and assess the elastic modulus of circular RACFST stub columns subjected to axial loading after exposure to elevated temperatures. The length/diameter ratio of the specimens was less than three to prevent the sensitivity of overall buckling for the stub columns. The gene expression programming (GEP) method was employed for the model development. The GEP model was derived based on a comprehensive experimental database of heated and non-heated RACFST stub columns that have been properly gathered from the open literature. In this study, by using specifications of 149 specimens, the variables were the steel section ratio, applied temperature, yielding strength of steel, compressive strength of plain concrete, and elastic modulus of steel tube and concrete core (RAC). Moreover, parametric and sensitivity analyses were also performed to determine the contribution of different effective parameters to the post-fire elastic modulus. Additionally, comparisons and verification of the effectiveness of the proposed model were made between the values obtained from the GEP model and the formulas proposed by different researchers. Through the analyses and comparisons of the developed model against formulas available in the literature, the acceptable accuracy of the model for predicting the post-fire modulus of elasticity of circular RACFST stub columns was seen.
-
A review on fire resistance of steel-concrete composite slim-floor beams
Armin Memarzadeh,Amir Ali Shahmansouri,Mahdi Nematzadeh,Aliakbar Gholampour 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.40 No.1
The use of steel-concrete composites (SCCs) is growing rapidly in the construction industry because of their improved constructability, decreased labor cost, improved bond to reinforcing steel, improved structural integrity and accelerated project schedules compared to conventional composites. Fire is a constant danger to these structural composites. Therefore, the effect of fire on the behavior of SCCs must be evaluated and included in design provisions. Slim-floor beams (SFBs) are cost-effective systems which permit a major decrease in the thickness of industrial and commercial buildings floors. The present study reviews the recent advancements and history of SCCs together with recent studies investigating the fire performance of SFBs. First, the evolution of SCC systems is briefly discussed. Then, the fire resistance and specific thermal definitions of the main structural members are presented. Finally, analytical and numerical methods for predicting fire resistance, as well as the relevant experimental results are presented. The main focus of this study is on analyzing the performance of SFBs as a flooring system under fire. It is found that further investigation is required to improve Eurocode 4 provisions for enabling the rapidly growing construction industry to benefit from the advantages provided by composite construction methods with safety considerations. Numerous studies have so far been conducted in terms of enhancing the design quality of these systems, among which some will be discussed in this study.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
