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 : Mohammadreza Moradi (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Improving buckling response of the square steel tube by using steel foam
Moradi, Mohammadreza,Arwade, Sanjay R. Techno-Press 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.51 No.6
Steel tubes have an efficient shape with large second moment of inertia relative to their light weight. One of the main problems of these members is their low buckling resistance caused from having thin walls. In this study, steel foams with high strength over weight ratio is used to fill the steel tube to beneficially modify the response of steel tubes. The linear eigenvalue and plastic collapse FE analysis is done on steel foam filled tube under pure compression and three point bending simulation. It is shown that steel foam improves the maximum strength and the ability of energy absorption of the steel tubes significantly. Different configurations with different volume of steel foam and composite behavior is investigated. It is demonstrated that there are some optimum configurations with more efficient behavior. If composite action between steel foam and steel increases, the strength of the element will improve, in a way that, the failure mode change from local buckling to yielding.
-
Improving buckling response of the square steel tube by using steel foam
Mohammadreza Moradi,Sanjay R. Arwade 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.51 No.6
Steel tubes have an efficient shape with large second moment of inertia relative to their lightweight. One of the main problems of these members is their low buckling resistance caused from havingthin walls. In this study, steel foams with high strength over weight ratio is used to fill the steel tube tobeneficially modify the response of steel tubes. The linear eigenvalue and plastic collapse FE analysis isdone on steel foam filled tube under pure compression and three point bending simulation. It is shown thatsteel foam improves the maximum strength and the ability of energy absorption of the steel tubessignificantly. Different configurations with different volume of steel foam and composite behavior isinvestigated. It is demonstrated that there are some optimum configurations with more efficient behavior. Ifcomposite action between steel foam and steel increases, the strength of the element will improve, in a waythat, the failure mode change from local buckling to yielding.
-
Using friction dampers in retrofitting a steel structure with masonry infill panels
Seyed Mehdi Zahrai,Alireza Moradi,Mohammadreza Moradi 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.19 No.2
A convenient procedure for seismic retrofit of existing buildings is to use passive control methods, like using friction dampers in steel frames with bracing systems. In this method, reduction of seismic demand and increase of ductility generally improve seismic performance of the structures. Some of its advantages are development of a stable rectangular hysteresis loop and independence on environmental conditions such as temperature and loading rate. In addition to friction dampers, masonry-infill panels improve the seismic resistance of steel structures by increasing lateral strength and stiffness and reducing story drifts. In this study, the effect of masonry-infill panels on seismic performance of a three-span four-story steel frame with Pall friction dampers is investigated. The results show that friction dampers in the steel frame increase the ductility and decrease the drift (to less than 1%). The infill panels fulfill their function during the imposed drift and increase structural strength. It can be concluded that infill panels together with friction dampers, reduced structural dynamic response. These infill panels dissipated input earthquake energy from 4% to 10%, depending on their thickness.
-
Ali Hosseinian Naeini,Mohammadreza Kalaee,Omid Moradi,Ramin Khajavi,Majid Abdouss 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.8
Biopolymers, such as Carboxyl methylcellulose (CMC) and Guar gum (GG), have attracted much attention. Herein, binary organic composite (Carboxyl methyl cellulose - Guar gum) and ternary inorganic-organic ecofriendlybionanocomposite (Copper oxide - Carboxyl methyl cellulose - Guar gum) with different wt% of CuO (1%,3%, and 5% denoted as CMC/GG/CuO-1, CMC/GG/CuO-3, and CMC/GG/CuO-5) were prepared. The CMC, GG,CuO, CMC/GG, CMC/GG/CuO-1, CMC/GG/CuO-3, and CMC/GG/CuO-5 were characterized by XRD, FTIR, SEM,and EDX and used to remove malachite green (MG) dye from water. The effect of operational parameters on theadsorption process was investigated in detail. The maximum dye capacity was 18.5mg/g. The isotherm data showedthe Freundlich isotherm, which indicated the non-uniformity of adsorption on the adsorbent surface. Pollutant removalfollowed the pseudo-second-order kinetics. Also, the thermodynamic study presented that adsorption was spontaneousand endothermic.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
