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 : Chengqing Wu (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Jie Li,Weiqiang Wang,Chengqing Wu,Zhongxian Liu,Pengtao Wu 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.42 No.3
This paper studies the lateral impact behavior of ultra-high performance fiber-reinforced concrete (UHPFRC) filled double-skin steel tubular (UHPFRCFDST) columns. The impact force, midspan deflection, and strain histories were recorded. Based on the test results, the influences of drop height, axial load, concrete type, and steel tube wall thickness on the impact resistance of UHPFRCFDST members were analyzed. LS-DYNA software was used to establish a finite element (FE) model of UHPFRC filled steel tubular members. The failure modes and histories of impact force and midspan deflection of specimens were obtained. The simulation results were compared to the test results, which demonstrated the accuracy of the finite element analysis (FEA) model. Finally, the effects of the steel tube thickness, impact energy, type of concrete and impact indenter shape, and void ratio on the lateral impact performances of the UHPFRCFDST columns were analyzed.
-
Yang He,Zhiwei Guo,Wu Ouyang,Chengqing Yuan 한국섬유공학회 2022 Fibers and polymers Vol.23 No.6
Ultra-high molecular weight polyethylene (UHMWPE) has great potential in the field of water-lubricatedbearings. However, water-lubricated bearing made of pure UHMWPE produce significant heat and undergo physical damageunder low speed and heavy load conditions. These performance issues can be improved by reinforcement with fibers thathave excellent complementary properties to UHMWPE. Polyester fibers (PETFs) have high compressive strength and wearresistance, and corresponding oriented-fiber-reinforced-composites (OFRCs) wherein PETF acts as reinforcement show evenbetter mechanical and tribological properties. In this study, the influence of PETF density on UHMWPE was investigated bysystematic testing of different OFRCs. The results show that the optimal fiber density of composites with PETF orientedalong the axial direction was between 1.1 wt% and 2.2 wt%, and that for heavy loads, performance deteriorated withincreasing fiber density. Compared with UHMWPE, OFRCs with the optimal fiber density obtained from this study reducedfriction coefficient by up to 25.93 % and wear volume by 22.67 %, respectively. Considering the low cost, high durability,and relatively low content (<2.2 wt%) necessary for enhanced properties, reinforcement with oriented PETF is a viableapproach to enhance water lubrication performance of UHMWPE.
-
Wanruo Chen,Yongshan Zhang,Dayang Wang,Chengqing Wu 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.6
Seismic safety is considered to be one of the key design objectives of AP1000 nuclear power plant (NPP)in strong earthquakes. Dynamic behavior, damage development and aggravation effect are studied in thisstudy for the three main components of AP1000 NPP, namely reinforced concrete shield building (RCSB),steel vessel containment (SVC) and reinforced concrete auxiliary building (RCAB). Characteristicsincluding nonlinear concrete tension and compressive constitutions with plastic damage are employedto establish the numerical model, which is further validated by existing studies. The author investigatesthree earthquakes and eight input levels with the maximum magnitude of 2.4 g and the results showthat the concrete material of both RCSB and RCAB have suffered serious damage in intense earthquakes. Considering RCAB in the whole NPP, significant damage aggravation effect can be detected, which ismainly concentrated at the upper intersection between RCSB and RCAB. SVC and reinforcing bardemonstrate excellent seismic performance with no obvious damage.
-
Can Mei,Zhendong Zhao,Yongshan Zhang,Dayang Wang,Chengqing Wu 대한토목학회 2021 KSCE Journal of Civil Engineering Vol.25 No.8
This paper investigates the impact of configuration parameters on the seismic performance of the modular prefabricated two-side connected composite shear wall. Firstly, the finite element model of the modular prefabricated two-side connected composite shear wall was established and validated by Xu’s experimental results. Secondly, three aspects of parameter investigationswere discussed in detail based on the validated numerical technology, namely the design parameter of ISP, design parameter of the stud, and design parameter of reinforced concrete faceplate (RCF). Then, the computation formula of shear capacity is deduced on the basis of the finite element model for reference to structural design. The results of parameter analysis displayed that the seismic performance of the modular prefabricated two-side connected composite shear wall has excellent seismic performance with the array studs of the length-diameter ratio of 4 which the center distance of 150 mm, and RCF with the thickness of 75 mm. A satisfactory but unadventurous estimation of the shear capacity of a modular prefabricated two-side connected composite shear wall is supplied by the advised technique.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
