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- 저자 : Yuntian Wu (검색결과 3 건)
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Nonlinear Optimization for Geometric Parameters of Reinforced Concrete Coupled Structural Walls
Yuntian Wu,Bin Wang,Yeongbin Yang,Junjie Fu 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.10
The coupling ratio (CR) has been widely used to quantitatively reflect the degree of coupling action between the component walls and link beams of a coupled wall. However, the CR index is very difficult to evaluate at early design stages. In order to develop alternative design parameters that can be easily utilized and ensure the dual lateral force resisting mechanism of coupled walls, nine prototype coupled walls were designed considering various aspect ratios of wall pier (αw) and span-to-depth ratios of coupling beams (αb). The incremental dynamic analyses on the seismic fragility was conducted to examine the influences of αw and αb on the fragility characteristics and the margin capacities corresponding to different performance limit states. The double-factorial quadratic response surface method was used to further reveal the interactive impact of αw and αb on the overall behavior of coupled walls. Then the combinations of αw and αb that can produce the optimal values of response variables were obtained. The curve-fitting technique was used to find the relationship between optimal αb and αw. It is indicated that αb and αw can effectively serve as the alternative parameters to CR and ensure optimal overall structural performance of RC coupled walls.
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Bolted end plate connections for steel reinforced concrete composite structures
Li, Xian,Wu, Yuntian,Mao, Weifeng,Xiao, Yan,Anderson, J.C.,Guo, Yurong Techno-Press 2006 Structural Engineering and Mechanics, An Int'l Jou Vol.24 No.3
In order to improve the constructability and meanwhile ensure excellent seismic behavior, several innovative composite connection details were conceived and studied by the authors. This paper reports experimental results and observations on seismic behavior of steel beam bolted to reinforced concrete column connections (bolted RCS or BRCS). The proposed composite connection details involve post tensioning the end plates of the steel beams to the reinforced concrete or precast concrete columns using high-strength steel rods. A rational design procedure was proposed to assure a ductile behavior of the composite structure. Strut-and-tie model analysis indicates that a bolted composite connection has a favorable stress transfer mechanism. The excellent capacity and behavior were then validated through five full-scale beam to column connection model tests.
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The Vibration Isolation Technologies of Load in Aviation and Navigation
Zhang Bing,Teng Yuntian,Xing Lili,Wu Qiong 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.12
Now, most of the instrument has become more precise, light-weight and portable so that the influence of the natural vibration and environmental noise confirms growing role in the instrument performance. The vibration source and the correspondent vibration isolation technologies were analyzed in the paper to provide theoretical reference for the vibration of the laser interference absolute gravimeter and theoretical guidance for the application of absolute gravimeter to the aviation and navigation.
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