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- 저자 : Yushuai Zhao (검색결과 3 건)
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Numerical study on tensioned membrane structures under impact load
Yingying Zhang,Yushuai Zhao,Mingyue Zhang,Yi Zhou,Qilin Zhang 국제구조공학회 2019 Structural Engineering and Mechanics, An Int'l Jou Vol.71 No.2
This paper presents the numerical simulation of membrane structure under impact load. Firstly, the numericalsimulation model is validated by comparing with the test in Hao’s research. Then, the effects of the shape of the projectile, themembrane prestress and the initial impact speed, are investigated for studying the dynamic response and failure mechanism, basedon the membrane displacement, projectile acceleration and kinetic energy. Finally, the results show that the initial speed and thepunch shape are related with the loss of kinetic energy of projectiles. Meanwhile, the membrane prestress is an important factor thataffects the energy dissipation capacity and the impact resistance of membrane structures.
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Yingying Zhang,Penghao Yu,Baorui Sun,Yi Zhou,Peijian Chen,Junhao Xu,Yushuai Zhao 대한토목학회 2024 KSCE Journal of Civil Engineering Vol.28 No.2
This paper investigated the seismic performance of a typical “Integrated Station-Bridge high-speed railway station structure with a composite isolation system. The influential mechanism of the structure with isolation system was analyzed based on shaking table tests, mainly investigating on the failure mode, acceleration response and displacement response. Besides, a parameter optimization method of isolation layer for long-span structures was proposed based on genetic algorithm to better enhance the isolation performance of the large-span structure. The research revealed that there was no obvious damage to the composite isolation system under the PGA = 0.82 g. The nature frequency of the structure with isolation system is only 12.5% of that of non-isolation structure. The first three natural vibration frequency of the structure with isolation system only reduce 3.4%, 3.2%, 6.14% after the PGA = 1.27 g, that of the non-isolation structure reduce by more than 20%. The acceleration amplification factor of each layer of composite isolation system is less than 1, in particular, that of truss is about 0.3. The displacement response and acceleration response of the structure with isolation system have been reduced by about 90%. The proposed optimization method of isolation layer parameters provides an important reference for the isolation design for high-speed railway stations.
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Mechanical properties of new stainless steel-aluminum alloy composite joint in tower structures
Yingying Zhang,Qiu Yu,Wei Song,Junhao Xu,Yushuai Zhao,Baorui Sun 국제구조공학회 2023 Steel and Composite Structures, An International J Vol.49 No.5
Tower structures have been widely used in communication and transmission engineering. The failure of joints is the leading cause of structure failure, which make it play a crucial role in tower structure engineering. In this study, the aluminum alloy three tube tower structure is taken as the prototype, and the middle joint of the tower was selected as the research object. Three different stainless steel-aluminum alloy composite joints (SACJs), denoted by TA, TB and TC, were designed. Finite element (FE) modeling analysis was used to compare and determine the TC joint as the best solution. Detail requirements of fasteners in the TC stainless steel-aluminum alloy composite joint (TC-SACJ) were designed and verified. In order to systematically and comprehensively study the mechanical properties of TC-SACJ under multi-directional loading conditions, the full-scale experiments and FE simulation models were all performed for mechanical response analysis. The failure modes, loadcarrying capacities, and axial load versus displacement/stain testing curves of all full-scale specimens under tension/compression loading conditions were obtained. The results show that the maximum vertical displacement of aluminum alloy tube is 26.9mm, and the maximum lateral displacement of TC-SACJs is 1.0 mm. In general, the TC-SACJs are in an elastic state under the design load, which meet the design requirements and has a good safety reserve. This work can provide references for the design and engineering application of aluminum alloy tower structures.
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