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RISS 인기검색어
- 검색키워드
- 저자 : Yuyin Zhang (검색결과 4 건)
- 무료
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Yuyin Zhang,Likai Liang 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.2
For the contradictory issues of the transmission rate and flexibility in the current temperature system, this paper puts forward a novel fast rate, high flexibility, and visualization monitor system, and presents its architecture principle design and software-hardware of the whole system. Controller area network (CAN) bus acting as multi-host and high-speed field bus is selected to design the distributed communication system, ZigBee technology based on CC2530 and embedded system centered with ARM Cortex-M3 microprocessor STM32F103VET6 are selected to design the flexible data acquisition network, and embedded Ethernet is select to design remote and distributed monitoring. Based on the distributed system, visual monitoring software is developed; it can achieve data display, data query, and real-time monitoring and give an early alarming of accidents caused by temperature. After a number of experiments show that the system is stable, temperature flexible, highly real-time, and the temperature measurement accuracy can be up to 99.37%.
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Yuyin Wang,Chao Gong,Sumei Zhang,Haishan Guo 한국강구조학회 2010 International Journal of Steel Structures Vol.10 No.1
Heavy-duty cast steel universal hinged supports are gaining increasing usage in modern large-span structures, offering extremely large individual load carrying capacity and universal rotation ability which is preferable to release temperature effects and to improve force conditions of lower structures. This paper presents a full-scale experimental study and elastic-plastic finite element (FE) analysis on the performance of an innovative heavy-duty cast steel support. The support is composed of three main components, i.e. an upper one, a lower one and an intermediate rotation pad. External loads are designed to be passed and transferred through the contact interaction of the three casting parts. The support studied in this paper is expected to possess a higher capacity than existing supports while having the ability of universal rotation under heavy loads. Three full-scale static experiments corresponding to three typical load cases (i.e. tension-shear load case, compression-shear load case, and sheartension load case, respectively) have been carried out employing a multifunctional loading device. A three-dimensional FE model was developed using the commercial software ANSYS, considering the contact behavior between the support components and accounting for both material and geometrical nonlinearities. The model was validated against the experimental results reported in this paper. The performance of this support was evaluated in accordance with a Chinese national code ‘Technical specification for application of connections of structural steel casting (CECS 235:2008)’. This study concluded that this type of support performs well and that it could be used for realistic applications.
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In-Plane Stability of Concrete-Filled Steel Tubular Parabolic Truss Arches
Changyong Liu,Qing Hu,Yuyin Wang,Sumei Zhang 한국강구조학회 2018 International Journal of Steel Structures Vol.18 No.4
For determining the in-plane buckling resistance of a concrete-fi lled steel tubular (CFST) arch, the current technical code GB50923-2013 specifi es the use of an equivalent beam-column method which ignores the eff ect of rise-to-span ratio. This may induce a gap between the calculated result and actual stability capacity. In this study, a FE model is used to predict the buckling behavior of CFST truss arches subjected to uniformly distributed loads. The infl uence of rise-to-span ratio on the capacity of truss arches is investigated, and it is found that the stability capacity reduces as rise-to-span ratio declines. Besides, the calculations of equivalent slenderness ratio for diff erent truss sections are made to consider the eff ect of shear deformation. Moreover, based on FE results, a new design equation is proposed to predict the in-plane strength of CFST parabolic truss arches under uniformly distributed loads.
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Qing Hu,Changyong Liu,Changchun Yuan,Yuyin Wang,Sumei Zhang 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.6
This paper deals with experimental investigations into in-plane stability of fi xed concrete-fi lled steel tubular (CFST) parabolic arches. Three CFST arches with the same span but diff erent rise-to-span ratios were tested under fi ve-point symmetrical concentrated loads over the full span. All applied loads were controlled in synchronization. The test results show that the test arches buckled in an antisymmetric failure mode and the section positions with the maximum deformation were slightly diff erent for three test arches. It is found that the bearing capacity of CFST arches decreased signifi cantly with the decline of rise-to-span ratios, and the outer steel tube provided signifi cant confi nement eff ects on the core concrete after the load reaches 80% of the load-carrying capacity. Moreover, comparisons between the test and fi nite element results indicate that the existing beam-element modeling method can predict the in-plane stability performance of CFST arches very well.
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