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138 results on '"Zhao, Yangang"'

22. Time-dependent probability assessment for chloride induced corrosion of RC structures using the third-moment method

Author

Zhang, Xiaogang, Wang, Jiao, Zhao, Yangang, Tang, Luping, and Xing, Feng

Subjects
Steel -- Corrosion, Reinforced concrete -- Analysis -- Mechanical properties, Learning models (Stochastic processes) -- Analysis, Business, Construction and materials industries
Abstract

ABSTRACT This paper presents the time-dependent probability of chloride-induced corrosion of reinforced concrete (RC) structures in marine environments. By using the third-moment (TM) method with improved analytical solutions, the stochastic [...]

Published
2015
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39. Lateral load pattern in pushover analysis

Author

Tetsuro Ono, Sun Jingjiang, Wang Wei, and Zhao Yangang

Subjects
Engineering, business.industry, Mechanical Engineering, Shear force, Building and Construction, Structural engineering, Geotechnical Engineering and Engineering Geology, Nonlinear system, Shear (geology), Structural load, Time history, Shear wall, business, Inverted triangle, Civil and Structural Engineering
Abstract

The seismic capacity curves of three types of buildings including frame, frame-shear wall and shear wall obtained by pushover analysis under different lateral load patterns are compared with those from nonlinear time history analysis. Based on the numerical results obtained a two-phase load pattern; an inverted triangle (first mode) load pattern until the base shear force reachesβ times its maximum value, Vmax, followed by a (x/H)α form, hereβ and α being some coefficients depending on the type of the structures considered, is proposed in the paper, which can provide excellent approximation of the seismic capacity curve for low-to-mid-rise shear type buildings. Furthermore, it is shown both the two-phase load pattern proposed and the invariant uniform pattern can be used for low-to-mid-rise shear-bending type and low-rise bending type of buildings. No suitable load patterns have been found for high-rise buildings.

Published
2003

43. Design and implementation DDS based on FPGA

Author

Lv Ying, Wang Huiqin, Jia Kejun, and Zhao Yangang

Subjects
Switching time, Frequency synthesizer, Digital down converter, Direct digital synthesizer, business.industry, Computer science, Bandwidth (signal processing), Lookup table, Electronic engineering, Field-programmable gate array, business, Hardware_REGISTER-TRANSFER-LEVELIMPLEMENTATION, Computer hardware
Abstract

Design DDS(Direct Digital Synthesizers, DDS) based on FPGA combine the advantage of the output relatively bandwidth and frequency switching time. The design and implementation of digital frequency synthesizer by FPGA are introduced in this article, moreover, the simulated wave are presented.

Published
2010

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