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Zhang J.,Zhejiang University of Technology | Wu Y.,Harbin Institute of Technology | Wu D.,Harbin Institute of Technology | Zhou G.,Zhejiang Southeast Space Frame Co.
Proceedings of the 12th International Symposium on Structural Engineering, ISSE 2012 | Year: 2012

A number of methods for assessing wind-induced vibration of structures are available ranging from simplified procedure using quasi-static methods to the detailed procedure using statistical methods. The appropriate procedure should be selected in accordance with wind sensitivity of structures. The object of this paper is to provide an answer to the problem of how to distinguish between those structures for which can be treated by simple, possibly quasi-static, or more complex method for wind-resistant design. Based on the characteristic of wind-induced response according to different wind-sensitivity, a criterion is proposed to classify structures for wind-resistant design. Three categories are divided according to the characteristic of wind-indused response with different wind-sensitivity: insensitive structure, moderate sensitivity structure and sensitive structure. The boundary definitions between different categories were discussed emphasizely by means of the relationship between the extreme displacement response and the limited displacement response, together with the contribution of background response and resonant response to the fluctuating response. It lays a solid foundation for the further study of wind-induced response analysis with suitable methods for each category. The classification system is verified through the analysis of typical large-span roofs. The results indicate that the classification system for wind-resistant design based on the wind-sensitivity helps to clarify mechanism of wind induced response, propose nichetargeting wind-resistant analysis strategies, and establish the simplified-method for wind-resistant design with the same level of reliability. Source


Zhang J.,Guangzhou University | Zhou G.,Zhejiang Southeast Space Frame Co. | Ma X.,Guangzhou University | Min S.,Guangzhou University
Applied Mechanics and Materials | Year: 2011

Based on the installation process of mega complex steel frame structure in Guangdong Science Center, the engineering features and difficulties are introduced. Then the installation schemes and technologies are described in detail, including installation stages division, installation sequences, installation technology of steel column, main or secondary truss and bow truss. The result indicates that the effect of the installation technology is perfect. The application of this installation technology effectively ensures construction progress, quality and safety. © (2011) Trans Tech Publications, Switzerland. Source


Zhang J.,Zhejiang University of Technology | Zhao D.,Zhejiang University of Technology | Zhou G.,Zhejiang Southeast Space Frame Co.
2011 International Conference on Electric Technology and Civil Engineering, ICETCE 2011 - Proceedings | Year: 2011

In order to determine the optimized parameters and offer logical advice for the design of truss and string structure, systematic parametric analysis for the mechanical behavior of the structure have been performed using ANSYS finite element software. Based on the discussion of effect with different factors, including ratio of string height to structural span, ratio of arch height to structural span, pre-tension value of the string, size of the truss, the optimized parameters for the design of truss and string structure are obtained. The results indicate that: (1) The ratio of string height to structural span (expressed as f1 /L), and ratio of arch height to structural span (expressed as f2 /L), are the most important factors influencing the mechanical behavior of the structure. The appropriate range of these two parameters is 0.050.1 for f1 /L and 0.050.125 for f2 /L respectively. (2) The pre-tension value of the string depends on the structural span, and the appropriate range of this parameter is 1200kN1400kN for the truss and string structure whose span is 110m. Moreover, the pre-tension value of the string would increase 200KN when the structural span increases 10m. (3) There is very little effect of the size of the truss for the mechanical behavior of the structure. © 2011 IEEE. Source


Zhang J.,Zhejiang University of Technology | Wang J.,Zhejiang University of Technology | Zhou G.,Zhejiang Southeast Space Frame Co.
2011 International Conference on Multimedia Technology, ICMT 2011 | Year: 2011

The primary purpose of this study is to provide simple formulas for estimating the design wind loads denoted as gust effect factor for large-span domed roofs considering their dynamic response under wind excitation. In this paper, systematic parameter analysis for the gust effect factor of Kiewitt6-6 type domed roof structures have been performed with random simulation method in time domain, including geometric parameters, structural parameters and aerodynamic parameters. Moreover, an empirical formula for the gust effect factor is provided as a function of these parameters based on a statistical analysis, which can be conveniently used in wind-resistant design of these structures. The results indicate that the geometric parameters are the most important factor influencing the wind-induced response of domed roof structures, and the gust effect factor is well-proportioned, which is 3.0∼3.2 as a reference for the wind-resistant design. © 2011 IEEE. Source


Chen M.,Arup | Zhang J.,Zhejiang University of Technology | Zhou G.,Zhejiang Southeast Space Frame Co.
Advanced Materials Research | Year: 2011

Dynamic wind pressures acting on structures are complicated functions of both time and space. The proper orthogonal decomposition technique (POD) is a method of detecting a new coordinate system which can most efficiently represent such random wind pressure fields to identify hidden deterministic structures. In this paper, the POD technique is applied to dynamic wind pressures on spatial structures in order to investigate the properties of these pressures and enable to understand the phenomena better. The results indicate that the POD technique can greatly reduce the amount of data that needs to be stored to re-examine the random wind pressure, which can be reconstructed by only a few dominant modes. It requires 5 modes with an accumulative proportion of 70∼80% approximately. Moreover, the dominant modes can describe the spatial distributions of the fluctuating wind load effectively. © (2011) Trans Tech Publications, Switzerland. Source

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