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Wang F.,Wuhan University of Science and Technology | Wang L.,Central South Architectural Design Institute Co.
Applied Mechanics and Materials | Year: 2014

At present, since the environmental pollution caused by construction activities accounts for about one-third of all the pollution, to develop green building technology has important significance for sustainable development in China. In this paper, according to climatic characteristics in hot-summer and cold-winter areas in China, six aspects of the green technology, such as land saving, energy saving, water saving, material saving, improving the quality of the indoor environment and intelligent operation, are comprehensively employed in the design of office building. © (2014) Trans Tech Publications, Switzerland.


Zhao B.,Tongji University | Gao H.,Central South Architectural Design Institute Co.
Advanced Materials Research | Year: 2012

According to the shake table test results of a high-rising building with large local space, the dynamic characteristics of such structure are complex and the torsional mode becomes the first mode, while the torsional responses under earthquake excitation, especially of the floor just above the large local space, are very remarkable. Special measures are required for such structural system for maintaining its seismic safety. In this research, the bidirectional Tuned Mass Damper (TMD) is employed for reducing the torsional vibration of the high-rising building with large local space. The optimization of the TMD parameters, such as natural frequency, damping ratios and mass ratio, is performed. The time history analysis results indicate that the proposed bidirectional TMD is very effective in torsional vibration control. © (2012) Trans Tech Publications, Switzerland.


Chen Y.-K.,Central South Architectural Design Institute Co. | Li L.,Huazhong University of Science and Technology | Cao H.-J.,Huazhong University of Science and Technology
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2013

Based on the computational fluid dynamics (CFD) software, the method of a two-dimensional cylinder surrounded by unsteady wind flow was used to simulate aeolian vibration of bundle conductors. Firstly, the analysis of unsteady flow around fixed double circular cylinders was performed. The model and the analysis method were verified comparing with classical literatures. Then, based on the moving mesh technology and the programming, the vibration behavior of double conductors under conditions of different supports, spacings and tilting angles was studied. The vertical amplitudes of the sub-conductors versus the reduced velocity were obtained. This study was important for investigation on aeolian vibration of bundle conductors.


Chen B.,Wuhan University of Technology | Zheng J.,Central South Architectural Design Institute Co.
Advanced Science Letters | Year: 2012

Base isolation systems can be augmented with supplemental control devices to limit base drift of the structure. The seismic mitigation of building structure with intelligent hybrid control system is carried out in this study. The mechanical model of magnetorheological (MR) damper is presented by involving the effects of brace stiffness of damper. The equation of motion of a frame structure with stiffness eccentricity incorporated with intelligent hybrid control system disturbed by seismic excitations is established by considering the effects of both rubber isolator and MR dampers. A clipped-optimal strategy based on fuzzy control principle is proposed for MR dampers. A building structure is taken as the example to examine the feasibility and reliability of the proposed intelligent control approach. The observations demonstrate that the intelligent hybrid control system can substantially suppress seismic responses of the building with optimal parameters. © 2012 American Scientific Publishers All rights reserved.


Li L.,Huazhong University of Science and Technology | Chen Y.-K.,Central South Architectural Design Institute Co. | Xia Z.-C.,China Railway Siyuan Survey and Design Group Co. | Cao H.-J.,Huazhong University of Science and Technology
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2011

The galloping of iced conductors is a serious threat to the safety of transmission lines. A two-nodebar element having three translational and one torsional degree-of-freedom at each node was employed to model the conductor. Combining with the method of the bundle conductor equivalence to a single conductor, the finite element model of multi-span transmission line for galloping analysis was established. In addition, the aerodynamic coefficient of iced conductor under different wind attack angle was obtained by using computational fluid dynamics method. On the basis of the finite element model and aerodynamic coefficient curve, the Runge-Kutta method was applied to carried out nonlinear numerical simulation of iced conductor galloping and the FORTRAN program was compiled. The galloping of the long-span transmission line crossing Hanjiang River was analyzed. The results indicate that the presented method and program are reliable and efficient. Meanwhile, the impact of the wind velocity and initial attack angle on galloping were investigated with the program. They canprovide references for the further study of galloping.

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