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Liu L.,Chongqing University | Li Y.,Chongqing University | Luo J.,Sichuan Provincial Architectural Design Institute | Xiang L.,Chongqing University
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2013

The structure on the slope with uneven height grounding column ends is one of the most familiar structure types. Slope deformation results in different foundation deformation where it grounds in uneven height. The difference of foundation deformation leads to the existence internal force in structure. Simplified analysis model of building structure on the slope with uneven height grounding column ends is built up in this paper. Internal force of simplified model in the case of slope deformation is analyzed, as well as the change rule of internal force when beam span and column height vary. Structure example is designed and internal force distribution characteristic of the example is analyzed. The research shows that even if small slope deformation occurs, it will result in large internal force in building structure on the slope. Structure internal force caused by slope deformation mainly locates in the second floor above uneven height grounding and the floors below that. And the internal force of beams and columns in the first floor above uneven height grounding is the largest. The influence of slope deformation on structure can be improved via the design method and construction measures. Conclusions can be used to guide the design of building structure on the slope in the case of slope deformation, and to provide foundation for subsequent research. Source


Yang L.-L.,Chongqing University | Lu J.,Chongqing University | Tang H.-Q.,Chongqing University | Gan L.-L.,Sichuan Provincial Architectural Design Institute
Chongqing Daxue Xuebao/Journal of Chongqing University | Year: 2011

As the equipment for condensing heat transfer, heat transfer capacity of cooling tower has a direct effect on its outlet water temperature which can influence the EER of chiller. The outlet water temperature of the cooling tower can be lowered through taking measures according to the study on its influencing factors and the EER of the system can be improved. Taking a crossflow cooling tower in an engineering practice as a subject, a mathematical model is built based on the measured data and the analysis on factors of outlet water temperature is conducted both theoretically and experimentally. Source


Lu J.,Chongqing University | Wang L.,Chongqing University | Wang X.,Sichuan Provincial Architectural Design Institute | Li C.-D.,Chongqing University
Advanced Materials Research | Year: 2012

A systematic and detailed introduction of IFIX-based SCADA system in public buildings is given in this paper. SCADA system consisting of on-site computer control system, central operation station and intelligent metering system, makes the energy-management system complete. It reflects the energy consumption status reasonably by energy monitoring, combined metering as well as apportion in terms of acquirement. By means of equipments' energy consumption analysis, the running mode of equipments is adjusted to reduce energy consumption in buildings. The advanced function of SCADA system, moving forward, should be self-adaptive energy management with the advent of intelligent building. © (2012) Trans Tech Publications, Switzerland. Source


Yuan X.,Zhejiang University | Zhou L.,Zhejiang University | Zhou L.,Sichuan Provincial Architectural Design Institute | Li A.,Zhejiang University
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2013

The structural buckling was actually a mechanism motion process. In the analysis of structural buckling, the effect of geometry topology on the stability of structural system should be paid enough attentions, and mechanism displacement should also be taken into account. In this study, the essence of force-displacement curve in the equilibrium path was first clarified. With the mechanism displacement mode considered comprehensively and structures and mechanisms unified, a new method named as "Geometrically Nonlinear Force Method by Solving Kinematic Path" (GNFM-KP) was then proposed to trace the whole buckling process of structures by introducing continuous disturbance. The variation tendency of elastic stiffness, geometry stiffness and tangent stiffness of structures and their mutual relationships in the buckling process were also investigated. The validity and accuracy of the present method to trace the whole buckling paths of structures were illustrated eventually by analyzing a 24-bar star-shape space truss. Source


Zhang X.-C.,Nanjing Southeast University | Xu Z.-D.,Nanjing Southeast University | Ran C.-S.,Sichuan Provincial Architectural Design Institute | Zhu J.-T.,Nanjing Southeast University
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2013

Magneto-rheological damper (MRD) is an excellent semi-active control device. The location matrix of MRD in the frame structure incorporated with MRD was derived. Then a member model was selected as the mathematical model of the structure. An elastic-plastic dynamic response analysis of the structure incorporated with MRD was programmed by using MATLAB. The displacement and acceleration responses of the structure with and without MRD, as well as the distribution of plastic hinges of the member, were calculated and compared. Comparison results show that the displacement and the acceleration responses of each floor of the structure with MRD were reduced significantly, in which the vibration mitigation effect on displacement is superior to that on acceleration. At the same time, the number of plastic hinges is also reduced. Source

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