Search results

Damage Identification for Beam Structure Based on Correlation Dimension Mao Jiang1, a, Ling Zhou1, b, Yingtao Li1, c, Haiqing Zhou1, d, Jun Shao1, e 1Department of Civil Engineering, Logistical Engineering University, Chongqing, 401311, China amg_9959@sina.com, bzhouling830@163.com, cfantasy25@sina.com, dzhouhaiqing@163.com, eshaojun@163.com Keywords: vibration response, correlation dimension, damage Identification Abstract.
Introduction The fractal dimension is an important parameter to quantify the degree of chaotic attractors[1], which is widely used in planning of nonlinear system behavior, currently some scholars use the fractal dimension as features for the fault diagnosis of large rotating mechanism [2], but the research and application in the field of civil engineering damage identification are rarely reported.
Vol. 17(2007), p.203 [2] W.J.Wang, J.Chen and Z.T.Wu: Journal of Vibration Engineering.

Modeling and Numerical Simulation of Dehumidifier Using LiCl Solution As the Liquid Desiccant Niu Run-ping School of Environment and energy engineering Beijing university of civil engineering and architecture Beijing, China E-mail: niurunping@bucea.edu.cn Keywords: liquid desiccant; heat and mass transfer; mathematical model Abstract.
Acknowledgment The research described in this paper was supported by Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality(PHR201007127) and doctoral startup foundation of Beijing University of Civil Engineering and Architecture.
References [1] W.Y.Saman, S.Alizadeh, Modelling and performance analysis of across-flow type plate heat exchanger for dehumidification/cooling, Solar Energy, 2000, (7): 63~70 [2] Chengchao F., Ketao S., Analysis and modeling of solar liquid desiccant air conditioning system, Taiyangneng Xuebao/Acta Energiae Sinica, 1997, 18(2), 128~133 [3] Ahmed C S K, Gandhidasan P, Al-Farayedhi A A, Simulation of a hybrid liquid desiccant based air-conditioning system, Applied Thermal Engineering, 1997, 17(2)：125~134 [4] Factor H M, Grossman G., A packed bed dehumidifier/regenerator for solar air conditioning with liquid desiccants, Solar Energy, 1980, 24(6)：541~550 [5] Ren Chenqin, Jiang Yi, Zhang Yianpin, Simplified analysis of coupled heat and mass transfer processes in packed bed liquid desiccant-air contact system, Solar Energy, 2006, (80): 121~131 [6] Yang Qiangsheng,Pu Baorong, Advanced Heat Transfer Shanghai: Shanghai Jiaotong University Press, 2004.117~130 [7] Tao Wenquan, Numerical Heat

Experimental investigation of damage characteristics in steel honeycomb sandwich beams Jie Lu1, a, Guang-ping Zoub , Bao-jun Liuc Centre for Mechanics Testing, College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, 150001, China alujie@hrbeu.edu.cn, bgpzou@hotmail.com, clockelord@live.cn Keywords: Acoustic emission, steel honeycomb sandwich beams, damage characteristics, nondestructive detection evaluation.
Introduction Due to advantages of light weight, design flexibility, high stiffness and strength, etc, honeycomb sandwich structures are attractive structural components and are therefore widely used in aviation, space, and civil engineering.
Therefore AE technique is widely used in various engineering applications [3-5].

STUDY OF A NEW TYPE SMA DAMPER Jieyjing Sui a, ChenmingXu b and Wenfeng Liu c Civil Engineering College, Qingdao Technological University, China,266033 asuijieying@sina.com, b 278787234@qq.com, c lwfqdlg@263.net Key words: mechanical property, SMA damper, optimal design, time history analysis Abstract.
Introduction Shape memory alloy (referred to as SMA) in the field of civil engineering is still in the initial stage of research and development.
The kinds of dampers in the form of simple, convenient process, which will help promote the use of the engineering building.
Conclusions Propose a new type of SMA damper, the damper allows structural members in tension, compression and torsion cases, the memory alloy wire is always in tension to avoid buckling of the memory alloy wire; and simple in form, which will help promote the use of engineering .

Study On Joint Deflection of Existing Joint Plain Concrete Pavement Upon Adoption of Hot Mixture Asphalt Overlay Jingsong Shan 1,aand Zhongyin Guo2 1School of Transportation Engineering, Tongji University, Shanghai of China, Postal code 201804 Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation (Shandong University of Science and Technology), Qingdao of China, Postal code 266510 2School of Transportation Engineering, Tongji University, Shanghai of China, Postal code 201804 acyhsjs@163.com Keywords: Joint plain concrete pavement, Asphalt overlay, Joint deflection, Spring element, Shear stress, Deflection criterion Abstract.
Sun: China Civil Engineering Journal, Vol. 34, (2001) p. 45 [4] X.

., Ltd, Chongqing, China 2School of civil engineering, Chongqing three gorges university, Chongqing China a592297885@qq.com,bhbw8456@163.com, chzp7279@163.com, dztq1975@163.com Keywords: Tunnel Mechanics, Jointed rock mass, Numerical analysis, Finite element method.
Wu analyzed slope stability in discontinuous rock mass using finite element method in [7], and it is much less common in tunnel engineering.
International Conference on Civil Engineering, Architecture and Building Materials 2011, Vols. 243-249 (2011) pp 2948-2951
Methods of Geological Engineering in Discontinuous Rocks.

District energy development: Optimal selection of CCHP system scheme Zong Yi Shao1, a, Hong Lian Wang2,b 1Beijing Institute of Civil Engineering and Architecture 2 Beijing Institute of Civil Engineering and Architecture ashaozongyi@126.com, bwhl871114@126.com Keywords: district heating; energy development; CCHP system; optimization research Abstract：According to the energy strategy of China, CCHP system in district heating as the main research object, on a project’s three schemes with the multi-objective optimization method to establish the function evaluation model, quantification and calculate the evaluation index, compare the distance of the scheme from ideal point, finally selecting the optimization scheme.
Example of engineering application An industrial area selects one of regional energy schemes---CCHP system, using the method of multi-objectives optimization to choose the optimal scheme.
Xu.wenfa,, 2011 CCHP Technology Seminar,2011.4.12[in chinese]; [3] Long weiding, Important stage of building energy efficiency: community energy planning, HEATING VENTILATING & AIR CONDITIONING, 2008.38(3) [in chinese]; [4] Wang dengyun, Xu.wenfa, Low carbon city construction and building energy planning, 2010 City Development and Planning Competition essays[in chinese]; [5] An qingsong, Based on gas turbine CCHP system optimization and simulation, Tianjin University, Degree thesis[in chinese]; [6] Tang huanwen, Qin xuezhi, Practical methods of optimization, Dalian University of Techonology,2004.1[in chinese]; [7] Li yangchun, Optimization and selection of air-conditioning heat and cold sources based on grey relation analysis, Journal of Engineering Design,Vol.12.NO.1,Feb 2005[in chinese]; [8] Guo yonghui, Tan yingying, Zhang guoqiang, Based on the multi-objective decision making of air-conditioning heat and cold

Introduction Historic bridges provide valuable information about our cultural heritage, including architectural uniqueness, aesthetic expression, innovations in engineering, and evolution of the transportation system. [1] Masonry arch bridges have been used for at least 4000 years and Iran was one of the pioneers in building such structures as the first masonry arch bridges have appeared first in Mesopotamia, Iran. [2] Debates on priorities in designing bridges are still controversial.
Summery Masonry arch bridges have been the yields of civil, architectural and hydraulic engineering throughout the history.
This research doesn't aim to continue the historic controversy between civil engineers and architects but rather it is going to prove these two have always worked together to bring most possible stability and efficiency to historic buildings and represent such masterpieces to the world of art and science.
Farshad, History of engineering in Iran, Tehran, Iran: Balkh Publication, 1997, pp.243

Rajaraman3 1Associate Professor, Department of Civil Engg., Parisutham Institute of Technology and Science , Thanjavur , Tamilnadu , India.
nimmijegan@gmail.com 2Professor , Department of Civil Engg., Oxford Engineering College, Trichy , Tamilnadu , India.
g_dhanalakashmi2003@yahoo.co.in 3Former Director / Structural Engineering Research Center , Chennai , Tamilnadu , India.
FLOW THROUGH POROUS MEDIA Porous media can be used for modeling a wide variety of Engineering applications.
This system can be widely used for the benefit of system in all the branch of Engineering.

Taking the pile caps of a Passenger Dedicated Railway as an engineering example, the current paper applies three-dimensional finite element software MIDAS/Civil to simulate its unstable temperature field and calculate the temperatures of certain internal and surface representative nodes.
Projects A pile cap in a Passenger Dedicated Railway is used in the current paper as an engineering example.
Finite element analysis for the pile cap Establishment of model .Using three-dimensional finite element software MIDAS/Civil, through massive concrete pile cap on the actual situation as well as a variety of different boundary conditions, we make a simulation analysis of three-dimensional temperature field in the heat of hydration.
In order to take all possible problems into account, nine temperature measuring points, including engineering points, are arranged in the model.
Given that the pile cap’s initial temperature is 5℃, the pouring temperature in the model is 20℃, which is consistent with the real engineering situation.