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Study on Numerical Simulation Method of Aerodynamic Performance of High-speed Train on Bridge Chaoqun Xiang1,a, Wenhua Guo1,b, Jiawen Zhang1,c 1School of Civil Engineering, Central South University, Changsha 410004, P.R.China axiangcq@qq.com, bwhguo@126.com, c57128498@qq.com Key words: dynamic mesh method; wind barriers; aerodynamic performance; high-speed train; Abstract: The dynamic mesh method that could simulate the actual moving of train was used to calculate the aerodynamic coefficients of train on bridge with wind barriers of various heights, and the static pressure distributions around the train body and velocity magnitude distributions were analyzed, the results computed by dynamic mesh method were compared with that computed by traditional static mesh method.
Journal of wind engineering and industrial aerodynamics, 2003, 91: 573-592. ,[4] C.J.Baker.
Journal of wind engineering and industrial aerodynamics, 2010, 98: 88-99. ] and wind tunnel test [[5] H Kozmar, L Procino, A Borsani, et al.
Journal of wind engineering and industrial aerodynamics, 2012, 107-108: 274-284. ].
Journal of wind engineering and industrial aerodynamics, 2008,96:584-610. ].

Introduction As the rapid development of the aerospace, shipbuilding, civil engineering, mechanical manufacturing and other industry over the past two decades, the requirements of the parts lightweight are become higher and higher.
The ESO program flow was optimized and improved. 2D examples have demonstrated that the improved ESO method has better stability and engineering adaptability due to self-healing capabilities in dealing singular model and also due to using the optimization strategy of multiple initial removal rates.
Meanwhile, multiple results provide more available topologies of engineering applications.
Pier optimization example shows that the improved ESO optimization method has a higher practicality and stability in engineering applications.
Using the multi-RR0 optimization strategy provides more available choices for the target structure topology design and better meets the requirements of practical engineering structural design. 3.

Numerical Simulation on Adding Chamfer Angle of Direct Air Cooling Exhausted Duct for Large Thermal Power Generator Chun-qing Wang1,a,Cai-xia Bian2,b 1-2Municipal environmental engineering institute, Jilin Jianzhu University NO.5088, XinCheng Street, Changchun City, Jilin province, China abiancaixia1989@163.com, b843348224@qq.com Keywords:Direct air cooling, Flowing field, Numeral simulation, Chamfer angle.
Model simplification Due to the flow of the steam in the exhaust passage belonging to a complex of high Reynolds number turbulence flow area[3],it need to simplify the flow field.Assuming that the exhausted steam passage and external environment of natural convection heat transfer quantity is very little,corresponding produced fluid volume very little.The steam of the exhausted channel is compressible gas,the properties of the parameter is a function of pressure and temperature.Wet steam is discharged out from the export in practical engineering,and liquid content is more than 8%, generally not more than 10%,and small amount of condensation,vapor phase velocity is high,and liquid film easy to tear,with entrainment entrained into the mainstream,so the effect of the existence of liquid film on the whole can be ignored.
Acknowledgements My deepest gratitue goes first and foremost Shanghai Natural ScienceFoundation,Innovation Program of Shanghai Municipal Education Commission and Shanghai Leading Academic Discipline Project of Shanghai Municipal Education Commission,it provides a chance for us to siscuss rencent progress in the area of civil engineering and transporation.
[4]Lei Shi,Xiong Fan.Building Energy Engineering,October 2007 Section 5 :68 -70.In Chinese
[5]Zhan-zhong Han.FLUENT fluid engineering simulation and application examples.Beijing : Beijing Institute of Technology Press, 2004.

Test Study on Strength Characteristics of Unsaturated Silt Yulin Qian 1,a, Feiyan Wang 1,b and Xiaowei Li1,c 1Yangzhou University College of Civil Science and Engineering Jiangsu Yangzhou 225009 China aqyl@yzu.edu.cn, b421157419@qq.com, c815676832@qq.com Keywords: unsaturated silt, triaxial test, matrix suction, shear strength Abstract.
Introduction The soil shear strength is a necessary parameter of the engineering design and construction [1].
Matrix suction of unsaturated silt makes its strength characteristics and engineering properties become very complex [2].
Engineering Mechanics Supplement (2001), p. 115-118.
Journal of Engineering Geology (2011), 19(6).

Study on Soft Soil Consolidation by Simulate Vacuum Preloading with Computer Tomography Lingtao Mao1,2,a Taiqian Liu2,b Liming Wen2,c Zexun Yuan2,3,d 1 State Key Laboratory of Coal Resources and Safe Mining, Beijing 100083 2 School of mechanics & civil engineering, China University of Mining & Technology, Beijing 100083 3 Urban Construction Faculty, Beijing City University Beijing 100083 amlt@cumtb.edu.cn, bliutaiqian2008@163.com, clxyz_wlm@126.com dyuanzexun@bcu.edu.cn Key words: Soil consolidation, Vacuum Preloading, Micro-structure, Computer tomography Abstract.
Thanks to Liu-Aimin and Zhuge-Aijun in Tianjin Harbour Engineering Research Institute Ltd. provide support for this paper’s field investigation and sampling.
Port Engineering，1991，(4)：17-26 [2] LouYan，LouBin.
Preliminary Study of Tianjin Marine Soft Soil Microstructure and Engineering Properties.
Journal of Geotechnical Engineering，1996，18（4）：57-62

The Impact Analysis of Ground Stability Caused by Exploiting Underground Coal Shu-xian LIU 1, a, Xiao-gang WEI 1,b , Shu-hui LIU2,c, and Li-ping LV3,d 1 College of Civil Engineering and Architecture, LiaoNing Technical University,China 2Fuxin Highway School, LiaoNing, China 3College of Resources and Environment Engineering, LiaoNing Technical University, China alntuliushuxian@163.com, bzzxmwxg@163.com, c lgdliushuxian@tom.com, dllplvxw@163.com, Keywords: Stress Concentration; Randomicity; Numerical Analysis; Coal Excavation Abstract.
References [1] H.Guo-qing, Y.Lun: Mining Engineering Subsidence Study.
Journal of Disaster Prevention and Mitigation Engineering, 23(2)p. 94-99. (2003).
Chinese Journal of Rock Mechanics and Engineering, 23(4)p: 583-587. (2004).

Gorshkov: The energy efficiency in the field of construction: questions of norms and standarts and solutions for the reduction of energy consumption at buildings, Magazine of Civil Engineering, 1 (2010) рр. 9-13
Petrichenko: Nonsteady filtration in a uniform soil mass, Power Technology and Engineering, (2012) pp. 1-3
Bukhartsev: Problem of filtration in a uniform rectangular soil mass is solved by variational principles, Power Technology and Engineering, 46 (3) (2012) pp. 185-189
Petrichenko: Approximation of the depression curve of the inflow to an ideal trench, Power Technology and Engineering, 44 (5) (2011) pp. 374-377
Murgul: Features of energy efficient upgrade of historic buildings (illustrated with the example of Saint-Petersburg), Journal of Applied Engineering Science, 12 (1) (2014) pp 1-10

Study on the influence of linear of fire on Steel Deck Arch Bridge Juan Du1,a, Xianghai Zhou2, b 1Department of Civil Engineering, Southeast university chengxian college，Nanjing 210088，China 2Hubei province transportation hall of engineering quality supervision，Wuhan 430014，China ariqq30@126.com, bxianghaizhou@126.com Keywords: Fires; Steel Arch Bridge; Bearing on type; Fire reflects ; linear Abstract.
Engineering Case Bearing type steel arch bridge is a example.
[6] ASCE Manuals and Reports on Engineering Practice No.78, Structural Fire Protection [S].
Published by ASCE, New York [7] B.R.Kirby&R.Preston.High Temperature Properties of Hot-rolled structural steels for Use in Fire Engineering Design studies[J].

The Vertical and Horizontal Spectra of Near-fault Ground Motions Yin Jiang1, a, Zhou Xian-yan1,b, He Guo-jing1,c 1 College of Civil Engineering and Mechanics, Central South Universityof Forestry and Technology, Changsha, Hunan, 410004, China ayinjiang2001@yahoo.com.cn, b zxy560805@163.com, c cegjhe@hotmail.com Keywords: Near-fault; Response spectra; Vertical ground motion.
In this paper, a suite of 30 near-fault ground motion records are downloaded from strong motion database of Pacific Earthquake Engineering Research Center in U.S., Using the horizontal component and the larger vertical component in each set, the horizontal and vertical elastic acceleration response spectra are established within the periodic range of 0 to 10 sec, and have been compared with each other as regard to their maximum value and spectrum shape.
Response spectra of near-fault ground motions The traditional view of earthquake engineering assumes that the horizontal seismic- action is the dominant factor leading to structural damage, and the vertical seismic action could be neglected to some extent.
So far UBC97 is the unique seismic code amending the design response spectrum according to near-fault effect factor, and represents the development trend in future seismic engineering.
Such phenomenon must be serially considered in engineering design and evaluation especially to structures with short or medium fundamental period.

Strain Measurement in Local Volume by Non-Contact Videoextensometric Technique on Ultra High Strength Steels Stanislava Hlebová1,a, Ľubomír Ambriško2,b and Ladislav Pešek3,c 1Technical University of Liberec, Faculty of Mechanical Engineering, Department of Material Science, Studentská 2, 461 17 Liberec, Czech Republic 2Technical University of Košice, Faculty of Civil Engineering, Institute of Structural Engineering, Vysokoškolská 4, 042 00 Košice, Slovak Republic 3Technical University of Košice, Faculty of Metallurgy, Department of Materials Science, Park Komenského 11, 040 11 Košice, Slovak Republic astanislava.hlebova@gmail.com, blubomir.ambrisko@tuke.sk, cladislav.pesek@tuke.sk Keywords: non-contact strain measurement, videoextensometry, DIC method-Aramis, ultra high strength steel, deformation Abstract.
Sutton et al., International Journal of Impact Engineering 36 (2009) 862-874
Al Ali et al., Procedia Engineering 40 (2012) 8-13.