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Comparison of Initial and Improved Hertz-Damp Model for Structural Pounding Simulation Yongqiang Yang 1, a and Lili Xie 1, 2 1Institute of Engineering Mechanics, China Earthquake Administration, Harbin, China 2School of Civil Engineering, Harbin Institute of Technology, Harbin, China ayangiem@hotmail.com Key words: Hertz-Damp Model; Structural Pounding; Contact Stiffness; Restitution Coefficient Abstract.
DesRoches: Earthquake Engineering and Structural Dynamics vol.35(2006), p.811 [2] K.H.
Jankowski: Earthquake Engineering and Structural Dynamics vol.34:6(2005), p.595 [6] W.
Eleventh World Conference of Earthquake Engineering.
Monnier: Journal of Structural Engineering vol.117:2(1991), p.354

Introduction Drilling is one of the most wide spread processing operations applied in mechanical engineering and in construction [1-3].
Robello Samuel, Drilling Engineering, PennWell Corp., Tulsa, 2007
Dornfeld, Automated drill modelling for drilling process simulation, Journal of Computing and Information Science in Engineering 7 (2006) 276-282
Florian, Comparison of material constitutive models used in FEA of low volume roads, International Journal of Civil, Structural, Construction and Architectural Engineering 7 (2013) 413-417
Yakubovich, The special features of the deformation for the bearing building constructions with composite reinforcement, Procedia Engineering 48 (2012) 346–351.

Damping Influence of System Vibration Minyuan Huang School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410004, Hunan, China Hmy555@163.com Keywords: System, Vibration, Damping Factor, Low Frequency Effects, Project Fitting.
But this condition hardly exists in the engineering.
In practical engineering, the resonance production needs a process, but this phenomenon doesn’t happen instantly.
Influence of low frequency .In engineering, the natural frequency has the difference between the undamped system and the damped system.
In the engineering of damping treatment, a reasonable vibration damping value is the success key to anti-vibration.

Numerical Simulation of Factors on Zonal Disintegration in Surrounding Rocks of Deep Roadways Jianguo Ning1, a, Xuesheng Liu 2,b , Haitao LI 3,c 1,2 College of Resource and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China 3 School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, China anjglxh@126.com, blxs@126.com, ccatchyou@163.com Keywords: Deep Roadway, Zonal Disintegration, Numerical Simulation, Influencing Factors Abstract.
[4] Qihu Qian, Shuchen Li: submitted to Chinese Journal of rock mechanics and engineering(2008)
[5] Xiaoping Zhou, Qihu Qian: submitted to Chinese Journal of rock mechanics and engineering (2007)
[6] Shucai Li, Hanpeng Wang and Qihu Qian: submitted to Chinese Journal of rock mechanics and engineering (2008)
[7] Yongnian He, Houquan Zhang: submitted to Chinese Journal of rock mechanics and engineering (2008).

Toropov3, g 1Division of Materials and Production Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan 2Y-tec Corporation, 3-74, Soda, Kaitacho, Akigun, Hiroshima, 736-0003, Japan 3Schools of Civil and Mechanical Engineering, University of Leeds, Leeds, West Yorkshire, LS2 9JT, UK ahamahiro@hiroshima-u.ac.jp, bb091772@hiroshima-u.ac.jp, crhino@hiroshima-u.ac.jp, dfyoshida@hiroshima-u.ac.jp, emanabe-h@ytec-gr.co.jp, fKondo-h@ytec-gr.co.jp, gV.V.Toropov@leeds.ac.uk Keywords: Die design, Topology optimization, High strength steel sheet, Press forming, Stiffness improvement Abstract.
Maximum displacements during stamping between thus optimized die and the one designed by the experienced engineer were compared.
For the beginning, experienced engineer designed a die shape obeying his company’s standard.
Fig. 5 Structure of the upper die designed using engineering knowledge (standard tool) (weight reduction: 53.6%).
In this study, OptiStruct (Altair Engineering Inc.) was employed as topology optimization solver.

Effects of Shear Deformation of Struts in Hexagonal Lattices on their Effective In-Plane Material Properties Pana Suttakul1,a*, Thongchai Fongsamootr1,b, Duy Vo2,c, and Pruettha Nanakorn2,d 1Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Thailand 2School of Civil Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Thailand apana.s@cmu.ac.th, bthongchai.f@cmu.ac.th, cd6122300053@g.siit.tu.ac.th, dnanakorn@siit.tu.ac.th Keywords: 2D lattice, Hexagonal unit cell, Effective in-plane property, Shear deformation, Homogenization method Abstract.
Two-dimensional lattices are widely used in many engineering applications.
These lattices have been widely used in many engineering applications, especially in aerospace and biomaterials [1-5].
Acknowledgements The first author wishes to acknowledge the Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University.
Scholarships from the ASEAN University Network/Southeast Asia Engineering Education Development Network (AUN/SEED-Net) and Sirindhorn International Institute of Technology for the third author are greatly appreciated.

Numerical Simulation Methods and Parameters of Geo-grid Rein-forced Retain Fly Ash Wall Wei Shi a，Xiaowen Chen b，Jiming Liu c School of Civil Engineering, Qingdao Technological University, Qingdao, China asusan.sw@163.com, bwen-00123456789@163.com, cliujm63@163.com Key words: Geogrid, Geogrid reinforced fly ash retaining wall, Constitutive parameters, numerical simulation method Abstract.
However, the interface characteristics of reinforced technology, engineering application of theory is relatively lagging behind.
Reinforced Retaining Wall engineering materials of fly ash should be used to connect the interface with the soil stiffness, elastic modulus of the geogrid
Design Japan status of reinforced soil.The Conference Information of College of Environmental Science and Engineering, ocean University of China.2003.In Chinese
Elastic solid mechanics.China railway publishine house.1990 [5] Wenxi Huang.Soil Engineering Properties.Beijing: China WaterPower Press.1993

Research on a New Type of Hydraulic Oil Tank and a Working States Monitoring System for the Hydraulic System ChenBaoJianga, LiuYaob Department of Mechanic-electronic and Automobile Engineering, Beijing Institute of Civil Engineering and Architecture, Xicheng, Beijing,100044, P.R.
Research on plate-fins and radiators [J], Chinese journal of mechanic engineering , (7): 203-206
[2] Zhang Tiezhu, New type hydraulic tank [J], Chinese journal of mechanic engineering, 2000, (11): 12-16
[3] Wan Fujun, The research of over-heat hydraulic system [J], Chinese journal of mechanic engineering , 1998, (2): 93-97
[6] Chen Baojiang, Energy-saving, Fast response and high accuracy electro-hydraulic, control system, Chinese journal of mechanic engineering, 2005,(5): 191-195.

Coupled Numerical Simulation Research on Dewatering and Land Subsidence in Deep Foundation Pit DONG Dong Zhang1, 2 1 Institute of Engineering Safety and Disaster Prevention, Dept. of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 2 Shanghai Geological Mineral Engineering Investigation Co.
On the one hand, soil excavation of foundation tip engineering and the increasing of the engineering load result in changes of soil internal subsurface water regime and hydraulics characteristics; on the other hand, foundation pit dewatering measures change the supply, runoff and discharge conditions of underground water, which affects the stability of soil[2-5].
Ground water of engineering site can be divided into phreatic water and confined water according to site characteristics.
Chinese Journal of Geotechnical Engineering. 2008 [2] Dong-dong Zhang.

Performance Deterioration Behavior of Existing Reinforced Concrete Bridges AN Xinzheng1, 2, a, YI Cheng 2,b and DU Ruixue3,c 1 College of Civil Engineering, Hebei University of Engineering, Handan, P.
China 3 College of Architecture, Hebei University of Engineering, Handan, P.
Kennedy: Journal of Structural Engineering Vol. 116 (1990), p. 1160
Chen: Journal of Traffic and Transportation Engineering, Vol. 2 (2002), p. 21
Yang: Central South Highway Engineering, Vol. 29 (2004), p. 38