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Engineering Situation Rencungou Viaduct, Yingyugou Viaduct and Liaoyugou Viaduct is three important bridges on the Lian-Huo highway, located in the territory of Gongyi city in Henan province, number of bridge center pile respectively is K136+293, K132+253 and K131+533.
In the engineering design requirements, the most important natural vibration frequency of All the natural vibration frequency is low order natural vibration frequency.
Advance of research on vibration - based structural health monitoring in civil engineering [J].

A New Method for Studying the Damage in Concrete Subjected Single Face Salt Freezing Cycle Weihong Li1,a*, Yihan Wang1,b , Yiwang Bao2,c and Zongming Yang1,d 1 Civil and Archit.
Through this way, ones can provide the reference basis for choosing the concrete coating and a best thickness of concrete cover in engineering practice.
Bridge engineering design and application of concrete durability Low Temperature Architecture Technology. 3 (2002) 8-11 [3] WANG Yuan, CHEN Cui-hong.
Bu, et al, Evaluating elastic modulus and strength of hard coatings by relative method, Materials Science and Engineering A.458（2007）268–274 [6] BO Xiao-xue.

Searching of Critical Slip Surface of Slope Based on Bionics Algorithm Wei Gao1,2,a, Luyu Zhang3,b 1School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China 2 State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Sichuan Chengdu 610059, China 3The 9th General Team of Airport Construction of China, Sichuan Chengdu 611430, China awgaowh@163.com, bzly1974@gmail.com Keywords: Slope; Critical Slip Surface; Searching; Immunized Continuous Ant Colony Algorithm.
J. of Geotechnical Engineering Vol. 122 (1996), p. 517
Chinese Journal of Rock Mechanics and Engineering Vol. 24 (2005), p. 2237.

Mechanical Characterisation Of Material Properties Using Instrumented Indentation Experiments Charles Moy 1,2,a, Massimiliano Bocciarelli 3, Simon Ringer1 and Gianluca Ranzi1,2 1 Australian Key Centre for Microscopy and Microanalysis, The University of Sydney, Sydney, NSW, 2006, Australia 2 School of Civil Engineering, The University of Sydney, Sydney, NSW, 2006, Australia 3 Department of Structural Engineering, Politecnico di Milano, 20133 Milano, Italy a c.moy@usyd.edu.au Keywords: indentation tests, mechanical properties, simulation, finite element modelling Abstract The proposed work makes use of an inverse analysis approach to identify the mechanical properties of a material sample which can be described by means of the elastic modulus, yield stress and strain-hardening parameter.
[5] Bocciarelli, M. and Bolzon, G. (2007) Indentation and imprint mapping for the identification of constitutive parameters of thin layers on substrate: Perfectly bonded interfaces, Materials Science and Engineering: A, 448(1-2), 303-314

The CFRP Material's Mechanical Performance And Application Zhao Jun1,a , Liu Quansheng1, 2,b , Shi Kai1,c 1 State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 2 The Insitute Of Civil Engineering, Shandong University of Science and Technology, China, 266000 a abc_438@163.com; b liuqs@whrsm.ac.cn; c shikaiwp@yahoo.cn Keywords: CFRP, reinforced concrete, ultimatic bending, deflection; Abstract: This paper analyzes the normal section capacity of the reinforced concrete paste with CFRP.
The results show that CFRP in the bottom of the reinforced beams can significantly enhance the flexural capacity, therefore, it can be applied directly into engineering practice. 1 Theoretical methods 1.1 Formula When the members of the rectangular cross-section of the tension surface with CFRP are reinforced, the flexural capacity should be calculated as followings; When the height of concrete compression zone cfbxh ,and less than 0bh , the ultimate moment can be expressed as following: )( )() 2 ( 0 ' 0 '' 0 hhAEahAf x hbxfM cfcfcf sy c    (1) the height of concrete compression zone x and tensile strain cf with CFRP should be expressed as the following formula

Improvement on Hardness of 6061 Al Alloy Using an Electroless Ni-P Coating Wenfeng Qin 1, a, Jiang Long 1,b and Feng Liu 1,c 1 Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan, 618307, China a qwfgrh@126.com, b ljzpj@163.com, c Lhjlf999@sohu.com Keywords: electroless; 6061 Al alloy; Ni-P; pH; hardness.
Introduction 6061 aluminum alloy constitutes a very important engineering material widely employed in the aircraft and aerospace industry for the manufacturing of different parts and components due to its excellent mechanical strength, low specific weight, good formability and relatively low cost [1].
Electroless Ni-P coatings are often considered engineering coatings owing to their exceptionally high hardness, remarkable wear and corrosion resistance properties [12-14].

Xin 2 1 Key Lab of Silicate Materials Engineering of Ministry of Education Wuhan University of Technology, Wuhan, China, 430070 2 Hubei Provincial Quality Control and Test Center for Building Engineering Keywords: Cement concrete, Microstructure, Interfacial transition zone (ITZ).
Introduction In China, concrete has been extensively used in civil and construction engineering.

., COMAC, Shanghai, P.R.China, 200444 3 College of Mechanical and Power Engineering, Harbin University of Science and Technology,Harbin Heilongjiang Province, P.R.China, 150080 aswg2008@sina.cn, b5681604@qq.com, chjw@hit.edu.cn Key words: inspection reliability, sample size, risk, producer, consumer Abstract:As we all known, for a certain product, inspection reliability for the product can be considered and calculated by a famous reliability index as POD (Probability of Detection).
In general, for civil aircraft manufacturing field α is 0.05 and β is 0.10.
References [1] J.J.Xiong, R.A.Shenoi, A durability model incorporating safe life methodology and damage tolerance approach to assess first inspection and maintenance period for structures, Reliability Engineering and System Safety, 94 (2009), 1251-1258 [2] Kara A.Latorella, Prasad V.Prabhu, A review of human error in aviation maintenance and inspection, International Journal of Industrial Ergonomics, 26 (2000), 133-161 [3] O.Cronvall, K.Simola, I.Mannisto, J.Gunnars, L.Alverlend, P.Dillstrom, L.Gandossi, A study on the effect of flaw detection probalbility assumptions on risk reduction achieved by non-destructive inspection, Reliability Engineering and System Safety, 105 (2012), 90-96 [4] Mehmet Simsir, Alpay Ankara, Comparison of two non-destructive inspection techniques on the basis of sensitivity and reliability, Materials and Design, 28 (2007), 1433-1439 [5] S.G.Hellevik, I.Langen, J.D.

So thickness 12 mm is suitable in engineering.
Engineering Mechanics. 22(2005)67-72
Guangdong Architecture Civil Engineering, 17(2010)16-18.

Use of Digital Image Correlation to Track Strain Evolution in Compressed Masonry Piers ANTOŠ Jakub1,a, NEŽERKA Václav1,b and TESÁREK Pavel1,c 1Czzech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Praha 6, Czech Republic ajakub.antos@fsv.cvut.cz, bvaclav.nezerka@fsv.cvut.cz, ctesarek@fsv.cvut.cz Keywords: Digital image correlation, compression test, masonry piers, damage localization.
Ranson, Digital Imaging Techniques in Experimental Stress Analysis, Optical Engineering 21 (1982) 427-431
Debruyne, Assessment of measuring errors in DIC using deformation fields generated by plastic FEA, Optics and Lasers in Engineering 47 (2009) 747-753