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The test results show that the SMA wires is better than the other two SMA bars and plates, the SMA wires, bars and plates had better to be training before civil engineering application .
Active, passive and semi-active control dampers have been made with shape memory alloy (SMA)with advantages such as excellent fatigue resistance, high corrosion resistance, high restore deformation and stable performance[1-5], thus it causes extensive concern in civil engineering.
But now SMA application in civil engineering has been not so wide [6].
Journal of Structural Engineering, 2007,p.862-870.
Britain currently has about 1.6 billion tons of coal gangue and coal gangue hill more than 800 seats, they use most of the gangue material as a common filling for dams, roads and other civil engineers.
Their technical level affects the overall engineering quality.
References [1]Zhou Jianyu:Research of application of coal gangue mixture in road engineering.
(Hebei University of Engineering,Handan2013
Among the current problems that rock or civil engineers face, perhaps there is none as challenging as the characterization of fluid flow though fracturing rocks, especially when they are highly stressed.
In mining and civil engineering projects, the re-distribution of the stress field during the excavation of tunnels and underground chambers lead to the formation of new fractures.
Engineering practice show when the rock mass was excavated that structural plane was dissected, and frequently appearance opening large deformation, barring was destroyed, even whole opening became instability.
Journal of Coal Science & Engineering. 2007, 13(4): 484-488
Corresponding author: Longsheng Bao Mailing Address: School of Civil Engineering,Shenyang Jianzhu University,Shenyang, Liaoning,110168, China Telephones: +86-024-24691803(office), +86-13516094255 (Mobile) Fax: +86-024-24691800 E-mail: baolongsheng710605@163.com, yd0806@126.com Keywords: Continuous girder bridge,Parameter error , sensitivity,Midas/Civil,construction monitoring Abstract: During the construction control in order to better control the elevation, the need for sensitivity analysis of the design parameters, the sensitivity analysis of design parameter adjustment principle, so as to adjust the measured deflection and deflection calculation error of judgment, and for the cross section should be the main design parameters of stress sensitivity.
CONCLUSIONS The author uses the method of sensitivity analysis to find the effect of the main design parameters of bridge construction monitoring elevation, and the design parameters are modified, the deflection error caused by the error between measured and calculated values.Through the analysis of sensitivity to the section stress,gravity and prestressing force is the main design parameters, the bending moment of inertia and the elastic modulus of concrete as the main design parameters.Indicates that the application to engineering practice, using sensitivity analysis method is simple and easy to adjust the characteristics of design parameter error, high accuracy.The deflection of cantilever construction error adjustment,ensure the smooth construction linear beam bridge, makes the final bridge can effectively smooth closure.
The Midas/Civil analysis model Table 1 Effect of Elastic on the Deflection Adjustment range /% Modulus of elasticity /Mpa The node deflection /mm Effects of proportion /% -10 3.26E+04 17 -11.7% -5 3.47E+04 16 -6.6% 0 3.63E+04 15 0 5 3.80E+04 14 6.6% 10 3.99E+04 12 11.7% Table 2.
The Midas/Civil analysis model References and Notes [1].
The presented collection of the articles describes research results and engineering solutions in materials science, materials processing, civil construction, machines and equipment design, thermal engineering, power engineering, and mechatronics.
The publication will be helpful to many engineers from the industrial sector.
Increasing interest about composite materials and their use in the field of civil engineering offers possibility for development of new innovative materials, which will be used as constructive elements.
Use of the fiber reinforced polymers as bearing materials in the field of civil engineering is the major leader in scientific research in the recent years.
This paper presents the experimental testing of composite materials, as a part of a more complex research project dealing with developing of FRP sandwich panel with potential applications in civil engineering.
Karbhari: Journal of Structural Engineering ASCE, Vol.66, No. 8 (1996), p. 44 [5] K.
company,the results was announced by Dacheng company on the San Francisco earthquake Engineers Conference in the 1983[4].
[3] TAN Ping,ZHOU Fu-lin.Research and Application of Seismic Isolation System for Civil Engineering Structures[J].Construction technology, 2008,37(10):5-8
[6] QiAi State-of-the-art of strory isolation system [J].Earthquake Engineering and Engineering Vibration,2004,(6):114-120 (in Chinese) [7] Xue Yan-tao.Status and application of base-isloation technique of buildings[J].Building structure,2011,41(11):82-87
[8] ZHOU Fu-lin,TAN Ping,XIAN Qiao-ling,HUANG Xiang-yun,YANG Zheng.Research and Application of Seismic Isolation System for Building Structures[J].Journal of Architecture and Civil Engineering,2006,23(2)1-8.
Nowadays, the natural plant fibres (hemp, jute, sisal), concrete recyclate, fly ash, steel slag are used for the purposes of the construction in the civil engineering.
Conclusions This work presents the possibilities of using alternative materials (hemp fibres, MgO-cement, recycled concrete, coal fly ash and steel slag) in civil engineering.
Teo: Utilisation of Recycled Aggregate as Coarse Aggregate in Concrete in UNIMASE E-Journal of Civil Engineering, Vol. 1 (2009)
Yehia: Utilization of Recycled Coarse Aggregate in Concrete Mixes in Journal of Civil Engineering and Architecture, Vol. 5 (2011), p. 562-566
Magazine of Civil Engineering. 2011.
Resheniye odnomernykh zadach metodom konechnykh elementov [Numerical methods in civil engineering.
Magazine of Civil Engineering. 2009.
Magazine of Civil Engineering. 2010.
Liquid state reference is often used in lab to study steel corrosion by triple electrode system, but it is very difficultly used in steel bar corrosion monitoring in civil engineering.
Steel bar corrosion monitoring is a very important part of structure health monitoring and full-life design in civil engineering [1-5].
By this way the service life which is very important for corrosion monitoring in civil engineering of ASSRE will be prolonged.
Table 1 Dissolvability of AgCl changes with excessive Cl- Excessive Cl- (mol/L) 0 3.9E-3 9.2E-3 3.6E-2 8.8E-2 0.35 0.50 Dissolvability of AgCl(mol/L) 1.3E-5 7.2E-7 9.1E-7 1.9E-6 3.6E-6 1.7E-5 2.8E-5 Conclusions A novel ASSRE has been prepared, four kinds of components and three-layer structure ensure the service life of ASSRE for corrosion monitoring in civil engineering.