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The motive reliability design of mechanical structure BAO Ruixin1, 2, a, LI Yongkui1, LI Jia2 and WANG Xingang3 1Engineering college, Shenyang Agricultural University, ShenYang,110161, China 2Liaoning Shihua University, Fushun, 113001 ,China. 3School of Mechanical Engineering ＆{TTP}-250 Automation, Northeastern University, Shenyang, 110004, China arx66829112@163.com Keywords: motive reliability; reliability model; random course; failure rate Abstract.
Here we establish a mechanical structure dynamic reliability math model, from the calculation of the actual parts, we can see this is a more suitable math model in real engineering problems .It has very significant meaning in precisely analyzing and evaluating the reliability of a system, promoting the product quality, guaranteeing the operation security and making reasonable repairing plan.
However, in order to consort with the current reliability design, make the variable S meaningful in the engineering, S is valued as S¢, which is the maximum of sI in n period, Combined with formula (9), formula (13) can be expressed as : (14) Assume, so the above formula changes into (15) we can get s¢ using the formula (15) with I type distribution, (16) We can get the function by taking formula (16) into formula (14): (17) The residual strength model [5] proposed by Schaff is: (18) Here：R(0)——initial strength ；Sp—— the maximum value in fatigue destruction ；n/N——longevity fraction ；c——material index.
Beijing Institute of Technology Press, SAE China, Beijing, 2000 [2] Zhang Y M, Liu Q L. : Journal of Automobile Engineering Vol.216(2002), p.455 [3] LI Tian, LIU Xila: China Civil Eng J Vol. 27(1994), p.47 (in Chinese) [4] Gong Xin-jin,Zhao Guo-fan.

Equivalent Viscous Damping Ratio of Steam Turbine Foundation in Nuclear Power Plants ZHOU Xiangyang1, 2, a 1Postdoctoral programme, Guangdong Electric Power Design Institute, Guangzhou, China; 2School of civil and transportation engineering, South China University of Technology, Guangzhou, China; azxyleon@163.com Keywords: equivalent viscous damping ratio; composite structure; complex damping; vibration mode; nuclear power plants; Abstract.
Due to linear differential equation of motion when using viscous damping coefficient, viscous damping is widely used in engineering practice.
Wang: Earthquake Engineering and Engineering Vibration (Ch).Vol. 22 (2002), p. 1-5

Yap, Correlation of DSR results and FTIR’s carbonyl and sulfoxide indexes: Effect of aging temperature on asphalt rheology, Journal of Materials in Civil Engineering, 31(7), (2019), 04019115
Sauzéat, Time-temperature superposition principle for bituminous mixtures, European Journal of Environmental and Civil Engineering, 13(9), (2009), 1095-1107
Industrial & engineering chemistry research, 33(11), (1994), 2801-2809
Journal of Materials in Civil Engineering, 27(4), (2015) 04014157
International Journal of Pavement Engineering, 17(7), (2016), 565-577

Linear Programming Application in Construction Enterprises Jiang Ling School of Economics and Management, Wuhan University, Wuhan, 430072, China whu_jiangling@163.com Keywords: Linear programming, MATLAB software, Optimal plan of steel cutting Abstract: Constructional engineering is becoming the key industry in the national economy.
According to the definition in Encyclopedia of China, operations research (O.R.) is “a technological science to study the economic, civil administration and national defense departments’ rational allocation of human, material and financial resources under the environmental constraint by using mathematical methods.
The loss of the steel bars is as follows: Total consumption of steel bars= (36+73+20+20+40)*12=2268 meters Attrition rate = (34.6/2268)100%=1.5% The attrition rate is lower than the actual attrition rate in construction sites, and also lower than 3%, the attrition rate of cast-in-site reinforced concrete structure in the engineering norms.

Structure Mechanics Analysis with Different Construction Schemes in Large-span Space Grid Structure Zhenxing Li 1, a （1 College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024） a lf1314_2007@163.com Keywords: Large-span space truss structure.
In this paper, the following practical engineering is adopted to discuss characteristics of different construction schemes in large-span space grid structure and provide a reference for what construction scheme should be selected in the installation of similar space grid structures.

Seismic behaviour and retrofitting of timber frame walls POLETTI Elisa1,a and VASCONCELOS Graça1,b 1ISISE, Department of Civil Engineering, University of Minho, Campus de Azurém, Guimarães, Portugal aelisapoletti@civil.uminho.pt, bgraca@civil.uminho.pt Keywords: shear wall, cyclic test, strengthening, steel plates, NSM technique Abstract.

Research of Fatigue Limit and Stress Concentration on Structural Steel with Double-Notches Wang Sheng-wu1, a, Sun Shu-juan2, b, Wen Ai-ling3, c, Wang Wei-da4, d, and Nishida Sin-ichi5, e 1 School of Civil and Safety Engineering, Dalian Jiao tong University, Dalian 116028, China 2 Instute of Information Engineering, Dalian Jiao tong University, Dalian 116052, China 3 School of Mechanical Engineering, Dalian Jiao tong University, Dalian 116028, China 4 Graduate school of Dalian Jiao tong University, Dalian 116028, China 5 Faculty of Mechanical Science & Engineering, Saga University, Saga 740-8502, Japan a wangsw@djtu.edu.cn, bsunshujuan@sina.com, cwenal@djtu.edu.cn, dwangweida@foxmail.com, e nishida@me.saga-u.ac.jp Keywords: double-notch; fatigue limit; stress concentration Abstract.
The results are significant for the design of engineering design of the multi-notched parts, and the study of fatigue strength.
[2] Wang S.W., Nishida S., Hattri N., et al: Japan Society Mechanical Engineering International Journal Ser.
[3] Lei H.G, Pei Y., Liu L.J: Engineering Mechanics, Vol.25 Sup.

Niobium-microalloyed high strength low alloy (HSLA) steels are widely used in civil construction, automobile and line pipe applications.
Other examples for typical applications of niobium metallurgy find in engineering grades as forging and spring steels [4].
Bleck, Niobium in Engineering Steels for Automotive Applications, steel research int. 77 (2006) No. 9-10, pp. 698-703

Civil benefit (U22) 6 huge sum-5; many profit-4; some profit-3; profit and loss balance-2; large loss-1.
Contribution of upgrading civil industries (U33) 11 huge contributions-5; relatively big contributions-4; some contributions-3; no change-2; industry behind heavily-1.
Study on the Evaluation Criteria and Method for the Conversion of Civil Technology to Military Use, Transactions of Beijing Institute of Technology, 2006 (Suppl.), p94-98
Compositive Assessment Models of Venture Enterprises, Investment Value Based on Gray Theory, Journal of Wuhan University of Technology (Transportation Science and Engineering ), Vol 29, p495-498

A Holistic Approach to a Sustainable Steel Building Cristina Campian1a*, Nicolae Chira1b, Maria Pop1c 1Technical University of Cluj-Napoca, Civil Engineering faculty, 25 Baritiu Street, acristina.campian@dst.utcluj.ro (corresponding author), bn_chira11@yahoo.com, cmaria.pop@dst.utcluj.ro Keywords: steel houses, sustainable buildings, life cycle, environment impact Abstract: Impacts of production, operation and use of a building on the environment and society cannot be ignored in design any more.
Steel, as constructional material, plays an important role as a component for buildings and engineered structures, with a wide range of applications.
In accordance with the architectural proposals, the structural engineer who choose the thickness of the insulation layers and heat sealed the envelope has a high percentage contribution to emission of pollutants in the operational phase.
The actors with the right of decision on this issue are the installation design engineers and the investment beneficiary.
The studies are preliminary engineering studies, based on calculation methods complying with the applied standards.