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Optimization of Lubricant Return in Refrigeration Systems Petr Vlček1,a* and Marian Formánek1,b 1 Brno University of Technology, Institute of Building Services, Faculty of Civil Engineering, Veveří 331/95; 602 00 Brno, Czech Republic a vlcek.p@fce.vutbr.cz, b formanek.m@fce.vutbr.cz Keywords: Refrigeration Equipment, Oil, Refrigerant Abstract.
Currently, in all branches of civil engineering is required the effort to maximize energy savings.
Smutný, Refrigeration Engineering II (Chladicí technika II) Praha: Union CHKT, 2000.

Modelling of Closed Steel Supports for Underground and Mining Works Petr JANAS1,a, Karel JANAS1,b, Lenka KOUBOVA1,c and Martin KREJSA1,d 1Department of Structural Mechanics, Faculty of Civil Engineering, VSB - Technical University of Ostrava, Ludvika Podeste 1875/17, 708 33 Ostrava-Poruba, Czech Republic apetr.janas@vsb.cz, bKarel.Janas@seznam.cz, clenka.koubova@vsb.cz, dmartin.krejsa@vsb.cz Keywords: closed support, steel profile, yielding support, unyielding support, load carrying capacity, passive forces, active loading, interactions with the surrounding rock massif, force method, Winkler model.
Key Engineering Materials, 2016, Vol. 713, pp. 119-122.
Transactions of the VŠB - Technical University of Ostrava, Civil Engineering Series, Vol. 11, Issue 1 (2011) 1–6, ISSN: 1804-4824, DOI: 10.2478/v10160-011-0012-0

Center for Rock Instability and Seismicity Research, Northeastern University, Shenyang, 110004, China 3 School of Civil and Hydrauicl Engineering, Dalian University of Technology, Dalian, 116024, China a Tianhui-Ma@163.com,b catang@mechsoft.cn Keywords: Numerical simulation; RFPA; Fracture pattern; Fracture saturation.
Introduction Fracture in layered materials have been intensely investigated in the past decades for it is important to civil enginneers, mechanical engineers and geoscientists[1].
ICCS, 2004 [8] D.Broek: Elementary engineering mechanics (Kluwer Academic Publisher, USA 1986) [9] Z.

Convergence Study on Application of the Over-deterministic Method for Determination of Near-tip Fields in a Cracked Plate Loaded in Mixed-mode Lucie Šestáková1,a, Václav Veselý1,b 1Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Brno, Czech Republic asestakova.l@fce.vutbr.cz, bvesely.v1@fce.vutbr.cz Keywords: Crack, stress field, displacement field, Williams expansion, higher-order terms, over-deterministic method, quasi-brittle fracture.
Conference on Civil, Structural and Environmental Engineering Computing, Civil-Comp Press, Stirlingshire, UK, 2009
Xiao, Size effect in concrete beams, Engineering Fracture Mechanics 70 (2003) 979-993
Fatigue & Fracture of Engineering Materials & Structures 00 (2010) 1-18
Fischer (Eds.), Proceedings of 18th International Conference Engineering Mechanics, ITAM AS CR, Prague, 2012, pp. 1301-1307

The design of lightning protection in automatic charging station of the aviation airport Baocheng wang1, a, Guyong Han r2,b, Song Lu3, Jun Zhou4 1Xuzhou Airforce1, a, College Xuzhou，China 2Xuzhou Airforce College Xuzhou，China aEmail:xzkjxywangbaocheng@163.com Keywords: aviation airport, automatic charging station, the technology of lightning protection the engineering design of charging station lightning protection Abstract.
I．The Analysis of the Threat about the Automatic Charging Station in the Aviation Airport A civil aviation airport automatic charging station always be made of a floor of reinforced concrete frame, external brick wall is built by bricks or stones, and the room is 5 high, the building area is for 158 , the ceiling and ground reserved line layout channel, through the set of partition door the automatic battery charging station is divided into independent night shift room, charging and discharging room , control room and storage room, as figure 1 shown.
Figure 4 The relation curves of shielding net grid’s size and shielding coefficient Conclusion Any engineering of lightning protection is complex system engineering.
Because this engineering is very complex and has high demand, the construction must be careful.
Electronic engineering, 2007: 27 to 29 [2] HangJun Li, Zheng Lin, ZiHua Li.

Multi-level fuzzy comprehensive evaluation of bridge carbon intensity based on life-cycle carbon emission model Xiaoyan Sun 1,a, Weiwei Dong 1,b, Hailong Wang 1,c*, Jie Wang 2,d 1 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China 2 Department of Civil and Environmental Engineering, Stanford University, California, CA 94305-4020 aselina@zju.edu.cn, bujsdongweiwei@126.com, chlwang@zju.edu.cn djiewang@stanford.edu Keywords: Carbon footprint; Life cycle assessment; Bridge; Fuzzy comprehensive evaluation; Carbon intensity Abstract.
The carbon intensity index is proposed considering the feature of bridge engineering and economic cost.

Quiel2,e 1Department of Civil Engineering, IIT Kanpur, Kanpur 208016, India 2Department of Civil Engineering, Lehigh University, U.S.A.
Introduction Real-time hybrid simulation (RTHS) is a reliable and affordable alternative to more expensive shake table testing for simulation of seismic effects in civil infrastructure systems with loading rate dependent behaviour.
Rossin College of Engineering and Applied Science (RCEAS) fellowship along with the Gibson fellowship awarded to the first author through the Department of Civil and Environmental Engineering, Lehigh University.
Ph.D. dissertation, Dept. of Civil and Env.
PEER Report No 2011/05, Pacific Earthquake Engineering Research Center, University of California, Berkeley, Berkeley, California 2011

Recycling of Polyethylene Terephthalate Wastes in Production of Hollow Sandcrete Blocks for Sustainable Construction O.M Olofinnade1,a* I.E.E Davies1,b and I.W Egwuonwu1,c 1Department of Civil Engineering, Covenant University, PMB 1023, Ota, Nigeria a*rotimi.olofinnade@covenantuniversity.edu.ng, bdavies.iyinoluwa@lmu.edu.ng, cifeoma.egwuonwu@stu.cu.edu.ng Keywords: Waste plastic, Polyethylene terephthalate (PET), Compressive strength, Density, Water absorption, Eco-friendly production Abstract.
The sand was purchased locally within Ota, Ogun state and delivered to the Civil Engineering Laboratory.
Opara and C.U Anya, mechanical properties of palm kernel shell concrete in comparison with periwinkle shell concrete Malaysian Journal of Civil Engineering 29(2017) 1-14 [31] R.K.
Jackson, Civil Engineering Materials 5th ed.
International Journal of Engineering Research and Applications, 3(2017) 713–721 [40] S.O Odeyemi, O.O Otunola, A.O Adeyemi, W.O Oyeniyan, and M.Y Olawuyi, Compressive strength of manual and machine compacted sandcrete hollow blocks produced from brands of Nigerian cement American Journal of Civil Eng. 3(2015) 2-3

The Non-stationary Characteristic Study of Multidimensional Ground Motion by HHT Method: A Case Study from the Chi-Chi Earthquake Huiguo Chen 1,2, a, Yingmin Li 1,b and Shaoqing Shi 2,c 1 College of Civil engineering, Chongqing University，Chongqing 400045, China 2 Department of Architecture & Civil engineering, Logistical Engineering University， Chongqing 401311, China achenhg_mail@163.com, bliyingmin@cqu.edu.cn, c shishaoqing@sohu.com Keywords: Non-stationary, Multidimensional ground motion, Instantaneous frequency.
Earthquake Engineering and Engineering Vibration, Vol.23(3) (2003),p. 25-29，In Chinese
Earthquake Engineering and Engineering Vibration, Vol.26(1) (2006),p. 22-29, In Chinese
China Civil Engineering Journal, Vol.39(2) (2006),p.66-72, In Chinese
Earthquake Engineering and Engineering Vibration, Vol.24(2) (2003),p.1-11, In Chinese

The Proposed Road Architectural Theory System Reviewed architectural history,these building initially was Maocao Peng,and later developed into brick houses.In ancient China, building houses and activities engaged in other civil engineering were generally called as "construction", "build".
A highway not only provides places for cars and other vehicles to travel,but also for related personnel to work and rest.Also it is public building facilities, and it meets these basic need of engineering and aesthetics as other public buildings.
About pursuit and requirements of road aesthetics,we carried out the implementation of GBM engineering since the 1980s in China.We promoted the building process of the road(G), standard(B),landscaping(M) in road maintenance.GBM project merged road engineering, traffic engineering,architecture school, architectural art,road aesthetics,landscape architecture,management and traffic psychology.On the engineering side,it implemented well-designed, construction, maintenance and standardized management,and highlighted some traits including the road linear beauty,constructional beauty,road cleaning,traffic flow,etc.On facilities along the line,it emphasized facilities’s security including these signs, markings, safety protection and other facilities.On road planting,it highlighted local conditions and kinds of green ways according to circumstances and roads.And combined artificial landscape with natural landscape,it gave people senses of beauty and pleasure,the maximum possible to integrated people
It is public building facilities.At the same time it should meet the basic requirements of engineering and aesthetics together with other public buildings, etc.
It is a cross discipline of architecture and highway engineering.Of course, it includes both technical and artistic aspects.