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Structural safety alarming based on signal energy by using wavelet packet transform Zengguo Jiang1, a, Bo Chen1,b 1School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, China 2Key Laboratory of Roadway Bridge and Structural Engineering, Wuhan University of Technology, Wuhan, China azenguoj168@163.com, bcbsteven@163.com Keywords: Wavelet packet transform, slope vector, curvature vector, signal energy.
Introduction Civil engineering structures often exposed in the open air and they are inevitably subjected to environmental effects and external excitations, which may cause the accumulating damages in the structural components [1].
Frontiers of Architecture and Civil Engineering in China, 2010, 4(3): p. 354-369
Amand: Wavelet-based approach for structural damage detection, Journal of Engineering Mechanics, ASCE, 2000, 126(7), p. 677-683
Farrar: Holder exponent analysis for discontinuity detection, Journal of Structural Engineering and Mechanics ASCE, 2004, 17 (3-4), p.409-428

An optimization analysis of prestressed space grid structures based on system reliability ChunYu Zhang 1, 2,a, ZhenQing Wang 1,b and Mu Qiao 1,c 1 College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, 150001, China 2 College of Architecture and Civil Engineering, Heilongjiang Institute of Science and Technology, Harbin, 150001, China a hljkjxyzcy@163.com, b wangzhenqing@hrbeu.edu.cn, cqmqmqm23@163.com Keywords: prestressed space grid structures; optimization analysis; system reliability; improved genetic algorithm Abstract.
As the structure is small, consider the symmetry, six kinds of bar cross-section are used in chords and web members, express as variable 61~AA respectively. 16 specifications of steel usually used in engineering practice can be selected from.
A numerical example shows that by using the significant failure modes of the branch-bound method, the reliability of the PNET method and the optimization theory of advanced genetic algorithms, the algorithm proposed in this paper is suitable for the optimization of prestressed space grid structures and it has a certain value engineering application.
References [1] Sun Fangning Han Zhigang: Industrial Construction.2007,37 .701-703 [2] DENG Hua: Spatial Structures.2000,9.26-31 [3] ZHOU Jian sheng CAI Yin lin: Structure & Environment Engineering [4] Thoft-Chtistensen,P.and Murotsu,Y: Application of Structural Systems Reliability, Springer-Verlag,1986 [5] Holland J H: Adaptation in &atural Artificial Systems.
Department of Civil Engineering University of Michigan, No8402282,1983．

Method of Damage evaluation of Long-Span Arch Bridge Subjected to Blast Loading Li He1, a, Yongjiu Qian 2,b 1School of Civil Engineering, Yaitai University, Yantai, Shandong, 264005, China 2School of Civil Engineering, Southwest Jiaotong University, Chengdu, 610031, China aytuheli@126.com, byjqian@sina.com Keywords: Long-span Arch Bridge, Blast Loading, Damage Evaluation, Fuzzy Theory Abstract.
Introduction In the modern conventional war, enemy emphasize destroying the opposite bridge engineers, especially significant bridge projects.
For the (ancillary engineering), the main elements: conical slope; drainage facilities and other.
Chengdu: School of Civil Engineering of Southwest Jiaotong University (2006).
International Journal of Impact Engineering, Vol25 (2001), p.869 [4] Gomez J.T., Shukla A., Sharma A.

Yegorov, Development and verification of multiblock computational technologies for solution of unsteady problems of high building aerodynamics in the framework of URANS approach, Magazine of Civil Engineering, №1(36) (2013) 103-109
Zinoviev, Keh-Chin Chang, Jiun-Jih Miau, Problems and methods of numerical and experimental investigation of high rise constructions’ aerodynamics in the coastal region "sea-land", Magazine of Civil Engineering. 37 2 (2013) 54-61
Petrichenko, Approximation of the depression curve of the inflow to an ideal trench, Power Technology and Engineering, №.44, 2011
Petrichenko, Condition of mechanical-energy balance of an integral flow with a variable rate, Power Technology and Engineering, 2001
Kitain Determination of welding spark parameters for cyclone efficiency calculation, Magazine of Civil Engineering. 23 5 (2011) 5-9

Analysis on Anchorage Length of Compression Anchor Bingxiong Tu1,a , Jinqing Jia1,b , Hongsheng Yuan2,c , Haitao Wang1,d 1School of Civil Engineering, Dalian University of Technology, Dalian, 116024, China 2Institute of Architecture Civil Engineering; Langfang Teachers College; Langfang 065000, China atubingxiong@163.com, bkeyknown@163.net, cyhs221@163.com, dwht_dalian@163.com Key words: compression anchor, effective anchorage length, critical anchorage length Abstract: This paper proposes a new model to calculate anchorage length for the compression anchor.
Introduction Although compression anchor is common practice in the support for deep excavation, reinforcement for the slope and other engineering.
The anchorage length of compression still deserve to be analyzed to provide good guidance for the civil engineer.
In: New Development in Dam Engineering Wieland London, edited by Taylor and Francis Group, 2004:951-959
Performance of Tension and Compression Anchors in Weathered Soil, ASCE Journal of Geotechnical and Geoenvironmental Engineering. 129(12)(2003), p. 1138-1150

Use of Algerian Natural Mineral Deposit as Supplementary Cementitious Materials Karima ARROUDJ1,a*, Saida DORBANI1,b, Mohamed Nadjib OUDJIT1,c and Arezki TAGNIT-HAMOU2,d 1Building in Environment Laboratory, Faculty of Civil Engineering, University of Sciences and Technology Houari Boumediene (USTHB), BP 32 EL Alia, Bba Ezzouar, Algiers, Algeria 2Cementitious Materials Laboratory, Department of Civil Engineering, Faculty of Engineering, 2500 Boul.
Much of the current research on concrete engineering has been focused on including siliceous additions as supplementary cementitious materials (SCMs).
) [12] N.Kaid, M.Cyr, H.Khelafi, Characterization of an Algerian natural pozzolan for its use in eco-efficient cement, International Journal of Civil Engineering, A, Transaction A: Civil Engineering, 13, N°. 4 (2015) 444-454
Tagnit-Hamou, Reactivity of fine quartz in presence of silica fume and slag, Engineering, 03 N° 06 (2011) 569-576

From Functional Areas towards Metropolitan Structure: Public Space in Sustainable Development Context SOUREK Michal1, a * 1Czech Technical University in Prague, Faculty of Civil Engineering, Department of Architecture, CZ 166 29 Prague 6, Czech Republic asourek@msgroup.cz Keywords: Public space, communication, social-cultural and material values, city – polis, built environment, brownfield, deteriorated locality, urban fallow, modern era built heritage, sustainable development, sustainable life, architecture, civil engineering, urban planning Abstract.
Naturally, the civil engineering works both of the public space and the adjoining ones - their architectures and experiences, provided "by themselves" - are accessed and interpreted by the urban public space, too.
As soon as exposed to the public space, even a construction work, originally conceived as a purely engineering one without conscious social-cultural ambitions, resonates social-cultural values spontaneously.

Mateus1,g* 1Institute for Sustainability and Innovation in Structural Engineering (ISISE), Department of Civil Engineering, University of Minho, 4800-058 Guimarães, Portugal *Corresponding author; e-mail: araphamalheiro@gmail.com, badriana.ansolin@hotmail.com, cchrisguarnier@gmail.com, djepfernandes@me.com, eltcosentino@hotmail.com, fsms@civil.uminho.pt, gricardomateus@civil.uminho.pt Keywords: Reed; Physical properties; Thermal performance; Ecological; Low cost Abstract.
The reed board was tested in a calibrated guarded hotbox designed and built at the Department of Civil Engineering of the University of Minho (Teixeira et al., 2020), based on ASTM specifications C1363 (ASTM, 2014).
Laboratório Nacional de Engenharia Civil, Portugal
Laboratório Nacional de Engenharia Civil, Portugal
Laboratório Nacional de Engenharia Civil, Portugal

Influence of concrete strength grade and age on three tensile strengths Xi xi He Ping Fang School of Civil and Transportation Engineering Beijing University of Civil Engineering and Architecture Beijing, China hexixi@bucea.edu.cn fang0914@126.com Keywords: direct tensile strength; splitting tensile strength; flexural strength Abstract.
By contrast, the lack of direct tensile test data does little help to obtain tensile strength conversion formulas with extensively engineering significance.
[3] China civil engineering society.
[4] China civil engineering society.
[5] China civil engineering society.

Aeroengine Oil Fault Diagnosis based on D-S Evidential Theory Qu hongchun1, 2, a, Ding xiebin2, b and Wang taiyong1 1 School of Mechanical Engineering, Tianjin University, Tianjin,300070, P.R.China 2 College of Aeronautical Engineering, Civil Aviation University of China,Tianjin,300300, P.R.China aqhc@eyou.com, bweylby@126.com Keywords: Aerospace Propulsion theory and Engineering; wear debris; Dempster-Shafer evidence combination; fault diagnosis Abstract.
From the engineering point of view, engine wear condition can be divided into three assessment levels: normal, warning, abnormal.
Acknowledgements This work was financially supported by Civil Aviation University of China research fund 05yk08m and Central College Basic Scientific Research Fund ZXH2010D019.
References [1] Wu Zhenduo, Zuo Hongfu, Sun Youchao: Aviation Engineering and Maintenance Vol.4 (2000), p.25-26
[7] Fu Jianping,Zhang Peilin,Li Guozhang: Journal of Ordnance Engineering College Vol.17 (2005) No.1, p.14-16.