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Fatigue Damage Accumulation of Welded Bridge Member during Crack Growth Propagation with Initial Crack Taiquan ZHOU 1, a and Tommy Hung Tin CHAN 2, b 1 Department of Civil Engineering, Southern Yangtze University, Wuxi, China, 214122 2 Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China a zhoutaiquan@sytu.edu.cn, bcetommy@polyu.edu.hk Keywords: Fatigue damage; Crack growth; Fatigue life; Initial crack; Welded bridge members.
Smith: Engineering Fracture Mechanics Vol. 63, (1999), P. 523 [5] T.Q.
Raju: Engineering Fracture Mechanics, Vol. 15, (1981), P.185 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 a0/c0= 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 ××××103 a/c= Fig. 3.

Technological processes in natural stone processing with recommendations of processing tools evaluation Jarosław Rajczyk1,a*, Mariusz Kosiń2,b* 1Czestochowa University of Technology Faculty of Civil Engineering, Poland 1Czestochowa University of Technology Faculty of Civil Engineering, Poland ajrajczyk@bud.pcz.czest.pl, 2*mkosin@bud.pcz.czest.pl Keywords: processing of the stone, abrasive disks, optimization of the shape of tools, surface roughness.
A team from KTPBiM WB (Department of Building and Material Processes Technologies – Faculty of Building Engineering) has carried out a research concerning the quality evaluation of processing efficiency in local stonemason’s workshops in the Częstochowa region, which has demonstrated that a granite slab that has been sawn with a gang saw evenly and without deeper scratches can be ground much faster than a slab with deep scratches.
[2] Rajczyk J., Kosiń M., Methodology of Analyzing a New Geometry Design of a Friction Plate Effect on the Engineered Surfaces, Proceedings of the 3rd International Conference on Contemporary Problems in Architecture and Construction.

. // Journal of Civil Engineering and Management. 2011.
Safety of technological projects using multi-criteria decision making methods. // Journal of Civil Engineering and Management. 2011.
Analysis of opportunities and practical experience of application of nanotechnological methods // Journal of Engineering and Construction. 2009. №6, pp. 25-33 [17] A.
Efficiency of water of hydration activated by carbon nanostructures // Journal of Engineering and Construction. 2009. № 1, pp. 40–45

Acknowledgement Funding, personnel and test supports from Faculty of Engineering Kasetsart University are greatly appreciated.
Modern Methods and Advances in Structural Engineering and Construction.
[12] Heidari A., and Hasanpour B., Effect of Waste Bricks Powder of Gachsaran Company as a Pozzolanic Material, Journal of Civil Engineering (BHRC)( 2013)14(5):755-763
[15] Thaipoom S., Srisoros W., "Expansion and Mechanical properties of ASR Affected Concrete in Thailand" (in Thai), the 18 th National Civil Engineering Conference of Thailand, Chiengmai, Thailand, 2013

Construction Technology of Durable Concrete in Permafrost District Bing Du1, 2 , Quan-Xin YI 1,a 1 Faculty of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China 2 Department of Scientific & Research Development, The Sixteen Bureau Corp. of China Railway, Beijing 100088, China a yiquanxin1314@eyou.com Keywords: Durability; permafrost; frozen soil district; frost resistance Abstract.
[2] Construction and acceptance specification of Railway concrete and masonry engineering (China Railway Press)
[3] Standards compilation of materials& experimental technique of railway engineering, scientific information bank in construction faculty of railway department
[4] Testing manual of civil engineering (Tongji University Press)

Dynamic Response of Vehicle-Bridge Coupled Oscillation Subjected to Velocity-varied Moving Loads Fuliang Mei 1, a and Guiling Li 1,b 1 Institute of Civil & Engineering, Jiaxing University, Jiaxing ,Zhejiang ,314001,China aFlmei2005@126.com, bLgljx@126.com Keywords: Vehicle-bridge coupled vibration model, Two-freedom-degree vehicle model (TFDVM), Euler-Bernoulli beam, Velocity-varied moving load, Dynamic response.
References [1]X.Y.Huang,Y.J.Chen, H.F.Sheng,et al: Journal of Highway and Transportation Research and Development,Vol.23(2008)No.12,p.97(in Chinese) [2] X.H.Zhao,X.D.Zhang,Z.Chen,et al: Journal of Wuhan University of Technology (Transportation Science& Engineering),Vol.35(2011)No.2,p.349(in Chinese) [3] S.N.Luo,J.L.Yang: China Civil Engineering Journal,Vol.42(2009)No.1,p.49(in Chinese) [4] J.P.Pu, P.Liu,K,Zhou,et al: Bulletin of Science and Technology,Vol.25(2009)No.1,p.83(in Chinese) [5] S.R.Gui,S.S.Chen,S.Q.Xu: Journal of East-China Jiaotong University, Vol.24(2007)No.1,p.35 (in Chinese) [6] G.T.Michaltsos:Journal of Sound and Vibration,Vol.258(2002)No.2,p.359 [7] X.
Peng,Z.J.Liu,J.W.Hong: Engineering Mechanics, Vol.23(2006)No.6,p.25(in Chinese) [8] S.Y.Chen, H.Xia, J.W.Zhan,et al: China Railway Science,Vol.28(2007)No.6,p.41(in Chinese) [9] S.Q.Wang,H.Xia, W.W.Guo,et al: Journal of Vibration and Shock,Vol.29(2010)No.2,p.26 (in Chinese)

Load Transfer Mechanism of Setp Cross-Section Pipe Pile Liu Jie 1, a,Cui Bin 1,b,Yang Qingguang 1,c ,Huang Fuan1,d 1 College of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China a2860557969@qq.com, b602188839@qq.com, cyqg1210@126.com, d40721799@qq.com Keywords:setp cross-section pipe pileunimate cross-section pipe pile;diameter ratio;FLAC3D Abstract.
Introduction It's showed that concrete pipe pile has such advantages as simple making, reliable quality, considerable economic benefit and nice adaptability to all kinds of condition and it has been popularly applied in variety fields of civil engineering.
In order to give full play to the bearing capacity of shallow soil and improve the working properties of pile foundation pile, a new kind of ladder-type variable cross-section pipe-pile which upper tube section diameter is larger than lower tube section diameter and its new composite foundation technique is provided in this paper, the application range of pipe pile is extended and the cost of foundation engineering is reduced by studying on its work property The bored piles with variable cross sections has got a fully application in national key project Sutong Yangtzeriver Highway Bridge[1].Fang Tao obtained some significant and theory value conclusions by studying on working properties of ladder-type variable cross-section bored pile which are based on FLAC3D and indoor model test[2-5].The current technical specification and traditional theory of pile foundation can not analysis working mechanism and force character properly.
[3]Z.J.Wu,D.X.Geng and T.Fang: submitted to Railway Engineering(2011) [4]T.Fang: submitted to Chongqing Chongqing University(2012) [5]T.Fang,X.R.Liu: submitted to Rock and Soil Mechanics(2012)

Application of Rock-wool in Outer-wall External Thermal Insulation System Jiaolong Guo 1, a, Qiang Du 1,b, Lu Lu2,c 1 School of Civil Engineering, Chang’an University, Xi’an 710061,China 2 School of Civil Architecture, Xi'an University of Technology, Xi’an 710054,China aguojiaolong_love@126.com, bqiang_du@126.com, c2o2olulu@qq.com Keywords: rock-wool, outer-wall external thermal insulation Abstract.
Synthetically, drilling anchoring technique is the best choice. 3.2 Leveling blanket and protective layer of Rock wool board The main problem of engineering application on rock wool board is the crack between the leveling layer and protective layer materials.
Analyzing the rock wool board exterior insulation engineering, we can found the materials between the leveling layer and protective layer is the ordinary cement mortar.
Combined with practical engineering experience, we choose the flexible waterproof putty which has the function of crack. 3.3 construction design of Rock wool board In the process of research, the author identified two kinds construction design of rock wool board ETICS: anchorage and cast-in-place.

Conductive Metakaolin Geopolymer with Steel Microfibres Cecílie Mizerová1,a*, Ivo Kusák1,b, Pavel Rovnaník1,c and Patrik Bayer1,d 1Brno University of Technology, Faculty of Civil Engineering, Veveří 331/95, 602 00 Brno, Czech Republic amizerova.c@fce.vutbr.cz, bkusak.i@fce.vutbr.cz, crovnanik.p@fce.vutbr.cz, dbayer.p@fce.vutbr.cz Keywords: metakaolin, geopolymer, steel microfibers, electrical resistance, mechanical properties, microstructure Abstract.
Their good mechanical performance, chemical resistance, thermal stability and other engineering properties predetermine their application in various multifunctional applications [2].
Correia, A review on smart self-sensing composite materials for civil engineering applications.
Science and Engineering 596(1) (2019) p 012014.

Beam Test Research on Bond Behavior between Steel Bar and Concrete in Salt-Frost Environment Gang Xu1, a, Tian-cheng Ai1, b, Qing Wang2, c and Jiang-bo Huang3,d 1College of Civil Engineering & Architecture,China Three Gorges University, Yichang,443002, China 2School of Civil engineering & Architecture, Central South University, Changsha, 410075, China 3Construction Bureau of Hongshan District, Wuhan, 430070, China apostxg@163.com, bpostatc@126.com, cpostwq@163.com, dhannibol@126.com Keywords: Salt-Frost Cycles; Bond Behavior; Beam Test Abstract: Salt-frost action is one of the main causes that induced the decrease of force resistance behavior of concrete structure in cold areas.
Acknowledgements The authors gratefully acknowledge the support provided by the key Technological Research and Development Programs of Ministry of Railways P.R.China (No.2008G031-18), Open Foundation of National Engineering Laboratory for High Speed Railway Construction and the Key Scientific Research Project of Hubei Education Department of China (No.
Journal of structural engineering,1988,114(3):717-726 [2] Zhao Juan, Ba Heng-jing, Zou Chaoying.