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Comparison and Review of Concrete-to-Concrete Interface Shear Resistance according to Major Design Codes ČAIROVIĆ Đorđe1,a *, GIRGLE František1,b , KOSTIHA Vojtěch1,c, KADLEC Jaroslav1,d and ŠTĚPÁNEK Petr1,e 1BUT Brno, Faculty of Civil Engineering, Veveří 331/95, 602 00 Brno, Czech Republic acairovic.d@fce.vutbr.cz, bgirgle.f@fce.vutbr.cz, ckostiha.v@fce.vutbr.cz, dkadlec.j@fce.vutbr.cz, estepanek.p@fce.vutbr.cz Keywords: Interface shear resistance, shear-friction, lightweight concrete, semi-precast structures, precast structures.
Lightweight aggregate concrete (LWAC) classified as LC 20/22 in accordance with EN 206-1 with a density of 1200kg/m3 was developed within research and development activities on Faculty of Civil Engineering, BUT (for more information see [1]).

Rohanské nábřeží 68, 180 00 Prague 8, Czech Republic 4Faculty of Civil Engineering, CTU in Prague, Thákurova 7, 166 29 Prague 6, Czech Republic avitek@metrostav.cz, bdavid.citek@cvut.cz, ckolisko@cvut.cz, drobert.coufal@tbg-beton.cz, epavel.jursik@gmail.com Keywords: UHPC, shear connection, composite steel concrete beams, perforated steel sheet, bond.
Fibre Concrete 2013 - Technology, Design, Application, Prague: Faculty of Civil Engineering, Czech Technical University in Prague, 2013, p. 407-414.

Ministry of Education and Science of the Russian Federation, Volgograd State University of Architecture and Civil Engineering, VolgGASU, Volgograd, 2015
Y., Concrete strength and crack resistance control, in: Procedia Engineering 2.
Univ. of Archit. and Civil Eng.

Wu6 1,2 Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China. 3,4,5,6 China railway 18th bureau group Co., Ltd, Tianjin 300222, China.
Acknowledgments This project was supported by Exoteric Science Foundation of Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Hohai University and Exoteric Science Foundation of Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University.

Effect of Microcracks on the Toughness of Particulate Composites Hongchang Qu1,3,a, Xiaozhou Xia2,b, Zhiqiang Xiong3,c 1Lushan College of Guangxi University of Technology, liuzhou, 545616, P.R.China 2Faculty of Civil and Transportation Engineering，Guangdong University of Technology，Guangzhou,510006, P.R.China 3Department of Civil and Architecture Engineering, Guangxi University of Technology, Liuzhou 545006, P.R.China aqhc410603@126.com, bXiaxiaozhou@163.com, cxzq163@yeah.net Keywords: Particulate composites; Damage; Toughening; Shielding effect; Stress intensity factor Abstract: The crack tip region in an elastic composite can be separated into three different regions. based on a simple rate-independent phenomenological constitutive model, the path independence of the J-integral and the concept of cracktip shielding, the maximum radii R of the damage saturation zone is obtained.

Behavior of Reinforced Concrete Columns with ‘T’-shaped Cross Section after Exposure to Fire Yuye Xu1, a, Bo Wu1, b, Ronghui Wang1, c, Ming Jiang2, d 1State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, Guangdong, 510640, China 2College of Civil Engineering, Huaqiao University, Xiamen, Fujian, 361021, China ayuyexu@hqu.edu.cn, bbowu@scut.edu.cn, crhwang@scut.edu.cn, djulie14159@hqu.edu.cn Key words: Reinforced Concrete, Column, ‘T’-shaped Cross Section, Fire, Residual Strength, Practical Calculation Method.
In general, it is not easy to simulate the residual behavior of concrete members after fire, and moreover civil engineers do not always have the required kind of numerical tool at their disposal, it is important to develop simplified methods [6-7].

Jiří Bydžovský, CSc. 3 1,2,3 Brno University of Technology, Faculty of Civil Engineering, Veveří 95, 602 00 Brno, Czech Republic 1dufka.a@fce.vutbr.cz, 2melichar.t@fce.vutbr.cz, 3bydzovsky.j@fce.vutbr.cz Keywords: secondary protection of concretes, chemically aggressive environment, alkali activated slag, service life of construction.
Habilitation thesis, 2012, Brno University of Technology, Faculty of Civil Engineering, [2] Rakhimova, N.

Torsional-Flexural Critical Force for Various Boundary Conditions Ivan Baláž1,a *, Michal Kováč1,b , Tomáš Živner1,c and Yvonna Koleková2,d 1Slovak University of Technology in Bratislava, Faculty of Civil Engineering, Department of Steel and Timber Structures, Radlinskeho 11, SK-81005 Bratislava, Slovakia 2 Slovak University of Technology in Bratislava, Faculty of Civil Engineering, Department of Structural Mechanics, Radlinskeho 11, SK-81005 Bratislava, Slovakia aivan.balaz@stuba.sk, bmichal.kovac@stuba.sk, ctomas.zivner@stuba.sk, dyvona.kolekova@stuba.sk Keywords: Torsional-flexural critical force; thin-walled metal members, monosymmetric cross-section; torsional and flexural boundary conditions.

Takemura, Mixture examination of the high performance concrete applied to reverse placing technique, Japan Society of Civil Engineers, Collection of lecture outlines of the 68th annual academic lecture meeting, No.5 (2013) 1141-1142 [3] R.
Nemoto, Experimental examination about the construction-related evaluation of the concrete to use for casting-in-place pile, Collation/inspection system study 341 subcommittee report of the construction performance of the concrete of Japan/ Society of Civil Engineers, 2001 [4] S.

An Effect of Sands of Different Grades on Structural and Mechanical Properties of Sand Concrete Evgenii Borisiuk1,a and Elizaveta Kochenkova1,b* 1Moscow State University of Civil Engineering, Yaroslavskoe shosse 26, Moscow, 129337, Russia aborisyukea@mgsu.ru, b*liza21@list.ru Keywords: Reduced Voidness, Sand Concrete, Fine Concrete, Composite, Sand for Concrete, Fine Sands, Optimization.
All tests were carried out using research equipment of The Head Regional Shared Research Facilities of the Moscow State University of Civil Engineering.