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Experimental study on axial tensile strength of low volume fraction of ternary hybrid fiber reinforced concrete Yuting Zhua, Dongtao Xiab *, Boru Zhouc Civil Engineering and Building Academy, Hubei University of Technology, Wuhan, Hubei, 430068 China a906604945@qq.com, bxdtxy@126.com, c610442996@qq.com Keywords: hybrid fiber; equivalent tensile strength; splitting strength; compressive strength Abstract.
Steel fiber has a significant crack resistance, strengthening and toughening effect on the concrete, and steel fiber reinforced concrete has been widely used in many engineering fields.
According to engineering experience, reference to foreign regulations and other factors, the relationship between the axial compressive strength and the cube compressive strength of the concrete can be determined as follows: (1) in which μfc = average of axial compressive strength in MPa; μfcu = average of cube compressive strength in MPa; αc1 = the ratio of prism strength and cube strength, on the C50 or below takes αc1 = 0.76, on the C80 or above takes αc1 = 0.82, intermediate values are by linear interpolation; αc2 = reduction coefficient as concrete considering brittle, on the C40 or below takes αc2 = 1.00, on the C80 or above takes αc2 = 0.87 intermediate values are by linear interpolation.
[5] Reinhardt H W, Cornelissen A W, Hordijk D A: Journal of Structural Engineering Vol. 112 (1986) , p. 2462
[7] China Construction Engineering Association: CECS 13:2009 Standard Test Methods for Fiber Reinforced Concrete (China planning press, Beijing 2009)

Fracture Characteristics of Intermittent Jointed Rock Masses under Blast Loading Peng Shao a, Yong Zhang b and Yong Nian He c School of Architecture and Civil Engineering, China University of Mining and Technology, China a spsyc@tom.com, byongzhang@cumt.edu.cn, cynhe@cumt.edu.cn Keywords: fracture characteristics, intermittent jointed rock masses, blast loading, initiation modes, coalescence modes Abstract.
It has been proved that the instability of many rock engineering, such as slopes and tunnels, etc., related directly to dynamic loading, especially to blast loading or seismic waves.
In the field of rock engineering, it is therefore quite important to understand the fundamental fracture characteristics of intermittent jointed rock masses.
Li: Chinese Journal of Geotechnical Engineering Vol. 22 (2000), p. 430 [4] Y.K Wu, H.
Chong: Soil dynamic and earth Engineering Vol. 17 (1998), p. 407 [5] Robina H.C.

Kouretzis1, a, Daichao Sheng1,b and Dong Wang2,c 1ARC Centre of Excellence for Geotechnical Science and Engineering, Faculty of Engineering and Built Environment, The University of Newcastle, Australia 2Centre for Offshore Foundation Systems, The University of Western Australia aGeorgios.Kouretzis@newcastle.edu.au, bDaichao.Sheng@newcastle.edu.au, cDong.Wang@uwa.edu.au Keywords: cone penetration, sand, elastoplastic model, relative density, centrifuge tests.
Yi, Centrifuge and numerical modelling of sand compaction pile installation, Ph.D. thesis, Department of Civil Engineering, National University of Singapore, 2009
I: mathematical foundation and hypoelasticity, Journal of Engineering Mechanics ASCE, 112-EM9 (1986) 966-987
Report CUED/D-SOILS/TR256, Cambridge University Engineering Department, UK, 1993

Binienda2,b* 1College of Energy Engineering, Zhejiang University, Hangzhou 310027, China. 2Department of Civil Engineering, University of Akron, Akron, OH 44325, U.S.A.
Goldberg, Finite Element Model for Failure Study of Two Dimensional Triaxially Braided Composite, Journal of Aersopsace Engineering, 2011, 24(2):170-180. ].
Journal of Aerospace Engineering, 2015, 28(5): 04014117. ]: the macroscale, which represents the structural scale for analysis; the mesoscale, representing the braided pattern of architecture; and the microscale, containing the fiber and matrix micro-constituents.
Binienda, Mesomechanical Model for Numerical Study of Two-Dimensional Triaxially Braided Composite, Journal of Engineering Mechanics, 2010, 136(11): 1366-1379. ] developed a mesoscale analysis model for TDTBC and used it for studies and simulation of straight sided tensile tests.

Fusion Engineering and Design 138, 2019, pp. 339-346
-X., Srivatsan T.S., A mechanism for the formation of equiaxed grains in welds of aluminum–lithium alloy 2090, Materials Science and Engineering: A, Volume 351, Issues 1–2, 2003, pp. 304-309, ISSN 0921-5093 [4] Kostrivas, Tasos & Lippold, J.C.. (1999).
Materials Science and Engineering A 608, 2014, pp. 199-206
Materials Science and Engineering A 677, 2016, pp. 182-192
[12] Smithmetal: 2099 Technical Datasheet. 2018, Online: https://www.smithmetal.com/ pdf/lithium/2099-lithium.pdf [13] Lin, Y., Zheng, Z.Q., Li, S.C., Effect of solution treatment on microstructures and mechanical properties of 2099 Al–Li alloy, Archives of Civil and Mechanical Engineering, Volume 14, Issue 1, 2014, pp. 61-71, ISSN 1644-9665, [14] Bárta, J., Marônek, M., Sahul, M., Dománková, M., Lopatková, M., Urminský, J., Pašák, M., Microstructure analysis of heat treated AW2099 Al-Li alloy laser beam welded joints.

V1 and Arya Aravind2, International Journal of Advances in Scientific Research and Engineering 03(5) (2017) 47-56
Mujalli, Effect of design properties of parent concrete on the morphological properties of recycled concrete aggregates, Engineering Science and Technology, an International Journal 22(1) (2019) 334-345
Ramli, EFFECT OF HYBRID FIBER ON THE MECHANICAL PROPERTIES OF RECYCLED AGGREGATE CONCRETE, Jurnal Teknologi (Sciences & Engineering) 80(5) (2018) 1-12
Rao, Strength and Permeability Characteristics of Fiber Reinforced High Performance Concrete with Recycled Aggregates, Asian Journal of Civil Engineering (Building and Housing) 13(1) (2012)
Vytlačilová, The fibre reinforced concrete with using recycled aggregates, International Journal of Systems Applications, Engineering & Development 5(3) (2011)

., LTD ,Jinan, China 2School of Civil Engineering, Shangdong Jianzhu University, Jinan, China achongyang999@163.com, bbgsh@sdjzu.edu.cn Keywords: concrete structures, transfer structure, high-rise building, structure scheme, design Abstract.
Scheme1: Reinforced Concrete Frame Column + RC Transfer Girders + Shear Wall Advantages: It is a normal design scheme, and is widely used in practical engineering.
It is easy to engineering calculations, design and construction, and the cost is more efficient.
According to the engineering characteristics, main features was selected in order to minimize the effect of the shear wall eccentric above the transfer storey as following: Transfer storey: The main rib of the axial layout of the frame-supporting column at the bottom: 600mm×3300mm, the main ribs at 12.2m pillar space: 800mm×3300mm; secondary ribs: 400mm×3300mm; the top plate thickness: 300mm, the base plate thickness: 250mm.
After some discussion with equipment engineer, the round hole is proved to be beneficial to the reduction of the stress concentration and enhancement processing.

Microscopic Mechanics of Debris Accumulation Body with Expansive Fine Grain and PFC Numerical Simulation Lining Zhenga, Qiang Xieb Wen Zhaoc Mengfei Quc and Chunhua Li c School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China a zhengning2003@163.com, b, Qxie2008@163.com, c wenzhao111@163.com Key words: Microscopic Mechanics; Debris Accumulation Body; Particle Flow Code; Numerical Simulation Abstract.
Engineering construction plan to implement the slope excavation in the mid-lower stained, so excavation stability and corresponding retaining protective measures become the project of key research contents.
References [1] Shuwu Li, Dexing Nie, Huijun Liu:Chinese Journal of Rock Mechanics and Engineering, Vol.s2 (2006),p.51-57,In Chinese
[11] ChaoLung Tang, Jyr Chinghu, Minglang Lin, Jacques Angelier Chiayu Lu, Changchan Yu, Hao-Tsu Chu:Engineering Geology.Vol.106 (2009),p.1–19
[15] Shiwen Liao: The expansive soil and the railway engineering(China Railway Press,beijing 1984),In Chinese.

Realistic Simulation of Railway Operation on the RAILBCOT Test Stand Juraj Gerlici 1,a, Tomáš Lack 2,b, Jozef Harušinec 3,c 1 Faculty of Mechanical Engineering, University of Žilina, University str. 1, SK-01026 Žilina, Slovak Republic 2 Faculty of Mechanical Engineering, University of Žilina, University str. 1, SK-01026 Žilina, Slovak Republic 3 Faculty of Mechanical Engineering, University of Žilina, University str. 1, SK-01026 Žilina, Slovak Republic ajuraj.gerlici@fstroj.uniza.sk, btomas.lack@fstroj.uniza.sk, cjozef.harusinec@fstroj.uniza.sk Keywords: wheel/rail contact, test stand, wheel tread wear, equivalent conicity, rail wheel testing.
The test stand is being as prototype realized at the Faculty of Mechanical Engineering laboratory working place.
[4] Gerlici J., Lack T. (2010) Contact Geometry Influence on the Rail / Wheel Surface Stress Distribution, Procedia Engineering Vol. 2, iss. 1 2010, (p.2249-2257)
Stirling: Civil-Comp Press Ltd, 2012, vol. 1, p. 1-13.

(Amberg engineering, 2022) 80% of the rock was excavated using the continuous TBM method and the remaining 20% consisted of the cyclic method of tunnelling using blasting.
The engineers developed a total of three classifications of the excavated tailings during the processing of the rock material.
Underground civil engineering structures for transport infrastructure have a great potential.
At first sight, underground engineering works may appear to create a major intrusion into the natural state of the landscape.
Kuschel, Rock Material Recycling in Tunnel Engineering, Applied Sciences 2020, 10(8), p.2722. https://doi.org/10.3390/app10082722