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Online since: October 2011
Authors: Xiu Li Wang, Lie Jiang
Calculation model on single layer lattice shell static and dynamic impact analysis
WANG Xiu-li1, a, JIANG Lei1, b
1School of Civil Engineering, Lan Zhou University of Technology, Lanzhou 730050, China
awangxl@lut.cn, bjianglei_xyyz@163.com
Keywords: calculation model; static characteristics; dynamic characteristics; combination of damping ratio; finite element analysis
Abstract.
In engineering design, in order to simplify the calculation, usually the lower part of the concrete support system and the upper lattice shell structure are considered separately, use fixed hinge support or elastic support to simulate the support case of lattice shell structure to calculate the upper structure, then the upper structure of the support reaction force added to the lower part of the structure to calculate the lower part of the structure.
Can be concluded from the above: Elastic support model and whole structure model's internal forces are close to in those three calculate models, hinge support model internal forces decrease on the main rib close to support area, lead to unsafe design, it is suggested that use the whole structure model as engineering design model as much as possible.
By these three calculate models main ribs and oblique bars force analysis shows: hinge support model near the support area main ribs and oblique bars internal forces serious deviation from the actual, resulting in unsafe design, therefore, the actual engineering design whole structure model must be used.
Acknowledgements This work was financially supported by Natural Science Foundation of China (51068019) References [1] Wang Ce and Shen Shizhao: Dynamic stability of single layer reticulated dome. edited by China Civil Engineering Journal. 33:6, 17-24. (2000) (in Chinese) [2] CAO Zi, AHANG Chao, AHANG Yi-gang, XUE Su-duo: A study on the dynamic interaction between lattice shells and the supporting structure. edited by Spatial Structures, 7:2, 19-26. (2001) (in Chinese) [3] CAO Zi and XUE Su-duo, WANG Xue-sheng, LIU Ying-chun: Selection of earthquake waves and values of damping ratio for space structures in aseismic analysis. edited by Spatial Structures, 14:3, 3-8. (2008) (in Chinese) [4] Cao Zi and Xue Suduo: SESIMIC ANALYSIS AND DESIGN OF SPETIAL STRUCTURES, Science Press. (2005) (in Chinese) [5] Shibata and Meter: A sozen substitute structure method for seismic design in R.C.
In engineering design, in order to simplify the calculation, usually the lower part of the concrete support system and the upper lattice shell structure are considered separately, use fixed hinge support or elastic support to simulate the support case of lattice shell structure to calculate the upper structure, then the upper structure of the support reaction force added to the lower part of the structure to calculate the lower part of the structure.
Can be concluded from the above: Elastic support model and whole structure model's internal forces are close to in those three calculate models, hinge support model internal forces decrease on the main rib close to support area, lead to unsafe design, it is suggested that use the whole structure model as engineering design model as much as possible.
By these three calculate models main ribs and oblique bars force analysis shows: hinge support model near the support area main ribs and oblique bars internal forces serious deviation from the actual, resulting in unsafe design, therefore, the actual engineering design whole structure model must be used.
Acknowledgements This work was financially supported by Natural Science Foundation of China (51068019) References [1] Wang Ce and Shen Shizhao: Dynamic stability of single layer reticulated dome. edited by China Civil Engineering Journal. 33:6, 17-24. (2000) (in Chinese) [2] CAO Zi, AHANG Chao, AHANG Yi-gang, XUE Su-duo: A study on the dynamic interaction between lattice shells and the supporting structure. edited by Spatial Structures, 7:2, 19-26. (2001) (in Chinese) [3] CAO Zi and XUE Su-duo, WANG Xue-sheng, LIU Ying-chun: Selection of earthquake waves and values of damping ratio for space structures in aseismic analysis. edited by Spatial Structures, 14:3, 3-8. (2008) (in Chinese) [4] Cao Zi and Xue Suduo: SESIMIC ANALYSIS AND DESIGN OF SPETIAL STRUCTURES, Science Press. (2005) (in Chinese) [5] Shibata and Meter: A sozen substitute structure method for seismic design in R.C.
Online since: June 2012
Authors: Zhao Han Wang, Chang Guo Xuan, Qiang Fu
Urban Water Consumption Forecasting Based on Projection Pursuit
Wang Zhaohan 1, a, Xuan Changguo 2,b FU Qiang3, c
1 School of Civil Engineering and Architecture, University of Jinan,Jinan, Shandong, China
2 Shandong Hi-speed Group Co., Ltd, Jinan, Shandong, China
3 School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang, China
amoon1989@163.com, bcea_wangzh@ujn,edu,cn, cfuqiang@163.com
Keywords: energy saving; urban; water supply; forecasting
Abstract.
The practice proves that the forecasting precision of this model reaches the engineering requirements, and it provides a new approach for water consumption forecasting and analysis.
Journal of Hydraulic Engineering (2002 in Chinese) [6] Jin Juliang, Wei Yiming.
Water Resources and Hydropower Engineering,(2002in Chinese)
The practice proves that the forecasting precision of this model reaches the engineering requirements, and it provides a new approach for water consumption forecasting and analysis.
Journal of Hydraulic Engineering (2002 in Chinese) [6] Jin Juliang, Wei Yiming.
Water Resources and Hydropower Engineering,(2002in Chinese)
Online since: June 2007
Authors: Qian Sheng, Y.H. Zhang, Y.M. Cheng
Cheng
2,c
1 Institute of Rock and Soil Mechanics, The Chinese Academy of Sciences, Wuhan 430071, China
2 Department of Civil and Structural Engineering, Hong Kong Polytechnic University, Hong Kong
ayhzhang@whrsm.ac.cn, bqsheng@whrsm.ac.cn, cymchen@polyu.edu.hk
Keywords: manifold method; hexahedron element; first-order function; 3D contact; underground
excavation
Abstract.
The application of 3D NMM in underground excavation is also presented and show good agreement with real engineering.
Shi: Discontinuous Deformation Analysis-A New Numerical Model for The Static and Dynamics of Block Systems, Ph.D Dissertation, Department of Civil Engineering, University of California, Berkeley, USA. (1988) [2] G.H.
Communications in Numerical Methods in Engineering, Vol. 18 (2002), p.877-884 [5] P.A.
Army Corps of Engineers, Washington DC (1985) [6] Y.Y.
The application of 3D NMM in underground excavation is also presented and show good agreement with real engineering.
Shi: Discontinuous Deformation Analysis-A New Numerical Model for The Static and Dynamics of Block Systems, Ph.D Dissertation, Department of Civil Engineering, University of California, Berkeley, USA. (1988) [2] G.H.
Communications in Numerical Methods in Engineering, Vol. 18 (2002), p.877-884 [5] P.A.
Army Corps of Engineers, Washington DC (1985) [6] Y.Y.
Online since: May 2011
Authors: Yi Sheng Su, Qi Liang Li, Yi Bin Yang, Xiang Hua Chen
Research on the mechanical properties of the castellated lightweight steel portal frame
Yisheng Su1, a, Qiliang Li1,b, Yibin Yang1,c, Xianghua Chen2,d
1College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
2XingJian college of Science and Liberal Arts, Guangxi University, Nanning 530004, China
asuyisheng@sina.com, bfeel1986@126.com, cyangtuobaye@163.com, dyangyu840301@163.com
Keywords: Castellated component, portal frame, bearing capacity, rigidity.
Nanning: Guangxi University College of Civil Engineering & Architecture, 2010.
Nanning: Guangxi University College of Civil Engineering & Architecture, 2005.
Nanning: Guangxi University College of Civil Engineering & Architecture, 2010.
Nanning: Guangxi University College of Civil Engineering & Architecture, 2005.
Online since: September 2011
Authors: Huseyın Onur Tezcan, Fatih Yonar, Sabahat Topuz Kiremitci
A Mode Choice Model For A Public Transport Transfer Center In Istanbul
Huseyin Onur Tezcan1,a, Fatih Yonar2,b and Sabahat Topuz Kiremitci3,c
1Istanbul Technical University, Civil Engineering Faculty, Turkey
2Istanbul Technical University, Civil Engineering Faculty, Turkey
3Istanbul Technical University, Civil Engineering Faculty, Turkey
atezcanhu@itu.edu.tr, bfyonar@itu.edu.tr, ctopuzsa@itu.edu.tr
Keywords: Modal choice, Transfer center, Multinomial logit model
Abstract.
Online since: April 2015
Authors: Marcela Karmazínová
Dynamic tests have been performed in the common testing room of the Institute of Metal and Timber Structures of the Faculty of Civil Engineering at the Brno University of Technology (city of Brno, Czech Republic).
Company” (original in Czech language), Brno University of Technology – Faculty of Civil Engineering, Brno, (2011) 17
Company” (original in Czech language), Brno University of Technology – Faculty of Civil Engineering, Brno, (2014) 20
Company” (original in Czech language), Brno University of Technology – Faculty of Civil Engineering, Brno, (2011) 17
Company” (original in Czech language), Brno University of Technology – Faculty of Civil Engineering, Brno, (2014) 20
Online since: June 2013
Authors: Aleksandrs Korjakins, Andina Sprince, Leonids Pakrastinsh
Time-dependent Behavior of High Performance Fiber-reinforced Concrete
Andina Sprince1,a, Aleksandrs Korjakins1,b, Leonids Pakrastinsh1,c
1,2Faculty of Civil Engineering, Riga Technical University Azenes St. 16, Riga, LV-1048, Latvia
aandina.sprince@rtu.lv, baleks@latnet.lv, cleonids.pakrastins@rtu.lv
Keywords: PVA fibers, creep strain, crack propagation, compression strength, modulus of elasticity
Abstract.
Therefore, designers and engineers need to know the deformation properties of concrete and must be able to take them into account in the structure analysis [3].
Brandt, Fibre reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering, Composite Structures 86, 2008, pp. 3
Korjakins, Experimental study on creep of new concrete mixtures, Proceedings of the International Scientific Conference „Civil Engineering’11” of Latvia University of Agriculture, May 12-13, Jelgava 2011.
Therefore, designers and engineers need to know the deformation properties of concrete and must be able to take them into account in the structure analysis [3].
Brandt, Fibre reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering, Composite Structures 86, 2008, pp. 3
Korjakins, Experimental study on creep of new concrete mixtures, Proceedings of the International Scientific Conference „Civil Engineering’11” of Latvia University of Agriculture, May 12-13, Jelgava 2011.
Online since: March 2006
Authors: Chung Sik Yoo, Byung Seok Choi, Hye Young Jung
Dept. of Civil & Envir.
Engrg., Suwon, Korea 2 Dodam Engineering & Construction, An-Yang, Korea 3 Sungkyunkwan Univ.
Dept. of Civil & Envir.
Geotechnical Aspects of Underground Construction in Soft Ground, London (1996), p. 6592664 [4] Harris C.W. and O'Rouke T.D.: "Response of Jointed Cast Iron Pipelines to Parallel Trench Construction", Geotechnical Engineering Report 83-5, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY (1983), p. 224 [5] Yoo C.: Personal Communication (2003), p. 5
Engrg., Suwon, Korea 2 Dodam Engineering & Construction, An-Yang, Korea 3 Sungkyunkwan Univ.
Dept. of Civil & Envir.
Geotechnical Aspects of Underground Construction in Soft Ground, London (1996), p. 6592664 [4] Harris C.W. and O'Rouke T.D.: "Response of Jointed Cast Iron Pipelines to Parallel Trench Construction", Geotechnical Engineering Report 83-5, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY (1983), p. 224 [5] Yoo C.: Personal Communication (2003), p. 5
Online since: January 2010
Authors: Wen Huan Chien, Li Chen, Chih Chiang Wei, Hsun Hsin Hsu, Tai Sheng Wang
Modeling Slump Flow of High-Performance Concrete Using a
Back-Propagation Network
Wen-Huan Chien1, a, Li Chen1, b , Chih-Chiang Wei2, c , Hsun-Hsin Hsu1, d
and Tai-Sheng Wang1, e
1
Department of Civil Engineering and Engineering Informatics, Chung Hua University, No. 707,
Sec.2, WuFu Rd., Hsinchu, Taiwan 300, R.O.C.
2
Department of Information Management, ToKo University, No.51, Sec. 2, Syuefu Rd., Puzih City,
Chiayi County 61363, Taiwan, R.O.C.
Comput Civil Eng.
Yeh: Journal of Materials in Civil Engineering, ASCE Vol. 18(4) (2006) p. 597-604
Comput Civil Eng.
Yeh: Journal of Materials in Civil Engineering, ASCE Vol. 18(4) (2006) p. 597-604
Online since: May 2017
Authors: Martin Tipka, Jitka Vaskova
Modulus of Elasticity in Tension for Concrete and Fibre Reinforced Concrete
TIPKA Martin 1, a *and VAŠKOVÁ Jitka 2,b
1-2Faculty of Civil Engineering, Czech Technical University in Prague,
Thákurova 7/2077, Prague, Czech Republic
amartin.tipka@fsv.cvut.cz, bjitka.vaskova@fsv.cvut.cz
Keywords: Concrete, Fibre Reinforced Concrete, Uniaxial Tension Test, Tensile Strength, Strain, Modulus of Elasticity
Abstract.
In last years there was a research at the Department of Concrete and Masonry Structures, Faculty of Civil Engineering CTU in Prague, its goal was simplifying the uniaxial tension test of cementitious composites.
In: Juniorstav 2010, University of Technology, Faculty of Civil Engineering, Brno, 2010 [2] ČSN ISO 1920-10: Testing of concrete - Part 10: Determination of static modulus of elasticity in compression (in Czech).
In last years there was a research at the Department of Concrete and Masonry Structures, Faculty of Civil Engineering CTU in Prague, its goal was simplifying the uniaxial tension test of cementitious composites.
In: Juniorstav 2010, University of Technology, Faculty of Civil Engineering, Brno, 2010 [2] ČSN ISO 1920-10: Testing of concrete - Part 10: Determination of static modulus of elasticity in compression (in Czech).