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Online since: October 2011
Authors: Qing Ning Li, Tian Li Wang, Da Lin Hu
The Review about a New Type of Bridge Structure --- Semi–Integral Abutment Jointless Bridge
Tianli Wang 1, a, Qingning Li 1,b and Dalin Hu 2,c
1 Dept of Civil engineering, Xi’an University of Architecture & Technology.
These problems exist around the world, and many professional engineers try to find a high-powered expansion device, unfortunately they failed.
Making the Jointless Bridge come true is a great contribution to the bridge engineering.
Its mechanical performance is so excellent that it should be wide recommended and applied in highway bridge engineering.
Portland Cement Association Engineered Concrete Structures. 1999,12(2):86-92
These problems exist around the world, and many professional engineers try to find a high-powered expansion device, unfortunately they failed.
Making the Jointless Bridge come true is a great contribution to the bridge engineering.
Its mechanical performance is so excellent that it should be wide recommended and applied in highway bridge engineering.
Portland Cement Association Engineered Concrete Structures. 1999,12(2):86-92
Online since: May 2014
Authors: Wan Ling Li, Xiang Jun Song
The relationship of integrated supportability, reliability, maintainability and testability, these engineering, were shown as figure 1.
system combat readiness intact demand supportability design demand support system and resource demand reliability engineering ●supervise and control ●design and analyses ●test and evaluate maintainability engineering testability engineering integrated support ●harmonize confirm demand ●bring into plan ●plan develop support resource ●offer support resource bring forward, harmonize, confirm, disassemble mission succeed demand use demand use demand design demand engineering and manage ploy ●supervise and control ●design and analyses ●test and evaluate ●supervise and control ●design and analyses ●test and evaluate Fig.1 The relationship of integrated supportability, reliability, maintainability and testability 2.2 Qualitative requirements 2.2.1 Supportability integrated requirements Equipment System supportability integrated qualitative requirements were established by reducing difficulty of support, integrated universal
Planning support resources would be involved in all stages among equipment life cycle, such as requirements and constraints for support resources put forward in the demonstration stage, initial support resource requirements put forward in the solution stage, detailed resource demand confirmed, combined and optimized in the engineering development stage, support resources requirements adjusted and consummated in initial deploying and use stage and even the supply problems of support resources considered after stopping production.
Discussion on Integrated Logistic Support and Civil-military Integration Equipment Support [J].
system combat readiness intact demand supportability design demand support system and resource demand reliability engineering ●supervise and control ●design and analyses ●test and evaluate maintainability engineering testability engineering integrated support ●harmonize confirm demand ●bring into plan ●plan develop support resource ●offer support resource bring forward, harmonize, confirm, disassemble mission succeed demand use demand use demand design demand engineering and manage ploy ●supervise and control ●design and analyses ●test and evaluate ●supervise and control ●design and analyses ●test and evaluate Fig.1 The relationship of integrated supportability, reliability, maintainability and testability 2.2 Qualitative requirements 2.2.1 Supportability integrated requirements Equipment System supportability integrated qualitative requirements were established by reducing difficulty of support, integrated universal
Planning support resources would be involved in all stages among equipment life cycle, such as requirements and constraints for support resources put forward in the demonstration stage, initial support resource requirements put forward in the solution stage, detailed resource demand confirmed, combined and optimized in the engineering development stage, support resources requirements adjusted and consummated in initial deploying and use stage and even the supply problems of support resources considered after stopping production.
Discussion on Integrated Logistic Support and Civil-military Integration Equipment Support [J].
Online since: June 2012
Authors: Chong Zhi Li, wang qin, Jun Chao Liu, Mo Yi Xu
Study and application of a modified agent GHPC-1 for green high-performance concrete
Qin Wanga, Chongzhi Lib, Junchao Liuc, Moyi Xud
Beijing university of civil engineering and architecture,
Key laboratory of Beijing green building and energy saving technology, Beijing, 100044
awangqin@bucea.edu.cn,blichongzhi@bucea.edu.cn,cqq163ac@163.com, dmike.xu1989@gmail.com
Keywords: Green high-performance concrete; Modified agent; Workability; Strength
Abstract: A modified agent GHPC-1 for green high-performance concrete was composed of the strength-increasing groups of organic alcohol amine, the slump-retaining groups of carboxylate polymer and the workability-stabilizing groups of amide.
Introduction High performance concrete and steel reinforced concrete is the main structure engineering material of 21 century.
In the practical engineering, the concrete material is very complex and the optimum mix proportion obtained in the laboratory is unsuitable for the practical engineering and further concentration should be paid to the high-performance concrete material [2].
In a word, the two difficult problems which should be resolved in the practical engineering is unstable workability of green concrete and low intensity of hardened concrete.
(2) According to the mix proportion of the practical engineering C30 and C50 cement, compare the different usage method of modified agent GHPC-1.
Introduction High performance concrete and steel reinforced concrete is the main structure engineering material of 21 century.
In the practical engineering, the concrete material is very complex and the optimum mix proportion obtained in the laboratory is unsuitable for the practical engineering and further concentration should be paid to the high-performance concrete material [2].
In a word, the two difficult problems which should be resolved in the practical engineering is unstable workability of green concrete and low intensity of hardened concrete.
(2) According to the mix proportion of the practical engineering C30 and C50 cement, compare the different usage method of modified agent GHPC-1.
Online since: July 2016
Authors: Phuong Tran, Abdallah Ghazlan, Tuan D. Ngo
Introduction
Due to fast-growing military applications, biological structures, meta-materials, woven fabrics, nano-polymers, composite sandwich panels and many others have recently been investigated by structural research engineers because of their unmatched mechanical performance over traditional engineering materials [1-11].
Specifically, fibre reinforced composite materials exhibit comparable strength to high strength steels with a lower material density, making them ideal for civil and military applications.
This configuration has been found to be the most effective in terms of achieving simultaneously high strength and toughness, which are typically mutually exclusive in typical engineering materials.
Engineering Fracture Mechanics, 2008. 75(14): p. 4217-4233
International Journal of Impact Engineering, 2013. 51: p. 13-22
Specifically, fibre reinforced composite materials exhibit comparable strength to high strength steels with a lower material density, making them ideal for civil and military applications.
This configuration has been found to be the most effective in terms of achieving simultaneously high strength and toughness, which are typically mutually exclusive in typical engineering materials.
Engineering Fracture Mechanics, 2008. 75(14): p. 4217-4233
International Journal of Impact Engineering, 2013. 51: p. 13-22
Online since: January 2012
Authors: Xiao Yan Li, Zhi Fen Cen, Yan Yan Wu
Dynamic Character Study on Cool Thermal Energy Storage Process of Storage Tank for Air-conditioning System
Xiao-Yan LI1, Yan-Yan Wu2 and Zhi-Fen CEN1
1School of Energy and Civil Engineering, Harbin University of Commerce, Harbin, China
2School of Computer and Information Engineering, Harbin University of Commerce, Harbin, China
e-mail:mylxy6168@sina.com, lxy6168@sina.com
Keywords-tstorage tank; spherical capsule; phase change material; storage characteristics
Abstract—Mathematical model of the storage tank for air-conditioning condition was established, the dynamics character of a new type of PCM in the storage tank was studied., and the model was numerical simulated by the method of heat capacity.
In the practical engineering application, flow rate of HTF should be selected reasonably for the total cold thermal energy storage is mot much affected by flow rate.
Henríquez, “Numerical and experimental study of spherical capsules packed bed latent heat storage system,” Applied Thermal Engineering, vol. 22, 2002, pp. 1705–1716
Ibrahim, “Thermal modeling of a packed bed thermal energy storage system during charging,” Applied Thermal Engineering, vol. 29, 2009, pp. 187–196
Zhu, “A General Model for Analyzing the Thermal Performance of the Heat charging and Discharging Processes of Latent Heat Thermal Energy Storage Systems,” Journal of Solar Energy Engineering, vol. 23, 2001, pp. 232–236
In the practical engineering application, flow rate of HTF should be selected reasonably for the total cold thermal energy storage is mot much affected by flow rate.
Henríquez, “Numerical and experimental study of spherical capsules packed bed latent heat storage system,” Applied Thermal Engineering, vol. 22, 2002, pp. 1705–1716
Ibrahim, “Thermal modeling of a packed bed thermal energy storage system during charging,” Applied Thermal Engineering, vol. 29, 2009, pp. 187–196
Zhu, “A General Model for Analyzing the Thermal Performance of the Heat charging and Discharging Processes of Latent Heat Thermal Energy Storage Systems,” Journal of Solar Energy Engineering, vol. 23, 2001, pp. 232–236
Online since: June 2005
Authors: Seung Boo Jung, Jong Woong Kim, Sun Kyu Park
Optimum Shear Height for Evaluation of Pb-Free Solder Ball Shear Strength
Jong-Woong Kim
1,a, Sun-Kyu Park2,b and Seung-Boo Jung
3,c
1,3
Department of Advanced Materials Engineering, Sungkyunkwan University
2
Department of Civil and Environmental Engineering, Sungkyunkwan University
300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, South Korea.
The JEDEC (Joint Electronic Devices Engineering Council) BGA ball shear standard (JESD22-B117) prescribed that the gap between the edge of the shear ram and the surface of substrate should be larger than 0.05 mm and smaller than 25% of the ball height [2].
From the engineering point of view, too high shear height should be kept away from the test conditions.
Jung: Materials Science and Engineering A Vol. 371 (2004), p. 267
Liao: Materials Science and Engineering A Vol. 358 (2003), p. 134.
The JEDEC (Joint Electronic Devices Engineering Council) BGA ball shear standard (JESD22-B117) prescribed that the gap between the edge of the shear ram and the surface of substrate should be larger than 0.05 mm and smaller than 25% of the ball height [2].
From the engineering point of view, too high shear height should be kept away from the test conditions.
Jung: Materials Science and Engineering A Vol. 371 (2004), p. 267
Liao: Materials Science and Engineering A Vol. 358 (2003), p. 134.
Online since: December 2010
Authors: Hai Bo Jiang, Ling Ming Yang, Ai De He
The Rehabilitation of Pile Foundation of a Concrete Continous Bridge in Guangzhou City
Haibo JIANG1,a, Lingming YANG1,b and Aide HE1,c
1Faculty of Civil and Transportation Engineering, Guangdong University of Technology, 510006, Guangzhou, China
aemail:hbjiang@gdut.edu.cn, bemail:ouyanglingming@163.com, cemail:heaide@yahoo.cn
Keywords: Bridge rehabilitation; Pile foundation; Load bearing capacity; Finite element method
Abstract.
Railway Engineering, p.98~100, 2009, In Chinese
Railway Engineering, p.5~7, 2003, In Chinese
Earthquake Geotechnical Engineering, Vols 1-3p: 591-597,1999
Journal of Rock Mechanics and Engineering, p.2795~2801, 2005, In Chinese
Railway Engineering, p.98~100, 2009, In Chinese
Railway Engineering, p.5~7, 2003, In Chinese
Earthquake Geotechnical Engineering, Vols 1-3p: 591-597,1999
Journal of Rock Mechanics and Engineering, p.2795~2801, 2005, In Chinese
Online since: September 2011
Authors: Wei Wang, Shi Chao Liao, Peng Ding, Dong Zhu Chen, Zhao Peng Ni, Guang Ming Yin
The causes inducing crack and water leakage in tunnel lining and its prevention and treatment [J]( Railway Engineering, 2003(1):23-25)
[3] Wang Hualao, Liu Xuezeng, LI Ning, Xie Dongwu.
Safety Evaluation of Tunnel Lining with Longitudinal Cracks and Reinforcement Design[J](Chinese Journal Of Rock Mechanics And Engineering, 2010, 29(z1):2651-2656) [4] Xu Shiliang, Liu Jianqiang etc.
Double-K fracture theoretical analysis and crack width calculation of hydraulic pressure tunnel lining [J] (China Civil Engineering Journal,2010. 43(1)114-124) [5] Dai ChengYuan, HAN Ting.
Crack analysis and its propagation of the tunnel concrete lining [J](Geotechnical Engineering World, 2005, 8(12):71-73) [6] Xu Shilang.
Introduction to the Calculation of External Water Pressure of Tunnel Lining [J] (Chinese Journal of Rock Mechanics and Engineering, 2002, 21(9):1339-1343) [9] ZHU bofang.
Safety Evaluation of Tunnel Lining with Longitudinal Cracks and Reinforcement Design[J](Chinese Journal Of Rock Mechanics And Engineering, 2010, 29(z1):2651-2656) [4] Xu Shiliang, Liu Jianqiang etc.
Double-K fracture theoretical analysis and crack width calculation of hydraulic pressure tunnel lining [J] (China Civil Engineering Journal,2010. 43(1)114-124) [5] Dai ChengYuan, HAN Ting.
Crack analysis and its propagation of the tunnel concrete lining [J](Geotechnical Engineering World, 2005, 8(12):71-73) [6] Xu Shilang.
Introduction to the Calculation of External Water Pressure of Tunnel Lining [J] (Chinese Journal of Rock Mechanics and Engineering, 2002, 21(9):1339-1343) [9] ZHU bofang.
Online since: December 2011
Authors: Hai Chao Feng, Yi Lun Liu, Bao Yu Xu, Xu Dong Wang
Strip Rolling Mill Random Vibration Analysis Based on Pseudo-excitation Method
Baoyu Xu1,2,a, Xudong Wang1,b, Yilun Liu2,c and Haichao Feng1,d
1School of Mechanical & Power Engineering, Henan Polytechnic University, Jiaozuo 454000, China
2College of Mechanical & Electrical Engineering, Central South University, Changsha 410083, China
axubaoyu@hpu.edu.cn, bwangxd@hpu.edu.cn, cylliu@mail.csu.edu.cn, dfhc@hpu.edu.cn
Keywords: five-octave mill, roll gap, pseudo-excitation method, power spectral density (PSD), stochastic dynamics model
Abstract: The five-octave mill stochastic dynamics model was established, and then constructed the virtual rolling force excitation, converted random excitation into the rolling force deterministic harmonic excitation by taking advantage of pseudo-excitation method, finally the variance and power spectral density dynamic random changes in the roll gap was Obtained .
Pseudo-excitation algorithm Professor Lin Jiahao's pseudo-excitation method has been widely used in civil engineering, marine engineering, etc.
It provides a solid theory and practical foundation for researching the stochastic dynamics characteristics of the extensive large-scale and complex engineering system applying the rich theoretical results of random vibration.
Acknowledgements This work was supported by the National Natural Science Foundation of China (NO. 61074095), and Henan Outstanding Person Plan (NO. 104200510021), and the Open Found of the Key Laboratory for Metallurgical Equipment and Control of Ministry of Education in Wuhan University of Science and Technology (2009A14) and provincial open laboratory for control engineering key disciplines in Henan polytechnic university (2009003).
Pseudo-excitation algorithm Professor Lin Jiahao's pseudo-excitation method has been widely used in civil engineering, marine engineering, etc.
It provides a solid theory and practical foundation for researching the stochastic dynamics characteristics of the extensive large-scale and complex engineering system applying the rich theoretical results of random vibration.
Acknowledgements This work was supported by the National Natural Science Foundation of China (NO. 61074095), and Henan Outstanding Person Plan (NO. 104200510021), and the Open Found of the Key Laboratory for Metallurgical Equipment and Control of Ministry of Education in Wuhan University of Science and Technology (2009A14) and provincial open laboratory for control engineering key disciplines in Henan polytechnic university (2009003).
Online since: January 2013
Authors: Yun Yun Xu, Tao Zhang, Zhen Rong Lin
As a new building materials, concrete can make the best of its aggregate outstanding advantages of the component easy molding increasingly widely used in civil and hydraulic engineering.
Especially in heavy traffic pavement engineering, these weaknesses with the improvement of the strength of concrete is particularly prominent.
Durability is the basic performance of the majority of construction materials and structural engineering.
Highway Engineering, 2012(7): 59-61 [3] Rong-xi Shen, Qi CUI, Qing Li.
Traffic Engineering and Technology for National Defence, 2012(2): 20-22 [7] Jin Lv.
Especially in heavy traffic pavement engineering, these weaknesses with the improvement of the strength of concrete is particularly prominent.
Durability is the basic performance of the majority of construction materials and structural engineering.
Highway Engineering, 2012(7): 59-61 [3] Rong-xi Shen, Qi CUI, Qing Li.
Traffic Engineering and Technology for National Defence, 2012(2): 20-22 [7] Jin Lv.