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The 2015 2nd International Conference on Engineering technology and Application

作者： Hanbing Zhu Yaxun Yang Weiya Fan Key Laboratory for Old Bridge Detection and Reinforcement Technology of Ministry of Transportation Chang'an University Chang'an University

Externally prestressed bridge can not only limit and reduce the cracks and deformation of the structure,improve the rigidity and bearing capacity of structure,improve the stress state of structure,but also have less interference for bridge operation when it is operating and have the good economic *** paper introduces the advantages and disadvantages of external prestressed strengthening technique,its calculation theory and construction technology described in detail,and finally the paper discusses the deficiency of existing research.

关键词： Externally prestressed Old bridge reinforcement theory of computation construction process

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Force-based and displacement-based reliability assessment approaches for highway bridges under multiple hazard actions

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Journal of Traffic and transportation Engineering(English Edition) 2015年第4期2卷 223-232页

作者： Chao Huang Jerry J.Shen Mi Zhou George C.Lee Department of Civil Structural and Environmental Engineering University at Buffalo Genex Systems/TFHRC 6300 Georgetown Pike Mc Lean 22101 USA National Engineering and Research Center for Highways in Mountain Area Key Laboratory for Old Bridge Detection and Reinforcement Technology of Ministry of Transportation Chang'an University

The strength limit state of American Association of State Highway and transportation Officials （AASHTO） Load and Resistance Factor Design （LRFD） bridge Design Spec/fications is developed based on the failure probabilities of the combination of non-extreme loads. The proposed design limit state equation （DLSE） has been fully calibrated for dead load and live load by using the reliability-based approach. On the other hand, most of DLSEs in other limit states, including the extreme events i and li, have not been developed and calibrated though taking certain probability-based concepts into account. This paper presents an assessment procedure of highway bridge reliabilities under the limit state of extreme event i, i. e,, the combination of dead load, live load and earthquake load. A force-based approach and a displacement-based approach are proposed and implemented on a set of nine simplL^ed bridge models. Results show that the displacement-based approach comes up with more convergent and accurate reliabilities for selected models, which can be applied to other hazards.

关键词： bridgeReliability assessmentMultiple hazardsLoadResistance

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The stress monitoring analysis of PC continuous beam bridge

The stress monitoring analysis of PC continuous beam bridge

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International Conference on Machine Tool technology and Mechatronics Engineering, ICMTTME 2014

作者： Yang, Ya Xun Fan, Wei Ya Key Laboratory for Old Bridge Detection and Reinforcement Technology of Ministry of Transportation Chang’an University Xi’anShaanxi China

ISBN: (纸本)9783038352464

According to the structure and construction characteristics of PC continuous beam bridge and combined with the construction monitoring method of continuous beam bridge, this paper introduces the girder stress strain test technology and method of prestressed concrete continuous box girder bridge, also analyzes the various factors which affect the stress test. After monitoring LinGang big bridge, draw the conclusion through the analysis of its stress and strain. © (2014) Trans Tech Publications, Switzerland.

关键词： Box girder bridges

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The linear monitoring analysis of PC continuous beam bridge

The linear monitoring analysis of PC continuous beam bridge

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International Conference on Machine Tool technology and Mechatronics Engineering, ICMTTME 2014

作者： Yang, Ya Xun Gong, Gao Key Laboratory for Old Bridge Detection and Reinforcement Technology of Ministry of Transportation Chang’an University Shaanxi Xi’an China

ISBN: (纸本)9783038352464

According to the structure and construction characteristics of prestressed concrete (PC) continuous beam bridge and combined with the construction monitoring method of continuous beam bridge, this paper introduces the girder deflection test technology and method of prestressed concrete continuous box girder bridge, also analyzes the various factors which affect the linear monitoring. And draw the conclusion through the analysis of the deflection and linear monitoring of LinGang big bridge. © (2014) Trans Tech Publications, Switzerland.

关键词： Prestressed concrete

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Development of bridge concealment engineering state detection technology

Development of bridge concealment engineering state detectio...

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2014 International Conference on Materials Science and Computational Engineering, ICMSCE 2014

作者： Zheng, Yi Zhang, Ke Chao Chen, Jian Zhang Research Institute of Highway Ministry Transport Beijing 10088 China Key Laboratory of Old Bridge Detection and Reinforcement Technology Ministry of Transport Beijing 10088 China National Engineering Laborary for Bridge Structure Safety Technology Beijing 10088 China

ISBN: (纸本)9783038350996

Main detection and monitoring technology of bridges construction concealment engineering were carried out investigation and analysis. The use of concealed engineering inspection technology, monitoring technology were overviewed and analyzed. The development status of detection, monitoring technology at present reviewed and analyzed. detection technology parameters on the internal prestress were compared. technology development trend and foreground detection of concealed engineering were presented. © (2014) Trans Tech Publications, Switzerland.

关键词： bridges

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Dynamic characteristics of arch steel tower in construction stages

Dynamic characteristics of arch steel tower in construction ...

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4th International Conference on Materials Science and Information technology, MSIT 2014

作者： Yu, Li Che, Yan Yang Wang, Sen Zhao, Guo Hui Key Laboratory of Ministry of Communications for Bridge Detection and Reinforcement Technology School of Highway Chang'an University Xi'an 710064 China

ISBN: (纸本)9783038351733

Based on Hangzhou Zhijiang bridge, FEA models of arch steel tower in construction and completed stages are established by using ANSYS software. Before closed and completed are considered to compute the dynamic characteristics of different structural system for arch steel tower. The results show that the wind-reduced vibration can be generated easily. It can cause some bad effect on the construction, equipments and the safety of staff. So, some proper measures should be adopted to decrease the wind-induced vibration of arch steel tower in construction and completed stages. So, some meaningful references are provided for the further research on control of wind-Induced vibration for arch steel tower. © (2014) Trans Tech Publications, Switzerland.

关键词： Cable stayed bridges

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Dynamic analysis and test validation for continuous girder bridge

Dynamic analysis and test validation for continuous girder b...

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4th International Conference on Civil Engineering, Architecture and Building Materials, CEABM 2014

作者： Yang, Ya Xun Liu, Peng Key Laboratory for Old Bridge Detection and Reinforcement Technology of Ministry of Transportation Chang'an University Xi'an 710064 Shaanxi China

ISBN: (纸本)9783038351672

With the rapid development of technology of bridge, bridge as an important part of the traffic network, the safety of its operations was getting more and more attention by people. In order to ensure the bridge can be safe and reliable operating, the newly built bridge testing had become a necessary measures. In this paper, a three span continuous box girder bridge (28+36+28m) was taken as an example, To analyze and calculate its dynamic characteristics, the finite element software MISAS was used. And it was verified through experiments. © (2014) Trans Tech Publications, Switzerland.

关键词： Finite element method

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Single beam load test of continuous beam

Single beam load test of continuous beam

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4th International Conference on Civil Engineering, Architecture and Building Materials, CEABM 2014

作者： Yang, Ya Xun Fan, Wei Ya Key Laboratory for Old Bridge Detection and Reinforcement Technology of Ministry of Transportation Chang'an University Xi'an 710064 Shaanxi China

ISBN: (纸本)9783038351641

GengYuHe bridge was a prestressed concrete continuous box girder bridge, based on the static load test of single beam bridges compared with theoretical calculation value, check whether the actual control section stress of the bridge are in conformity with the design requirements, and give advice. © (2014) Trans Tech Publications, Switzerland.

关键词： Box girder bridges

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Analysis on aerostatic stability for Jianghai direct ship channel bridge in finished stage

Analysis on aerostatic stability for Jianghai direct ship ch...

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4th International Conference on Materials Science and Information technology, MSIT 2014

作者： Yu, Li Wang, Sen Che, Yan Yang Zhao, Guo Hui Key Laboratory of Ministry of Communications for Bridge Detection and Reinforcement Technology School of Highway Chang'an University Xi'an 710064 China

ISBN: (纸本)9783038351733

Based on the wind tunnel experiment for aerostatic force of section model of Jianghai direct ship channel bridge of Hongkong-zhuhai-macau great bridge in its finished stage, one calculation program considering the geometric nonlinearity and aerostatic nonlinearity is prepared by using ANSYS parametric design language in order to calculate the nonlinear aerostatic response for long-span cable-stay bridges. Then, the FEA model of Jianghai direct ship channel bridge of Hongkong-zhuhai-macau great bridge in its finished stage is established to analyze the threedimensional nonlinear aerostatic stability. And the aerostatic response with different position of bridge is also calculated. The research result indicates that the aerostatic instability can not occur in Jianghai direct ship channel bridge of Hongkong-zhuhai-macau great bridge in its finished stage. And, the max torsion deformation, transverse and vertical displacements of finished stage occur in the mid-span of each span and decrease gradually near to both sides. © (2014) Trans Tech Publications, Switzerland.

关键词： Nonlinear analysis

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Research on lifetime remaining of bridge based on Gray theory

Research on lifetime remaining of bridge based on Gray theor...

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作者： Zhang, Ying Huang, Hai Xin Cheng, Shou Shan Library Hebei University of Technology Tianjin 300401 China School of Civil Engineering Hebei University of Technology Tianjin 300401 China Key Laboratory of Bridge Detection and Reinforcement Technology Ministry of Communications Beijing 100088 China

ISBN: (纸本)9783038351221

The method of predication is the key for evaluating lifetime remaining of existing bridge in bridge assessment. Improved Gray Model,which can supplement and make full use of new information in time,on the basis of Gray Theory is tried to be used here,and compared with traditional model by analysizing an engineering *** results show that the improved model can not only improve the precision of prediction,but also comply with the nature of dynamic property of bridge lifetime remaining,i.e.,as the latest inspection information updates the predication value. © (2014) Trans Tech Publications, Switzerland.

关键词： bridges

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