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The 32 m span box girder prestressing effect monitoring and creep camber control for Wuhan-Guangzhou

Song Jinxi

Strategic Study of CAE 2009, Volume 11, Issue 1,   Pages 60-66

Abstract: case for study, the online montoring and numerical analysis for 32 m concrete prestressed box girder prestressingand elastic camber effect in Wuhan-Guangzhou passenger express line was performed in the paper.The effect of monitoring and analysis, based on the engineering practice, the control measures of the

Keywords: Wuhan-Guangzhou passenger express line     32 m box girder     prestressing effect monitoring     creep camber    

Experimental monitoring of the strengthening construction of a segmental box girder bridge and fieldtesting of external prestressing tendons anchorage

Ali Fadhil NASER, Zonglin WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 308-320 doi: 10.1007/s11709-012-0140-3

Abstract: The objectives of this study are to monitor the construction process of the external prestressing tendonsa field load test to measure the strain and the deflection of the anchorage devices of the external prestressingThe monitoring process of the external prestressing tendons construction includes inspecting the cracksThe results of the monitoring process show that the measured values of the deformation, the elongationTherefore, there is no damage during the construction and the tensioning of the external prestressing

Keywords: prestressed concrete     box girder     monitoring     external tendons     strain     deflection    

Experimental research on the mechanical property of prestressing steel wire during and after heating

ZHENG Wenzhong, HU Qiong, ZHANG Haoyu

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 247-254 doi: 10.1007/s11709-007-0031-1

Abstract: The mechanical property of prestressing steel wire during and after heating is the key factor in theTensile experiment of 16 prestressing steel wires ( = 1770 N/mm, = 5 mm, low relaxation of stress) at

Assessment of bridge expansion joints using long-term displacement measurement under changing environmental conditions

Youliang DING, Aiqun LI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 374-380 doi: 10.1007/s11709-011-0122-x

Abstract: This paper addresses the problem of condition assessment of bridge expansion joints using long-term measurement data under changing environmental conditions. The effects of temperature, traffic loading and wind on the expansion joint displacements are analyzed and interpreted, which reveal that measured displacements are observed to increase with an increase in temperature and to decrease with increased traffic loading, while the correlation between displacement and wind speed is very weak. Two regression models are developed to simulate the varying displacements under the changes in temperature and traffic loadings. Based on these models, the effects of the environmental conditions are removed to obtain the normalized displacement. Statistical process control using mean value control charts is further used to detect damage to the bridge expansion joints. The results reveal that the proposed method had a good capability for detecting the damage-induced 1.0% variances of the annual changes in the expansion joint displacements.

Keywords: structural health monitoring     displacement     expansion joint     temperature effect     wind effect     traffic loading    

Non-invasive continuous blood pressure monitoring: a review of current applications

Elena Chung, Guo Chen, Brenton Alexander, Maxime Cannesson

Frontiers of Medicine 2013, Volume 7, Issue 1,   Pages 91-101 doi: 10.1007/s11684-013-0239-5

Abstract:

Blood pressure monitoring has come a long way from the initial observations made by Reverend HalesThere are none that deny the importance of monitoring perioperative blood pressure; however, the limitedability of the current prevalent technology (oscillometric blood pressure monitoring) to offer continuousInvasive monitoring is able to detect beat-to-beat blood pressure measurement, but the risks inherent, and especially the creation of those offering non-invasive but continuous blood pressure monitoring

Keywords: non-invasive blood pressure monitoring     continuous blood pressure monitoring     invasive blood pressure monitoring    

A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 10-22 doi: 10.1007/s11709-019-0547-1

Abstract: The effect of the presence or absence of grouting on the strength and ductility of the members is alsoAs anticipated, prestressing enhances the load-bearing capacity for the tensile members, whereas it is

Keywords: finite element     prestressing     tubular members     grout     high strength steel    

Continuous dynamic monitoring of a centenary iron bridge for structural modification assessment

Carmelo GENTILE,Antonella SAISI

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 1,   Pages 26-41 doi: 10.1007/s11709-014-0284-4

Abstract: A multi-channel continuous dynamic monitoring system has been installed in a centenary iron arch bridgeThe monitoring project follows a series of preliminary ambient vibration tests carried out on the bridgedynamic characteristics identified from the experimental studies developed since 2009, the installed monitoring

Keywords: automated modal identification     continuous dynamic monitoring     environmental/operational effects     iron archbridge     structural health monitoring    

Research on non-mechanical ventilation effect in Zhongnanshan road tunne

Zheng Xuan,Guo Jiaqi

Strategic Study of CAE 2010, Volume 12, Issue 3,   Pages 39-44

Abstract: scheme properly and save the ventilation expenditure, the evaluation of non-mechanical ventilation effectThrough analysis of the monitoring data, we draw some conclusions: firstly, bigger speed of the naturalwind orientation, frequency of wind orientation, the temperature of portal et al, approximates the monitoringwind speed induced by natural ventilation pressure and traffic wind force is a little smaller than the monitoring

Keywords: tunnel ventilation     field monitoring     non-mechanical ventilation     natural wind     traffic piston wind    

Investigation of mechanical performance of prestressed steel arch in tunnel

Yaqiong WANG, Yunxiao XIN, Yongli XIE, Jie LI, Zhifeng WANG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 360-367 doi: 10.1007/s11709-017-0429-3

Abstract: In the traditional tunneling method, the steel arch are often adopted to support surrounding rock to ensure the structural stability. If the steel arch is prestressed in time, tunnel support can effectively prevent the development of rock crack, thereby increasing the overall strength of tunnel support and suppress the deformation of the surrounding rock. Based on the mechanical model of steel arch established in this paper, the stress distribution of steel arch is investigated via the numerical simulation method, and the impact on surrounding rock is also analyzed. Through a field test, the rules of the arch strain distribution are observed and discussed. The results show that the prestressed steel arch structure can provide effective support and the stress gradually decreases from stress point to another arch springing. Furthermore, the stress distribution applied by the prestressed steel arch on the surrounding rock is uniform in a certain extent, and it is suggested that this construction method utilizing the prestressed steel arch to squeeze surrounding rock is feasible from a theoretical view.

Keywords: tunnel support     prestressing force     steel arch     numerical analysis    

Needs and challenges of optical atmospheric monitoring on the background of carbon neutrality in China

Frontiers of Environmental Science & Engineering 2024, Volume 18, Issue 6, doi: 10.1007/s11783-024-1833-2

Abstract:

● A system of environmental optical monitoring technology has been

Keywords: Pollution     Greenhouse gas     Optical atmospheric monitoring     Needs and challenges    

In-situ condition monitoring of reinforced concrete structures

Sanjeev Kumar VERMA,Sudhir Singh BHADAURIA,Saleem AKHTAR

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4,   Pages 420-437 doi: 10.1007/s11709-016-0336-z

Abstract: modeling of physical deterioration mechanisms, performance characteristics and parameters and condition monitoring

Keywords: concrete     carbonation     chloride     corrosion     monitoring     models    

Fatigue stress monitoring and analyses for steel box girder of Runyang Suspension Bridge

WANG Ying, LI Zhaoxia, WU Baijian

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3,   Pages 197-204 doi: 10.1007/s11709-008-0038-2

Abstract: The monitoring of fatigue stress of steel bridge is a key issue of bridge health monitoring and safetyThe results show that, monitoring on local strain in health monitoring systems of RYSB can effectivelyThe range of the equivalent fatigue stress on the monitoring location of the bridge is currently low,Effect of the passing of heavy trucks on bridge fatigue is quite significant since the value of the cumulativeTherefore, the effect on fatigue cumulative damage due to heavy trucks or overloaded vehicles needs to

Keywords: bridge     monitoring location     RYSB     traffic loading     information    

Structural health monitoring with fiber optic sensors

F. ANSARI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2,   Pages 103-110 doi: 10.1007/s11465-009-0032-y

Abstract: Civil structures pose further challenges in monitoring mainly due to their large dimensions, diversityThis article provides a summary of basic principles pertaining to practical health monitoring of civil

Keywords: Bridges     structural health monitoring     smart skins     cracks     strains     displacements     fiber optic sensors     FBG    

DEVELOPMENT OF AN AUTOMATIC WEIGHING PLATFORM FOR MONITORING BODYWEIGHT OF BROILER CHICKENS IN COMMERCIAL

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 3,   Pages 363-373 doi: 10.15302/J-FASE-2023510

Abstract:

● An automatic weighing system for monitoring bodyweight of broilers

Keywords: automatic weighing     weight monitoring     floor housing     uniformity     precision poultry farming    

RESEARCH AND APPLICATION OF CROP PEST MONITORING AND EARLY WARNING TECHNOLOGY IN CHINA

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 1,   Pages 19-36 doi: 10.15302/J-FASE-2021411

Abstract: Nevertheless, the use of science and technology in monitoring and early warning of major crop pests providesThis review summarizes the most fundamental information on pest monitoring and early warning in Chinaresearch and application, Chinese laws and regulations related to plant protection, and the National Monitoring

Keywords: China / law / early warning system and national crop pest monitoring / pest management / regulation and    

Title Author Date Type Operation

The 32 m span box girder prestressing effect monitoring and creep camber control for Wuhan-Guangzhou

Song Jinxi

Journal Article

Experimental monitoring of the strengthening construction of a segmental box girder bridge and fieldtesting of external prestressing tendons anchorage

Ali Fadhil NASER, Zonglin WANG

Journal Article

Experimental research on the mechanical property of prestressing steel wire during and after heating

ZHENG Wenzhong, HU Qiong, ZHANG Haoyu

Journal Article

Assessment of bridge expansion joints using long-term displacement measurement under changing environmental conditions

Youliang DING, Aiqun LI

Journal Article

Non-invasive continuous blood pressure monitoring: a review of current applications

Elena Chung, Guo Chen, Brenton Alexander, Maxime Cannesson

Journal Article

A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Journal Article

Continuous dynamic monitoring of a centenary iron bridge for structural modification assessment

Carmelo GENTILE,Antonella SAISI

Journal Article

Research on non-mechanical ventilation effect in Zhongnanshan road tunne

Zheng Xuan,Guo Jiaqi

Journal Article

Investigation of mechanical performance of prestressed steel arch in tunnel

Yaqiong WANG, Yunxiao XIN, Yongli XIE, Jie LI, Zhifeng WANG

Journal Article

Needs and challenges of optical atmospheric monitoring on the background of carbon neutrality in China

Journal Article

In-situ condition monitoring of reinforced concrete structures

Sanjeev Kumar VERMA,Sudhir Singh BHADAURIA,Saleem AKHTAR

Journal Article

Fatigue stress monitoring and analyses for steel box girder of Runyang Suspension Bridge

WANG Ying, LI Zhaoxia, WU Baijian

Journal Article

Structural health monitoring with fiber optic sensors

F. ANSARI

Journal Article

DEVELOPMENT OF AN AUTOMATIC WEIGHING PLATFORM FOR MONITORING BODYWEIGHT OF BROILER CHICKENS IN COMMERCIAL

Journal Article

RESEARCH AND APPLICATION OF CROP PEST MONITORING AND EARLY WARNING TECHNOLOGY IN CHINA

Journal Article