Experimental Study on the Dynamic Deformation of Simply Supported Beam in Chinese High-speed Railway

2018 ◽  
Author(s):  
Gonglian Dai ◽  
Meng Wang ◽  
Tianliang Zhao ◽  
Wenshuo Liu
Keyword(s):  
High Speed ◽  
Structure Design ◽  
Dynamic Coefficient ◽  
Bridge Structure ◽  
High Speed Railway ◽  
Simply Supported Beam ◽  
Vertical Stiffness ◽  
Simply Supported ◽  
Speed Up ◽  
Design Speed

<p>At present, Chinese high-speed railway operating mileage has exceeded 20 thousand km, and the proportion of the bridge is nearly 50%. Moreover, high-speed railway design speed is constantly improving. Therefore, controlling the deformation of the bridge structure strictly is particularly important to train speed-up as well as to ensure the smoothness of the line. This paper, based on the field test, shows the vertical and transverse absolute displacements of bridge structure by field collection. What’s more, resonance speed and dynamic coefficient of bridge were studied. The results show that: the horizontal and vertical stiffness of the bridge can meet the requirements of <b>Chinese “high-speed railway design specification” (HRDS)</b>, and the structure design can be optimized. However, the dynamic coefficient may be greater than the specification suggested value. And the simply supported beam with CRTSII ballastless track has second-order vertical resonance velocity 306km/h and third-order transverse resonance velocity 312km/h by test results, which are all coincide with the theoretical resonance velocity.</p>

Research on the Peaks of Elevated Box Bridge Structure Noise of High Speed Railway

ICRT 2017 ◽  
2018 ◽  
Author(s):  
Xiaoan Zhang ◽  
Guangtian Shi ◽  
Xiaoyun Zhang ◽  
Jianjin Yang ◽  
Lei Xu
Keyword(s):  
High Speed ◽  
Bridge Structure ◽  
High Speed Railway

Performance of Transportation Systems during the 2004 Niigata Ken Chuetsu, Japan, Earthquake

2006 ◽  
Vol 22 (1_suppl) ◽  
pp. 111-132 ◽  
Author(s):  
Scott A. Ashford ◽  
Yohsuke Kawamata
Keyword(s):  
High Speed ◽  
Ground Motions ◽  
Highway Bridges ◽  
Transportation Systems ◽  
Bridge Structure ◽  
Railway Transportation ◽  
High Speed Railway ◽  
Significant Damage ◽  
Emergency Vehicles ◽  
Epicentral Region

With the possible exception of the Shinkansen railway, transportation structures for the most part performed well in the Niigata Ken Chuetsu earthquake. There were no collapses. The damage appeared limited and repairable, indicating generally good performance despite the severe ground motions in the epicentral region. The reconnaissance team visited every bridge structure crossing the Uono and Shinano rivers in the epicentral region. All but two of the highway bridges inspected were open for at least limited traffic, and those two appeared to be open for emergency vehicles. Significant damage was observed on the Shinkansen high-speed railway, as well as on some local railway lines, but all appeared repairable. A historic first was the earthquake's derailment of a high-speed Shinkansen train.

Research on the Key Technology in Steam Curing for 32m Simple-Supported Box Girder of High-Speed Railway

2011 ◽  
Vol 90-93 ◽  
pp. 958-963
Author(s):  
Xue Min Li ◽  
Er Yu Zhu ◽  
Yong Zheng Zhou ◽  
Yue Hong Qin
Keyword(s):  
Temperature Control ◽  
High Speed ◽  
Production Efficiency ◽  
Temperature Control System ◽  
Box Girders ◽  
Steam Curing ◽  
Box Girder ◽  
High Speed Railway ◽  
Simply Supported ◽  
Steam System

In the process of steam curing to high-speed railway’s simply-supported box girder, there are some problems must be faced such as the difficulty to determine steam curing system and to achieve automatic temperature control. With the construction site conditions of simple-supported box girder in Longwang beam field which is located on Shijiazhuang-Wuhan (Shi-Wu) section of Beijing-Guangzhou high-speed railway, the paper proposes the appropriate steam system for simply-supported box girders, determines the appropriate equipments, explores the temperature control system in the process of steam curing to the simply-supported box girder's concrete, and takes the temperature test of steam curing in the field. Results show that, the steam curing technology in this paper can increase the production efficiency of beam in production site, and effectively guarantee the prefabricated quality of simply-supported box girder.

Simply supported prestressed concrete deck for high speed railway bridges

2003 ◽  
Vol 87 (11) ◽  
pp. 57-63
Author(s):  
Maja Della Vedova ◽  
Luigi Evangelista ◽  
Francesco Sacchi
Keyword(s):  
Prestressed Concrete ◽  
High Speed ◽  
High Speed Railway ◽  
Railway Bridges ◽  
Simply Supported ◽  
Concrete Deck

Creep Effects on Simply Supported Prestressed Concrete Box Girder of High-Speed Railway with Ballastless Tracks

2012 ◽  
Vol 238 ◽  
pp. 733-737 ◽  
Author(s):  
Wang Fang ◽  
Bing Han ◽  
Shao Kun Yang
Keyword(s):  
Prestressed Concrete ◽  
High Speed ◽  
Element Model ◽  
Dead Load ◽  
Box Girders ◽  
Box Girder ◽  
High Speed Railway ◽  
Simply Supported ◽  
Creep Models ◽  
Curing Age

Creep will lead to increasing deflection of prestressed concrete girder, which may induce rails uneven, especially to ballastless tracks in high-speed railways. In this paper, two creep models, CEB-FIP90 and ACI209, were used in a finite element model to analyze influences of creep on simply supported prestressed concrete box girders which are used in high-speed railway in China. Sensitivity analysis was carried on towards curing age, secondary dead load, loading time and prestressing method on deformation of the girder. The results show creep should be controlled in engineering to ensure driving security.

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