Research on Construction Informatization of Railway Steel Bridge Based on BIM in China

2019 ◽  
Author(s):  
Xiaoguang Liu ◽  
Yongjie Pan ◽  
Xinxin Zhao
Keyword(s):  
High Speed ◽  
Intelligent Manufacturing ◽  
Steel Bridges ◽  
Future Application ◽  
Significant Feature ◽  
Steel Bridge ◽  
Bridge Construction ◽  
Railway Bridges ◽  
Virtual Reconstruction ◽  
The Internet Of Things

<p>The construction informatization of railway bridges is becoming a significant feature of “intelligent manufacturing" in China's high speed railway (HSR). In order to explore the implementation of “Internet plus steel bridge construction" and further improve the quality and efficiency of construction, digitization and informatization of steel bridge construction have been studied. The overall framework of digital construction of railway steel bridge construction based on the internet of things (IoT) and BIM technology is proposed after analyzing the key process of quality control during the construction of railway steel bridge. And then the virtual reconstruction of railway steel bridge is presented based on the advanced digital technology. Taking the pre-assembly in fabrication stage and the bolted connection in erection stage of steel bridges as two representative examples, the virtual reconstruction information system has been developed and tested in some HSR railway bridge projects in China, which verifies the feasibility and efficiency of digital control virtual reconstruction strategy. The research is meaningful to the future application and development in intelligent construction of railway steel bridges.</p>

Study on Influences of Thickness of Flange of U Rib on Mechanical Behaviors of Orthotropic Monolithic Steel Bridge Deck System

2010 ◽  
Vol 163-167 ◽  
pp. 122-126 ◽  
Author(s):  
Ru Deng Luo ◽  
Mei Xin Ye ◽  
Ye Zhi Zhang
Keyword(s):  
Finite Element Analysis ◽  
Yangtze River ◽  
High Speed ◽  
Bridge Deck ◽  
Steel Bridges ◽  
Engineering Practice ◽  
Steel Bridge ◽  
Mechanical Behaviors ◽  
Element Analysis ◽  
High Speed Railway

Orthotropic monolithic steel bridge deck system stiffened by U rib is very fit for high-speed railway steel bridges because of its excellent mechanical behaviors. Thickness of flange is a very important parameter of U rib and has influence on mechanical behaviors of orthotropic monolithic steel bridge deck system. Based on the engineering practice of Anqing Yangtze River Railway Grand Bridge, the kind and the extents of influences of thickness of flange of U rib on mechanical behaviors of orthotropic monolithic steel bridge deck system are studied with finite element analysis. The results show that thickness of flange of U rib has relative large positive influences on rigidity, strength and stability of orthotropic monolithic steel bridge deck system. 14~18mm is the appropriate range of thickness of flange of U rib for high-speed railway steel bridges.

Local Stress Analysis of Orthotropic Steel Bridge Decks in High-Speed Railway

2011 ◽  
Vol 243-249 ◽  
pp. 1659-1663
Author(s):  
Yun Sheng Li ◽  
Yang Tian ◽  
Yan Ling Zhang
Keyword(s):  
High Speed ◽  
Maximum Stress ◽  
Bridge Deck ◽  
Local Stress ◽  
Element Model ◽  
Live Load ◽  
Steel Bridge ◽  
High Speed Railway ◽  
Railway Bridges ◽  
Orthotropic Steel Bridge Deck

Orthotropic decks are commonly used in high-speed railway bridges. Finite-element model is established by ANSYS for orthotropic steel bridge deck in this paper. Taking the standard PDL ZK live load as the train load, the local stress of the rib-to-deck joint, the rib-to-crossbeam joint, and the cut-outs of the crossbeam are analyzed respectively. Analysis results show that the stress concentration of bridge deck mainly appears at the intersecting part of the U-shaped rib, crossbeam, and bridge deck. In the whole bridge deck, the local stress level of the cut-outs in crossbeam is almost the highest, and the cut-outs is distorted seriously; the maximum stress of crossbeam cut-outs is mainly concentrated at the lower arc of the cut-outs, which is one of the positions prone to fatigue failure.

The Corrosion Prevention Research of Long-Span Non-Uniform Continuous Steel Bridges

2013 ◽  
Vol 361-363 ◽  
pp. 1129-1132
Author(s):  
Zi Lin Li ◽  
Hong Yi Ding ◽  
Yi Du ◽  
Jiang Xue
Keyword(s):  
Mechanical Properties ◽  
Corrosion Protection ◽  
Reference Value ◽  
Steel Bridges ◽  
Prevention Research ◽  
Steel Bridge ◽  
Corrosion Prevention ◽  
Bridge Construction ◽  
Long Span ◽  
Improvement Measures

As its good mechanical properties, steel bridge has been widely used in modern highway, railway and urban bridge construction, but its corrosion protection is also a major issue. This paper studies the types of corrosion, the methods of anti-corrosion and focuses on coating protection--the most promising anti-corrosion method currently. It proposes some improvement measures for the corrosion protection, and has a certain reference value for the design and construction of such bridges.

Problems Connected with the Application of Lamella Flanges in Steel Bridge Construction

2015 ◽  
Vol 769 ◽  
pp. 13-18
Author(s):  
Vladimir Kristek ◽  
Jaromir Kunrt ◽  
Miroslav Skaloud ◽  
Shota Urushadze
Keyword(s):  
Steel Bridges ◽  
Cumulative Damage ◽  
The Other ◽  
Steel Bridge ◽  
Bridge Construction ◽  
Simple Assumption ◽  
Bridge Structures ◽  
Damage Process ◽  
Perfect Contact ◽  
Pure Compression

Lamella flanges (Fig. 1) have lately grown popular with the designers of steel bridges –in their belief that these flanges provide us with the possibility of avoiding very thick flange plates in steel bridge structures. This belief is based on the assumption that the lamellas are perfectly plane and, therefore, in perfect contact everywhere, so that the loading from one lamella is transmitted into the other via pure compression, and that the perfect interaction of both lamellas is materialized by means of boundary fillet welds connecting both of the two lamellas. This simple assumption is, however, far from reality: it is not in the means of steel fabricators, not even in the means of those which are very progressively equipped, to produce perfectly plane flange lamellas. Then both lamellas exhibit unavoidable initial curvatures, which in combination form a gap between the lamellas, and consequently the directly loaded lamella is pressed into this gap. As the loading acting on every bridge is many times repeated, the aforesaid phenomenon is also many times repeated, (we can say that the lamellas „breathe“), and then an unavoidable cumulative damage process in the lamellas comes to being.

Numerical Model Updating Technique for Estimating Load Carrying Capacities of High Speed Railway Bridges

2016 ◽  
Vol 106 (8) ◽  
pp. 490-497
Author(s):  
Dong-Uk PARK ◽  
Jae-Bong KIM ◽  
Nam-Sik KIM ◽  
Sung-Il KIM
Keyword(s):  
Numerical Model ◽  
High Speed ◽  
Model Updating ◽  
High Speed Railway ◽  
Railway Bridges ◽  
Load Carrying

scholarly journals Numerical and Experimental Investigations on Vocal Fold Approximation in Healthy and Simulated Unilateral Vocal Fold Paralysis

2021 ◽  
Vol 11 (4) ◽  
pp. 1817
Author(s):  
Zheng Li ◽  
Azure Wilson ◽  
Lea Sayce ◽  
Amit Avhad ◽  
Bernard Rousseau ◽  
...  
Keyword(s):  
Computational Model ◽  
Vocal Fold ◽  
High Speed ◽  
Computational Models ◽  
Ex Vivo ◽  
Vocal Fold Paralysis ◽  
Future Application ◽  
Experimental Investigations ◽  
Type I ◽  
Mri Scans

We have developed a novel surgical/computational model for the investigation of unilat-eral vocal fold paralysis (UVFP) which will be used to inform future in silico approaches to improve surgical outcomes in type I thyroplasty. Healthy phonation (HP) was achieved using cricothyroid suture approximation on both sides of the larynx to generate symmetrical vocal fold closure. Following high-speed videoendoscopy (HSV) capture, sutures on the right side of the larynx were removed, partially releasing tension unilaterally and generating asymmetric vocal fold closure characteristic of UVFP (sUVFP condition). HSV revealed symmetric vibration in HP, while in sUVFP the sutured side demonstrated a higher frequency (10–11%). For the computational model, ex vivo magnetic resonance imaging (MRI) scans were captured at three configurations: non-approximated (NA), HP, and sUVFP. A finite-element method (FEM) model was built, in which cartilage displacements from the MRI images were used to prescribe the adduction, and the vocal fold deformation was simulated before the eigenmode calculation. The results showed that the frequency comparison between the two sides was consistent with observations from HSV. This alignment between the surgical and computational models supports the future application of these methods for the investigation of treatment for UVFP.

Design of High-Speed Railway Bridges with Earthquakes in the United States

2018 ◽  
Vol 29 (1) ◽  
pp. 18-25 ◽  
Author(s):  
Yinghong Cao ◽  
Todd Ude ◽  
Daniel Getter ◽  
Brendan Gill
Keyword(s):  
United States ◽  
High Speed ◽  
The United States ◽  
High Speed Railway ◽  
Railway Bridges

scholarly journals Existing Steel Railway Bridges Evaluation

2016 ◽  
Vol 12 (2) ◽  
pp. 103-110 ◽  
Author(s):  
Josef Vičan ◽  
Jozef Gocál ◽  
Jaroslav Odrobiňák ◽  
Peter Koteš
Keyword(s):  
Carrying Capacity ◽  
Global Analysis ◽  
Evaluation Process ◽  
Steel Bridge ◽  
Load Carrying Capacity ◽  
Railway Bridges ◽  
Load Carrying ◽  
Bridge Superstructure ◽  
Existing Bridges ◽  
Capacity Determination

Abstract The article describes general principles and basis of evaluation of existing railway bridges based on the concept of load-carrying capacity determination. Compared to the design of a new bridge, the modified reliability level for existing bridges evaluation should be considered due to implementation of the additional data related to bridge condition and behaviour obtained from regular inspections. Based on those data respecting the bridge remaining lifetime, a modification of partial safety factors for actions and materials could be respected in the bridge evaluation process. A great attention is also paid to the specific problems of determination of load-caring capacity of steel railway bridges in service. Recommendation for global analysis and methodology for existing steel bridge superstructure load-carrying capacity determination are described too.

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