scholarly journals Comparison of the Behavior of PSC Bridges According to Design Train Load before and after Revision of Railway Bridge Design Standard

2018 ◽  
Vol 18 (3) ◽  
pp. 45-50
Author(s):  
Joo Ha Lee ◽  
Jung Sun Park ◽  
Kwang Mo Lim
Keyword(s):  
Railway Bridge ◽  
Bridge Design ◽  
Design Standard ◽  
Before And After

scholarly journals INFLUENCE OF CURVED WEB CLOSED STEEL SECTIONS IN BRIDGE DESIGN

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Gilles Van Staen ◽  
Hans De Backer ◽  
Philippe Van Bogaert
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Urban Area ◽  
Element Model ◽  
Structural Elements ◽  
Railway Bridge ◽  
Bridge Design ◽  
Steel Sections ◽  
Steel Panels ◽  
Closed Steel

A bridge is nowadays more than a structure that connects people over an obstacle. When a bridge has to be built in an urban area, either it has to be a landmark or it should blend away in the environment. The use of curved steel panels is one option to obtain these requirements. However, due to a lack of knowledge, engineers end up with a conservative design to implement these structural elements. For that reason, a Finite Element Model is made of a railway bridge, where the outer webs of the main girders have a varying web curvature. Six different models are made and compared. The most important parameters that are compared are the deformations and the stresses in the webs. The study finds that curved webs have an equal or even better behavior than flat webs, even with smaller web thickness. This makes that designers can use curved webs in their design, without needing extra steel to make their design safe.

Research on Dynamic Load and Static Load Combination Effects on the Railway Bridge and Piers Impact

2013 ◽  
Vol 385-386 ◽  
pp. 367-371
Author(s):  
Yi Xiu Shen ◽  
Gao Feng Ren
Keyword(s):  
Network Architecture ◽  
Static Load ◽  
Bridge Piers ◽  
Lateral Stiffness ◽  
Railway Bridge ◽  
Vertical Stiffness ◽  
Load Combination ◽  
Before And After ◽  
Vibration Impact ◽  
Settlement Monitoring

Using modal analysis to train and bridges and piers for dynamics analysis, we got a theoretical solution. Using wireless sensor network architecture monitoring system for Bridges and piers of the acceleration and the settlement monitoring, in considering static load loading situation, through contrast train before and after the settlement of piers the quantity change and Bridges and piers acceleration size, draw piers vertical stiffness of the bridge vibration impact is not significant. Study of the bridge piers and transverse vibration characteristics, it is concluded that the piers lateral stiffness is far less than that of the vertical stiffness, piers and bridges in transverse have larger dynamic response to produce.

Effect of Overloaded Heavy Vehicles on Pavement and Bridge Design

1996 ◽  
Vol 1539 (1) ◽  
pp. 58-65 ◽  
Author(s):  
Chia-pei J. Chou
Keyword(s):  
Data Collection ◽  
Large Scale ◽  
Bridge Deck ◽  
Load Factor ◽  
Heavy Vehicles ◽  
Bridge Design ◽  
Original Design ◽  
Standard Specification ◽  
Design Standard ◽  
Truck Load

A large number of infrastructure projects have been undertaken in Taiwan in recent years because it is a developing country. These large-scale constructions have caused rapid growth in the number of heavy vehicles in service, as well as a dramatic increase in the size and weight of heavy vehicles. A very serious truck overloading problem has resulted, which significantly affects pavement performance and bridge safety. In the described study, weigh-in-motion (WIM) equipment was introduced to Taiwan's freeway systems. After data collection and analysis it was found that the average truck load factor for combined heavy vehicles computed from the WIM data collection was 2.7 times higher than the original design value, which already took into account 30 percent truck overloading. It was also found that computed axle load ratios for various types of heavy vehicles were dramatically different from the ratios given in the bridge design standard specification. Bridge deck designs for a simply supported bridge were studied. It was concluded that the current bridge design standard specification will result in a 28 percent underestimation of steel volume in bridge deck design.

Proposal to transform “AS(AS/NZS) 5100 Bridge Design Standard” to “AS/NZS 5100 Bridge and Transport Infrastructure Design Standard”

2021 ◽  
Author(s):  
Ross Pritchard
Keyword(s):  
Transport Infrastructure ◽  
Bridge Design ◽  
Current Standard ◽  
Noise Barriers ◽  
Public And Private ◽  
Name Change ◽  
Design Standard ◽  
Infrastructure Design ◽  
Bridge Structures ◽  
Heavy Rail

<p>The 2017 AS(AS/NZS) 5100 <i>Bridge Design </i>Series is an evolution of former road authority and (heavy) rail authority standards that can trace their initial roots to 1960s. Originally written in an era when all bridges were owned by public organizations. The 21st century has both public and private ownership of bridges. The scope of transport infrastructure has also expanded and now includes managed motorway gantries, noise barriers and large sign structures</p><p>This paper has identified an inconsistent approach to scope. It proposes a new wider scope of transport infrastructures to be included in the standard. This consistency in approach will remove inconsistent treatment of non-bridge structures relating to fatigue and load combinations in the current standard. The paper has also identified that high frequency metropolitan trains has resulted in fatigue cycles being grossly underestimated.</p><p>The paper proposes a name change from bridge to transport infrastructure design to fully capture the scope of the changes.</p>

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