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>

Shear Assessment of Concrete Bridge Deck Slabs

2017 ◽  
Vol 738 ◽  
pp. 110-119 ◽  
Author(s):  
Radoslav Vida ◽  
Jaroslav Halvonik
Keyword(s):  
Current Model ◽  
Shear Capacity ◽  
Concrete Bridge ◽  
Current Standard ◽  
Concrete Members ◽  
Deck Slabs ◽  
Bridge Structures ◽  
Bridge Deck Slabs ◽  
Concrete Bridge Deck ◽  
New Generation

The transitions from old STN standards to Eurocode standards brought several problems into bridge design and assessment. Shear reinforcement is now often required even in concrete members, which were previously allowed to be built without it. Moreover, assessment of existing reinforced concrete bridge structures often shows their insufficiency in shear capacity, which means that they should be strengthened or replaced. Work on new generation of Eurocodes is currently in progress and current model for shear assessment should be replaced by a new (and more precise) one. This paper deals with the problem of shear assessment of concrete bridge according to current standard and also according to the new shear models that are under consideration.

Influence of changing environment conditions on the development of shrinkage strain and the expansion coefficient of large concrete specimens

2019 ◽  
Author(s):  
Dominik Suza ◽  
Johann Kollegger ◽  
Harald S. Müller
Keyword(s):  
Shrinkage Strain ◽  
Theoretical Models ◽  
Test Results ◽  
Current Standard ◽  
Operating Life ◽  
Changing Environment ◽  
Temperature And Humidity ◽  
Bridge Structures ◽  
Standard Models ◽  
Creep And Shrinkage

<p>The standard creep and shrinkage strain measurements of concrete are usually conducted in a laboratory with constant temperature and humidity with a low variation. The creep and shrinkage measurements are conducted over a few months with the expectation that small concrete specimens can sufficiently describe the evolution of the rheology effects on a large multi-span bridge in the course of its operating life.</p><p>The monitoring of real bridge structures shows the actual progression of the deflections and concrete strains. Unfortunately the evaluation and interpretation of the measured values is complicated. The idea of the scientific Creep &amp; Shrinkage project was to combine the two described situations (laboratory experiments and monitoring of real bridge structures) creating an experimental setup which would benefit from the advantages of both approaches.</p><p>In order to achieve conformity of the measured test results with those of theoretical models (MC 2010, EC) it was necessary to upgrade the current models to include the effects of changing temperature and humidity. Within this paper the upgrade of the current standard models to include changing environment conditions will be elaborated, in addition to an explanation of the method used to separate shrinkage strains from the temperature strains from the measured data. The measured concrete expansion coefficients will also be discussed.</p>

scholarly journals Commute as Ritual: Wellington Harbour Ferry Terminal

2021 ◽  
Author(s):  
◽  
Andrew R. Mitchener
Keyword(s):  
Conceptual Framework ◽  
Economic Value ◽  
Transport Infrastructure ◽  
Modern World ◽  
End User ◽  
A Value ◽  
Infrastructure Design ◽  
And Function ◽  
Block Sizes

<p>Transport infrastructure is the template upon which we build our inhabitations. Decisions regarding street arrangements, block sizes, and larger scale infrastructure design for example have an enduring and profound affect on the quality of our spatial environments. The conceptual framework we apply when generating and subsequently manipulating this template sets the parameters by which it is judged. By convention, transport infrastructure is considered a purely technical undertaking, within which designers rarely play any meaningful part. The spaces of mobility are thus from their very genesis conceived as instrumental in nature, judged as mere conduits whose function is to join meaningful places such as work and home, fulfilling an economic imperative. Recent research has shown however that affective, symbolic factors play a greater role than instrumental considerations in modal choice of commuters, suggesting that, to the end user at least, transport possesses a value beyond simple utility. Indeed, mobility itself is often cited as a defining characteristic of the modern world, implying a highly symbolic status. This gap between the instrumental conceptual framework we apply to transport infrastructure and the symbolically loaded experience of mobility is an opportunity for design to enrich the experience of users, framed in this research as commuters. Through investigation of the commute as a quotidian, secular ritual greater consideration is given to extra-economic value in the spaces of transport infrastructure. This research analyses the nature and function of ritual in contemporary secular life and argues for the applicability of a ritual framework for understanding value in transport infrastructure. The spatial implications of ritual (defined as symbol + action  and exhibiting the key sociocultural functions of mnemonic and liminality) are explored through the design of a harbour ferry terminal for Wellington.</p>

Consideration of the vertical load from a tsunami on bridge structures

2021 ◽  
pp. 86-92
Author(s):  
Anton D. Yakovlev
Keyword(s):  
Natural Disaster ◽  
Russian Federation ◽  
Computer Modelling ◽  
Significant Part ◽  
Transport Infrastructure ◽  
Bridge Structure ◽  
Vertical Load ◽  
Tsunami Waves ◽  
Bridge Structures ◽  
The Russian Federation

A significant part of the territory of the Russian Federation is exposed to various natural disasters. One of the most destructive are tsunami waves. At the same time, for the development of these territories, there is a need for the development of transport infrastructure, which implies, among other things, the design of bridges. To ensure the reliability of bridges in the event of tsunami, it is necessary to fully take into account the possible impacts from these waves. In Russia, there is a document to determine the load from the tsunami. But, despite the existence of this document, the issue of taking into account the loads from the tsunami on various structures remains relevant. In particular, there are no clear guidelines for accounting for vertical loads from tsunami waves on bridge structures. With the help of the studies carried out on computer modelling of the wave roll-up on the bridge structure, this article proves the need to take into account the vertical loads from the tsunami, and also proposes a method for determining its numerical values. This study can complement the basic methodology for determining the loads from tsunami waves on bridge structures and help designers fully account for this dangerous natural disaster.

Management of Bridge Structures – Challenges and Possibilities

2020 ◽  
Author(s):  
J. Bień ◽  
M. Salamak
Keyword(s):  
Integrated Management ◽  
Transport Infrastructure ◽  
Management Systems ◽  
Knowledge Based ◽  
Bridge Structures ◽  
Computer Based ◽  
Maintenance Systems ◽  
Infrastructure Improvement ◽  
Diagnostic Technologies ◽  
Monitoring Quality

<p>Bridges are particularly vulnerable elements of transport infrastructures. In many cases, bridge structures may be subject to higher volumes of traffic and higher loads as well as more severe environmental conditions than it was designed. Sound procedures to ensure monitoring, quality control, and preventive maintenance systems are therefore vital. The paper presents main challenges and arriving possibilities in management of bridge structures, including: relationships between environment and bridge infrastructure, improvement of diagnostic technologies, advanced modelling of bridges in computer-based management systems, development of knowledge-based expert systems with application of artificial intelligence, applications of technology of Bridge Information Modelling (BrIM) with augmented and virtual reality techniques. Presented activities are focused on monitoring the safety of bridges for lowering the risk of an unexpected collapse significantly as well as on efficient maintenance of bridges as components of transport infrastructure − by means of integrated management systems.</p>

scholarly journals Investigation of Critical Gap for Pedestrian Crossing Using Fuzzy Logic System

2020 ◽  
Vol 10 (10) ◽  
pp. 3653 ◽  
Author(s):  
Wafaa Shoukry Saleh ◽  
Maha M A Lashin
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic System ◽  
Transport Infrastructure ◽  
Membership Functions ◽  
Triangular Form ◽  
Critical Gap ◽  
Infrastructure Design ◽  
Input Variables ◽  
Pedestrian Crossing ◽  
Logic System

This paper assesses pedestrian crossing behavior and critical gaps at a two-way midblock crossing location. A critical gap is the shortest gap that a pedestrian accepts when crossing a road. A dataset was collected in 2017 in Edinburgh (UK). The analysis was performed using the fuzzy logic system. The adopted membership function of the fuzzy logic system is of a triangular form since it has a simple and convenient structure. The input variables that are used in the analysis are the number and length of rejected gaps and length of accepted gaps at the crossing location. The output variables are the critical gaps. The results show that assessing critical gap estimation of pedestrians crossing using fuzzy logic is achievable and produces reasonable values that are comparable to values that are reported in the literature. This outcome improves the understanding of pedestrian crossing behavior and could therefore have implications for transport infrastructure design. Further analysis using additional parameters including waiting time and demographic characteristics and alternative forms for membership functions are strongly encouraged.

Transposition and Implementation of EIA Directive in some EU Member States (with special emphasis on transport infrastructure cases)

elni Review ◽  
2007 ◽  
pp. 18-24
Author(s):  
Pavel Černý ◽  
Jerzy Jendrośka
Keyword(s):  
Environmental Impact ◽  
Public Participation ◽  
European Court Of Justice ◽  
Transport Infrastructure ◽  
Member States ◽  
Public And Private ◽  
Eu Member States ◽  
Court Of Justice ◽  
European Court ◽  
Large Scope

One of the main goals of the Directive 85/337/EEC, on the assessment of the effects of certain public and private projects on the environment (“EIA Directive”), expressed in its Preamble, is to ensure that projects that are likely to have significant environmental impact proceed only after prior assessment of their likely effect on the environment, based on appropriate information supplied by the developer and with proper avenues for public participation. The European Court of Justice (ECD) repeatedly narrowed down the (originally large) scope of discretion of the member states in deciding whether a project shall be subject to EIA or not by requiring the environmental impact assessment for any project which is likely to have serious impacts de facto. Central to this article is a description of the typical and most important gaps of implementation of the EIA directive, emerging from the specific traffic infrastructure cases. Prior to that, some general remarks on the typical characteristics and problems concerning transposition of the EIA Directive are made.

Methodological Basis of Infrastructural Project Implementation on Public and Private Partnership Foundation

10.12737/281 ◽  
2013 ◽  
Vol 2 (1) ◽  
pp. 0-0
Author(s):  
��������
Keyword(s):  
Project Management ◽  
Transport Infrastructure ◽  
Problem Solution ◽  
Main Task ◽  
Public And Private ◽  
Private Partnership ◽  
Railway Infrastructure ◽  
Infrastructure Project ◽  
Specific Factors ◽  
The Common

The main task of country economy modernizing aimed to improve its competitiveness and sustainability is the corresponding infrastructure creation. This problem solution is possible only through the joint efforts of state and private business. In this article the common and specific factors that affect the transport infrastructure project management are revealed on the basis of infrastructural project managing experience analysis, the principles of public-private partnership (PPP) as the format of such projects� realization are systematized and developed taking into account their characteristics. The offers directed on improvement of organizational and economic mechanism of infrastructural project management in the railway infrastructure sphere in the PPP model (the life-cycle contract) are developed.

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