桥梁设计 第2部分：设计荷载

Australian Standard™

Bridge design

Part 2: Design loads

1

AS IS

内部资料

仅供参考

张忠辉惠存

禁止一切非法目的和活动行为，否则后果自负。

NOT FOR PUBLIC RELEASE

2

This Australian Standard was prepared by Committee BD-090, Bridge Design. It was approved on behalf of the Council of Standards Australia on 4 November 2003 and published on 23 April 2004.

The following are represented on Committee BD-090:

• Association of Consulting Engineers Australia
• Australasian Railway Association
• Austroads
• Bureau of Steel Manufacturers of Australia
• Cement and Concrete Association of Australia
• Institution of Engineers Australia
• Queensland University of Technology
• Steel Reinforcement Institute of Australia
• University of Western Sydney

Keeping Standards up-to-date

Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased.

Detailed information about Standards can be found by visiting the Standards Web Shop at www.standards.com.au and looking up the relevant Standard in the on-line catalogue.

Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Global Standard, has a full listing of revisions and amendments published each month.

Australian Standards^TM and other products and services developed by Standards Australia are published and distributed under contract by SAI Global, which operates the Standards Web Shop.

We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at mail@standards.org.au, or write to the Chief Executive, Standards Australia International Ltd, GPO Box 5420, Sydney, NSW 2001.

This Standard was issued in draft form for comment as DR 00375.

3

Australian Standard^TM

Bridge design

Part 2: Design loads

Originated as HB 77.2—1996.

Revised and redesignated as AS 5100.2—2004.

COPYRIGHT

© Standards Australia International

All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher.

Published by Standards Australia International Ltd
GPO Box 5420, Sydney, NSW 2001, Australia

ISBN 0 7337 5628 X

4

PREFACE

This Standard was prepared by the Standards Australia Committee BD-090, Bridge Design, to supersede HB 77.2—1996, Australian Bridge Design Code, Section 2: Design loads.

The AS 5100 series represents a revision of the 1996 HB 77 series, Australian Bridge Design Code, which contained a separate Railway Supplement to Sections 1 to 5, together with Section 6, Steel and composite construction, and Section 7, Rating. AS 5100 takes the requirements of the Railway Supplement and incorporates them into Parts 1 to 5 of the present series, to form integrated documents covering requirements for both road and rail bridges. In addition, technical material has been updated.

This Standard is also designated as AUROADS publication AP-G15.2/04.

The objectives of AS 5100 are to provide nationally acceptable requirements for—

(a) the design of road, rail, pedestrian and bicycle-path bridges;

(b) the specific application of concrete, steel and composite construction, which embody principles that may be applied to other materials in association with relevant Standards; and

(c) the assessment of the load capacity of existing bridges.

These requirements are based on the principles of structural mechanics and knowledge of material properties, for both the conceptual and detailed design, to achieve acceptable probabilities that the bridge or associated structure being designed will not become unfit for use during its design life.

Whereas earlier editions of the Australian Bridge Design Code were essentially administered by the infrastructure owners and applied to their own inventory, an increasing number of bridges are being built under the design-construct-operate principle and being handed over to the relevant statutory authority after several years of operation. This Standard includes Clauses intended to facilitate the specification to the designer of the functional requirements of the owner to ensure the long-term performance and serviceability of the structure.

Significant differences between this Standard and HB 77.2 are the following:

(i) Highway bridge design loads The design model for road traffic loads has been completely redefined to make provision for potential future increases in legal load limits. Not only does the design load reflect the projected increased loads but it has also been modified so that it more closely represents the full spectrum of vehicle configurations and traffic patterns. It no longer ‘looks like’ a semi-trailer but is purely a mathematical model. This new model incorporates both moving traffic loads and stationary traffic loads, and also incorporates the effects of special vehicles. The width of the design load, the standard design load and the standard design lane have been increased to 3.2 m, to reflect future loads and truck configurations. Provision has been made for the heavy load platform (HLP) design load, which may be specified by the relevant authority if required.

(ii) Dynamic load allowance The dynamic load allowance for railway bridges has been modified to incorporate the results of experience and investigations of fatigue in transom top steel railway bridges. The dynamic load allowance for road bridges has been adapted to reflect the recent changes in the Canadian Highway Bridge Design Code, modified to suit Australian conditions.

5

3

(iii) Bridge barriers The clauses for design loads of road bridge barriers have been updated to be consistent with performance level definition and selection specified in AS 5100.1. Many of the clauses are based on recently developed AASHTO* documentation, suitably modified to reflect local Australian conditions.

(v) Earthquake loading The earthquake loading clause has been updated to reflect the intent of AS 1170.4 as applicable to bridges.

In line with Standards Australia policy, the words ‘shall’ and ‘may’ are used consistently throughout this Standard to indicate, respectively, a mandatory provision and an acceptable or permissible alternative.

Statements expressed in mandatory terms in Notes to Tables are deemed to be requirements of this Standard.

The term ‘informative’ has been used in this Standard to define the application of the appendix to which it applies. An ‘informative’ appendix is only for information and guidance.

* American Association of State Highway and Transportation Officials

6