P4001 - Seismic design of eccentrically braced frames - 2013
Design guidance for the seismic design of steel structures was first published in 1995 by the New Zealand Heavy Engineering Research Association within HERA Report R4-76. This new design guide provides updated guidance and seismic design procedures for eccentrically braced frames (EBF's), and supersedes those previously given in HERA Report R4-76.
This design guide has been written to provide structural engineers with detailed seismic design procedures for eccentrically braced frames which comply with the requirements of AS/NZS 1170.0, NZS 1170.5 and NZS 3404.
R4-147 Temperature distribution in typical composite slabs under standard temperature-time fire condition - Dec 2014
This report was prepared by Nandor Mago of the New Zealand Heavy Engineering Research Association (HERA), who was responsible for the finite element modelling/analyses (FEA). The FEA were performed as requested by Dr Stephen Hicks and Dr Charles Clifton (Associate Professor of Civil Engineering and Structures Group Leader from the University of Auckland).
A free download is avaiable
R4-133 - New Zealand steelwork corrosion and coatings guide - February 2011
The overall objective of this Coatings Guide is to provide the necessary guidance to allow an appropriate and cost-effective coatings system for structural steelwork to be selected and then specified in a generic manner. It is written to be used in conjunction with the standard AS/NZS 2312:2002, "Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings".
Appendix A Figures - Please note that the colour bands for Figures A1 and A2 are different to those for Figures A3 to A6
Corrections V1 have been made to this publication. To download a free copy of the corrections, click here
R4-145 - Finite element analysis of eccentrically braced frames with removable link
A structural design assessment of the active link has been developed by SCNZ and the current FEA work intends to answer item by item the questions raised in the Objectives.
The report should be read from two sets of results. The first set of results with the concrete Youngs modulus of 20.8GPa is valid up to about the 61 st loading cycle. Following this cycle cracking is expected in the slab, which is not captured by the FEA (details of it are described later). Therefore, the second numerical simulation is performed with a much softer slab with Youngs modulus of 3.56GPa these results are valid from about the 62 nd cycle to the end of cyclic loading applied in this study. The reason for the two sets of results is that the slab contributes to the shear strength of the EBF system by resisting shear in parallel with the active link. However, the lightly reinforced slab will crack in shear and develop a maximum shear resistance approximately 2x that predicted by NZS 3101 under severe earthquake deformation.
R4-142 - Eccentric Cleats in Compression and Columns in Moment-Resisting Systems - January 2009
This publication presents design guidance on two different types of connection. The first is the eccentric cleat in compression which is used in a range of braced frame applications, connecting the braces into the supporting frames. The design procedure covers connections using unstiffened plates and connections with one plate stiffened. The second type is the moment-resisting beam to column connection used in conventional rigid moment frames. These are the welded moment and the moment endplate connections. Design of the connectors and connection components to the beams of these connections is already covered by HERA Report R4-100. This report presents design of the column stiffeners and panel zone, including requirements introduced in NZS 3404 amendment 2.
Corrigendum 1 has been issued for this publicaition. To download a free copy of the corrections, click here
R4-126 - Fabricator Capacity Booklet - 2nd Edition - February 2007
The Steel Bridge Development Group was formed in mid-March 2004 with the aim of increasing the market share of steel in bridges. One of their first tasks has been to identify the barriers that the steel industry has to overcome to gain that increase, then to take steps to remove them. One of the main barriers has been a perception among some clients and specifiers of the absence of steel bridge fabricators in New Zealand, and this booklet addresses that issue, containing a directory of fabricators with the capability and interest to fabricate steel bridges. The first section contains a brief company profile of each fabricator; the second presents tables that cover their capabililty and related facilities.
R4-139 - Steel Structures Seminar: Earthquake, Wind and Fire - May 2006
R4-134 - Semi-rigid joints for moment-resisting steel framed seismic-resisting systems - June 2005
Describes the development of new semi-rigid joints for moment-resisting steel framed (MRSF) seismic-resisting systems. Intended as the weak link in the seismic-resisting system, in accordance with a strong column, weak joint philosophy, the joints and systems were designed and detailed to withstand the design level ultimate limit state (500 year return period) earthquake with minimum damage. To meet economic criteria, the joints and systems were also required to be cost-effective to design, fabricate and construct when compared with conventional MRSFs. Design procedures and detailing requirements are presented along with details of testing.
R4-97 - New Zealand Weathering Steel Guide for Bridges - February 2005
The purpose of this publication is to provide the necessary guidance to ensure that dependable performance is realised for applications of weathering steel in New Zealand bridges. It covers aspects for designing, construction, inspection, maintenance and even rehabilitation of weathering steel, should corrosion rates exceed those anticipated at the design stage, as well as the limitations on the use of weathering steel.
Amendments have now been made to this publication. Click here for a copy of the amendments and ensure they are included in the appropriate sections.
R4-107 - Composite Floor Construction Handbook - February 2005
It is important that all parties involved in the design and construction of composite floor systems know how these floor systems behave during and after placement of the concrete and how to achieve a satisfactory outcome in terms of quality and accuracy of construction. This publication aims to provide that information, addressing the following three general topics: design of composite construction, construction aspects of composite construction, and inspection of composite construction.
R4-106 Code of practice for structural steelwork documentation 2002
THIS PUBLICATION HAS BEEN SUPERSEDED BY SteelDoc: Code of Practice for Structural Steelwork Documentation
The purpose of the publication is to clearly identify what Contract Documents, in particular the Drawings, should contain to get good value out of steel construction in New Zealand
R4-121 - Acoustic Guide - September 2004
The purposes of this Acoustic Guide are to: promote confidence in steel construction systems; raise the level of acoustic understanding in the building industry; address any perception that steel has performance limitations in acoustically demanding situations; provide the layman with a feel for the performance of different constructions; and provide recommendations which are simple, effective and inexpensive for 'best practice' acoustic design for commonly used building elements.
R4-123 - Wind Tunnel Study of Crosswind Force Spectra for Low Aspect Ratio Buildings - June 2004
This study is intended to improve the design of medium-rise buildings by providing better information for calculating the dynamic wind motion of low aspect ratio buildings. The wind loading code currently has cross-wind force spectra, used to calculate the dynamic wind loading, for slender buildings of aspect rations between 9:1:1 (height:width:depth) and 3:1:1. This study extends the range of aspect ratios for which cross-wind force spectra are available down to 2:1:1. Therefore designers will be better able to assess the dynamic wind motion of low aspect ratio designs, which are typical of medium-rise buildings presently being constructed in New Zealand.
R4-130 - Seminar Notes –Steel Bridges for New Zealand - November 2004
This seminar will present to bridge design engineers, contractors and specifiers a comprehensive overview of the benefits of steel bridges and the key considerations necessary to achieve an efficient and effective design solution.
R4-111 - Notes Prepared for a Seminar on Designing Stainless Steel Structures - February 2002
The aim of this seminar was to provide attendees with a practical yet comprehensive entry into the standard AS/NZS 4673:2001
R4-113 - Notes Prepared for a Seminar on Composite Design and Construction - May 2002
Composite floors comprise a range of concrete slab options supported on steel beams. This seminar presents information for obtaining the best solution from composite floor systems
R4-104 - Notes Prepared for the Tubular Structures Seminar - February 2001
The seminar introduces the design concepts, guidelines and standards for tubular structures.
R4-105 - Notes Prepared for a Seminar on Multi-Storey Steel Framed Buildings for Severe Fires - March 2001 (Revised June 2001)
The seminar presented details on the landmark Cardington fire tests, the behaviour and design of multi-storey steel framed buildings for inelastic response in severe fires, and general application of FED to steel buildings.
R4-101 - Notes Prepared for a Seminar on the Steel Structures Standard NZS 3404:1997 - February 1999
The aim of the seminar was to provide attendees with a practical, simple yet comprehensive entry into NZS 3404:1997
R4-99 - Specification for the Fabrication, Erection and Surface Treatment of Structural Steelwork - September 1998
The aim of this specification is to facilitate the cost-effective fabrication, erection and surface treatment of structural steelwork to the satisfaction of the client.
Purchase as a hardcopy or download pdf.
R4-92 - Restraint Classification for Beam Member Moment Capacity Determination to NZS 3404:1997- July 1997
R4-83 - Fire Models for Large Firecells - March 1996
This report contains two fire growth models. One is for open plan firecells and the second for firecells, or for areas within a firecell, that are separated by full height partitions.
R4-91 - Notes Prepared for a Seminar on Design of Steel Buildings for Fire Emergency Conditions - November 1996
This short seminar aims to enhance designers' understanding of the fire safety design requirements for steel buildings under the new BCS.
R4-82 - Calculation of Design Fire Resistance of Composite Concrete Slabs with Profiled Steel Sheet Under Fire Conditions - November 1994
This report outlines a method for calculating the design fire resistance of a composite slab in order to meet a specified FRR.
R4-58 - Manual of Standard Connection Details for Structural Steelwork Second Edition - April 1990
Recommended standard connection details for virtually all types of connections that a designer is likely to encounter in structural steelwork design are presented
R4-60 - Notes Prepared for a Seminar on Stressed Skin Diaphragm Design and Construction - May 1990
This seminar brings together and presents both the basic design procedure and all the developments in the area of new fastener technology.
R4-80 - Structural Steelwork Limit State Design Guides Vol. 1
R4-76 - Seismic Design Procedures for Steel Structures
This report has been reviewed and presents detailed procedures for the seismic design of steel structures in New Zealand and covers MBFs, CBFs.
A Corrigendum has been produced reflecting the changes made. Download a free copy of the corrigendum here
For information on EBFs, refer to new HERA Publication P4001:2013 Seismic Design of eccentrically Braced Frames
FaST Fire and Steel
R4-146 Investigating the Performance of the Weathering Steel Components of SH1 Mercer to Longswamp Off-ramp
The NZ Heavy Engineering Research Association (HERA) requested that an updated of our 20o1 report on performance of the weathering steel on this structure be undertaken with set tasks to be completed.
This report presents the methodology used and results of the investigation on the performance of the weathering steel components used in the Mercer to Longswamp Off-ramp structure.
A downloadable copy is available here