Structural Design Codes of Australia and New Zealand: Seismic Actions

Author(s):  
George P. Kouretzis ◽  
Mark J. Masia ◽  
Clive Allen
Author(s):  
I. J. Billings

The workshop was held in Tokyo immediately
 prior to 9th World Conference on Earthquake 
Engineering. Two previous workshops have
been held in 1984 and 1986 both with an 
emphasis on seismic building design and 
construction practices. New Zealand and
 China were invited to participate in the
 3rd Workshop which was attended by 17 U.S. 
and 23 Japanese representatives. I was
 privileged to attend the third workshop 
which was organised by the Japan Structural
 Consultants Association. 21 papers were
 presented covering building seismic analysis and design, and comparison of design codes and practices. The conference concluded with a working session which allowed a useful exchange of information. In the notes below I have summarized several items of particular interest to New Zealand practitioners.


The philosophies behind design codes with particular reference to the use of modern limit state design are presented in this chapter. Comments are made on the design life of temporary structures which vary considerably between different countries. Design codes of the USA, Europe and Australia/New Zealand for temporary structures are compared with particular reference to the loads combinations and the partial factors applied. It is noted that whilst the European design codes do not specify how construction, use and disassembly of the temporary structures are to be executed the USA code for scaffolding includes such specification. The Hong Kong code for bamboo scaffolds is described showing the similarities and differences between bamboo and metal scaffolds. The chapter concludes with design examples for selected temporary structures based on design codes.


Author(s):  
Richard Albert

Some constitutional amendments are not amendments at all. They are self-conscious efforts to repudiate the essential characteristics of the constitution and to destroy its foundations. They dismantle the basic structure of the constitution while at the same time building a new foundation rooted in principles contrary to the old. Changes on this scale are not properly called constitutional amendments. They are better understood as constitutional dismemberments. A constitutional dismemberment is incompatible with the existing framework of the constitution. It intends deliberately to disassemble one or more of the constitution’s elemental parts by altering a fundamental right, an important structural design, or a core aspect of the identity of the constitution. To use a rough shorthand, the purpose and effect of a constitutional dismemberment are the same: to unmake the constitution. But what, then, is a constitutional amendment? This chapter explains that there are four fundamental features to a constitutional amendment: its subject, authority, scope, and purpose. The most important feature of an amendment is its scope, which at all times must not exceed the boundaries of the existing constitution. This chapter therefore defines a constitutional amendment in terms of what it is and what it is not, with illustrations drawn from around the globe. This chapter considers constitutions from Barbados, Belize, Brazil, Canada, Dominica, Guyana, Ireland, Italy, Jamaica, Japan, New Zealand, and the United States.


2009 ◽  
Vol 49 (1) ◽  
pp. 269
Author(s):  
Rodney Pinna ◽  
Glynn Thomas ◽  
Michael Bieganski

The Maari DrillACE Well Head Platform (WHP) was installed offshore New Zealand during the second quarter of 2008 for the designated operator OMV New Zealand Ltd. The platform was engineered and designed by Arup and Clough. Clough was responsible for engineering, procurement, construction and installation activities on the project, with Arup undertaking the design of the primary steel structure, including the plated base, deck and tubular jacket. The Maari WHP was the third ACE platform and the second DrillACE platform to be installed. This paper considers a number of the unique features of the structural design of the Maari DrillACE platform that were encountered during this project as well as providing a background on the ACE platform concept.


1993 ◽  
Vol 20 (6) ◽  
pp. 1030-1036 ◽  
Author(s):  
Ian Smith ◽  
Gerret Springer

Experimental results and theoretical predictions for failure of timber beams with end notches, or cuts on the tension face, are discussed. The validity of Gustafsson's formula and the underlying assumptions are examined in the context of structural design codes. Attention is drawn to the arbitrary dependence of theoretical predictions on the load and geometric arrangement of specimens, and the method by which fracture energy is estimated. It is not intended at this stage to give a complete solution for the problem, but it is concluded to be premature to incorporate the proposed Eurocode 5 failure criterion for notched beams into the Canadian Standard CAN/CSA 086.1. Key words: timber, fracture, notched beam, design criterion.


2019 ◽  
Vol 12 (6) ◽  
pp. 1288-1304
Author(s):  
W. C. SANTIAGO ◽  
H. M. KROETZ ◽  
A. T. BECK

Abstract This paper presents a reliability-based calibration of partial safety factors for Brazilian codes used in the design of concrete structures. The work is based on reliability theory, which allows an explicit representation of the uncertainties involved in terms of resistances and loads. Regarding the resistances, this study considers beams with concrete of five classes (C20, C30, C40, C50 and C60), three ratios between base and effective depth (0.25, 0.50 and 0.75), three longitudinal reinforcement ratios (ρmin, 0.5% and ρmax) and three transverse reinforcement ratios ( A s s m i n, 5 . A s s m i n and A s s m a x). In terms of loads, this work considers seven ratios between live loads and permanent loads (qn/gn), and seven ratios between wind loads and permanent loads (wn/gn). The study also adopts a single value for the target reliability index (βtarget = 3.0). Results show that the optimized set of partial safety factors leads to more uniform reliability for different design situations and load combinations.


Sign in / Sign up

Export Citation Format

Share Document