scholarly journals Code provisions for confining steel in potential plastic hinge regions of columns in seismic design

1980 ◽  
Vol 13 (1) ◽  
pp. 60-70
Author(s):  
R. Park ◽  
M. J. N. Priestley
Keyword(s):  
New Zealand ◽  
Seismic Design ◽  
Plastic Hinge ◽  
Design Code ◽  
Seismic Codes ◽  
Code Provisions

A summary is given of the provisions for both circular and rectangular confining steel in potential plastic hinge zones of columns, as specified in the seismic codes of various countries. In particular, a comparison is made between New Zealand and overseas recommendations. The background to the confining steel provisions recommended in the draft SANZ Concrete Design Code is outlined.

scholarly journals The objective of the New Zealand seismic design code

1972 ◽  
Vol 5 (4) ◽  
pp. 113-127
Author(s):  
O. A. Glogau
Keyword(s):  
New Zealand ◽  
Seismic Design ◽  
Reference Point ◽  
Factual Information ◽  
Design Code ◽  
Seismic Design Code ◽  
Earthquake Performance

The writer discusses some aspects of the proposed revision of the New Zealand Seismic Design Code. The degree of sophistication of a code must be related to the accuracy of factual information available and the validity of assumptions that have to be made. The selected level of specified lateral code loading is related to a number of considerations some of which are not obvious on superficial examination of a proposal. Known earthquake performance whenever available must be the most important reference point for code writers.

A Critical Review of the Seismic Design Provisions for Ductile Shear Walls of the Canadian Code and Commentary

1975 ◽  
Vol 2 (4) ◽  
pp. 592-601 ◽  
Author(s):  
T. Paulay ◽  
S. M. Uzumeri
Keyword(s):  
Shear Stress ◽  
Seismic Design ◽  
Seismic Risk ◽  
Plastic Hinge ◽  
Shear Walls ◽  
Shear Wall ◽  
Risk Areas ◽  
The Relationship ◽  
Code Provisions

The 1975 Canadian Building Code for the design of reinforced concrete shear wall buildings in high seismic risk areas includes provisions that are new and significant. This paper critically examines some of these provisions, especially as they apply to cantilever shear walls. Clarifications in the definitions of curvature, member, and system ductilities are attempted. The relationship between curvature and system ductility is examined. Code provisions on allowable shear stress in the wall in the plastic hinge region and the provisions for the classification of the walls are discussed. Attention of the designer is drawn to some aspects of the code and the commentary that may result in structures of doubtful safety.

scholarly journals Comparison of recent New Zealand and United States seismic design provisions for reinforced concrete beam-column joints and test results from four units designed according to the New Zealand code

1983 ◽  
Vol 16 (1) ◽  
pp. 3-24 ◽  
Author(s):  
R. Park ◽  
J. R. Milburn
Keyword(s):  
United States ◽  
Reinforced Concrete ◽  
New Zealand ◽  
Seismic Design ◽  
Cyclic Load ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Test Results ◽  
Design Code ◽  
Load Tests

A comparison is made of the seismic design provisions for reinforced concrete beam-column joints required by the new New Zealand concrete design code NZS 3101 and recently proposed United States procedures. Large differences are shown to exist between these new provisions of the two countries. Results are reported
of cyclic load tests which were conducted according to the requirements of the new NZS 3101. The test results showed that location
of plastic hinges in beams away from the column faces may be of considerable advantage in the design of joints, when member sizes are small and joint shears are high, due to less congestion of reinforcement and better anchorage conditions.

scholarly journals Some possible revisions to the seismic provisions of the New Zealand concrete design code for moment resisting frames

1992 ◽  
Vol 25 (1) ◽  
pp. 37-43
Author(s):  
P. C. Cheung ◽  
T. Paulay ◽  
R. Park
Keyword(s):  
Reinforced Concrete ◽  
New Zealand ◽  
Plastic Hinge ◽  
Design Code ◽  
Concrete Frames ◽  
Rational Models ◽  
Moment Resisting Frames ◽  
Moment Resisting ◽  
Column Joint ◽  
Experimental And Theoretical Studies

Possible revisions to the seismic design provisions of the New Zealand concrete design code NZS 3101: 1982 for ductile reinforced concrete moment resisting frames are discussed. Topics include shear reinforcement for beam-column joint cores, anchorage of longitudinal reinforcement passing through beam-column joint cores, and transverse reinforcement in columns for confinement in potential plastic hinge regions of columns. The recommendations are based on recent experimental and theoretical studies of the simulated seismic response of beam-column joints and columns in ductile reinforced concrete frames. Rational models for the evaluation of behaviour are presented.

scholarly journals Review of code developments for earthquake resistant design of concrete structures in New Zealand

1981 ◽  
Vol 14 (4) ◽  
pp. 177-207
Author(s):  
R. Park
Keyword(s):  
New Zealand ◽  
Seismic Design ◽  
Research Work ◽  
Concrete Structures ◽  
Design Code ◽  
Design Procedures ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Bridge Structures ◽  
Structural Detailing

The development of codes for the earthquake resistant design of concrete structures in New Zealand since the 1931 Hawke's Bay-earthquake is traced. The background to the developments in the design procedures through the years is discussed. Californian seismic design codes, lessons from past earthquakes, and the results of analytical and experimental research work, much of it conducted
in New Zealand, have led to the current philosophy for seismic design in New Zealand as expressed by the 1976 SANZ loadings cods and the SANZ concrete design code about to be published. These codes state requirements for both adequate strength and ductility, and emphasize the importance of structural detailing to achieve satisfactory performance of structures during severe earthquake loading. This New Zealand seismic design philosophy for concrete building and bridge structures is reviewed. A summary of the seismic design provisions of the new SANZ concrete design code (NZS 3101) is given in an Appendix.

scholarly journals Seismic design of masonry structures to the new provisional New Zealand Standard NZS 4230p

1985 ◽  
Vol 18 (1) ◽  
pp. 1-20
Author(s):  
M. J. N. Priestley
Keyword(s):  
New Zealand ◽  
Seismic Design ◽  
Structural Design ◽  
Experimental Results ◽  
Masonry Structures ◽  
Design Code ◽  
Draft Code ◽  
Code Of Practice ◽  
Additional Information ◽  
Ductility Capacity

Background to seismic design aspects of the provisional New Zealand Code of Practice for Masonry Structural Design is given. Emphasis is given to reasons for differences in the provisional code from an earlier draft code. The changes include improved compatibility with the current Loadings Code NZS 4203 and the Concrete Design Code NZS 3101, provisions of simplified rules to ensure adequate ductility capacity, and additional information to provide guidance for ductile design of masonry frames. Some experimental results are presented to provide support for the provisions.

Evolution of seismic design codes of highway bridges in Chile

2021 ◽  
pp. 875529302098801
Author(s):  
José Wilches ◽  
Hernán Santa Maria ◽  
Roberto Leon ◽  
Rafael Riddell ◽  
Matías Hube ◽  
...  
Keyword(s):  
Seismic Design ◽  
Failure Modes ◽  
Highway Bridges ◽  
Design Codes ◽  
Seismic Codes ◽  
Analysis And Design ◽  
Residual Displacements ◽  
Shear Keys ◽  
Maule Earthquake ◽  
2010 Maule Earthquake

Chile, as a country with a long history of strong seismicity, has a record of both a constant upgrading of its seismic design codes and structural systems, particularly for bridges, as a result of major earthquakes. Recent earthquakes in Chile have produced extensive damage to highway bridges, such as deck collapses, large transverse residual displacements, yielding and failure of shear keys, and unseating of the main girders, demonstrating that bridges are highly vulnerable structures. Much of this damage can be attributed to construction problems and poor detailing guidelines in design codes. After the 2010 Maule earthquake, new structural design criteria were incorporated for the seismic design of bridges in Chile. The most significant change was that a site coefficient was included for the estimation of the seismic design forces in the shear keys, seismic bars, and diaphragms. This article first traces the historical development of earthquakes and construction systems in Chile to provide a context for the evolution of Chilean seismic codes. It then describes the seismic performance of highway bridges during the 2010 Maule earthquake, including the description of the main failure modes observed in bridges. Finally, this article provides a comparison of the Chilean bridge seismic code against the Japanese and United States codes, considering that these codes have a great influence on the seismic codes for Chilean bridges. The article demonstrates that bridge design and construction practices in Chile have evolved substantially in their requirements for the analysis and design of structural elements, such as in the definition of the seismic hazard to be considered, tending toward more conservative approaches in an effort to improve structural performance and reliability for Chilean bridges.

Research Situation on the Performance-Based Seismic Design Method for Reinforced Concrete Structure

2010 ◽  
Vol 163-167 ◽  
pp. 1757-1761
Author(s):  
Yong Le Qi ◽  
Xiao Lei Han ◽  
Xue Ping Peng ◽  
Yu Zhou ◽  
Sheng Yi Lin
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Design Method ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Seismic Evaluation ◽  
Seismic Codes ◽  
Performance Based Seismic Design ◽  
Capacity Calculation ◽  
Seismic Design Method

Various analytical approaches to performance-based seismic design are in development. Based on the current Chinese seismic codes，elastic capacity calculation under frequent earthquake and ductile details of seismic design shall be performed for whether seismic design of new buildings or seismic evaluation of existing buildings to satisfy the seismic fortification criterion “no damage under frequent earthquake, repairable under fortification earthquake, no collapse under severe earthquake”. However, for some special buildings which dissatisfy with the requirements of current building codes, elastic capacity calculation under frequent earthquake is obviously not enough. In this paper, the advanced performance-based seismic theory is introduced to solve the problems of seismic evaluation and strengthening for existing reinforced concrete structures, in which story drift ratio and deformation of components are used as performance targets. By combining the features of Chinese seismic codes, a set of performance-based seismic design method is established for reinforced concrete structures. Different calculation methods relevant to different seismic fortification criterions are adopted in the proposed method, which solve the problems of seismic evaluation for reinforced concrete structures.

scholarly journals Reconciling Architectural Design with Seismic Codes

Prostor ◽  
2021 ◽  
Vol 29 (1 (61)) ◽  
pp. 42-55
Author(s):  
Cengiz Özmen
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Cross Sections ◽  
Architectural Design ◽  
Residential Buildings ◽  
Shear Walls ◽  
Spatial Arrangement ◽  
Design Principles ◽  
Seismic Codes ◽  
Architectural Analysis

Seismic codes include strict requirements for the design and construction of mid-rise reinforced concrete residential buildings. These requirements call for the symmetric and regular arrangement of the structural system, increased cross-sections for columns, and the introduction of shear walls to counteract the effects of lateral seismic loads. It is challenging for architects to reconcile the demands of these codes with the spatial arrangement and commercial appeal of their designs. This study argues that such reconciliation is possible through an architectural analysis. First, the effectiveness of applying the seismic design principles required by the codes is demonstrated with the comparative analysis of two finite element models. Then three pairs of architectural models, representing the most common floor plan arrangements for such buildings in Turkey, are architecturally analyzed before and after the application of seismic design principles in terms of floor area and access to view. The results demonstrate that within the context defined by the methodology of this study, considerable seismic achievement can be achieved in mid-rise reinforced concrete residential buildings by the application of relatively few, basic design features by the architects.

Sign in / Sign up

Export Citation Format

Share Document