News

17

Apr

2015

On Saturday, April 11, 2015, over 1500 dazzling guests convened at San Francisco City Hall in San Francisco, California, to commemorate the 40th anniversary of Computers and Structures, Inc. City Hall’s Rotunda was transformed into a glittering Emerald City, and guests had their photos taken with body-painted superheroes and Hollywood icons. Live entertainment featured breakdancing characters from the Wizard of Oz, live singing, and incredible choreographed musical numbers. Guests, among whom were prominent members of the structural engineering profession, professors, researchers, civic leaders, and others who travelled from all over the world, danced and dined until midnight. The sparkling celebration, featuring a Hollywood theme, was the culmination of CSI's international dealer conference, which was held at the Marriott Union Square and was attended by CSI software channel partners from around the globe.

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16

Mar

2015

Performance Based Design (PBD) is a major shift from traditional structural design concepts and represents the future of earthquake engineering. These new procedures help assure that the design will reliably meet a desired level of performance during a given earthquake. The fundamental component of PBD is nonlinear dynamic analysis where an attempt is made to capture the real behavior of the structure by explicitly modeling and evaluating post-yield ductility and energy dissipation when subjected to actual earthquake ground motions.

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23

Feb

2015

Performance Based Seismic Design Performance based design (PBD) updated to ASCE 41-13 
Nonlinear static and nonlinear dynamic procedures 
 Nonlinear hinges in frames and BRB 
 Nonlinear hinges in shear walls 
Automated Buckling Restrained Brace (BRB) modeling (Star Seismic) 
 Several new hysteresis options for nonlinear hinges 
Bilinear Maxwell oil damper property 
 Friction-spring hysteretic damper property 
 Fast Nonlinear Analysis (FNA) implemented for nonlinear hinges Quasi-static (Dynamic) option for Static Pushover analysis 
 D/C ratio plots and tables for PBD 
 Output averaging over several time history runs 
 GUI 
 Fast DirectX graphics with full display, drafting and selection capability 
Customization of toolbar and shortcut keys 
 Analysis Modeling 
Spectral matching of time history functions 
 Multiple mass sources for nonlinear analysis 
 Mass source may include the effect of mass eccentricity in diaphragms 
 Modification of geometry by mode shapes for imperfection analysis 
 Automated Response Spectrum Functions 
 Automated Response-Spectrum functions for Argentina, Chile, Colombia, Ecuador, Guatemala, Mexico, Peru, Dominican Republic, Venezuela and Korea Frame Design Enhanced User’s Interface for composite beam design American ACI 318-14 design code for concrete frame design Canadian CSA A23.3-14 design code for concrete frame design Canadian CSA S16-14 design code for steel frame design Canadian CSA S16-14 design code for composite frame design Korean KBC 2009 design code for concrete frame design Korean KBC 2009 design code for steel frame design 
 Wall Design American ACI 318-14 design code for shear wall design Canadian CSA A23.3-14 design code shear wall design Korean KBC 2009 design code shear wall design 
 Open Application Programming Interface (OAPI) 
 Additional API support for design data and results

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22

Dec

2014

Significant enhancements included in ETABS 2013 v13.2.0, v13.2.1, and v13.2.2:
The Auto-Relabel All option that was available in ETABS v9 has been restored.
Russian material property and section property libraries have been added.
ASCE 41-13 guidelines for performance-based design have been implemented for frame hinge definitions, performance-point calculations, and the behavior and acceptance criteria for panel-zones and BRBs (buckling-restrained braces).
Masonry is now defined as a separate material rather than a type of concrete material.
Multiple named mass-source definitions can now be created and used for different load cases.
The Singapore National Annex has been added as an option to the Eurocode 8-2004 response spectrum function.
Notional load patterns can now be based on snow loads as well as other gravity loads.
User control is now provided for the handling of self-weight in the end offset portions of beam members.
The speed of analysis has been increased for most load cases.
The iteration strategy for nonlinear static and nonlinear direct-integration time-history load cases has been made more adaptive to typically improve convergence behavior and to reduce the time of analysis.
The line-search algorithm is now available for nonlinear static analysis.
Steel frame design for the Indian IS 800:2007 code now implements the changes in Amendment Number 1.
The display of design input parameters for steel frame design overwrites has been enhanced.
Canadian design codes (i.e., CSA A23.3-04 and CSA S16-09) now include snow loads in the default design combinations.
Multiple enhancements have been made for composite beam design affecting the control of the design process, the look and functionality of the interactive design form, the format and content of the output, and other improvements.
Shear wall design per the Indian IS 456:2000 code now allows separate control in the major and minor directions for enforcing the minimum eccentricity due to slenderness.
Several database tables have been added or have had their content expanded, including the listing of object unique names where applicable.
Table set definitions are now saved in the text model file.

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1

Dec

2014

The purpose of this course is to present the theory and techniques of performance based design in simple physical terms that are very familiar to the practicing structural engineer. Attendees will leave the seminar empowered with a clear understanding of the theory and practical application this new technology.

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1

Oct

2014

The following Enhancements have been implemented for CSiBridge v17.1.0 and 17.1.1: The window refresh speed for Classical Plus graphics has been improved. The speed of analysis has been increased. Other minor enhancements.

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1

Oct

2014

The following Enhancements have been implemented for SAP2000 v17.1.0 and 17.1.1:
The window refresh speed for Classical Plus graphics has been improved.
The speed of analysis has been increased.
Steel frame design according to IS 800:2007 has been updated to include Amendment #1.
Other minor enhancements.

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30

Sep

2014

The purpose of this course is to present the theory and techniques of performance based design in simple physical terms that are very familiar to the practicing structural engineer. Attendees will leave the seminar empowered with a clear understanding of the theory and practical application this new technology.

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16

Sep

2014

As part of the Structural Engineers Association of California Annual Convention, nearly four hundred structural and earthquake engineering professionals gathered at one of Rancho Mirage’s most magnificent private estates for a once-in-a-lifetime dinner party experience.

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3

Sep

2014

The enormous increase in speed and memory capacity of inexpensive personal computers and the development of new numerical methods allow structural engineers to conduct earthquake response analysis of large and complex three-dimensional structures. Therefore, I am optimistic many structural engineers will realize linear and non-linear time-history dynamic analysis of structures is not difficult and performance based design is now a reality.

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