Seismosignal

SeismoSignal constitutes a simple, yet very efficient, package for the processing of strong-motion data. Amongst other features, it allows for the derivation of elastic and constant ductility inelastic response spectra, the computation of the Fourier and Power spectra, the filtering of unwanted frequency components from the given signal, and the estimation of other important seismological parameters, such as the Arias Intensity, the Cumulative absolute velocity and the significant and effective duration.

Seismostruct

SeismoStruct is a Finite Element package capable of predicting the large displacement behaviour of space frames under static or dynamic loading, taking into account both geometric nonlinearities and material inelasticity. Concrete and steel material models are available, together with a large library of 3D elements that may be used with a wide variety of pre-defined steel, concrete and composite section configurations.

Zeus-NL

ZEUS-NL is the analysis and simulation platform of the MAE Center. It is a state-of-the-art 3D static and dynamic analysis platform specifically developed for earthquake engineering applications. Its extreme efficiency, accuracy, verification and user-friendly graphical user interface has made it easier than ever to undertake inelastic large displacement analysis of complex frames using the fiber approach, with a suite of material models and elements. ZEUS-NL is available free-of-charge. The MAE Center requires that publications including results from ZEUS-NL to include an acknowledgement of the MAE Center and the National Science Foundation (cooperative agreement reference EEC-9701785). The free ZEUS NL license expires on 31 December of each year, and a new version can be downloaded on 1 January of the next year.

Open Seismic Hazard Analysis

OpenSHA is an effort to develop object-oriented, web- & GUI-enabled, open-source, and freely available code for conducting Seismic Hazard Analyses (SHA). Our goal is to provide a framework where any arbitrarily complex (e.g., physics based) earthquake-rupture forecast, ground-motion, or engineering-response model can “plug in” for analysis without having to change what’s being plugged into. Although some applications will be stand alone, our goal is also to enable the various SHA components to be geographically distributed over the internet in what we term a “community modeling environment”, all tied together with a user-friendly web interface. This infrastructure should significantly reduce the gap between cutting-edge geophysics and state-of-the-art hazard and risk evaluations.

Nonlin

NONLIN is a Microsoft Windows based application for the dynamic analysis of single degree of freedom structural systems. The structure may be modeled as elastic, elastic-plastic, or as a yielding system with an arbitrary level of secondary stiffness. The secondary stiffness may be positive, to represent a strain hardening system, or negative, to model P-Delta effects. The dynamic loading may be input as an earthquake accelerogram acting at the base of the structure, or as a linear combination of sine, square, or triangular waves applied at the roof of the structure. The program uses a step-by-step method to solve the incrementally nonlinear equations of motion. See Clough and Penzien for a theoretical description of the solution technique.

While NONLIN may be used for professional practice or academic research, the fundamental purpose of the program is to provide a visual basis for learning the principles of earthquake engineering, particularly as related to the concepts of structural dynamics, damping, ductility, and energy dissipation.

Cyclic-1D

The Cyclic 1D program was developed by: Ahmed Elgamal, Zhaohui Yang, Ender Parra and Ahmed Ragheb. This web site was developed by: Zhaohui Yang, Jinchi Lu, Chester Chan, Hy Tran, and Ahmed Elgamal. Cyclic 1D is an Internet-based nonlinear Finite Element program for execution of one-dimensional site amplification and liquefaction simulations (for level as well as mildly inclined sites). Here, You can build and analyze your own soil profiles, and view and download the computational results. New users please take a look at the Introduction page for a short introduction of the computational model and tips on how to use this site. There, you can also check if your web browser renders Java Applets properly, as all computation results will be displayed using Java Applets.Experienced users may go to Model Builder directly to build a new model or check your last model, or go to Results to view your previous simulation results.To learn more about the theoretical background of the Cyclic 1D program, please visit References for a list of relevant publications.  .

EngiLab Rod.2D

EngiLab Rod.2D is a powerful engineering tool for the linear static analysis of plane (2D) trusses for Windows, using a 2-Degrees of Freedom per node approach.It features a Full GUI (Graphical User Interface) for pre-processing or post-processing and uses the Finite Element Method (FEM) for plane trusses for its analysis needs.
Click EngiLab Rod.2D Features to see a full list of the program's features.
Click EngiLab Rod.2D Screenshots to see screenshots of the program.Go to the Downloads Page to download a free trial.

Response 2000

Sectional analysis program that will calculate the strength and ductility of a reinforced concrete cross-section subjected to shear, moment, and axial load. All three loads are considered simultaneously to find the full load-deformation response using the latest research based on the modified compression field theory. The program was developed at the University of Toronto by Evan Bentz in a project supervised by Professor Michael P. Collins.

Deep Soil (site response analysis)

DEEPSOIL is a 1D site response analysis program with graphical user-interface that can perform both.
1D Nonlinear analysis-
1D Equivalent linear analysis
To learn more about DEEPSOIL v2.6, download the manual.
To download DEEPSOIL, please register online. If you have already registered, login here.

SEAOC Free Software tools

A collection of Excel, Matlab and stand-alone applications that solve simple civil engineering problems