This Tcl code creates full-scale three-dimensional continuum model of Meloland Road Overpass (MRO) located in El-Centro, California. The code is generic and can be modified to simulate any two-span bridge with a structure similar to MRO. Ground motion can be applied at the model base in two horizontal directions. Please read the article about base… Read More
You can use this code to (i) compute spectral acceleration response spectrum of a given ground motion, and (ii) compute acceleration, velocity and displacement time histories for a single-degree-of-freedom (SDOF). Numerical integration is implemented by using Newmark-bata method. The code solves the motion equation for a SDOF represented by a mass and dashpot as shown… Read More
This C++ code performs liquefaction triggering analysis per Youd et al. (2001) and Boulanger and Idriss (2014) approaches. The input for the code is CPT data in the format of “.txt”. The input text file should contain depth (ft) in column 1, uncorrected cone resistance (tsf) in column 2, sleeve friction (tsf) in column 3,… Read More
OpenSees implementation of a single pile embedded in a continuum soil domain is described here. The codes are generic and can be modified for various soil domain dimensions, pile depth and soil layers. The file is capable of analyzing seismic response of a single pile system both in dry and saturated soils where liquefaction can… Read More
The Tcl files below perform site response analysis for level ground condition by applying ground motion to a stack of three-dimensional nonlinear soil elements (see Figure 1). I have uploaded two separate codes for dry soil and saturated soil conditions. The code for latter is capable of simulating liquefaction. Please also read the article about base… Read More
Sometimes you need to plot a graph that does not show data when a specific condition applies. For instance, in the process of liquefaction triggering analysis you may want to plot a graph that shows the variation of fines content for depths with Ic less than 2.6. You may try the options below without using… Read More
Approach of Boulanger and Idriss (2014) for liquefaction analysis requires performing iterations to determine and . In case you need to develop an excel spreadsheet that evaluates liquefaction based on Boulanger and Idriss (2014) approach, you may need to use the Macro below. Please note that based on my personal experience Excel’s built-in iteration module does… Read More