Long-term consolidation, seismic dry sand and liquefaction-induced settlements of a soil deposit can impart significant amount of downward load to piles. This load, called downdrag or negative skin friction, is caused by the friction between the pile and the downward moving soil. The magnitude of this force can be estimated by using neutral plane method… Read More
As you all know one of the substantial advantages of Cone Penetration Test (CPT) is that the test provides a continuous profile of soil response. This is why CPT methods generally give superior predictions of axial pile capacity compared to most conventional methods (Robertson, 2015). Bustamante and Gianeselli (1982) proposed a CPT-based analysis procedure based on… 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