Community Profile

photo

Dr. Erol Kalkan, P.E.


US Geological Survey

21 total contributions since 2016

I, Dr. Erol Kalkan, am a research structural engineer and project manager at the Earthquake Science Center of United States Geological Survey in Menlo Park, California.

I earned my B.Sc. degree in Civil Engineering and M.Sc. degree in Engineering Seismology from the Middle East Technical University. My second M.Sc. degree in Structural Engineering is from the Bosporus (Bogazici) University in Turkey. My doctorate degree in Structural Engineering (major) and in Geotechnical Engineering (minor) is from the University of California, Davis. My postdoctoral studies were at the University of California, Berkeley.

I authored and co-authored more than 120 peer-reviewed publications on various issues in structural engineering and engineering seismology.

Contact

Dr. Erol Kalkan, P.E.'s Badges

  • First Answer

View details...

Contributions in
View by

Submitted


Frequency Response Function of Accelerometer (Oscillator)
This code computes frequency response function (FRF) of an accelerometer (SDF Oscillator)

25 days ago | 10 downloads |

Thumbnail

Submitted


FREQUENCY-DOMAIN CROSS-CORRELATION FUNCTION
xcorrFD takes two discrete time signals as input and calculates cross-correlation and delay

1 month ago | 13 downloads |

Thumbnail

Submitted


TIME-DOMAIN CROSS-CORRELATION FUNCTION
xcorrTD takes two discrete time signals as input and calculates cross-correlation and delay

1 month ago | 13 downloads |

Thumbnail

Submitted


NONLINEAR-INELASTIC RESPONSE HISTORY ANALYSIS OF A SDOF OSCILLATOR USING OPENSEES
Fast MatLAB function for nonlinear-inelastic time-history analysis of a SDOF oscillator.

1 month ago | 9 downloads |

Thumbnail

Submitted


Decimate (Downsample) A Signal in Frequency Domain
Frequency domain decimation function to reduce the sampling rate of a signal to a lower rate.

1 month ago | 10 downloads |

Thumbnail

Submitted


Epoch & Unix Timestamp Converter (epoch2UTC)
Converts an epoch/unix timestamp into a human readable date

2 months ago | 1 download |

Thumbnail

Submitted


NONLINEAR-INELASTIC MULTI-AXIAL TIME RESPONSE ANALYSIS OF SDOF OSCILLATOR
Robust MatLAB function for nonlinear-inelastic time-history analysis of SDOF oscillator

2 months ago | 5 downloads |

Thumbnail

Submitted


Nonlinear multi-axial constant ductility response spectra for horizontal, vertical and tilt motions
Robust function to generate multi-component constant-ductility nonlinear-inelastic response spectra.

2 months ago | 4 downloads |

Thumbnail

Submitted


Pseudo spectral acceleration, velocity and displacement spectra
This is a MatLAB function to compute linear-elastic damped response spectrum of time series

4 months ago | 11 downloads |

Thumbnail

Submitted


Graizer-Kalkan (2015) Ground-Motion Prediction Equation
Graizer-Kalkan (2015) Ground-Motion Prediction Equation for earthquake strong motion estimates.

5 months ago | 6 downloads |

Thumbnail

Submitted


An automated P-phase Arrival Time Picker with SNR output
PPHASEPICKER is a powerful tool for automatically picking P-phase onsets.

5 months ago | 26 downloads |

Thumbnail

Submitted


Deconvolution of two discrete time signals in frequency domain
Compute deconvolution of two discrete time signals in frequency domain to study wave propagation.

6 months ago | 9 downloads |

Thumbnail

Submitted


P-PHASE ARRIVAL TIME PICKER BASED ON AKAIKE INFORMATION CRITERION
Computes P-phase arrival time in windowed digital single-component seismic recording using AIC

10 months ago | 10 downloads |

Thumbnail

Submitted


Time-domain Sinc Interpolation (Resampling)
Time-domain SINC resampling (interpolation) function with a simple example

11 months ago | 16 downloads |

Thumbnail

Submitted


Frequency-domain Zero-padding Resampling (Interpolation)
Frequency domain (FFT-based) resampling of discrete-time signal

11 months ago | 2 downloads |

Thumbnail

Responded


Re: Integrating accelerometer data to displacement
I posted two new functions to file exchange to integrate and differentiate time-signals in frequency domain with validations exa...

11 months ago | 7324 views

Submitted


Frequency-domain Differentiation of Discrete Time-Signal
Computes derivative of discrete time-signal in frequency domain

11 months ago | 8 downloads |

Thumbnail

Submitted


Frequency-domain Integration of Discrete Time-Signal
Computes integration of discrete time-signal in frequency domain

11 months ago | 15 downloads |

Thumbnail

Submitted


Nonlinear-inelastic constant yield displacement response spectra
Compute nonlinear-inelastic constant yield displacement response spectra and input energy parameters

11 months ago | 3 downloads |

Thumbnail

Submitted


ASCE 41-06 Displacement Coefficient Method
Displacement coefficient method of ASCE 41-06 based on FEMA 440

1 year ago | 3 downloads |

Answered
Pre-determining the number of lines in a text file
Here is a short and fast way: Say file name to be read is apk.txt fid = fopen('apk.txt','r'); Nrows = numel(textread('a...

1 year ago | 0