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  • Nov
    13

    SPREE Seminar: Madura Pathirage

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    Automatic Identification of the Lattice Discrete Particle Model Parameters

    Abstract
    Madura Pathirage is a fifth-year Ph.D. candidate of civil engineering within the Mechanics of Quasi-Brittle Materials group led by Professor Gianluca Cusatis, here at Northwestern University. He obtained a Bachelor and a Master's Degree in structural engineering from Ecole Spéciale des Travaux Publics, du Bâtiment et de l'Industrie, France, and a Master of Science in mechanics of materials and solids from Northwestern University. Prior to joining NU, he worked in the field of asphalt testing and modeling, in the research and development departments of LafargeHolcim and Eiffage Travaux Publics (France). His current research interests lie in formulating and validating multi-scale and multi-physics models for the characterization of concrete behavior, based on both experimental work and computational mechanics. In particular, he studies concrete deterioration due to alkali-silica reaction, cement hydration and aging process in concrete, and model calibration with inverse-optimization algorithms. His research also focuses on developing random fields models for concrete, modeling fiber-reinforced concrete, and scratch tests on quasi-brittle materials. He is also involved in a few other research projects including modeling irregular masonry structures and reinforced concrete shear walls, and developing 3-D printing techniques for sulfur concrete.

    Bio
    Model predictions depend largely on the accuracy and robustness of the model itself. The formulations of physics-based models and the well-posedness of the relevant parameter identification are crucial and must be investigated. In order to provide a reliable numerical tool for researchers and engineers, a systematic optimization approach was developed to identify model parameters based on experimental data. This algorithm was successfully implemented and applied to the inverse analysis of concrete mechanical behavior using the Lattice Discrete Particle Model (LDPM). Different optimization schemes tailored to the analyzed problem were evaluated using the numerical response of LDPM as experimental results (pseudo-data), and the robustness of the identification program was demonstrated through the optimization of the LDPM fracture parameters based on typical concrete fracture tests. The method was then applied to actual experimental fracture data with decreasing levels of information. Furthermore, the LDPM response in compression under low and high confinements was analyzed through its dedicated constitutive equations for cohesive and frictional shearing, and nonlinear compressive behavior with strain-hardening. A model selection was finally performed by gradually increasing the number of LDPM meso-level parameters, necessary to carry out the inverse analysis with reference to actual confinement data.

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    TIME Wednesday, November 13, 2019 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Sep
    8

    Welcome & Breakfast for New McCormick PhD Students

    McCormick School of Engineering and Applied Science

    9:00 AM LR2 & Tech East Plaza, Technological Institute

    EVENT DETAILS

    TIME Monday, September 8, 2025 at 9:00 AM - 10:00 AM

    LOCATION LR2 & Tech East Plaza, Technological Institute    map it

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    CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Sep
    10

    CEE Department BBQ

    McCormick - Civil and Environmental Engineering (CEE)

    4:00 PM Dawes House

    EVENT DETAILS

    TIME Wednesday, September 10, 2025 at 4:00 PM - 7:00 PM

    LOCATION Dawes House   

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Sep
    12

    New Undergraduate Fall 2025 Registration

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Friday, September 12, 2025

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar

  • Sep
    12

    New Graduate Student Orientation

    McCormick - Civil and Environmental Engineering (CEE)

    9:00 AM M345, Technological Institute

    EVENT DETAILS

    TIME Friday, September 12, 2025 at 9:00 AM - 5:00 PM

    LOCATION M345, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Sep
    15

    Welcome & Luncheon for New Full-time Graduate Students

    McCormick School of Engineering and Applied Science

    11:00 AM Ryan Auditorium & Tech East Plaza, Technological Institute

    EVENT DETAILS

    TIME Monday, September 15, 2025 at 11:00 AM - 12:30 PM

    LOCATION Ryan Auditorium & Tech East Plaza, Technological Institute    map it

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    CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Sep
    16

    Fall Classes Begin. Change of Registration (Drop/Add) Late registration for returning students begins

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Tuesday, September 16, 2025

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar

  • Sep
    24

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, September 24, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Sep
    26

    EES Seminar- Levia Straka

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, September 26, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Sep
    29

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, September 29, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    1

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 1, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    3

    EES Seminar- Hee-Deung Park

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 3, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    6

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, October 6, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    8

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 8, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    10

    EES Seminar- Benjamin Barrios Cerda

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 10, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    11

    CEE Career Fair

    McCormick - Civil and Environmental Engineering (CEE)

    9:00 AM Louis Room, Norris University Center

    EVENT DETAILS

    TIME Saturday, October 11, 2025 at 9:00 AM - 12:00 PM

    LOCATION Louis Room, Norris University Center    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    13

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, October 13, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    15

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 15, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    17

    Jimmy Quon Lecture: Valorizing Gas Streams Containing CO2 and CO- Bruce Rittman

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 17, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    20

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, October 20, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    22

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 22, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    24

    EES Seminar- Adductomics: A New Tool in the Exposomics Toolbox- Bill Funk

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 24, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    27

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, October 27, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

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