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DTSTART;TZID=America/Toronto:20260522T140000
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SUMMARY:Effects of Fire on Concrete - two seminars by professors from Gunma University\, Japan.
DESCRIPTION:Seminar \nFriday\, May 22 at 2-3 p.m. GB217\, Galbraith Building \nThere will be two presentations on effects of fire on concrete buildings presented by: \n  \nProfessor Mitsuo Ozawa\, and Dr. Taku Koyama\, Assistant Professor \nCivil and Environmental Engineering at Gunma University\, Japan. \n  \nPresentation 1. Behavior of Ring-Restrained High-Performance Concrete under Extreme Heating and Development of a Screening Test \nAbstract \nFire represents one of the most critical hazards for concrete buildings and infrastructure\, as it can lead to explosive spalling of concrete. Two primary mechanisms are known to govern fire-induced damage in concrete. The first is restrained thermal dilation\, which generates biaxial compressive stresses parallel to the heated surface and induces tensile strain in the perpendicular direction. The second is the build-up of pore pressure caused by the vaporization of physically and chemically bound water\, which imposes tensile loading on the microstructure of the heated concrete. \nThis study investigates the behavior of restrained high-performance concrete subjected to the extreme heating conditions associated with fire. Thermal stress was estimated from the strain induced in a restraining steel ring\, while vapor pressure within the concrete was measured under heating conditions corresponding to the RABT 30 rapid heating curve. The thermal stress was calculated using the thin-walled cylinder model. \nBased on these evaluations\, a spalling failure model grounded in a tensile strain failure criterion was proposed. The results demonstrate that the model effectively predicts both the initiation of spalling and the resulting spalling depth. \n  \nPresentation 2: Estimation of chloride diffusion coefficients of high-strength concrete with synthetic fibers after fire exposure \nAbstract \nIn this study\, the durability of concrete exposed to fire was investigated based on tracer analysis after the specimens had been soaked in salt water. Two types of concrete specimens: high-strength concrete (HSC) and HSC with polypropylene (PP) fibers were subjected to heating tests at temperatures of 100\, 200\, 300 and 500°C before being soaked for 30 days in a 10% sodium chloride (NaCl) solution. After the soaking period\, chloride penetration depth was measured using electron-probe microanalysis (EPMA)\, and the relevant chloride diffusion coefficients were estimated. Relative chloride penetration was found to be deeper in specimens exposed to higher temperatures. HSC with PP fibers also exhibited greater penetration due to the melting of its fiber content. The chloride diffusion coefficient also increased with higher exposure temperatures.
URL:https://civmin.utoronto.ca/event/effects-of-fire-on-concrete-two-seminars-by-professors-from-gunma-university-japan/
CATEGORIES:Events,Featured
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DTSTART;TZID=America/Toronto:20260529T080000
DTEND;TZID=America/Toronto:20260529T170000
DTSTAMP:20260520T052136
CREATED:20260326T170347Z
LAST-MODIFIED:20260512T125220Z
UID:46026-1780041600-1780074000@civmin.utoronto.ca
SUMMARY:PhD Departmental Defence by Qiujin Ma
DESCRIPTION:A Direct Floor-Response Spectrum Method for Nonlinear Multiple Degree-of-Freedom Structures (PhD Departmental Defence)\nCandidate: Qiujin Ma\nSupervisor: Professor Oh-Sung Kwon\nFriday\, May 29\, 2026 at 10 a.m.\nIn person attendance in SF1009 – Sandford Fleming Building\nOR Join online via MS Teams: https://teams.microsoft.com/meet/2179252371243?p=vWPhqeMvicXeo3sQ7V\nMeeting ID: 217 925 237 124 3.  Passcode: Zt3Vg3Vx
URL:https://civmin.utoronto.ca/event/phd-departmental-defence-by-quijin-ma/
CATEGORIES:Events,Featured
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20260530
DTEND;VALUE=DATE:20260531
DTSTAMP:20260520T052136
CREATED:20260324T131454Z
LAST-MODIFIED:20260324T153259Z
UID:45959-1780099200-1780185599@civmin.utoronto.ca
SUMMARY:Transit Data Challenge 2026 - SUBMISSION DEADLINE
DESCRIPTION:We are pleased to invite you to participate in the Transit Data Challenge 2026\, a national hackathon bringing together Canadian university students to tackle real-world public transit challenges through data analysis and innovative problem-solving.\n\nThe Transit Data Challenge offers students a unique opportunity to work with real transit datasets\, develop applied data science and analytical skills\, and connect with leading researchers\, transit agencies\, and industry professionals shaping the future of urban mobility in Canada.\n\nParticipating teams will present their work to an expert panel\, with finalist presentations taking place live at the TransitData Symposium 2026 in Toronto — one of the premier international forums on public transit data research. Selected projects will also be featured online during a dedicated showcase period\, providing participants with lasting visibility for their work.\n\nKey Dates:\n  • Registration Opens:       March 15\, 2026\n  • Submission Deadline:     May 30\, 2026\n  • Shortlist Announced:      June 5\, 2026 (three finalist teams selected)\n  • Final Presentations:         June 25\, 2026 — Transit Data Symposium 2026\, Toronto\n  • Online Prototype Showcase: June 25 – July 31\, 2026\n\nWe encourage you to share this opportunity with friends in relevant programs\, including transportation engineering\, computer science\, data science\, urban planning\, and related disciplines. Participation is open to undergraduate and graduate students enrolled at Canadian universities and colleges.\n\nFor more information\, registration details\, and challenge guidelines\, please visit https://www.transitdata2026.ca/datachallenge or contact us at tal@utoronto.ca\n\nWe look forward to welcoming you and your team to this exciting national initiative.
URL:https://civmin.utoronto.ca/event/transit-data-challenge-2026-submission-deadline/
CATEGORIES:Events,Featured
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