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MS Final Exam – Paris Kalathas

Dynamic Analysis and Comparison of High-Rise Building Frames Made Of Mass-Timber and Traditional Materials Using Finite Element Analysis

The increased demand for building materials that are friendly to the environment, along with the latest advances in wood science and technology, which exploit the fiber orientation of wood, resulted in composite wood materials called mass-timber products. To understand the effects from altering the wood fiber orientation on the dynamic behavior of buildings and on vibration comfort, we examine twenty four high-rise building frames made from four different structural materials: conventional wood (Douglas-Fir), glued laminated timber (Glulam), cross laminated timber (CLT), steel and concrete. Utilizing the well-established Finite Elements Analysis (FEA), we applied a frequency extraction analysis, a modal dynamics analysis, an impulse response and an earthquake response analysis. These experiments revealed information about the frames such as natural frequencies (modes), resonance displacement, damping ratio, force propagation and dynamic response due to earth! quake excitation. The results showed that the mass timber products, glulam and CLT, when combined demonstrate exceptional dynamic behavior resulting in higher damping coefficients and reduced floor displacements compared to the other materials. However, they exhibited vibrations at a high frequency range, a behavior that needs further investigation in order to evaluate how it affects the integrity and longevity of the building frames.

Major Advisor: Yue Zhang
Committee: Ben Lee
Committee: Mike Bailey
Committee: Lizhong Chen
GCR: Arijit Sinha

Friday, June 14, 2019 at 11:00am to 1:00pm

Kelley Engineering Center, 1005
110 SW Park Terrace, Corvallis, OR 97331

Event Type

Lecture or Presentation

Event Topic

Research

Organization
Electrical Engineering and Computer Science
Contact Name

Calvin Hughes

Contact Email

calvin.hughes@oregonstate.edu

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