LMIC Meaker Visiting Professor Jose Dario Aristizabal Ochoa, National University of Colombia

Fluid inerter based vibration suppression for enhanced seismic safety and resilience of buildings in Colombia

Dates of visit: to be confirmed

Biography

Professor José Darío Aristizabal Ochoa is a full Professor of Civil Engineering at the National University of Colombia since 1995 and the leader of Structural Stability group. His research interests have focused on stability problems of buildings and bridges, structural design of reinforced and prestressed concrete structures and composite materials. His contributions include the development of the first Triaxial Earthquake Simulator in the world, the development of the theory and the experimental corroboration of the failure of structural walls of reinforced concrete by crushing the soul in buildings subject to great earthquakes, the theoretical development of a system of structural disposable fuses ("Disposable Knee Braces") in structures made of steel, the development of a methodology and formulas for the analysis and design against collapse of buildings (bridges and buildings), etc.

Prof Aristizabal Ochoa achieved his Ms and PhD in Civil Engineering from University of Illinois, USA. He worked as a Research Engineer and Consultant for Research Laboratories of the PORTLAND CEMENT ASSOCIATION in Skokie (USA) from 1977 to 1979. From 1979 to 1981, he was a marketing and seismic and structural applications Manager for MTS SYSTEMS CORPORATION company Minneapolis, Minnesota, USA. After that he was a Professor of Civil Engineering at the Vanderbilt University (USA) from 1981-1987 and University of the State of California (USA) from 1987 to 1994, respectively.

Prof Aristizabal Ochoa has published more than 153 scientific articles in the most prestigious Journals around the world and has directed two research groups recognized by COLCIENCIAS with more than 40 undergraduate and graduate students since January 1995. His works have been referenced in the USA Bridge Design Code (ASSHTO) and in the Prestressing manual of the PCI. 

Summary

Seismic hazards in developing countries seriously damage buildings and causes huge economic losses. To ensure the safety of critical infrastructure in seismically-prone areas vibration suppression devices are often used. Recently, ball-screw inerters have been employed in developed countries such as Japan as they out-perform existing devices. However, their high manufacture and maintenance costs prohibit
applications in developing countries. The fluid inerter is an alternative design that exhibits similar dynamics but crucially at a fraction of the cost. This project will co-develop tailor-made fluid inerters for building seismic safety and resilience enhancement in Colombia, collaborating with academic and industrial partners in Colombia. The case study considering the Mw 7.8 Ecuador-Colombia 2016 (Colombia) will be carried out. The aim is to constitute the first step towards widespread applications of tailor-made fluid inerter based vibration suppression devices in Colombia, and other developing countries, which will effectively contribute to the goal of safe, resilient and sustainable cities and communities.

During his visit Professor Aristizabal Ochoa will be hosted by Dr Jason Zheng Jiang (Mechanical Engineering) and will give the following lectures/seminars (dates and times TBC):

Experimental verification of the effects in the orientation of the columns on the lateral stability of three-dimensional frames
Dynamic and Control Group Seminar (CAME)
This seminar will talk about the experimental comparison of the theoretical model that studies the stability of a column and minimum lateral bending with effects of shear deformation. Experiments are performed to examine the frames using different cross-sectional configurations in
their columns and second-order analysis including the effects of initial imperfections of the columns, structures with irregular shapes (ie L-shaped structures), columns with variation of heights and modes of vibrations.


The generation of technology related to the quality, safety and stability of bridges and buildings
Graduate Student Seminar
This seminar will present an overview of the generation of technology for the design and construction of bridges and buildings against premature collapses.