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Thoughts, opinions and experiences on earthquake engineering, international development cooperation, risk assessment, analysis and communication
Oct 26, 2007
2nd North American Rotary Emergency Disaster Initiative Workshop - December 14-15, 2007 - Nashville, Tennessee
Sep 7, 2007
Importance of community involvement on the road to school seismic safety
wealth of engineering expertise – schools collapse in earthquakes . . . Every that is
EVERY school should be inspected and where necessary reinforced. This is so
basic to risk mitigation in a seismically active area, it seems foolish to have to
write it down.” [...]
Jul 13, 2007
Jul 10, 2007
May 31, 2007
Build back better. The experience of the Irpinia 1980 earthquake in Potenza, Italy








May 26, 2007
Brian Tucker. GEOHAZARDS INTERNATIONAL www.geohaz.org


"[...] The more I saw California successfully dealing with its [seismic] risk, the more I thought of the far greater risk abroad and the far fewer resources available there to address it. Over several years, the idea gradually grew in me to create a non-profit organization that would apply the science, engineering and public policy that had helped the U.S., Japan and Europe manage their earthquake risks to the world’s most vulnerable countries."
http://www.geohaz.org/contents/publications/Opinion.pdf
http://www.geohaz.org/contents/publications/BET_DC_speech_for_website6.pdf
“[…] Why should the citizens of industrialized countries, distant from most earthquake threatened developing countries, care that there is a growing gap between the seismic risk of developing and industrialized countries and that not nough is being done?
[…] We should also care out of self-interest. We in industrialized countries understand that the growing gaps between rich and poor in our own countries led to social tensions. We can therefore realize that the widening of the gap between the industrialized and developing worlds is threatening. We will be more secure if all countries can develop without being periodically set back by natural disasters. It is in our economic self-interest, particularly, that developing countries become earthquake-resistant because they are increasingly important economic partners of the
Brian E. Tucker
GeoHazards International
200 Town and
tucker@geohaz.org
Apr 27, 2007
SEISMIC ISOLATION TO MITIGATE EARTHQUAKE IMPACT

"The recent earthquakes have again emphasized the fact that the major loss of life in earthquakes happens when the event occurs in developing countries. Even in relatively moderate earthquakes in areas with poor housing, many people are killed by the collapse of brittle, heavy, unreinforced masonry or poorly constructed concrete buildings. Modern structural control technologies such as active control or energy dissipation devices can do little to alleviate this, but it is possible that seismic isolation could be adapted to improve the seismic resistance of poor housing and other buildings such as schools and hospitals in developing countries". (J.M.Kelly).

Apr 26, 2007
THE BASE ISOLATED LOW-INCOME RESIDENTIAL BUILDING OF RAPOLLA, POTENZA, ITALY
This video shows the construction progress, the placement of the isolators between the foundation and the base of the building, and the sequence of the seismic tests perfomed. (Courtesy F. Braga, M. Laterza).
During a strong earthquake the structure can move independently from the foundations, and undergo no damage. (Courtesy F. Braga, M. Laterza).
Due to the high flexibility of rubber isolators the structure is able to accomodate large movements while still carrying the vertical loads. In this way the impact of the earthquake is reduced through slow high amplitude controlled vibrations. (Courtesy F. Braga, M. Laterza).
The sliding isolator allows a better control of the movement, while still carrying the vertical load. The simple manifacturing process (a steel plate sliding against a PTFE pad) makes it particularly convenient for applications in developing countries. (Courtesy F. Braga, M. Laterza).
COMPUTER SIMULATION. The seismic vibrations are simulated making a "virtual" test. Modern software tools allow engineers to create the action of earthquakes on a computer model of the structure. The dynamic behavior of the real building can be reproduced with good accuracy. These tools are extremely useful in the design of a new building or for the analysis and retrofit of a deficient existing one. Seismic building codes provide the engineering practice with guidelines and assistance in the design and in the use of analysis tools and software.
Study of Nonlinear Response of Base-Isolated Building through Large-Scale Free-Vibration Tests and Nonlinear Analyses
ABSTRACT
Base isolation is a technique adopted with success for the seismic protection of structures worldwide. Since the commonly employed isolation devices often exhibit a nonlinear behavior, laboratory tests are always needed to support both the design and the research. Various researchers have carried out extensive experimental studies on single devices or simplified reduced-scale structural models. Nevertheless, only experimental investigations with large scale structures can provide complete information on the real dynamic interaction between the isolators and the structural or non-structural system components. A base-isolated residential building located in Rapolla,
DOWNLOAD
UCSD,
Michelangelo Laterza's homepage @ UNIBAS, University of Basilicata
F. Braga, M. Laterza, Field testing of low-rise base isolated building, Engineering Structures, Vol./Iss. 26/11 (2004) pp. 1599-1610.
F. Braga, M. Faggella, R. Gigliotti, M. Laterza, 2005. “Nonlinear dynamic response of HDRB or Hybrid HDRB-Friction Sliders base isolation systems” – Bulletin of Earthquake Engineering, Vol 3 n. 3, Springer editor.
F. Braga, M. Faggella, R. Gigliotti, M. Laterza, 2005. “Effetti delle non-linearità costitutive dei sistemi di isolamento sismico e metodi semplificati per la valutazione della risposta” – Ingegneria Sismica, Year 2005 Vol.2, Patron editor.
Mar 26, 2007
UCSD - QUAKE OUTREACH 4 KIDS WITH A SHAKE TABLE
Jan 1, 2007
ROTARY RESEARCH FELLOW
Sponsor RC: Rotary Club Potenza, District 2120, Italy
ROTARY FOUNDATION REPORT - Ambassdorial Scholar

The Department gave me the privilege of opening the academic year "Distinguished Seminars Series" with my invited lecture "Study of Nonlinear Response of Base-Isolated Building through Large-Scale Free-Vibration Tests and Nonlinear Analyses",.
Click HERE to download the INVITE on the department’s website.
I had the honor of being scheduled in a series of distinguished lecturers among which worldwide famous Professors or industry leaders (UCSD Structural Engineering newslwtter, PDF). I gave my presentation to an audience of graduate students and faculty. Also some of the District Foundation Scholar Chairs and other Rotarians that I invited attended the seminar. Since when I applied for my scholarship I decided that bridging the research on seismic prevention and the Rotary service would be the objective of my ambassadorial year. And the seminar confirmed my idea! All the Rotarians were extremely interested in seeing how a base-isolated building can resist an earthquake without minimum damage and save human lives! Also the faculty members that attended the seminar expressed their congratulations for the presentation (seismic testing of a full-scale building in Italy), and I confess that I was extremely honored, since UCSD is a world research leader for full scale testing of structures. Also I think this agrees with the spirit of my ambassadorial role, since I am here to learn, but also to bring my knowledge and background and to bridge two cultures.
RI District 2120 conference, speech.
UNICO, Amici Bal, LIttle Italy mayor, host counsellor Matteo Risi.
Torrey Pines Rotary Club, District Governor Philippe Lamoise, counsellor Matteo Risi.
Since my arrival I have been deeply involved in the Rotary activities of my district. My host counsellor Matteo Risi (of Italian descent!) invited me to the weekly meetings and also to some of the Club dinners. He introduced me to all club members of the Torrey Pines (La Jolla) Rotary Club, an exquisitely intellectual and international environment, with club members originally from different Countries of the world. I felt immediately at ease, talking to different Rotarians in English, Spanish, French, Portuguese and also Italian! Both the club president and the District Governor, member of this club, are French. Matteo also got me involved in the activities of the San Diego Little Italy Community, as a Rotary Ambassadorial Scholar.SalkInstitute, Foundation Seminar, speech.
I have been very active within my host club too, promoting and organizing a special program of the club and bringing the whole club out for a guided laboratory visit of the UCSD Seismic testing facilities. Prof. Restrepo and Prof. Conte showed to the Rotarians the seismic reaction wall that researchers use to test the seismic capacity of full scale building models, and also the outdoor shake table used to simulate an earthquake of destroying intensity. Researchers and Rotarians wore the hard hat and walked together through the hydraulic systems that activate the artificial ground.
UCSD Englekirk Center. Prof. Restrepo shows the shake table to Torrey Pines RC rotarians.UCSD Englekirk Center. Prof. Restrepo shows Torrey Pines RC rotarians the hydraulic system that activate the shake table.
They had the opportunity to share their ideas and competences on seismic protection and also to discuss about the importance of preventing earthquake disasters by making safer structures. I have the feeling that there will be some Rotary-University partnership in future research or educational projects, and I will be proud of being the scholar who got the idea started. But that is exactly what being an “ambassador” means, right?!
California is an amazing state and the environment I am living in, the community of La Jolla, where the University of California San Diego is located, is extremely active and diverse. I am amazed every day by seeing how well organized life is here, and how high-technology, business and international community, share this wonderful natural scenery. I have visited the world famous research centers of La Jolla, the UCSD, the Scripps Institute of Oceanography, the Salk institute, and I am meeting every day international researchers that populate these centers spread over the cliffs overlooking the ocean. La Jollans and San Diegans are extremely helpful people, and as an international Italian scholar I always receive a warm welcome. I am impressed by how strong is the reciprocal cultural interest that Italy and California have. And this makes my ambassadorial role even more meaningful, since my activity field is related to something that Italy and California share not only in their culture, but also in the history, in the research and in the daily life: the interest for earthquakes.
Another significant cultural aspect of the San Diego region, is its proximity to the Mexican border. This makes this place particularly diverse, since here the latino and north-american culture merge together. This gives me the great opportunity of sharing my culture and interests with another part of the world, using my Spanish, in which I guess I am getting pretty fluent, since many of the Mexican people that I met here and also in Tijuana asked me if I was from Spain because of my accent! My English is improving too, and I have been practicing my Portuguese and my French too, expecially thanks to the very multinational atmosphere of the Torrey Pines Rotary Club that is hosting me, and to the diverse study environment of UCSD. Also the influence of the asian culture is very strong here in California, and particularly at UCSD. I met many scientists and students from China, Korea and Japan, and I also made a wonderful friendship with all the other Ambassadorial scholars, with whom I meet periodically during the Rotary events and not only. I had many opportunities to share my research and work interest for earthquakes with Ayako and Hirocky, two rotary scholars from Japan, and I told them that hopefully this same interest that brought me in the amazing California, will very soon take me to Japan!

Ambassadorial Scholar mixer at Don Yeckel's place. We love you Don!