Improved structural design of seismic resistant adobe houses in developing areas in Peru.

136 Pages·2015·9.52 MB·English

by  Elin Mattsson

ISRN UTH-INGUTB-EX-B-2015/31-SE
Examensarbete 15 hp
Juli 2015
Improved seismic-resistant design
of adobe houses in vulnerable
areas in Peru
- Raising seismic awareness in an Andean
community
Elin Mattsson

IMPROVED SEISMIC-RESISTANT
DESIGN OF ADOBE HOUSES IN
VULNERABLE AREAS IN PERU

Raising seismic awareness in an
Andean community

Elin Mattsson
Department of Engineering Sciences, Construction Engineering,
Uppsala University
Bachelor´s Degree project 2015
This bachelor´s degree project is made at the Department of Engineering
Sciences, Construction Engineering, Uppsala University, Box 337, 751 05
Uppsala, Sweden

The project was conducted at the Civil Engineering Division, Department of
Engineering, Pontifical Catholic University of PERU (PUCP), Av.
Universitaria 1801, Lima, Peru

Abstract
Improved seismic-resistant design of adobe houses in
vulnerable areas in Peru
Elin Mattsson

Teknisk- naturvetenskaplig fakultet
UTH-enheten During the last decades, many seismic reinforcement techniques of adobe houses
have been developed. None of the techniques has however reached out to the people
Besöksadress: in need, mainly due to high costs. To prevent unacceptable seismic risks in rural areas,
Ångströmlaboratoriet
it is necessary to develop technology transfers along with training and educational
Lägerhyddsvägen 1
Hus 4, Plan 0 programs.
PUCP (The Pontifical Catholic University of Peru) has started a training project on
Postadress: earthquake resistant adobe constructions, addressed to inhabitants in an Andean
Box 536
community. Their attention is set at this time, to the district of Pullo, which is located
751 21 Uppsala
in a highly seismic area. 80 % if the population is living in adobe houses and more than

Telefon: 50 % of them are living in poverty. PUCP is leading an extensive project, which
018 – 471 30 03 objectives are to work with people in order to make them aware of the vulnerability
of unreinforced adobe houses, and practically lean the technique of reinforcement
Telefax:
with nylon ropes, called halyards.
018 – 471 30 00
On the 24th of August 2014 an earthquake measuring 6.9 on the Richter scale hit
Hemsida: the district of Pullo. The situation in Pullo was evaluated to be heavily affected but

http://www.teknat.uu.se/student concluded not to be urgent. Therefore a training project instead of reconstruction
program was planned. The initiative aimed to raise seismic awareness among the
people, and transfer knowledge on how to build seismic-resistant adobe homes.
The work included in this report is part of the long term project at PUCP. Firstly,
the acquired knowledge on adobe construction’s techniques, seismic effect on adobe
houses built using different methods is included. A more detailed description of the
new developed construction system is introduced, which was obtained by the
experience gained by direct part-taking on the training project. The training and
experimental stage of the project development included experimental testing on
different constitutive parts of the constructive system, such as reinforcing rope-knots,
manufacturing of adobe scaled building models, training of a portable shacking table,
and socio-anthropologic experiments performed in situ. The use of modified tensile
experiments, visual observation led to a recommendation of two knots, which proved
to bring about the best structural performance in relation to seismic resistance. The
manufacture of scale-building models in combination to the portable shaking table
proved excellent results for direct comparison of structural behavior as well as in-situ
educational purposes, instructing the people of Pullo about the new system. The
latter added a direct and deep impact on the people, which results are to be shown in
the future, by the follow-up of the project and the construction of new houses using
the developed system.
Key words: Peru, earthquakes, adobe, reinforcement, training tools,
rope-reinforcement, portable shaking table.
Handledare: Marcial Blondet
Ämnesgranskare: Ivón Hassel
Examinator: Caroline Öhman
ISRN UTH-INGUTB-EX-B-2015/31-SE

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Acknowledgement
This degree project has been conducted within a project at PUCP. Parts of this
final report will serve as base for future publications on the topic.

Foremost, I would like to thank doctor Marcial Blondet for accepting me on his
project which made this wonderful experience possible. His guidance,
knowledge, insightful comments and hard questions pushed me to encourage
my research and allowed me to grow as a research scientist. My greatest
gratitude goes to my subject reader, Ivón Hassel, for her continuous support,
patience, enthusiasm and immense knowledge on how to perform a thesis. I
also want to thank Carlos Sosa for welcoming me, and sharing his knowledge
during the work with the ropes.

And finally, a very special and grateful thanks to Malena Serrano Lazo. You
were there for me from day one. You showed me that everything is possible in
Peru, if you just take a safe taxi. I will never forget all the chats and beautiful
moments I shared with you.

Uppsala, Sweden
May 2015

Elin Mattsson

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