TY - JOUR
T1 - Bi-axial shaking table tests to evaluate the seismic performance of two-story rammed-earth walls retrofitted with steel plates
AU - Ruiz, Daniel M.
AU - Barrera, Natalia
AU - Reyes, Juan C.
AU - Alvarado, Yezid A.
AU - Villalba-Morales, Jesús D.
AU - Gómez, Iván D.
AU - Vacca, Hermes A.
AU - Carrasco Beltrán, Daniela
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer Nature B.V.
PY - 2023/11
Y1 - 2023/11
N2 - Worldwide, unreinforced earthen buildings have shown poor performance during earthquakes, causing deaths and loss of property. The Spaniards that conquest the Americas built with earthen materials for about four centuries and therefore, there are a large number of historic buildings in the northern Andean zone of South America. This territory is geographically located in intermediate and high seismic hazard zones. Over the last few years, the authors proposed a seismic reinforcement system for historic earthen buildings based on A36 steel plates (100 × 6.35 mm) installed on both sides of the walls. However, to date, the studies had been focused on tests of one-story buildings subjected to in-plane pseudo-static loads or uniaxial dynamic loads. For this reason, this research assesses the seismic performance of two-story rammed-earth walls subjected to ground motions using a bidirectional shaking table. Two 1:2 scale RE walls (one retrofitted with steel plates and another unreinforced) were tested. The specimens were two-story walls with a “Cˮ shape, similar to that found in heritage buildings of the Historic Center of Bogota. Based on the experimental tests, the unreinforced wall presented irreparable damage at acceleration levels higher than 0.34 g. In contrast, the retrofitted wall had excellent performance with lower damage levels and residual drifts; this specimen was highly resilient, withstanding earthquakes with peak ground acceleration (PGA) greater than 0.76 g.
AB - Worldwide, unreinforced earthen buildings have shown poor performance during earthquakes, causing deaths and loss of property. The Spaniards that conquest the Americas built with earthen materials for about four centuries and therefore, there are a large number of historic buildings in the northern Andean zone of South America. This territory is geographically located in intermediate and high seismic hazard zones. Over the last few years, the authors proposed a seismic reinforcement system for historic earthen buildings based on A36 steel plates (100 × 6.35 mm) installed on both sides of the walls. However, to date, the studies had been focused on tests of one-story buildings subjected to in-plane pseudo-static loads or uniaxial dynamic loads. For this reason, this research assesses the seismic performance of two-story rammed-earth walls subjected to ground motions using a bidirectional shaking table. Two 1:2 scale RE walls (one retrofitted with steel plates and another unreinforced) were tested. The specimens were two-story walls with a “Cˮ shape, similar to that found in heritage buildings of the Historic Center of Bogota. Based on the experimental tests, the unreinforced wall presented irreparable damage at acceleration levels higher than 0.34 g. In contrast, the retrofitted wall had excellent performance with lower damage levels and residual drifts; this specimen was highly resilient, withstanding earthquakes with peak ground acceleration (PGA) greater than 0.76 g.
KW - Earthen walls
KW - Rammed-earth
KW - Shaking table tests
KW - Steel plates reinforcement
KW - Structural dynamic response
KW - Two-story earthen buildings
UR - http://www.scopus.com/inward/record.url?scp=85171288927&partnerID=8YFLogxK
U2 - 10.1007/s10518-023-01769-w
DO - 10.1007/s10518-023-01769-w
M3 - Article
AN - SCOPUS:85171288927
SN - 1570-761X
VL - 21
SP - 6393
EP - 6422
JO - Bulletin of Earthquake Engineering
JF - Bulletin of Earthquake Engineering
IS - 14
ER -