Bahareque construction is a traditional technique commonly used in Latin American countries prone to high seismic hazards. It involves using natural and locally available materials, such as guadua bamboo and earth. It is a system of earthen or cemented walls supported by a frame of guadua members that provide structural integrity to the wall. Additionally, a woven lattice of thin guadua strips (lath) is attached to the guadua frame, which serves as a support for the infill material application. Nevertheless, properties such as stiffness, lateral strength, damping, displacement capacity, and damage level may change depending on the lath anchorage to the guadua frame. This study evaluates three cases of lath anchorage categorized into two types of bahareque walls (cemented and earthen bahareque). The cases are a cemented bahareque wall constructed with traditional procedures (Case 1), a retrofit of the previous wall with anchored steel bolts between the mortar panel and the guadua frame (Case 2), and an earthen bahareque wall with laths screwed to the frame and a new lath distribution proposal (Case 3). These cases are typically used in seismic regions of Latin America, so it is required to characterize their performance during earthquakes. These cases are studied experimentally through quasistatic lateral loading tests, where short bahareque walls (aspect ratio of 1) are tested to determine structural properties such as stiffness, lateral strength, damping, displacement capacity, and damage level. Moreover, differences among the cases in this study are established to define their advantages and limitations.

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Structural Characterization of Short Bahareque Walls Using Different Lath Anchorage Techniques

  • Diego Sosa,
  • Israel Jiménez,
  • Christian Gómez,
  • Juan Velasteguí,
  • Natividad García-Troncoso,
  • Juan Molina-Cedeño,
  • Cecibel Zambrano

摘要

Bahareque construction is a traditional technique commonly used in Latin American countries prone to high seismic hazards. It involves using natural and locally available materials, such as guadua bamboo and earth. It is a system of earthen or cemented walls supported by a frame of guadua members that provide structural integrity to the wall. Additionally, a woven lattice of thin guadua strips (lath) is attached to the guadua frame, which serves as a support for the infill material application. Nevertheless, properties such as stiffness, lateral strength, damping, displacement capacity, and damage level may change depending on the lath anchorage to the guadua frame. This study evaluates three cases of lath anchorage categorized into two types of bahareque walls (cemented and earthen bahareque). The cases are a cemented bahareque wall constructed with traditional procedures (Case 1), a retrofit of the previous wall with anchored steel bolts between the mortar panel and the guadua frame (Case 2), and an earthen bahareque wall with laths screwed to the frame and a new lath distribution proposal (Case 3). These cases are typically used in seismic regions of Latin America, so it is required to characterize their performance during earthquakes. These cases are studied experimentally through quasistatic lateral loading tests, where short bahareque walls (aspect ratio of 1) are tested to determine structural properties such as stiffness, lateral strength, damping, displacement capacity, and damage level. Moreover, differences among the cases in this study are established to define their advantages and limitations.