Response of thin lightly-reinforced concrete walls under cyclic loading. (1st December 2018)

• Record Type: Journal Article
• Authors: Blandon, Carlos A.; Arteta, Carlos A.; Bonett, Ricardo L.; Carrillo, Julian; Beyer, Katrin; Almeida, João P.
• Is Part Of: Engineering structures. Volume 176(2018)
• Page Start: 175
• Page End: 187
• Publication Date: 2018-12-01
• Subjects: Thin wall -- Reinforced concrete -- Cold-drawn reinforcement -- Welded-wire mesh -- Lightly-reinforced slender walls; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2018.08.089
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Thin concrete walls with unconfined boundary elements are evaluated experimentally. Limit states for the tested walls are proposed. Design limits and drift capacity are discussed in terms of the obtained response. Abstract: During the last two decades, thin concrete walls have been frequently used to brace mid- to high-rise buildings in some Latin American countries. This structural system differs significantly in terms of wall geometry and reinforcement layout from traditional cast-in-place reinforced concrete wall buildings. Limited experimental data on this wall system and the absence of post-earthquake field observations make it difficult to assess whether such walls behave similarly to the walls designed according to the current local design code. The paper presents and discusses the results of an experimental program comprising quasi-static cyclic tests of four slender, thin and lightly-reinforced concrete walls with different geometrical configurations, steel properties and reinforcement layouts, which correspond to a common construction practice in Colombia. The seismic response of the specimens was assessed in terms of crack propagation and failure modes, hysteretic and backbone curves, contribution of rocking, flexural, shear and sliding components to lateral drift, stiffness degradation, and energy dissipation capacity. The results suggest that the response of these reinforced concrete walls does not meet the performance specified in the Colombian regulation if they are designed to reach the maximum lateral drift allowed by the code.