Reliability of Reinforced Concrete Wall Shear Strength Equations in Modern Seismic Codes


Abstract eng:
Reinforced concrete (RC) shear walls have been widely used in buildings located in seismic regions due to their high ductility and rigidity against earthquake and wind loads. Majority of the reinforced shear wall buildings which were not constructed based on modern seismic codes (e.g. ASCE 7, ACI 318, Turkish Seismic Code 2007, EuroCode 8, and Japanese Standard for Seismic Evaluation of Existing Reinforced Concrete Buildings 2001) have poor material quality, inadequate reinforcement and detailing. Post-earthquake observations have shown that such buildings are more likely to experience a greater degree of damage or even collapse because of considerable influences of insufficient reinforcement detailing and inadequate material quality. Rehabilitation and retrofit of existing buildings has been vital and commonly used to minimize the risk of possible damage/collapse. For better rehabilitation, it is necessary to understand the behavior of RC shear walls to minimize the risk of potential damages that may occur in the future earthquakes. Shear strength is one of the most prominent properties to represent behavior of reinforced concrete structural walls. This paper aims to assess modern seismic code provisions and to investigate reliability and accuracy of code-estimated shear strength using a detailed wall test database consisting of a large number of shear wall tests (a total of 172) conducted around the world. Specimens in the database were classified based on their failure modes and statistical studies were carried out. Mean values of the ratio of experimental strength to the estimated strength according to ACI 318 were 1.11, 0.79, and 0.66 for shear-controlled, transition, and flexure-controlled walls, respectively. Results of the analyses to determine reliability of estimated shear strength showed that equations provided by ACI 318, Turkish Seismic Code, and Japanese Seismic Code 2001 underestimate the shear strength of shear-controlled walls by 11%, 7%, and 3%, respectively. It is also indicated that equation provided by Turkish Seismic Code 2007 is not appropriate for non-rectangular shear walls.

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Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
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Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 1853.:
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