带暗撑剪力墙抗震性能分析摘要.pdfVIP

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带暗撑剪力墙抗震性能分析摘要.pdf

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Seismic Performance of RC Shear Walls with Concealed Bracing W. L. Cao, S. D. Xue* and J. W. Zhang College of Architecture and Civil Engineering Beijing Polytechnic University, Beijing 100022, China (Received 18 December 2001; received in revised form 19 August 2002; accepted 21 August 2002) Abstract: Reinforced concrete shear walls play an important role in improving seismic performance of building structures. In this paper, a new type of RC shear wall with concealed bracing is proposed and investigated. Four 1:3 scale medium-height specimens were designed and a detailed experimental investigation carried out. The load-carrying capacity, stiffness, ductility, hysteretic behavior and energy dissipation of the shear wall are discussed. The failure mechanism was revealed by the experiments. It is found that in comparison with a normal shear wall, the seismic performance of a shear wall can be significantly improved by adding concealed bracing within the wall panel. Finally, a mechanical model of the shear wall is proposed and formulae for calculating load-carrying capacity developed. It is shown that the theoretical results agree well with those from experiments. Key words : reinforced concrete shear wall; seismic performance; concealed bracing; load-carrying capacity; stiffness; ductility; hysteretic behavior; energy dissipation. 1.