An Equivalent Frame Model for Seismic Analysis of Existing Masonry Building

Abstract:

Collapse safety is the most important objective of performance-based seismic design. Buildings should have enough safety margin to avoid collapse during severe or mega earthquake. However, current Chinese seismic design code does not have explicit design specification or quantitative evaluation for collapse-resistant capacity. Take a two-story masonry building as an example, an equivalent frame model for pushover and incremental dynamic analysis are established, and the comparison are also studied. In addition, the fragility curves can also be obtained. The analysis results show that the results of plastic hinge mainly appear in ground floor wall between windows and doors. Moreover, the analysis result has good uniformity with seismic damage. Judging from the failure mechanism, pushover and incremental dynamic analysis have very good similarity. In addition , they show elastic deformation is very small and brittleness is very apparent of the masonry building.Seismic vulnerability analysis shows that the significant damage and the near collapse curves are very close to each other .This mean that , once the significant damage limit state is reached ,only small PGA increments are need for reaching the near collapse limit state.

• Periodical: Advanced Materials Research (Volumes 255-260)
• Pages: 2478-2482
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.255-260.2478
• Online since: May 2011
• Authors: Qi Wang Su, Yang Xia, Shi Chun Zhao
• Keywords: Equivalent Frame, Fragility Curves, Incremental Dynamic Analysis, Masonry Building, Pushover Analysis

References

[1] Zhan jianxun: Masonry building(Wuhan University of Technology Press, China 2009 )

[2] National Standard of the People's Republic of China: Code for design of masonry structures(China Architecture & Building Press, China 2002)

[3] National Standard of the People's Republic of China: Code for design of concrete structures(China Architecture & Building Press, China 2002)

[4] National Standard of the People's Republic of China: Code for seismic design of buildings (China Architecture & Building Press, China 2008)

[5] National Standard of the People's Republic of China: Standard for seismic appraiser of building (China Architecture & Building Press, China 2009)

[6] Lourenco P B ,Roque J A: submitted to Journal of Construction and Building Materials (2006)

[7] Moroni M O, Astroza M: submitted to Journal of Performance of Constructed Facilities (2004)

[8] Laurent Pasticier, Claudio Amadio, Massimo Fragiacomo: submitted to Journal of earthquake engineering and structural dynamics (2008)

[9] Farzad Naeim, Zhongzhi Shi: The seismic design handbook (The Netherlands as a part of Springer Science +Business Media, Netherlands 2001)

[10] Ray Clough,Joseph Penzien: Dynamics of structures(Computers and Structures, Inc, USA1995)

[11] Li Xiao, Zhao shichun: Analysis of seismic damage of engineering structures in wenchuan earthquake (Southwest Jiaotong University Press, China 2008)

[12] Qiwang Su, Hongru Cai , Li Li: submitted to Journal of Sichuan Building Science (2008)

[13] Tsinghua University, Southwest Jiaotong University, Beijing Jiaotong University: The Analysis Report of Building Earthquake damaged and Retrofit (2008)