- Out of plane strength of infill panels
- M. Ghazimahalleh
- The 14th World Conference on Earthquake Engineering, Beijing, China, paper No. 05-04-0066
- Book Title / Journal:
- Year: 2008 , Volume: , Series:
- Earthquake engineering
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- Vulnerability assessment of churches at Colima by 3D limit analysis models
- A. Orduña ; A Preciado ; F. Galván ; J.C. Araiza
- Book Title / Journal: In D. D’Ayala & E. Fodde (eds.), Structural Analysis of Historic Construction, Taylor & Francis Group, London,
- Year: 2008 , Volume: , Series:
- Earthquake engineering
- Description
- This work presents the vulnerability assessment of two churches at the state of Colima by means
of 3D rigid block models, using a limit analysis approach. The paper contains a description of the buildings and
the damage they suffered during the 2003 earthquake. The 3D models were elaborated on the basis of macroblocks defined according to the damage observed after the earthquake and also, taking into account the typical
failure mechanisms in churches reported in the literature. The limit analyses were carried out with a software
already tested and validated elsewhere. The results show that the limit analysis approach with rigid block models
is a valuable tool for the identification of critical failure mechanisms, their associated failure multipliers and, in
a global fashion, for the vulnerability assessment of historical churches. The results also indicate that empirical
methods provide a good estimation of the vulnerability level of this buildings type.
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- A distributed shear and flexural flexibility model with shear-flexure interaction for R/C members subjected to seismic loading
- P.E. Mergos ; A.J. Kappos
- Book Title / Journal: Earthquake Engineering and Structural Dynamics,
- Year: 2008 , Volume: 37 , Series:
- Earthquake engineering
- Description
- Α beam-column type finite element for seismic assessment of R/C frame structures is presented. This finite element consists of two interacting, distributed flexibility subelements representing inelastic flexural and shear response. Following this
formulation, the proposed model is able to capture spread of flexural yielding, as well
as spread of shear cracking, in R/C members. The model accounts for shear strength
degradation with inelastic curvature demand, as well as coupling between inelastic
flexural and shear deformations after flexural yielding, observed in many
experimental studies. An empirical relationship is proposed for evaluating average
shear distortion of R/C columns at onset of stirrup yielding. The proposed numerical
model is validated against experimental results involving R/C columns subjected to
cyclic loading. It is shown that the model can predict well the hysteretic response of
R/C columns with different failure modes, i.e. flexure-critical elements, elements
failing in shear after flexural yielding, and shear-critical R/C members.
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- Ductility of reinforced concrete masonry shear walls under seismic loading
- M. Shedid ; R. Drysdale ; W. El-Dakhakhni
- Book Title / Journal: 14th World Conference on Earthquake Engineering, Beijing, China, Paper 14-05-04-0013
- Year: 2008 , Volume: , Series:
- Earthquake engineering
- Description
- The possibility of achieving a high level of ductility by flexural yielding in fully grouted reinforced concrete
masonry shear walls is evaluated. Six full-scale walls were tested to failure under reversed cyclic lateral loading
to investigate the effects of the amount and the distribution of vertical reinforcement and the level of axial
compressive stress on the inelastic behavior and ductility of reinforced masonry shear walls. The test results
indicated that the top wall displacement at the onset of yielding of the vertical reinforcement was highly
dependent on the amount of reinforcement and minimally affected by the level of axial compressive load.
However, at maximum lateral loads, the wall displacements were less sensitive to the amount of vertical
reinforcement and to the level of axial compression. Correspondingly, the displacement ductility was found to
be very sensitive to the amount of vertical reinforcement compared to the level of axial compression. In general,
high levels of ductility accompanied by relatively small strength degradation were observed for the test
specimens.
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- Seismic response of linear, flanged, and confined masonry shear walls
- M. Shedid ; W. El-Dakhakhni ; R. Drysdale
- Book Title / Journal: 14th World Conference on Earthquake Engineering, Beijing, China, Paper 14-05-04-0015
- Year: 2008 , Volume: , Series:
- Earthquake engineering
- Description
- A potentially limiting feature of reinforced masonry shear walls is the presence of a single line of vertical
reinforcement along the wall length that cannot be effectively tied to delay buckling. Especially under cyclic
loading, when opening and closure of wide cracks occurs, compression closure of the previous tension cracks
causes all of the compressive stresses to be carried by isolated bars at the crack location. This situation affects
the stability of the compression zone and may lead to out-of-plane buckling of the wall or local buckling of the
reinforcement, which can lead to an accelerated degradation in strength due to increased damage. This limitation
may be avoided by using boundary elements at the end zones of the walls or by structurally connecting a linear
wall to an intersecting wall which would limit the damage at the end zone of the wall, provide out-of-plane
stability for the end of the wall, and delay buckling of the vertical bars. The experimental data presented is the
first phase of an investigation of the response of flexural concrete masonry shear walls with various geometries
at the ends of the walls. The conditions studied are the effects of structurally connecting a flange to a linear
reinforced masonry shear wall and of creating a boundary element at each end of the wall. The walls were tested
under reversed lateral cyclic displacement simulating earthquake excitation. Details of the linear, flanged, and
confined wall tests are presented in this paper. In general, high levels of ductility accompanied by relatively
small strength degradation were observed for the test specimens with significant increase in ductility for the
flanged and confined walls.
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- Creating fragility functions for performance-based earthquake engineering
- K.A. Porter ; R.E. Bachman ; R. Kennedy
- Earthquake Spectra, Vol. 23, No. 2, pages 471-489
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering
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- National Disaster Management Guidelines: Management of Earthquakes
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- National Disaster Management Authority Government of India
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering ; Seismic effects
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- M7.7 EQ in Chile ? Initial Report
- C. Ledezma
- Available from the Earthquake Engineering Research Institute (EERI)
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Chile
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- A Reconnaissance Report on The Bengkulu Earthquake of September 12, 2007
- O. Aydan ; F. Imamura ; T. Suzuki ; I. Febrin ; A. Hakam ; M. Mera ; P.R. Devi
- Japan Society of Civil Engineers (JSCE) and Japan Association for Earthquake Engineering (JAEE) with the collaboration of Andalas University and Kogami
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Indonesia
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- A Reconnaissance Report on The 2007 Singkarak Lake (Solok) Earthquake with an Emphasis on the Seismic Activity of Sumatra Fault following 2004 and 2005 great Off-Sumatra Earthquakes
- O. Aydan
- Earthquake Disaster Investigation Sub-Committee, Japan Society of Civil Engineering (JSCE) (Tokai University, Department of Marine Civil Engineering, Shizuoka)
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Indonesia
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- Learning from Earthquakes: The Pisco, Peru Earthquake of August 15, 2007
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- EERI Special Earthquake Report, October 2007. Available from EERI
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Peru
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- 2007 August 15 Magnitude 7.9 Earthquake near the Coast of Central Peru
- F. Taucer ; J. Alarcon ; E. So
- European Earthquake Engineering Field Investigation Team (EEFIT) Preliminary Report. Available from EERI
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Peru
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- Quick Report of Building Damages in 2007 Peru Earthquake
-
- Taiki Saito Building Research Institute, 24th August 2007. Available from BRI
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Peru
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- Reporte Preliminar de Danos en Estructuras debido al Sismo del 15/08/2007
- C. Zavala ; M. Estrada ; P. Gibu ; L. Chang ; L. Cardenas
- Universidad Nacional De Ingenieria Lima-Peru, Facultad de Ingenieria Civil. Centro Peruano Japones De Investigaciones Sismicas Mitigation De Desastres - Cismid. Available from EERI
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Peru
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- A Reconnaissance Report on The Pisco, Peru Earthquake of August 15, 2007
- J. Johansson ; P. Mayorca ; T. Torres ; E. Leon
- Japan Society of Civil Engineers (JSCE), Japan Association for Earthquake Engineering (JAEE) and University of Tokyo with the collaboration of CISMID, National University Engineering
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Peru
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