The Effects of Placement and Cross-Section Shape of Shear Walls in Multi-Story RC Buildings with Plan Irregularity on Their Seismic Behavior by Using Nonlinear Time History Analyses
Environmental and functional conditions, sometimes,
necessitate the architectural plan of the building to be asymmetric,
and this result in an asymmetric structure. In such cases finding an
optimal pattern for locating the components of lateral load bearing
system, including shear walls, in the building’s plan is desired. In
case of shear wall in addition to the location the shape of the wall
cross-section is also an effective factor. Various types of shear walls
and their proper layout might come effective in better stiffness
distribution and more appropriate seismic response of the building.
Several studies have been conducted in the context of analysis and
design of shear walls; however, few studies have been performed on
making decisions for the location and form of shear walls in multistory
buildings, especially those with irregular plan. In this study, an
attempt has been made to obtain the most reliable seismic behavior of
multi-story reinforced concrete vertically chamfered buildings by
using more appropriate shear walls form and arrangement in 7-, 10-,
12-, and 15-stoy buildings. The considered forms and arrangements
include common rectangular walls and L-, T-, U- and Z-shaped plan,
located as the core or in the outer frames of the building structure.
Comparison of seismic behaviors of the buildings, including
maximum roof displacement and particularly formation of plastic
hinges and their distribution in the buildings’ structures, have been
done based on the results of a series of nonlinear time history
analyses, by using a set of selected earthquake records. Results show
that shear walls with U-shaped cross-section, placed as the building
central core, and also walls with Z-shaped cross-section, placed at the
corners give the building more reliable seismic behavior.
[1] A. M. Chandler and G. L. Hutchinson, “Torsional coupling effects in the
earthquake response of asymmetric buildings”, Engineering
Structures, 1986, 8(4), 222-236.
[2] M. Bosco, A. Ghersi, E. Marino, P. P. and Rossi, “Effects of in elevation
irregularity on the elastic seismic response of in-plan asymmetric
buildings”, Proceedings of the third European workshop on the seismic
behaviour of irregular and complex structures, CD ROM, Florence,
September 2002.
[3] S. H. Jeong, A. M. Mwafy and A. S. Elnashai, “Probabilistic seismic
performance assessment of code-compliant multi-story RC buildings”,
Engineering Structures, 2012, 34, 527-537.
[4] J. Wdowicki and E. Wdowicka, “Three-dimensional analysis of
asymmetric shear wall structures with connecting and stiffening beams,
Engineering Structures, 2012, 42, 362-370.
[5] A. Kaveh and P. Zakian, “Optimal seismic design of Reinforced
Concrete shear wall-frame structures”, KSCE Journal of Civil
Engineering, 2014, 18(7), 2181-2190.
[6] V. R. Harne, “Comparative Study of Strength of RC Shear Wall at
Different Location on Multi-storied Residential Buildings, 2014.
[7] A. Kheyrodin and A. Mortezaie, "The analysis of linear and non-linear
behaviors of shear walls", 2002.
[8] ASCE, “Seismic Rehabilitation of Existing Buildings (ASCE-41-06)”,
American Society of Civil Engineers (ASCE), 2007.
[9] M. Aminnia, “Optimizing shear walls in 7 to 15 stories RC building in
High-seismic region on soil type III (in Persian), M.Sc. Thesis under
supervision of Dr. Mahmood Hosseini, submitted to Tehran Central
Branch of the Islamic Azad University (IAU), Tehran, Iran, 2014.
[1] A. M. Chandler and G. L. Hutchinson, “Torsional coupling effects in the
earthquake response of asymmetric buildings”, Engineering
Structures, 1986, 8(4), 222-236.
[2] M. Bosco, A. Ghersi, E. Marino, P. P. and Rossi, “Effects of in elevation
irregularity on the elastic seismic response of in-plan asymmetric
buildings”, Proceedings of the third European workshop on the seismic
behaviour of irregular and complex structures, CD ROM, Florence,
September 2002.
[3] S. H. Jeong, A. M. Mwafy and A. S. Elnashai, “Probabilistic seismic
performance assessment of code-compliant multi-story RC buildings”,
Engineering Structures, 2012, 34, 527-537.
[4] J. Wdowicki and E. Wdowicka, “Three-dimensional analysis of
asymmetric shear wall structures with connecting and stiffening beams,
Engineering Structures, 2012, 42, 362-370.
[5] A. Kaveh and P. Zakian, “Optimal seismic design of Reinforced
Concrete shear wall-frame structures”, KSCE Journal of Civil
Engineering, 2014, 18(7), 2181-2190.
[6] V. R. Harne, “Comparative Study of Strength of RC Shear Wall at
Different Location on Multi-storied Residential Buildings, 2014.
[7] A. Kheyrodin and A. Mortezaie, "The analysis of linear and non-linear
behaviors of shear walls", 2002.
[8] ASCE, “Seismic Rehabilitation of Existing Buildings (ASCE-41-06)”,
American Society of Civil Engineers (ASCE), 2007.
[9] M. Aminnia, “Optimizing shear walls in 7 to 15 stories RC building in
High-seismic region on soil type III (in Persian), M.Sc. Thesis under
supervision of Dr. Mahmood Hosseini, submitted to Tehran Central
Branch of the Islamic Azad University (IAU), Tehran, Iran, 2014.
@article{"International Journal of Architectural, Civil and Construction Sciences:71053", author = "Mohammad Aminnia and Mahmood Hosseini", title = "The Effects of Placement and Cross-Section Shape of Shear Walls in Multi-Story RC Buildings with Plan Irregularity on Their Seismic Behavior by Using Nonlinear Time History Analyses", abstract = "Environmental and functional conditions, sometimes,
necessitate the architectural plan of the building to be asymmetric,
and this result in an asymmetric structure. In such cases finding an
optimal pattern for locating the components of lateral load bearing
system, including shear walls, in the building’s plan is desired. In
case of shear wall in addition to the location the shape of the wall
cross-section is also an effective factor. Various types of shear walls
and their proper layout might come effective in better stiffness
distribution and more appropriate seismic response of the building.
Several studies have been conducted in the context of analysis and
design of shear walls; however, few studies have been performed on
making decisions for the location and form of shear walls in multistory
buildings, especially those with irregular plan. In this study, an
attempt has been made to obtain the most reliable seismic behavior of
multi-story reinforced concrete vertically chamfered buildings by
using more appropriate shear walls form and arrangement in 7-, 10-,
12-, and 15-stoy buildings. The considered forms and arrangements
include common rectangular walls and L-, T-, U- and Z-shaped plan,
located as the core or in the outer frames of the building structure.
Comparison of seismic behaviors of the buildings, including
maximum roof displacement and particularly formation of plastic
hinges and their distribution in the buildings’ structures, have been
done based on the results of a series of nonlinear time history
analyses, by using a set of selected earthquake records. Results show
that shear walls with U-shaped cross-section, placed as the building
central core, and also walls with Z-shaped cross-section, placed at the
corners give the building more reliable seismic behavior.", keywords = "Vertically chamfered buildings, non-linear time
history analyses, L-, T-, U- and Z-shaped plan walls.", volume = "9", number = "10", pages = "1327-8", }