Investigation of the Rocking Motion of RC Buildings Dual Shear Wall-Frame Structures

Document Type : Original Article

Authors

1 M.Sc. Candidate, Department of Civil Engineering, Islamshahr branch, Islamic Azad University, Islamshahr, Iran.

2 Assistant Professor, Department of Civil Engineering, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran.

3 Assistant Professor, Department of Civil Engineering, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran

Abstract

The foundation is usually assumed to be rigid, in the design of buildings and the impact of soil type on the flexibility of the foundation is not directly applied in simulations. However, considering the interaction between soil and structure can affect the structure's response. On the other hand, shear walls are widely used in concrete buildings today. When these walls are affected by severe earthquakes, elevation and oscillating movements can be seen at the base of these systems. As a result, the foundations of these systems are lifted from the ground under certain conditions. In this study, the support conditions of columns and shear walls in concrete RC buildings with dual shear wall-frame were investigated. For this purpose, at first, an 8-storey concrete building with a dual RC shear wall-frame system was analyzed and designed in accordance with the national building regulations of Iran using SAP2000 software. In the next step, the outer frame of the structure was simulated using finite element method and ABAQUS software under two different boundary conditions. In the first case, the effect of the foundation was evaluated as rigid and in the second case, the effect of the foundation was evaluated with the possibility of lifting (creating a rocking motion). In order to consider the possibility of lifting the foundation and local-nonlinearity of the soil (creating a rocking motion) springs depending on the type of soil were defined with Bowles stiffness values. The variables include the type of boundary conditions, the strength of the concrete (C21, C40, and C60) and the type of soil (Clay, loose sand and dense sand). The results showed that considering the possibility of lifting the structure by a rocking motion depends on the characteristics of the soil under the foundation, so that the type of soil can play a role in stress, lateral displacement and base shear of the structure. Also, in frames where the boundary conditions of the column and shear walls were considered to be flexible, the change in soil type caused the maximum stress changes of the frame to reach about 60%.

Keywords

Main Subjects

References

  [1] Housner G. W., (1963), "The Behavior of Inverted Pendulum Structures During Earthquakes", Bulletin of the Seismological Society of America, Vol. 53, No. 2, pp. 403-417.
[2] Rutenberg A., Jennings P. C. and Housner G. W., (1982), “The Response of Veternas Hospital Building 41 in the San Fernando Earthquake”, Earthquake Engineering and Structural Dynamics, Earthquake Engineering and Structural Dynamics, Vol. 10, pp. 359-379.
[3] Yim C. and Chopra A. K., (1984), “Earthquake Response of Structures with Partial Uplift on Winkler Foundation”, Earthquake Engineering and Structural Dynamics, Vol. 12, pp. 263-281.
[4] Haggblad, D., Nordgren, G., (1987),"Modeling nonlinear soil-structure interaction using interface elements, elastic-plastic soil elements and absorbing infinite elements", Computers & Structures, Vol. 26, No. 1, pp. 307-324.
[5] Noorzaei, J., Godbole, P.N., Viladkar, M.N., (1993), "Nonlinear soil structure interaction of plane frames- a parametric study", Computers & Structures, Vol. 49, No. 3, pp. 561-566.
[6] Nakhaei, M., Ghannad, M.A., (2008), "The effect of soil-structure interaction on damage index of buildings", Engineering Structures, Vol. 30, pp. 1491-1499.
[7] Vetr, M. G., Nouri, A. R., & Kalantari, A. (2016). Seismic evaluation of rocking structures through performance assessment and fragility analysis. Earthquake Engineering and Engineering Vibration, 15(1), 115-127.
[8] Pelekis, I., Madabhushi, G. S., & DeJong, M. J. (2018). Seismic performance of buildings with structural and foundation rocking in centrifuge testing. Earthquake Engineering & Structural Dynamics, 47(12), 2390-2409.
[9] Khanmohammadi, M., & Mohsenzadeh, V. (2018). Effects of foundation rocking and uplifting on displacement amplification factor. Earthquake Engineering and Engineering Vibration, 17(3), 511-525.
[10] Anderson, D D, (2003). Effect of foundation rocking on the seismic response of shear walls. Canadian Journal of Civil Engineering, 30: 360–365.
]11 [نادرپور, حسین؛ محمدرضا شارعی و پویان فخاریان، ۱۳۹۷، کاربرد روش های هوش مصنوعی جهت تخمین مقاومت برشی دیوار برشی بتن آرمه، دهمین کنفرانس ملی بتن، تهران، انجمن بتن ایران
[12] Gokkus, U., Yildirim, M., & Yilmazoglu, A. (2018). Prediction of Concrete and Steel Materials Contained by Cantilever Retaining Wall by Modeling the Artificial Neural Networks. Journal of Soft Computing in Civil Engineering, 2(4), 47-61.
‌]13 [مبحث نهم مقررات ملی ساختمان، (1392)، طرح و اجرای ساختمان های بتنی، دفتر تدوین و ترویج مقررات ملی ساختمان [وزارت مسکن و شهرسازی، معاونت امور مسکن و ساختمان]، تهران: نشر توسعه ایران.
]14 [مبحث ششم مقررات ملی ساختمان، (1392)، بارهای وارد بر ساختمان، دفتر تدوین و ترویج مقررات ملی ساختمان [وزارت مسکن و شهرسازی]، تهران: نشر توسعه ایران.
[15] آیین‌نامه طراحی ساختمان‌ها در برابر زلزله (استاندارد 2800)، (1392)، ویرایش جهارم، مرکز تحقیقات ساختمان و مسکن، وزارت مسکن و شهرسازی.
[16] SAP 2000. (2009). Advanced structural analysis program. Version 12. Berkeley, CA, USA: Computers and Structures, Inc. (CSI).
[17] Abaqus theory manual.Version Hibbitt.(2016).Pawtucket (RI): Karlsson and Sorensen, Inc.
[18] Bowles, Joseph E. (1996), “Foundation Analysis and Design”. 5th edition. McGraw-Hill
[19] Grigorian, C. E., & Grigorian, M. (2016). Performance control and efficient design of rocking-wall moment frames. Journal of Structural Engineering, 142(2), 04015139.
[20] Grigorian, M., & Grigorian, C. (2016). An introduction to the structural design of rocking wall-frames with a view to collapse prevention, self-alignment and repairability. The structural design of tall and special buildings, 25(2), 93-111.
[21] Khanmohammadi, M., & Heydari, S. (2015). Seismic behavior improvement of reinforced concrete shear wall buildings using multiple rocking systems. Engineering Structures, 100, 577-589.
[22] Pollino, M. (2015). Seismic design for enhanced building performance using rocking steel braced frames. Engineering Structures, 83, 129-139.
[23] Nayal, R., & Rasheed, H. A. (2006). Tension stiffening model for concrete beams reinforced with steel and FRP bars. Journal of Materials in Civil Engineering, 18(6), 831-841.
[24] Lew, H. S., Bao, Y., Sadek, F., Main, J. A., Pujol, S., & Sozen, M. A. (2011). An experimental and computational study of reinforced concrete assemblies under a column removal scenario. NIST Technical Note, 1720, 106.

Files

History

  • Receive Date: 06 January 2020
  • Revise Date: 06 April 2020
  • Accept Date: 29 April 2020

Share

How to cite

Statistics