Evaluation of Seismic Vulnerability of Reinforced Concrete Buildings Adjacent to the Deep Excavations

Document Type : Regular Paper


1 M.Sc. of Structural Engineering, Civil Engineering Department, Semnan Branch, Islamic Azad University, Semnan, Iran

2 Associate Professor, Seismic Geotechnical and High Performance Concrete Research Centre, Civil Engineering Department, Semnan Branch, Islamic Azad University, Semnan, Iran


In this study, the effect of deep excavation on the seismic response of RC moment resisting building systems has been studied. Deep excavation can cause significant changes in the stress and strain levels of soil environment and also changes in the propagation of seismic waves. This leads to permanent displacements in the foundation system. In this study, three RC building systems, i.e. 5, 10, and, 15 stories, were modelled considering the nonlinear behaviour of soil and structural material as well as the soil-structure interaction effect. Nonlinear dynamic responses of buildings were evaluated before and after excavation and also with a rigid base (without soil modelling) under the seven earthquake records. Analysis results indicate an increase in seismic demands and responses in the vicinity of the excavation. So for 15-storey buildings near the excavation, 35% increase in the base shear, 70% increase in maximum drift, 26% increase in the story shear force, and a 30% increase in the maximum story acceleration was observed. As a result, considering the effect of excavation on the seismic response of RC building systems is inevitable.


Main Subjects

[1] Chungsik, Y., Dongyeob, L., (2008). Deep excavation-induced ground surface movement characteristics – A numerical investigation, Computers and Geotechnics, 35(2): 231-252.
[2] Maleki, M., Baei, B. (2010) Excavation-adjacent structure interaction effect on excavation analysis in urban area, journal of civil engineering,Ferdowsi University, 21(2): 25-40.
[3] El Sawwaf, M., Nazir, .A.K. (2012).The effect of deep excavation-induced lateral soil movements on the behavior of strip footing supported on reinforced sand.Journal of Advanced Research, 3(4): 337-344.
[4] Hsieh, P.G., Ou, C.Y., Lin, Y.L. (2013). Three-dimensional numerical analysis of deep excavations with cross walls. ActaGeotechnica, 8(1): 33–48
[5] Abd El-Raheem, A. (2011). Impact on underground deep foundation excavation from adjacent channels during earthquake, Journal of Engineering Sciences, Assiut University, 39(3): 497 -511.
[6] Huang, X., Schweiger, H.F., Huang, H. (2013). Influence of deep excavations on nearby existing tunnels. International Journal of Geomechanics, 13(2), April.
 [7] Castaldo, P., De Iuliis, M. (2014). Effects of deep excavation on seismic vulnerability of existing reinforced concrete framed structures, Soil Dynamics and Earthquake Engineering, 64: 102-112.
[8] Zahmatkesh.A, Choobbasti, A. J. (2015). Evaluation of wall deflections and ground surface settlements in deep excavations.Arabian Journal of Geosciences, 8(5): 3055-3063.
[9] Dong, Y., Burd, H., Houlsby, G., Houb, Y. (2014). Advanced finite element analysis of a complex deep excavation case history in Shanghai, Frontiers of Structural and Civil Engineering, 8(1): 93–100
[10] Viswanath, B., Krishna, A., Padmashree, M. (2014). Numerical analysis of influence of deep excavation on nearby existing tunnel, International Journal of Research in Engineering and Technology, 63(6): 120-124.
[11] Mortezaei, A. (2013) Plastic hinge length of RC columns considering soil-structure interaction. Earthquakes and Structures, 5(6): 679-702.
[12] SAP2000, Integrated software for Structural analysis & design, Computers & structures, Inc., Berkeley, California, USA, V. 18.1.1.
[13] Federal Emergency Management Agency,  Pre-standard and Commentary for the Seismic Rehabilitation of Building: FEMA-356.(2000)
[14] Iranian code of practice for seismic resistant design of buildings (2014). Standard no. 2800, 4th edition.
[15] Baker JW. (2007). Quantitative classification of near-fault ground motions using wavelet analysis, Bulletin of the Seismological Society of America, 97(5):1486–1501.
[16] HoseiniVaez, S.R., Sharbatdar, M. K., Amiri, G. G., Naderpour, H., &Kheyroddin, A. (2013). Dominant pulse simulation of near fault ground motions. Earthquake Engineering and Engineering Vibration, 12(2), 267-278.
[17] Kheyroddin, A. and Mortezaei, A. (2008). The Effect of Element Size and Plastic Hinge Characteristics on Nonlinear Analysis of RC Frames.Iranian Journal of Science & Technology, Transaction B, Engineering, 32(B5): 451-470.