Evaluation of soil–foundation–structure interaction effects on seismic response demands of multi-story MRF buildings on raft foundations

Raheem, Shehata E. Abdel; Ahmed, Mohamed M.; Alazrak, Tarek M.A.

doi:10.1007/s40091-014-0078-x

Cited by 56 publications

(19 citation statements)

References 14 publications

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“…[11] [12] and previous studies[5] [22] [27]. Furthermore, this study indicates that the drift, P-Δ effect and Story shear vary along the height of building from bottom to top stories differently.…”

supporting

confidence: 61%

“…In addition to the direct method of modelling, for evaluating the seismic response of reinforced concrete multi-story buildings with raft foundation on soft soil, the underneath soil is modeled by Winkler spring approach with equivalent static stiffness based on soil modulus of elasticity [3] [27]. For same soft soil used in direct method with shear velocity of V s = 150 m/s., equivalent static stiffness for different direction vibration mode, the soil spring stiffness can be calculated using Gazetas 1991 [36] expressions shown in Equations (7a) to (7c).…”

Section: Winkler Spring Methodsmentioning

confidence: 99%

“…Using direct half space method, the base soil modelled together structure using 3D solid element[22] and 2D plane strain shell soil element[3] [23][24] [25][26]. Also, SSI is modelled using Winkler spring element[27] and Viscous Transmitting boundary method[25] [28]. In addition full 3D direct method for arch bridge analysis is made by[29].…”

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confidence: 99%

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Dynamic Analysis of Soil Structure Interaction Effect on Multi Story RC Frame

Kabtamu¹,

Gang²,

Chen³

2018

OJCE

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In this study dynamic analysis of Soil Structure Interaction (SSI) effect on multi story reinforced concrete (RC) frame founded on soft soil (flexible base) is made and compared with fixed base. Two model 2D RC frames with 7 and 12 story are selected for analysis. Winkler Spring and half space direct method models are used for flexible base for the frames founded on two types of soft soils with shear velocity Vs < 150 m/s Asper Seismic Codes of Chinese GB50011-2010 Soil IV and Ethiopian ES8-2015 soil D. The frames are subjected to strong ground motion matched to response spectrums of soft soil of Chinese GB50011-2010 and Ethiopian ES8-2015 for linear time history analysis. The dynamic analysis result shows Spring and Fixed base mass participation 90% reaches in 2 or 3 modes but in direct method 11 to 30 modes for story 12 and 7 respectively. However, both flexible base models have bigger fundamental period of vibration and inter story drift but smaller base shear than fixed base. In addition, within the flexible base models the inter-story drift, second order effect (P-Δ) and Story shear distribution are different along the height of frames. The spring model shows larger Story drift and second order effect (P-Δ) at the bottom of Story for both soft soils types. On the other hand, half space direct method model indicates value reverse to spring model; it gives bigger Story drift and P-Δ effect in the top stories than fixed base. Finally, this study concludes that base shear reduction due to SSI may not be always beneficial. Because the gravity load is constant in both fixed and flexible bases that cause bigger P-Δ effect at the bottom stories due to increase, inter story drift and decrease story shear in flexible base.

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supporting

confidence: 61%

Section: Winkler Spring Methodsmentioning

confidence: 99%

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Dynamic Analysis of Soil Structure Interaction Effect on Multi Story RC Frame

Kabtamu¹,

Gang²,

Chen³

2018

OJCE

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“…In recent years, shaking table tests on the dynamic soil-structure interaction system have been investigated by many researchers. [26][27][28][29][30][31][32] Biondi et al [30] performed tests on a physical model consisting of a Leighton Buzzard sand deposit and a one-story steel model structure. The testing results Two maximum permissible horizontal direction accelerations of the shaking table are 1.2 and 0.8 g, and the maximum vertical acceleration is 0.7 g, where g is the gravitational acceleration.…”

Section: Discussionmentioning

confidence: 99%

Shaking table tests of RC frame structure across the earth fissure under earthquake

Xiong

Chen

Zhang

et al. 2018

Structural Design Tall Build

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showed that the performance of the soil-structure system was influenced by the frequency and amplitude of the input motion and the soil nonlinear behavior. Chen et al. [32] conducted a series of shaking table tests to investigate the effect of pulse-like ground motion on a multistory subway station.The testing results indicated that the pulse-like ground motion increased the dynamic responses of the subway station and the surrounding soils mainly due to its inherent rich low-frequency component and high energy absorption. However, on the basis of the author's knowledge, no research was found in the literature on shaking table test of RC frame structure across the earth fissure considering soil-structure interaction.In this paper, a series of shaking table tests were conducted aimed at understanding the seismic response of RC frame structure across the earth fissure. The earth fissure considered in this paper was referred to the earth fissure of Northwestern University-Northwestern Polytechnical University (f 4 ). The seismic performance of the RC frame structure under three earthquake motion records was evaluated and compared. 2 | EXPERIMENTAL PROGRAM 2.1 | Characteristics of the shaking table The shaking table tests were carried out at the Key Laboratory of Structure and Earthquake Resistance in Civil Engineering, Xi'an University of Architecture and Technology. The shaking table has an area of 4 m × 4 m and can produce three-dimensional, six-degree-of-freedom motions.FIGURE 2 The crack of the City Wall, Xi'an FIGURE 1 The crack of Tang Yan Road, Xi'an 2 of 15 XIONG ET AL. Zhongming Xiong is a professor of Department of Civil Engineering, Xi'an University of Architecture and Technology. His research interests are earthquake engineering and soil-structure interactions. Xuan Chen is a PhD student of Department of Civil Engineering, Xi'an University of Architecture and Technology. His research focuses on soil-structure interactions. Chao Zhang is a PhD student of Department of Civil Engineering, Xi'an University of Architecture and Technology. His research focuses on earthquake engineering. Xiaopeng Huo is a PhD student of Department of Civil Engineering, Xi'an University of Architecture and Technology. His research focuses on seismic design of building structures.

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“…[ 1 ], Shehata et al . [ 2 ], Dhileep et al [ 3 ], Mylokanis and Gazetas [ 4 ], Yue and Wang [ 5 ], Tena-Colunga [ 6 ], Ruiz,[ 8 ], etc. to study SSI's effects.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Dynamic Behaviour of Midrise Frame Structures Sitting on Silty Sandy Soil

Ismail¹,

Kaddah²,

Raphaël³

2020

TOCIEJ

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Background: Midrise 5 to 15 storeys frame structures sitting on soft soils are susceptible to damage induced by seismic events. The level of damage is related to the interaction between the structure, foundation and soil called Soil Structure Interaction (SSI). If the level of ground acceleration is low, the wave gets amplified putting the structure at risk of collapse. Objective and Methods: Concerns about SSI have motivated several researchers to investigate the seismic behaviour of structures rested on cohesive and cohesionless soils. The objective of the work presented in this paper is to evaluate the effects of several parameters on the seismic soil structure interaction behaviour of midrise structures sitting on silty sandy soil. Using ABAQUS, reliable 3D models of 5 to 15 storeys midrise concrete frame structures rested on raft foundation were built. The effects of the structure’s number of storeys, raft size and thickness were explored for different column sizes. Fixed-based structures which capture the model adopted in seismic codes and flexible-based structures were hit at the bottom by El-Centro (1940) and Northridge (1994) earthquakes. Results and Conclusion: The results, presented in terms of storey lateral deflection, inter-storey drift, shear force, foundation rocking and response spectrum showed the important contribution of SSI effects on the behaviour of the midrise structures. The model analyses indicated that column size strongly affects the behaviour of flexible structures. Let N be the structure number of storeys and C the column size. The results showed that in terms of storey lateral deflection and levelling shear force, for column sizes C 0.5 X 0.5 m, SSI was detrimental to structures with 10 ≤ N ≤ 15 and beneficial to structures with 5 ≤ N <10. Increasing the column size to C 0.5 X 1 m showed that SSI became detrimental for structures with 10 < N ≤ 15 under El-Centro (1940) and for structures with 7≤ N ≤ 15 under Northridge (1994), and beneficial for structures with 5 ≤ N ≤ 10 under El-Centro (1940) and for structures with 5 ≤ N < 7 under Northridge (1994). The FE results showed that even though base shear increased with raft size, lateral deflections were amplified for C 0.5 X 0.5 m S15 structures and attenuated for C 0.5 X 1 m S15 structures. However, the seismic response of S15 structures was slightly affected by the variation in raft thickness under both column sizes. Finally, the paper includes a discussion and evaluation of the contribution of inertial and kinematic effects, including soil types used on the simulated numerical models’ seismic responses.

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Evaluation of soil–foundation–structure interaction effects on seismic response demands of multi-story MRF buildings on raft foundations

Cited by 56 publications

References 14 publications

Dynamic Analysis of Soil Structure Interaction Effect on Multi Story RC Frame

Dynamic Analysis of Soil Structure Interaction Effect on Multi Story RC Frame

Shaking table tests of RC frame structure across the earth fissure under earthquake

Assessing the Dynamic Behaviour of Midrise Frame Structures Sitting on Silty Sandy Soil

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