Experimental and numerical investigations of the effect of buried box culverts on earthquake excitation

Abuhajar, Osama; Naggar, Hesham El; Newson, Tim

doi:10.1016/j.soildyn.2015.07.015

Cited by 72 publications

(13 citation statements)

References 7 publications

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“…9 plots the displacement time histories of soils at the bottom (A15), a depth of 71 cm (A6) and the soil surface (A19) in the free field test under the input seismic acceleration of 0.1 g. It suggests that the displacement of the soils increases from the base to the ground surface. The result is consistent with reports of many other researchers [22][23][24]. Fig.…”

Section: Resultssupporting

confidence: 93%

Damping effects of different shock absorbing materials for tunnel under seismic loadings

Huang¹,

Wang²,

Zhou³

et al. 2019

J. vibroeng.

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Circular tunnels are widely used in infrastructure. Under the action of earthquakes, the destruction of circular tunnels will result in a large number of economic losses and casualties. Therefore, the study on shock absorption of tunnels is important. However, the research has not been sufficient on the effect of the damping layer on seismic response of a circular tunnel in sand. In this paper, the influence of the damping layer on the seismic response characteristics of circular tunnels in sand is studied by large-scale shaking table test. The actual El-centro wave is loaded to the model system in three directions during the tests. The input peak seismic acceleration values are 0.05 g, 0.1 g and 0.2 g. Then the effects of two different damping materials on the dynamic response characteristics of circular tunnels are analysed quantitatively. The test results show that the damping layer reduces the seismic response of the circular tunnel. The response accelerations of the tunnel bottom and crown without damping layer are greater than that with the damping layer, which indicates that damping layer absorbs the energy caused by the seismic motion. When the sponge rubber is used, the circular tunnel dynamic response is more attenuated than that with foam board. In conclusion, the shock absorbing layer can effectively reduce the seismic response of tunnel. As a result, the damage of the tunnel decreases under the earthquake. This study has clarified the isolation mechanism of the shock absorbing materials. It is recommended to use sponge rubber material as the shock absorbing layer.

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Section: Resultssupporting

confidence: 93%

Damping effects of different shock absorbing materials for tunnel under seismic loadings

Huang¹,

Wang²,

Zhou³

et al. 2019

J. vibroeng.

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“…But due to characteristics of soil during loading, unloading, and reloading process, and change compression loading to tensile loading in very short times, the crack on soil due to tensile loading and fatigue of soil cannot be explained same as which is presented in the literature, about crack and fatigue on metal [19][20][21]. e failure pattern and shear resistance of soil have been discussed using mathematical modeling techniques and numerical simulation [22][23][24][25][26][27], and the bearing capacity and effective stress have been changing with respect to soil foundation displacement.…”

Section: Numerical Analysis Discussion and Verification Of The Resultsmentioning

confidence: 99%

“…ere are special techniques in numerical simulation [6,14,22,26,28]. In the present study, cyclic graphs have been developed for understanding concrete footing displacement using ABAQUS which never has been reported in the literature.…”

Section: Numerical Analysis Discussion and Verification Of The Resultsmentioning

confidence: 99%

Seismic Resistance and Displacement Mechanism of the Concrete Footing

Namdar

Dong

2019

Shock and Vibration

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A realistic seismic simulation of the concrete footing has been made by using finite element method (FEM) software called ABAQUS. The effect of concrete footing embedment in soil on concrete footing-soil foundation interaction has numerically been simulated for considering displacement, stress, strain, and seismic acceleration load response at the base of a concrete footing. The results showed that the height of embedded concrete footing in soil foundation controls (i) mechanism and magnitude of lateral, vertical, and differential displacements of the concrete footing, (ii) strain energy, the acceleration load response, and stress paths, and (iii) concrete footing-soil foundation interaction. Compared with various theoretical and experimental results reported in the literature, the present study provides realistic seismic behavior of concrete footing-soil foundation interaction.

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“…Hashash 40 concluded that the racking deformation was the main cause of failure of underground structure. Abuhajar et al 41,42 . also demonstrated that the rocking effect was small in the study of buried box culverts.…”

Section: Methods Of Defining Idr Limitsmentioning

confidence: 96%

“…Hashash 40 concluded that the racking deformation was the main cause of failure of underground structure. Abuhajar et al 41,42 also demonstrated that the rocking effect was small in the study of buried box culverts. However, in line with recent centrifuge tests and numerical findings, Tsinidis 43 and Pitilakis 29 shown that the tunnel presented a complex racking-rocking response during shear shaking, and the behavior was quite effect by the tunnel stiffness.…”

Section: Methods Of Defining Idr Limitsmentioning

confidence: 97%

Interstory drift ratio associated with performance objectives for shallow‐buried multistory and span subway stations in inhomogeneous soil profiles

Jiang

Naggar

et al. 2020

Earthq Engng Struct Dyn

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The interstory drift ratios (IDRs) associated with the performance objectives for the underground structure are not well defined. In this paper, four levels of performance objectives are defined for shallow-buried subway station structure: operational, immediate occupancy, life safety, and collapse prevention. In order to develop IDRs corresponding to these performance objectives, 18 subway station structures were selected for this study. Pushover analyses were conducted using three-dimensional finite-element models considering two conditions of seismic loading: vertical and horizontal ground motions; and horizontal ground motion only. Shear-displacement capacity curves of the 18 subway station structures were obtained, and IDR limits were defined for each structure based on the relationship between the capacity curves and performance objective. Statistical analysis of the results demonstrated that the IDR limits considering the vertical ground motion (characterized by the same frequency with horizontal component) are smaller than that without consideration of the vertical ground motion. Based on these results, the IDR limit of 0.05%, 0.21%, 0.46%, and 0.72% is assigned for the four performance levels, respectively, for rectangular frame underground structures. The performance evaluation applied to Daikai station based on the proposed limits is found to be consistent with the actual postearthquake damage observations. The proposed limits of IDR could provide some guidance to the seismic design of underground structures, and could form the basis for developing appropriate performance limits for seismic provisions in design codes relevant to underground structures. K E Y W O R D S interstory drift ratio, performance objective, rectangular frame, underground structure, vertical ground motion 1 INTRODUCTION The performance-based seismic design (PBSD) approach intends to achieve defined performance objectives for the seismic design of the structure in a future earthquake. Federal Emergency Management Agency (FEMA) report FEMA-273, 1 FEMA-274 2 introduced the first PBSD procedure, which was aimed at seismic reinforcement of existing buildings, and

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Experimental and numerical investigations of the effect of buried box culverts on earthquake excitation

Cited by 72 publications

References 7 publications

Damping effects of different shock absorbing materials for tunnel under seismic loadings

Damping effects of different shock absorbing materials for tunnel under seismic loadings

Seismic Resistance and Displacement Mechanism of the Concrete Footing

Interstory drift ratio associated with performance objectives for shallow‐buried multistory and span subway stations in inhomogeneous soil profiles

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