Static soil culvert interaction the effect of box culvert geometric configurations and soil properties

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

doi:10.1016/j.compgeo.2015.05.005

Cited by 38 publications

(12 citation statements)

References 11 publications

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“…It is important to note that the BM dy /BM st ratio can be positive or negative. Abuhajar (2013) and Abuhajar et al (2015a) presented a step-bystep procedure for the static design guidelines of box culverts. In that procedure, the SCI F e factors are determined based on the H/Bc and (or) t/Bc ratios.…”

Section: Static and Seismic Bending Moment Design Observationsmentioning

confidence: 99%

Seismic soil–culvert interaction

2015

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Box culverts may be constructed in active seismic areas, where ground shaking or ground failures can impose considerable earth pressures on them. In this study, the seismic response of box culverts was investigated experimentally and numerically. A series of scaled centrifuge tests was performed and subjected to three different earthquake signals, with different amplitudes and frequencies. Two values of culvert wall thickness and two values of sand relative density were considered in the experimental program. Experimental results are presented in terms of comparisons of seismic bending moments. These results were used to calibrate and verify two-dimensional numerical models developed using the computer program FLAC. The verified models were then used to investigate the effect of earthquake intensity and frequency, height of soil cover, and culvert thickness on the seismic bending moments for the different culvert sections. Based on the analysis results, charts are presented to aid in the seismic design of box culverts.Key words: soil-culvert interaction, box culvert, Nevada sand, centrifuge modeling, numerical modeling, earthquakes. Résumé :Il arrive que des ponceaux rectangulaires soient construits dans des régions sismiques actives, où des tremblements ou des ruptures du sol peuvent générer des pressions des terres considérables sur ceux-ci. Dans le contexte de cette étude, on a fait une recherche expérimentale et numérique de la réponse sismique. On a effectué une série d'essais au centrifuge à l'échelle et soumise à trois signaux sismiques différents, d'amplitudes et de fréquences distinctes. On a tenu compte de deux valeurs d'épaisseur du ponceau et de deux valeurs de la densité relative du sable dans le cadre du programme expérimental. Les résultats expérimentaux sont illustrés par des comparaisons des moments fléchissants sismiques. Les résultats expérimentaux ont servi à calibrer et à vérifier les modèles numériques à deux dimensions élaborés à l'aide du logiciel FLAC. On a ensuite utilisé les modèles vérifiés dans le but d'étudier l'effet de l'intensité et de la fréquence des tremblements de terre, de la hauteur de la couche de sol et de l'épaisseur du ponceau sur les moments fléchissants sismiques relativement aux différentes sections du ponceau. En se fondant sur les résultats des analyses, on présente des diagrammes servant à la conception parasismique des ponceaux rectangulaires. [Traduit par la Rédaction] Mots-clés : interaction sol-ponceau, ponceau rectangulaire, sable du Nevada, modélisation par centrifuge, modélisation numérique, tremblements de terre.

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Section: Static and Seismic Bending Moment Design Observationsmentioning

confidence: 99%

Seismic soil–culvert interaction

2015

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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%

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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“…In the study by Maximos et al [18], structural properties and fatigue behaviour of BCs under cyclic loads were experimentally investigated, which indicated that the fatigue of reinforced concrete BC had the least effect, and some amendments to fatigue regulations of the AASHTO standard were recommended. Abuhajar et al [19] studied factors that had an effect on soil arching by conducting experimental and analytical research studies. In addition to soil fill height, they determined that soil arching depended on culvert thickness, elastic modulus of soil, and position ratio.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Numerical Simulation on Failure Process of Reinforced Concrete Box Culvert

Gong

Tan

et al. 2020

Advances in Civil Engineering

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Culvert is an important part of roads whose healthy operation is related to the efficiency and safety of road transportation. Therefore, it is very important to evaluate the safety of culvert structure by load test. Four types of prefabricated reinforced concrete box culverts (integral BC, round hinged BC, flat seam BC, and mortise BC) were designed in this paper. By designing a scale model test, the sensor system was used to test the mechanical properties of BC, which included dial indicators, strain gauges, and a pressure sensor. The finite element analysis based on material nonlinearity and contact nonlinearity of round hinged BC and integral BC was carried out. After validating the finite element models, mechanical properties of reinforcement and concrete of BCs were analyzed. The experimental results show that the failure mode of BC was tensile failure of concrete at the bottom of top slab under bending action, and integral BC had the maximum carrying capacity. The contact behaviour of sliding and rotating at hinge joints caused the first principal tensile stress of concrete at the internal surface of the side wall below hinge joints.

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Static soil culvert interaction the effect of box culvert geometric configurations and soil properties

Cited by 38 publications

References 11 publications

Seismic soil–culvert interaction

Seismic soil–culvert interaction

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

Experimental Study and Numerical Simulation on Failure Process of Reinforced Concrete Box Culvert

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