Performance of abutment–backfill system under thermal variations in integral bridges built on clay

Dicleli, Murat; Albhaisi, Suhail

doi:10.1016/j.engstruct.2004.02.014

Cited by 29 publications

(23 citation statements)

References 7 publications

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“…The reason of forming a trapezoid distribution is that the horizontal movement of the bottom of integral abutment is influenced by the constraint of steel H-pile when abutment is under the large displacement load, which reduces the horizontal deformation of the abutment and thus reduces the earth pressure. This trapezoid distribution is also consistent with the results of Dicleli [33]. In Figure 11c,d, the earth pressure at horizontal distances of 0.6H and 1.4H from the back of the abutment is triangular under different displacements, which indicates that the pile has little influence on the distribution of earth pressure when the soil is far away from the abutment.…”

Section: Distribution Along the Height Of Abutmentsupporting

confidence: 88%

Experiment on Interaction of Abutment, Steel H-Pile and Soil in Integral Abutment Jointless Bridges (IAJBs) under Low-Cycle Pseudo-Static Displacement Loads

et al. 2020

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Soil-abutment or soil-pile interactions under cyclic static loads have been widely studied in integral abutment jointless bridges (IAJBs). However, the IAJB has the combinational interaction of soil-abutment and soil-pile, and the soil-abutment-pile interaction is lack of comprehensively study. Therefore, a reciprocating low-cycle pseudo-static test was carried out under an cyclic horizontal displacement load (DL) to gain insight into the mechanical behavior of the soil-abutment-pile system. Test results indicate that the earth pressure of backfill behind abutment has the ratcheting effect, which induced a large earth pressure. The soil-abutment-pile system has a favorable energy dissipation capacity and seismic behavior with relatively large equivalent viscous damping. The accumulative horizontal deformation in pile will be occurred by the effect of abutment and unbalance soil pressure of backfill. The test shows that the maximum horizontal deformation of pile occurs in the pile depth of 1.0b~3.0b of pile body rather than at the pile head due to the accumulative deformation of pile, which is significantly different from those of previous test results of soil-pile interaction. The time-history curve for abutment is relatively symmetrical and its accumulative deformation is small. However, the time-history curve of pile is asymmetrical and its accumulative deformation is dramatically large. The traditional theory of deformation applies only to the calculation of noncumulative deformation of pile, and the influence of accumulative deformation should be considered in practical engineering. A significant difference of inclinations in the positive and negative directions increases when the displacement load is relatively large. The rotation of abutment when bridge expands is larger than that when bridge contracts due to earth pressure of backfill.The specimen design was based on an practical IAJB in Fujian Province, China. The total length of the bridge is 136 m, including four 30-m-long spans and two 8-m-long approach slabs. The thickness (longitudinal direction of bridge) and width (transverse direction of bridge) of abutment for one supported pile are 1.8 m and 2.12 m, respectively. The height of abutment (vertical direction) including girder and pile cap is 3.25 m. Four piles supported the abutment. The pile with the cross section of 0.7 m × 0.5 m was oriented in the weak axis under longitudinal bridge movement.Considering the limitations of test equipment and Lab condition, the geometric scale ratio of the specimen was selected to be 0.31. Figure 1 shows the dimensions of the specimen. The height of specimen is 3.90 m, as shown in Figure 1a. Figure 1b,c show the dimensions of cross section of the abutment and steel H-pile. In Figure 1, the height of abutment (H) is 1000 mm. The thickness (T) and width (W) of scaled abutment in the transverse and longitudinal directions are 560 mm and 660 m, respectively. The cross-sectional widths of scaled pile (h and b) along the strong and weak axes are 217 mm and 155 mm, resp...

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Section: Distribution Along the Height Of Abutmentsupporting

confidence: 88%

Experiment on Interaction of Abutment, Steel H-Pile and Soil in Integral Abutment Jointless Bridges (IAJBs) under Low-Cycle Pseudo-Static Displacement Loads

et al. 2020

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“…The daily and seasonal variations of temperature result in thermal expansion and contraction of deck (Arsoy 2000;Duncan, Arsoy 2003;Kim, Laman 2010a). This, in turn, results in imposition of cyclic horizontal displacements to the backfill soil of the abutments (Darley et al 1998;Dicleli, Albhaisi 2004;Hoppe, Gomez 1996). Figure 1 shows imposition of cyclic movement to the integral bridge deck to the wall abutment.…”

Section: Introductionmentioning

confidence: 96%

“…Figure 1 shows imposition of cyclic movement to the integral bridge deck to the wall abutment. If the ambient temperature and coefficient of thermal expansion of the bridge are δ TEB and α respectively, the change in the length of the bridge, d o , can be calculated as (Dicleli, Albhaisi 2004;Emerson 1977): .…”

Section: Introductionmentioning

confidence: 99%

An Investigation on the Effect of Cyclic Displacement on the Integral Bridge Abutment

Movahedifar

Bolouri-Bazaz

2014

Journal of Civil Engineering and Management

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The integral bridge abutment, as a special type of retaining wall, is subject to cyclic displacement, which is due to the daily and seasonal temperature variations. The frame of this type of bridges is rigid and jointless. This requires that the slab of the bridge to be longitudinally continuous without expansion joints. This causes cyclic displacement to be imposed to the backfill material of integral bridge abutment. It should be pointed out that the omission of expansion joints helps to provide a fluent traffic and a reduction in maintenance and repair of the bridges. To investigate the impact of cyclic displacement on the loose backfill soil behaviour, an innovative laboratory retaining wall model has been designed and constructed to imitate the cyclic behaviour of backfill granular material. In addition, a numerical model, based on finite element method, has been developed to interpret the experimental results. This model was calibrated using the laboratory test data. The results indicate that the passive pressure, except for low amplitude displacement, escalates with progressive number of cycles and its distribution is not linear, which is due to the forming arch.

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“…Thermal behavior of soil, in particular the thermal resistivity of soil and the moisture migration in soil induced by a thermal gradient, is important in many agricultural and geotechnical applications (DeVries 1963;Hanna et al 1993;Dicleli and Albhaisi 2004;Fernandez et al 2005;dos Santos and Mendes 2005). The thermal resistivity of soil surrounding a hot buried object (usually a high electrical loadcarrying capacity underground cable or other underground conductor) can impose significant restrictions on its electrical load-carrying capability.…”

Section: Introductionmentioning

confidence: 99%

Thermal Resistivity and Moisture Migration of Soil and Cable Trench Backfill

Yeung

Morris²

2012

GeoCongress 2012

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There are many innovative applications of thermal properties of soil and backfill, such as geothermal cooling and heating systems, backfilling of high-voltage cable, etc., being developed. Therefore, there is a need to develop a better understanding of the thermal behavior of soil and backfill. The thermal resistivity and moisture migration behavior of a number of soils including those frequently used for high-voltage cable backfill have been studied in laboratory-scale and field-scale experiments, so as to evaluate their suitability as a backfill material. Thermal resistivity of small soil specimens was measured in the laboratory using a probe. Moreover, compaction mold thermal moisture migration tests were carried out for larger specimens in the laboratory. A full-scale field test was performed by means of a simulated cable installation. The results indicate in general that well-graded granular materials have the most desirable thermal behavior, and poorly graded soils (especially granular and coarse soils) have the least desirable thermal behavior, in terms of thermal resistivity and moisture migration driven by a thermal gradient.

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Performance of abutment–backfill system under thermal variations in integral bridges built on clay

Cited by 29 publications

References 7 publications

Experiment on Interaction of Abutment, Steel H-Pile and Soil in Integral Abutment Jointless Bridges (IAJBs) under Low-Cycle Pseudo-Static Displacement Loads

Experiment on Interaction of Abutment, Steel H-Pile and Soil in Integral Abutment Jointless Bridges (IAJBs) under Low-Cycle Pseudo-Static Displacement Loads

An Investigation on the Effect of Cyclic Displacement on the Integral Bridge Abutment

Thermal Resistivity and Moisture Migration of Soil and Cable Trench Backfill

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