Long-Term Behavior of Intregral Abutment Bridges

Lovell, Matthew D.

doi:10.5703/1288284314640

Cited by 13 publications

(16 citation statements)

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“…The displacement capacity was adopted from field test results conducted by Knoxville University, which is slightly less than 2 in. set by Frosch and Lovell (2011).…”

Section: Research Aims and Objectivesmentioning

confidence: 99%

“…Additionally, Frosch and Lovell (2011) tested an H-pile with spiral confining reinforcement surrounding the embedded portion and found that this configuration improved the lateral load capacity of the pile. The laboratory tests conducted by Frosch and Lovell (2011), in addition to experimental investigation carried by Talbott (2008) and Chovichien (2004), showed that pile-head displacements in the order of 2 in. could be accepted in integral abutment bridges.…”

Section: Thermal Effectmentioning

confidence: 99%

“…Where; : Initial lateral stiffness Esi (Gerimann et al, 1984;Haj-Najib, 2002), , : Generalized and ultimate soil resistance, respectively, : Shapes parameter (Greimann et al, 1984 and1986;Haj-Najib, 2002), , : Generalized and ultimate pile displacement, respectively. Greimann et al (1984 and (Frosch & Lovell, 2011 ) The f-z relationships was obtained using Equation 2.7, by substituting the initial vertical stiffness kv, vertical displacement z, and shear stress f instead of kh, y and p, respectively (Greimann et al, 1984 and. The f-z relationships describe the relationship between skin friction (force per unit length of the pile) and the relative vertical displacement between the pile and the soil, Table 2.3.…”

Section: = (28)mentioning

confidence: 99%

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Study of Horizontally Curved Slab-on-Steel I-Girder Bridges with Integral Abutments Under Thermal Loading

Abdrabbo¹

2021

Preprint

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Integral abutment bridges have started to become part of the construction industry worldwide. However, they present challenges arising from the monolithic connection between bridge deck and the abutment. Thermal loading induced by daily cycles superimposed on seasonal cycles result in complex soil-structure interaction. Due to uncertainties in integral abutment bridge performance, there is no consensus among different codes on the bridge maximum length limit. A parametric study was carried out, using SAP2000 software, to examine the behavior of horizontal curved concrete slap-on-steel Igirders, under the effect of thermal loading conditions (±65°c). The self-weight of the bridge was considered. Spatial variables, including abutment height, radius of curvature, bridge span length, stiffness of backfill and types of foundation soil, were considered. The numerical analysis results were used to drive equation relating abutment height and bridge span with the maximum bridge length limit, which produces 40 mm horizontal displacement on pile head.

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“…The displacement capacity was adopted from field test results conducted by Knoxville University, which is slightly less than 2 in. set by Frosch and Lovell (2011).…”

Section: Research Aims and Objectivesmentioning

confidence: 99%

Section: Thermal Effectmentioning

confidence: 99%

Section: = (28)mentioning

confidence: 99%

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Study of Horizontally Curved Slab-on-Steel I-Girder Bridges with Integral Abutments Under Thermal Loading

Abdrabbo¹

2021

Preprint

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“…This process can be seen in Figure II -11. However, Burke (2009) To take one example of specifications for maximum integral bridge length, see the figures for Indiana listed in Table II-1, as presented by Frosch and Lovell (2011). As previously explained, the basic difference between integral and conventional bridges is the inclusion of the superstructure, the substructure and the surrounding soil in a single structural model.…”

Section: Design Basis and Methodologymentioning

confidence: 99%

“…Figure III-7: Spectral acceleration in accordance with natural period and mode shape (Austin, 1996) Tables Table II-1: Indiana limitation for integral abutment bridges (Frosch & Lovell, 2011 (David & Forth, 2011) …”

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confidence: 99%

Behaviour of integral bridges under vertical and horizontal earthquake ground motion

Masrilayanti¹,

Weekes²

2014

Bridge Maintenance, Safety, Management and Life Extension

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Integral bridges are monolithic and are known to possess good earthquake resistance when founded on a stable soil. One important consideration is the relative displacements which can occur at the support points on structures where there is significant spacing between, i.e. bridges. Factors such as soil, foundation types etc. can all influence the dynamic response, and the stiffness of the bridge can influence how relative displacements affect the internal force actions within the structure. In this study, the effect of earthquakes on integral bridges built on several different soil types is examined, through computer simulation of an integral abutment bridge. The study is made based on Eurocode 8 recommendations, which provides data for different types of soil to be used for earthquake analysis. A symmetrical medium length integral bridge obtained from an existing structure is used for the analysis. Artificial EC8 spectrum compatible time histories (with a 0.35 g peak ground acceleration) are applied to the structure for a range of soil stiffnesses. In conjunction with this, both static and dynamic relative displacement studies are carried out to develop insight as to the significance or dominance of either dynamic or relative displacement effects.The final aim of this study is to propose a simplified approach for design/appraisal which can allow predictions of dynamic response based on the results of static relative displacement studies coupled with simple computer models, without having to resort to full nonlinear integration time-history analysis. Synthetic time histories for 5 different types of soil were created using Mathcad. The synthetic acceleration time history was validated using Seismospect (by Seismosoft). The time histories were then used to carry our full integration time history analyses in ANSYS (engineering simulation software) to simulate the dynamic response of the bridge.The results show that relative displacements play an important role in overall structural response of the integral bridge, compared to the pure dynamic response. The results also confirm that lower stiffness soils suffer a more detrimental effect of the earthquake compared to a soil of higher stiffness.

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