An unconventional restraining system for limiting the seismic movements of isolated bridges

Mitoulis, Stergios A.; Tegos, Ioannis A.

doi:10.1016/j.engstruct.2009.12.036

Cited by 16 publications

(6 citation statements)

References 14 publications

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“…The answer to the question of whether such innovative solutions can exist is affirmative, but these are not expected to be conventional. These solutions are associated, on a case-bycase basis, either with the exploitation of the two abutments [10,11], or with the exploitation of the stiffness of the approach embankments at the ends of the bridge [12,13], or by anchoring the deck to the ends of adjacent tunnels [14]. This exploitation is possible through the extension of the deck slab on either side of the bridge, and with its connection to one of the aforementioned members, depending on the case [15,16].…”

Section: Capabilities Of Innovations On Earthquake-resistant Bridgesmentioning

confidence: 99%

The Significance of Innovations on the Structural System When Selecting the Construction Method of Earthquake-Resistant Bridges

Tegos¹,

Markogiannaki²

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The present paper attempts to demonstrate the great importance of innovative interventions οn the structural system of earthquake-resistant bridges. Τhe type of structural system affects also the construction method which will be chosen. The problem of selecting the most appropriate among the five current bridge construction methods (Cast-in-place, Precast I-Girder, Incremental Launching, Balanced Cantilever, Advanced Shoring method) is the most creative part of the decision-making process related to the construction of a bridge project. Seven compliance criteria are taken into account in this study, namely safety, economy, durability, serviceability, construction speed, aesthetics and environmental harmonization. The large number of criteria leads to the use of Multicriteria Analysis, and specifically of two Multicriteria methods: AHP and PROMETHEE. Certain innovative interventions in bridge design are selected and presented, all of them having features of "Egg of Columbus" solutions. Afterwards they are compared with some conventional construction methods, using a double Case study, from which interesting conclusions are drawn. The study does not result simply in the subjective predominance of one method, but in the hierarchy of all the respective alternative construction methods, followed by a specific score for each one of them. To this end, the opinions of distinguished experts on bridges are utilized through suitable questionnaires.

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Section: Capabilities Of Innovations On Earthquake-resistant Bridgesmentioning

confidence: 99%

The Significance of Innovations on the Structural System When Selecting the Construction Method of Earthquake-Resistant Bridges

Tegos¹,

Markogiannaki²

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…They improve aesthetics and earthquake resistance compared to traditional systems with expansion joints, bearings and other structural releases which permit expansion/contraction due to thermal actions, creep and shrinkage. The design of bridges has to accommodate both serviceability and earthquake resistance, which are conflicting components of the same problem and they impose opposite design requirements [1].…”

Section: Introductionmentioning

confidence: 99%

A Novel Mechanism for Restraining Seismic Actions in Ductile Bridges: Analytical Modeling and Experimental Verification

Pilitsis¹,

Papanikolaou²,

Tegos³

et al. 2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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In the present study, a mechanism for restraining seismic actions on ductile bridges is suggested and verified analytically and experimentally. The mechanism consists of the wall abutment which is monolithically connected to the end of the deck and is rested either on elastomeric bearings on the pile cap or on the abutment foundation as a stopper of adequate width, based on the serviceability demands due to the deck length variation. Using the suggested mechanism, the restraining of seismic deformations is attained on both bridge directions, without any complications during serviceability states, also alleviating stresses in the end-spans due to a more favorable moment distribution. There are Code provisions which permit the computational analytical modeling of the system, however it was considered appropriate to further examine of the proposed mechanism experimentally. For this purpose, eight 1:3 scale specimens of the suggested mechanism were prepared. Four of them were designed for normal (large) shear ratios, while the other four were designed for small shear ratios. The specimens were subjected in cyclic loading and interesting results were observed regarding the three response indexes, namely, strength, stiffness and ductility.

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“…Recent studies [6][7] showed that the reduction in the demand can also be achieved by the abutment and backfill soil participation which contribute to the enhancement of the earthquake resistance of bridges. The advantages of this seismic participation are reflected on the construction cost of the bridge [8], as smaller pier cross-sections meet Code's requirements as well as bridge aesthetics.…”

Section: Introductionmentioning

confidence: 99%

Analytical and Experimental Investigation on the Seismic Efficiency of a New Restraining System for Limiting the Seismic Movements of the Bridge Deck

Tegou¹,

Tegos²

2014

Proceedings of the 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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An unconventional restraining system for limiting the seismic movements of isolated bridges

Cited by 16 publications

References 14 publications

The Significance of Innovations on the Structural System When Selecting the Construction Method of Earthquake-Resistant Bridges

The Significance of Innovations on the Structural System When Selecting the Construction Method of Earthquake-Resistant Bridges

A Novel Mechanism for Restraining Seismic Actions in Ductile Bridges: Analytical Modeling and Experimental Verification

Analytical and Experimental Investigation on the Seismic Efficiency of a New Restraining System for Limiting the Seismic Movements of the Bridge Deck

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