Shake-Table Studies of a Four-Span Reinforced Concrete Bridge

Saiidi, M. Saiid; Vosooghi, Ashkan; Nelson, Robert B.

doi:10.1061/(asce)st.1943-541x.0000790

Cited by 52 publications

(56 citation statements)

References 4 publications

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“…This study compares the simulation results obtained by using different methods with the measured response of a 4-span reinforced concrete bridge (1/4-scale) model tested by Saiidi et al [1]. The benchmark shake table tests concern a straight continuous post-tensioned deck supported by three 2-column bents and two abutment seats.…”

Section: Methodsmentioning

confidence: 99%

“…the stiffness eccentricity and the multi-support excitation, the frictional deck-abutment contact forces (and the torsional moment they produce) were identified [1] as the main reason of the deck rotation. The present study uses the experimental data from [1] to validate a nonsmooth dynamics simulation and offer insight on the pounding-induced deck rotation. In this context, this study extends the nonsmooth dynamics framework proposed previously [8], [9], [10] to deal with the multi-support excitation, the inelastic behavior of concrete piers, and the continuous frictional contact of a multibody system.…”

Section: Introductionmentioning

confidence: 99%

“…In this context, this study extends the nonsmooth dynamics framework proposed previously [8], [9], [10] to deal with the multi-support excitation, the inelastic behavior of concrete piers, and the continuous frictional contact of a multibody system. Finally, the present paper compares the nonsmooth approach with a conventional gap element (compliance) approach with respect to their ability to predict the observed deck response from [1]. …”

Section: Introductionmentioning

confidence: 99%

“…If |η| > 1, both a skew (α > 0) and a straight (α = 0) bridge will tend to rotate after deck-abutment impact, e.g., in Figure 1 (a) and (b) respectively. Saiidi et al [1], performed large-scale shake table tests of a deck-abutment system and reported substantial, although unexpected, in-plane rotations of the deck, even though the bridge was straight. Among all potential rotation mechanisms, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Among all potential rotation mechanisms, e.g. the stiffness eccentricity and the multi-support excitation, the frictional deck-abutment contact forces (and the torsional moment they produce) were identified [1] as the main reason of the deck rotation. The present study uses the experimental data from [1] to validate a nonsmooth dynamics simulation and offer insight on the pounding-induced deck rotation.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Nonsmooth Seismic Response Analysis of a Benchmark Straight Bridge With Deck-Abutment Impact-Induced Rotation

Shi¹,

Dimitrakopoulos²

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nonsmooth Seismic Response Analysis of a Benchmark Straight Bridge With Deck-Abutment Impact-Induced Rotation

Shi¹,

Dimitrakopoulos²

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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SHM‐integrated bridge reliability estimation using multivariate stochastic processes

Feng

Soyöz

2014

Earthq Engng Struct Dyn

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SUMMARYDetermination of response characteristics using probabilistic approaches is essential to deal with high level of load and resistance uncertainties in civil engineering structures. Multi-span bridges present a significant problem regarding the varying nature of seismic loads on different bridge piers. With an emphasis on comparison of multi-support excitation with the conventional uniform excitation, this paper aims at providing a framework to evaluate probabilistic seismic response and estimate reliability of bridges under multi-support excitations simulated by multivariate stochastic processes. Moreover, the framework integrates the experimental data of a multi-support seismic shaking table test of a multi-span bridge structure as well as structural health monitoring (SHM) findings based on vibration measurements. The results demonstrate the importance of the multivariate stochastic processes, therefore, multi-support excitation, on estimating seismic behavior of multi-span bridges. Furthermore, this study proves the significance of structural parameter updating with respect to the evaluation of structural reliability. It is observed that the difference between the SHM-integrated and the conventional reliability estimation results vary according to the change in bedrock conditions.

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Nonsmooth dynamics prediction of measured bridge response involving deck‐abutment pounding

Shi

Dimitrakopoulos

2017

Earthq Engng Struct Dyn

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Summary Earthquake‐induced deck‐abutment contact alters the boundary conditions at the deck level and might activate a different mechanical system than the one assumed during the design of the bridge. Occasionally this discrepancy between the assumed and the actual seismic behavior has detrimental consequences, for example, pier damage, deck unseating, or even collapse. Recently, an insightful shake‐table testing of a scaled deck‐abutment bridge model , showed unexpected in‐plane rotations even though the deck was straight. These contact‐induced rotations produced significant residual displacements and damage to the piers and the bents. The present paper utilizes that experimental data to examine the validity and the limitations of a proposed nonsmooth dynamic analysis framework. The results show that the proposed approach satisfactorily captures the planar rigid‐body dynamics of the deck which is characterized by deck‐abutment contact. The analysis brings forward the role of friction on the physical mechanism behind the rotation of the deck, and underlines the importance of considering the frictional contact forces during deck‐abutment interaction even for straight bridges, which typically are neglected. Finally, the paper investigates the sensitivity of the rotation with respect to macroscopic contact parameters (i.e., the coefficient of friction and the coefficient of restitution). Copyright © 2017 John Wiley & Sons, Ltd.

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Shake-Table Studies of a Four-Span Reinforced Concrete Bridge

Cited by 52 publications

References 4 publications

Nonsmooth Seismic Response Analysis of a Benchmark Straight Bridge With Deck-Abutment Impact-Induced Rotation

Nonsmooth Seismic Response Analysis of a Benchmark Straight Bridge With Deck-Abutment Impact-Induced Rotation

SHM‐integrated bridge reliability estimation using multivariate stochastic processes

Nonsmooth dynamics prediction of measured bridge response involving deck‐abutment pounding

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