Seismic design of bridge columns incorporating mechanical bar splices in plastic hinge regions

Tazarv, Mostafa; Saiidi, Mehdi S.

doi:10.1016/j.engstruct.2016.06.041

Cited by 93 publications

(44 citation statements)

References 6 publications

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“…There are different ways that may be envisioned to practically realize the coupling between parallel bars as examined in this paper. This may include, for example, coupling using magnetic attachments 32 , ultrasonic welding 33 , or mechanical couplers 34 . The choice of the specific coupling technique may depend on the nature of materials to be joined (e.g.…”

Section: Discussionmentioning

confidence: 99%

Emergent wave phenomena in coupled elastic bars: from extreme attenuation to realization of elastodynamic switches

Chen

Elbanna

2017

Sci Rep

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Metamaterials with acoustic and elastic band gaps are of great interest to scientists and engineers. Here, we introduce a novel mechanism for emergence of multiple band gaps with extreme attenuation by coupling continuous one-dimensional elastic structures. We show that it is possible to develop extreme attenuation at several frequencies from coupling two homogenous bars of different elastodynamic properties even though each bar individually possesses no such gaps. Moreover, if each bar is a composite on its own, multiple resonant band gaps appear in the compound system which do not exist in either bar. We verify our results by conducting numerical simulations for the elastodynamic response and show that the resonant gaps are efficient in attenuating wave propagation. Furthermore, we show that by carefully tailoring the properties of the coupled bars we may construct elastodynamic signal choppers. These results open a new gate for designing Metamaterial with unique wave modulation properties.

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Section: Discussionmentioning

confidence: 99%

Emergent wave phenomena in coupled elastic bars: from extreme attenuation to realization of elastodynamic switches

Chen

Elbanna

2017

Sci Rep

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“…The results show that grouting sleeves have local reinforcement effect on the conventional plastic hinge area, and the prestressing tendons showed better self-resetting ability in quasi-static tests. Haber et al (2014) and Tazarv and Saiidi (2016) carried out quasi-static tests on prefabricated piers connected by grouting sleeves alone. The test results display that the horizontal bearing capacity, ductility, and energy dissipation of prefabricated piers are very close to those of CIP piers, but the failure modes are different.…”

Section: Introductionmentioning

confidence: 99%

Seismic behaviors of precast assembled bridge columns connected with prestressed threaded steel bar: Experimental test and hysteretic model

Xie

Zhao

Yao

et al. 2020

Advances in Structural Engineering

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Three 1/10-scale bridge pier specimens were tested under quasi-static test. The specimens included two precast specimens (PC1 and PC2) and one cast-in-place reference specimen. The two precast bridge pier specimens were connected with prestressing threaded steel bar and steel flange at the connection between precast pier column and the foundation, and non-socket assembly scheme and socket assembly scheme are adopted, respectively. They were tested to verify the seismic performance of prefabricated piers connected by prestressed threaded steel bars and steel flanges and study which assembly scheme is better for non-socketed and socketed piers. The results show that the prefabricated pier with the combination of the prestressed threaded steel bars and steel flange has higher cracking load and smaller residual displacement, which indicates that it has good service performance and good self-resetting ability. Compared with the non-socket assembly scheme, the socket assembly scheme is superior due to its higher ductility, higher overall initial stiffness, and higher energy dissipation capacity. Therefore, the prefabricated assembled pier with the socket connection scheme of the combination of the prestressed threaded steel bars and steel flange has good service performance and seismic performance. After that, a hysteretic model for the precast assembled columns was proposed, which has a good agreement with the test results.

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“…As a result, the connections among various building elements are essential to the structural continuity and loading capacity (Xiang et al, 2016). Nowadays, mechanical connection (Haber et al, 2014; Lago et al, 2016; Tazarv and Saiidi, 2016a, 2016b), pocket connection (Belleri and Riva, 2008; Giovanni et al, 2011), socket connection (Germano et al, 2015; Haraldsson et al, 2013), and grouted connection (Alias et al, 2013; Buratti et al, 2014; Parks et al, 2016; Zheng, 1996) are the popular connections among precast concrete column and foundation. Among those connections, grouted connection is more popularly used for its easy applicability and large construction tolerances.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the seismic behavior of precast concrete column with grouted corrugated sleeves and debonded longitudinal reinforcements

Chen

Zhao

Ding

et al. 2019

Advances in Structural Engineering

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The seismic performance and the influence of debonded longitudinal reinforcements at the footing on the precast concrete columns connected with the embedded grouted corrugated sleeve were investigated experimentally in this research. Low cyclic loading tests were carried out on eight bending columns and four shear columns, considering the designed parameters of the partial debonding of the longitudinal reinforcements above the column–foundation interface, the axial load index, and the strength of the stirrups. Experimental results indicate that the partial debonding of the longitudinal reinforcements heavily influenced the damage spreading of the bending columns, but does not affect the damages of the shear columns. Compared to the columns without debonded longitudinal reinforcements, the seismic behaviors in terms of the ductility and energy dissipation can be improved clearly by the partial debonding of the longitudinal reinforcements for bending columns, but there was no clear improvement for shear columns. In addition, with the decrease of the axial load index or the increase of the strength of the stirrups, the seismic behaviors of the precast columns with the partial debonding of the longitudinal reinforcements are improved largely.

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Seismic design of bridge columns incorporating mechanical bar splices in plastic hinge regions

Cited by 93 publications

References 6 publications

Emergent wave phenomena in coupled elastic bars: from extreme attenuation to realization of elastodynamic switches

Emergent wave phenomena in coupled elastic bars: from extreme attenuation to realization of elastodynamic switches

Seismic behaviors of precast assembled bridge columns connected with prestressed threaded steel bar: Experimental test and hysteretic model

Experimental study on the seismic behavior of precast concrete column with grouted corrugated sleeves and debonded longitudinal reinforcements

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