Hysteretic Modeling of Unbonded Posttensioned Precast Segmental Bridge Columns with Circular Section Based on Cyclic Loading Test

Bu, Zhan-Yu; Ou, Yu‐Chen; Song, Jianwei; Lee, George C.

doi:10.1061/(asce)be.1943-5592.0000902

Cited by 27 publications

(8 citation statements)

References 12 publications

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“…The concept is based on the early work of Priestley and Tao, 9 Stanton et al, 10 and the PREcast Seismic Structural Systems (PRESSS) project. 11,12 Different names have been used for similar concepts: Damage Avoidance Design, 13 Controlled Rocking, [14][15][16][17][18][19] Self-Centering System, [20][21][22][23][24][25][26][27][28][29][30][31][32] Precast Hybrid Systems, [33][34][35][36][37] Hybrid Sliding-Rocking System, [38][39][40] Pre-or Post-tensioned Rocking, [41][42][43][44][45] and it has recently found its way to practice in New Zealand 46 and China. 47 The concept of restrained rocking leads to resilient systems, but still, the design moment of the foundation remains large.…”

Section: Introductionmentioning

confidence: 99%

“…The concept is based on the early work of Priestley and Tao, 9 Stanton et al., 10 and the PREcast Seismic Structural Systems (PRESSS) project 11,12 . Different names have been used for similar concepts: Damage Avoidance Design, 13 Controlled Rocking, 14–19 Self‐Centering System, 20–32 Precast Hybrid Systems, 33–37 Hybrid Sliding‐Rocking System, 38–40 Pre‐ or Post‐tensioned Rocking, 41–45 and it has recently found its way to practice in New Zealand 46 and China 47 …”

Section: Introductionmentioning

confidence: 99%

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Dimensionality reduction of the 3D inverted pendulum cylindrical oscillator and applications on sustainable seismic design of bridges

Vassiliou

Sieber

2021

Earthq Engng Struct Dyn

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The simplest 3D extension of Housner's planar rocking model is a rocking (wobbling) cylinder allowed to uplift and roll on its circumference, but constrained not to roll out of its initial position. The model is useful for the description of bridges that use rocking as a seismic isolation technique, in an effort to save material by reducing the design moment and the size of the foundations. This paper shows that describing wobbling motion in terms of displacements rather than rotations is more useful. It unveils that a remarkable property of planar rocking bodies extends to 3D motion: A small and a large wobbling cylinder of the same slenderness will sustain roughly equal top displacement, as long as they are not close to overturning. This allows for using the response of an infinitely large wobbling cylinder of slenderness α as a proxy to compute the response of all cylinders having the same slenderness, irrespectively of their size. Thus, the dimensionality of the problem is reduced by one. Moreover, this paper shows that the median wobbling response to sets of ground motions can be described as an approximate function of only two non-dimensional parameters, namely (𝑔 tan 𝛼∕𝑃𝐺𝐴, 𝑢∕𝑃𝐺𝐷)or (𝑔 tan 𝛼∕𝑃𝐺𝐴, 𝑢𝑃𝐺𝐴∕𝑃𝐺𝑉 2 ) where u is the top displacement of the wobbling body.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dimensionality reduction of the 3D inverted pendulum cylindrical oscillator and applications on sustainable seismic design of bridges

Vassiliou

Sieber

2021

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

show abstract

“…The above concept is based on the early work of Priestley and Tao, 1 Stanton et al., 2 and the PREcast Seismic Structural Systems (PRESSS) project 3,4 . Different names have been used for similar concepts: damage avoidance design, 5 controlled rocking, 6–13 self‐centering system, 14–24 precast hybrid systems, 25–29 hybrid sliding–rocking system, 30–33 pre‐ or post‐tensioned rocking, 34–36 and it has recently found its way to practice in New Zealand 37 and China 38 …”

Section: Introductionmentioning

confidence: 99%

“…The above concept is based on the early work of Priestley and Tao, 1 Stanton et al, 2 and the PREcast Seismic Structural Systems (PRESSS) project. 3,4 Different names have been used for similar concepts: damage avoidance design, 5 controlled rocking, [6][7][8][9][10][11][12][13] self-centering system, [14][15][16][17][18][19][20][21][22][23][24] precast hybrid systems, [25][26][27][28][29] hybrid sliding-rocking system, [30][31][32][33] pre-or posttensioned rocking, [34][35][36] and it has recently found its way to practice in New Zealand 37 and China. 38 Soviet engineers have been using prefabricated elements dried connected as a seismic isolation method for buildings as referred elsewhere.…”

Section: Introductionmentioning

confidence: 99%

Shaking table tests of a resilient bridge system with precast reinforced concrete columns equipped with springs

Manzo

Vassiliou

Mouzakis

et al. 2021

Earthq Engng Struct Dyn

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This paper presents the shake table test results of a novel system for the design of precast reinforced concrete bridges. The specimen comprises a slab and four precast columns. The connections are dry and the columns are connected to the slab by an ungrouted tendon. One of the tendon ends is anchored above the slab, in series with a stack of washer springs, while the other end is anchored at the bottom of the column. The addition of such a flexible restraining system increases the stability of the system, while keeping it relatively flexible allowing it to experience negative post‐uplift stiffness. It is a form of seismic isolation. Anchoring the tendon within the column, caps the design moment of the foundation, and reduces its size. One hundred and eighty‐one shake table tests were performed. The first 180 caused negligible damage to the specimen, mainly abrasion at the perimeter of the column top ends. Hence, the system proved resilient. The 181st excitation caused collapse, because the tendons unexpectedly failed at a load less than 50% of their capacity (provided by the manufacturer), due to the failure of their end socket. This highlights the importance of properly designing the tendons. The tests were used to statistically validate a rigid body model. The model performed reasonably well never underestimating the median displacement response of the center of mass of the slab by more than 30%. However, the model cannot predict the torsion rotation of the slab that was observed in the tests and is due to imperfections.

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“…Therefore, the use of prefabricated assemble piers has increased in recent years owing to the fast construction speed and slight traffic block (Billington et al, 2001; Zhou et al, 2017). Compared with conventional CIP piers, prefabricated piers have many inherent advantages, including not only higher construction speed, but also lower environmental impact and higher structural security (Bu et al, 2016).…”

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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Hysteretic Modeling of Unbonded Posttensioned Precast Segmental Bridge Columns with Circular Section Based on Cyclic Loading Test

Cited by 27 publications

References 12 publications

Dimensionality reduction of the 3D inverted pendulum cylindrical oscillator and applications on sustainable seismic design of bridges

Dimensionality reduction of the 3D inverted pendulum cylindrical oscillator and applications on sustainable seismic design of bridges

Shaking table tests of a resilient bridge system with precast reinforced concrete columns equipped with springs

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

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