scholarly journals DEVELOPMENT OF HIGH-SEISMIC-PERFORMANCE REINFORCEMENT CONCRETE BRIDGE PIER WITH HIGH-PERFORMANCE PLASTIC HINGE

2008 ◽  
Vol 64 (2) ◽  
pp. 317-332 ◽  
Author(s):  
Shinichi YAMANOBE ◽  
Naoki SOGABE ◽  
Hirokazu IEMURA ◽  
Yoshikazu TAKAHASHI
Keyword(s):  
Seismic Performance ◽  
High Performance ◽  
Plastic Hinge ◽  
Bridge Pier ◽  
Concrete Bridge

Seismic performance of a bridge pier reinforced with titanium alloy bars

2021 ◽  
Author(s):  
Mahesh Acharya ◽  
Mustafa Mashal ◽  
Jared Cantrell
Keyword(s):  
Titanium Alloy ◽  
Cyclic Loading ◽  
Seismic Performance ◽  
Large Scale ◽  
Plastic Hinge ◽  
Bridge Pier ◽  
Bridge Piers ◽  
Structural Performance ◽  
Concrete Bridge ◽  
Hinge Zone

<p>The research in this paper focuses on the use of Titanium Alloy Bars (TiABs) in concrete bridge piers located in high seismic zones. The paper discusses a new bridge pier system that incorporates both seismic resiliency and durability concepts. A large-scale bridge pier, reinforced with TiABs and spiral, is tested under quasi-static cyclic loading protocol. The results are compared against a benchmark cast-in-place pier with normal rebars and spiral under the same loading protocol. Based on the testing results, the use of TiABs in concrete piers would reduce rebar congestion up to 50%, provide adequate ductility, and would result in reduced residual displacement following an earthquake. The pier reinforced with TiABs reached higher drift ratios compared to cast-in-place pier. Furthermore, smaller flexural cracks that are likely to appear in the plastic hinge zone during moderate earthquakes are not a major concern for structural performance and durability of bridge piers reinforced with TiABs.</p>

Seismic Performance of Bridge Pier with FRP Wrapping

2006 ◽  
Vol 326-328 ◽  
pp. 1717-1720 ◽  
Author(s):  
Hyung Joong Joo ◽  
Seung Sik Lee ◽  
Soon Jong Yoon ◽  
Joo Kyung Park ◽  
Sun Kyu Cho
Keyword(s):  
Seismic Performance ◽  
Loading Condition ◽  
Plastic Hinge ◽  
Seismic Loading ◽  
Concrete Cover ◽  
Bridge Pier ◽  
Concrete Bridge ◽  
Lap Splice ◽  
Ductile Behavior ◽  
Frp Wrapping

This paper presents the results of an experimental study on the seismic performance of reinforced concrete (RC) bridge piers wrapped with FRP at the lap-spliced region. It is well known that the FRP wrapping on the surface of concrete bridge pier can prevent concrete cover from spalling and it can reduce the slip displacement of lap-spliced longitudinal re-bars due to confinement. In order to develop the effective way of strengthening the concrete bridge pier with poor lap-spliced longitudinal re-bars, which is not designed under seismic design consideration, a series of pier test under seismic loading condition is conducted. As a result, FRP wrapped bridge pier under seismic loading exhibits ductile behavior with plastic deformation at lap-spliced region. Half-scaled six circular and nine square pier specimens were tested under uniform concentric axial compression and quasi-static lateral loading at the top of the pier. For the purpose of comparison, two piers without lap-splice and two piers with lap-splice were not wrapped with FRP and tested under same loading condition. Other experimental parameters were the height of FRP wrapping and the reinforcing method. The experimental results showed that the FRP wrapping could significantly increase ductility of piers with lap-spliced longitudinal re-bars at the potential plastic hinge region.

Plastic Hinge Analysis of Seismic Performance of High Bridge Pier

2012 ◽  
Vol 238 ◽  
pp. 765-768
Author(s):  
Rui Hong Gao ◽  
Rui Lin Chen ◽  
Su Gong Cao ◽  
Zhang Tang ◽  
Xin Qiang Xiao ◽  
...  
Keyword(s):  
Seismic Performance ◽  
Plastic Hinge ◽  
Buckling Load ◽  
Bridge Pier ◽  
Bridge Piers ◽  
Railway Bridge ◽  
Ansys Software ◽  
Plastic Hinges ◽  
Reinforced Concrete Bridge ◽  
Final Data

To analyze the second plastic hinge of high bridge pier formed in the earthquake and study the pier seismic performance, this paper takes the Kunming Slope Railway Bridge as an example. The simulation model was built by the elastic-plastic finite element ANSYS software. The buckling load of piers was calculated by buckling analysis capabilities of ANSYS software, a small enough initial offset given to the model, then the buckling load of piers put into the model. The deformation of non-linear model under the loads was calculated, the process was recorded that the reinforced concrete bridge piers initially yielding on the cross-section, continuously rotating around the neutral axis, and finally forming the eventually plastic hinges in certain parts of pier. The location of the plastic hinges can be inferred by final data of analysis software. By analyzing the calculated results, the seismic performance of the second plastic hinge in high bridge is studied.

Seismic Performance Analysis of a Continuous Girder Bridge with Precast Segmental Pier

2011 ◽  
Vol 250-253 ◽  
pp. 1966-1970 ◽  
Author(s):  
Ji Ping Ge
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Plastic Hinge ◽  
Bridge Columns ◽  
Concrete Bridge ◽  
Reinforced Concrete Bridge ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Plastic Hinge Method ◽  
Segmental Bridge

Based on available research results of precast segmental bridge pier, seismic performance of a continuous girder bridge with precast segmental bridge columns using match-cast dry joints was analyzed with the lumped plastic hinge method verified by experiment, the similarities and differences of seismic performance between the continuous girder bridge with precast segmental bridge columns and that of cast-in-placement reinforced concrete bridge columns were gained. Results show that the maximum displacement response of the continuous girder bridge with precast segmental bridge columns is bigger than that of the continuous girder bridge with cast-in-place reinforced concrete bridge columns. While for the residual displacement, the opposite is true. The reason is that the restoring force exists in the precast segmental bridge pier by the prestress strands. The concentrated plastic hinge method for cast-in-place reinforced concrete bridges could be used to bridges with precast segmental bridge columns.

scholarly journals Analytical Seismic Fragility Curves for Reinforced Concrete Wall pier using Shape Memory Alloys considering maximum drift

2019 ◽  
Vol 258 ◽  
pp. 04001 ◽  
Author(s):  
Nursafarina Ahmad ◽  
Azmi Ibrahim ◽  
Shahria Alam
Keyword(s):  
Reinforced Concrete ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Seismic Performance ◽  
Fragility Curves ◽  
Plastic Hinge ◽  
Bridge Pier ◽  
Seismic Fragility ◽  
Demand Model ◽  
Promising Alternative

Fragility curves express the seismic vulnerability of bridge piers for different damage states at various earthquake intensities. A fragility curve typically gives a physical understanding of repair costs and functionally levels of a bridge pier. Shape memory alloys (SMAs) provide a promising alternative material in reducing the failure probability of a bridge pier. This study develops a family of seismic fragility curves for reinforced concrete (RC) wall piers reinforced with three different types of SMA rebar in plastic hinge regions. An incremental dynamic analysis (IDA) using a total of 20 earthquake ground motions was performed on a SMA-RC wall pier to evaluate its seismic performance. The maximum drift recorded for each ground motion was taken as the seismic performance demand parameter of interest in this study. The probabilistic seismic demand model (PSDM) was used to generate fragility curves for each RC-SMA wall pier. The results show that the different mechanical properties and type of SMAs affect the performance of RC-SMA wall pier.

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