.png){kind=icon}
.png){kind=icon}
Return
Seismic behavior of RC skewed bridges equipped with BRB elements under rotational ground motions
.png){kind=icon}
PRE
AI
H
G
DOI：10.1007/s11803-026-2404-2.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
This study investigates the seismic performance of skewed highway bridges retrofitted with buckling-restrained braces (BRBs) under the combined effects of translational and rotational ground motion components. Skewed bridges, with their asymmetrical geometry and irregular distribution of seismic forces, are highly susceptible to seismic excitations, particularly under complex loading scenarios involving rotational motions. While retrofitting strategies like BRBs have shown promise in enhancing seismic performance, the influence of rotational components remains insufficiently studied due to challenges in recording these motions and their limited integration into seismic design codes. To tackle these challenges, rotational ground motions were estimated using the geodetic method with data from the Chiba dense array. A nonlinear finite element model of a prestressed reinforced concrete box girder bridge was developed in OpenSees, and time-history analyses were conducted to evaluate seismic demands across varying skew angles. Key response parameters, including transverse drift, column shear force, deck rotation, and shear key deformation, were assessed. The results demonstrated that rotational components could significantly amplify deformation demands, with in-plane deck rotation and shear key deformation increasing by approximately 150% and 68%, respectively. Moreover, BRBs effectively enhanced the seismic performance of skewed bridges by reducing critical demands and improving the system’s resilience under complex loading conditions. These findings highlight the necessity of integrating rotational components into seismic design criteria and reveal the potential of BRBs as a retrofitting solution to mitigate seismic vulnerabilities in skewed bridges, ensuring their safety and functionality during seismic events.
Keywords:
skewed bridge
seismic rehabilitation
nonlinear time history analysis
buckling restrained brace
rotational components
Journal
IF:
3.3
Papers:
115
Citations:
3.0K
Organization
Cited Papers