SMART Shear Keys for Tsunami/Storm Surge-Hazards Mitigation of Concrete Girder Bridges

Zhang, Haibin; Tie, Riti; Chen, Genda; Yuan, Xinzhe; Hainan University; Missouri University of Science and Technology. Center for Intelligent Infrastructure

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SMART Shear Keys for Tsunami/Storm Surge-Hazards Mitigation of Concrete Girder Bridges

2024-09-01
By Zhang, Haibin ; Tie, Riti ; Chen, Genda ; ...

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Creators:

Zhang, Haibin ; Tie, Riti ; Chen, Genda ; Yuan, Xinzhe

Zhang, Haibin ; Tie, Riti ; Chen, Genda ; Yuan, Xinzhe Less -
Corporate Creators:

Hainan University ; Missouri University of Science and Technology. Center for Intelligent Infrastructure

Hainan University ; Missouri University of Science and Technology. Center for Intelligent Infrastructure Less -
Corporate Contributors:

University of Nebraska. Mid-America Transportation Center ; United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology

University of Nebraska. Mid-America Transportation Center ; United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology Less -
Subject/TRT Terms:

[+]

Algorithms Bridge Construction Diaphragms (Engineering) Earthquake Resistant Design Girder Bridges Hurricanes Optimization Superstructures Tsunamis
Publication/ Report Number:

25-1121-0005-132-4
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report January 1, 2012, - June 30, 2024
Corporate Publisher:

University of Nebraska. Mid-America Transportation Center
Abstract:

Bridges have recently been exposed to an increasing number of natural hazards such as earthquakes and tsunamis. These extreme events have resulted in transverse offsets, overturning moments, and even dropping-off of superstructures due to their weak connection to substructures. These outcomes are potentially prevented or mitigated by developing and deploying sliding, modular, adaptive, replaceable, and two-dimensional (SMART) shear keys as fuse elements between superstructures and substructures. The novelty of SMART shear keys is to enable an adaptive control of both the force and displacement of bridges under different types of loads. In this study, the performance of SMART shear keys under tsunami loading was investigated through a 1/5-scale six-girder concrete bridge model. Four levels of tsunami-like solitary waves 0.27~ 0.72 m in height were generated in the large wave flume and applied on the reinforced concrete bridge. To evaluate the performance of the shear keys, the dynamic responses of the bridge model were measured from accelerometers, load cells, and displacement sensors. The shear keys were prestressed to 0~200 MPa to represent flexible, medium, and fixed superstructure-substructure connections, respectively. The test results indicated that the residual displacements of the SMART shear keys were less than 1 mm in the vertical direction and zero in the horizontal direction. The energy dissipated by the SMART shear keys was up to 32.5% of the input energy that the bridge received from the tsunami loading. The natural frequency and energy dissipation of the bridge were respectively modified up to 18% and 14.2% by changing the prestress level of the SMART shear keys from 0 to 200 MPa.
Format:

PDF
Funding:

69A3551747107
Collection(s):

University Transportation Centers
Main Document Checksum:

[+]

urn:sha-512:b7ebec773a690cbc7b1df527400a81dd33835fffbbe2748b895ddfd2c08e0ec078706d7a118c798db42b9d399413c2bcf389acd2f6e4ef1a10394a834f808788
Download URL:

https://rosap.ntl.bts.gov/view/dot/77894/dot_77894_DS1.pdf
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SMART Shear Keys for Tsunami/Storm Surge-Hazards Mitigation of Concrete Girder Bridges

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