[1]ZU Lin,HUANG Yong.Evaluation Method for Seismic Resilience of Maintenance Bridges[J].Journal of Seismological Research,2020,43(03):522-530.
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Evaluation Method for Seismic Resilience of Maintenance Bridges
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
43
Number of periods:
2020 03
Page number:
522-530
Column:
Public date:
2020-09-14
- Title:
- Evaluation Method for Seismic Resilience of Maintenance Bridges
- Keywords:
- bridge vulnerability; mid-span deflection; damage index; continuous beam bridge; incremental dynamic analysis
- CLC:
- U445; TU352
- DOI:
- -
- Abstract:
- This paper uses the mid-span deflection limit in the “Highway Bridge Technical Condition Assessment Standard(JTG / T H21-2011)” as the damage index to analyze the vulnerability of the main girder,and proposes an evaluation method for the seismic resilience of repaired bridges.Taking a five-span continuous girder bridge that has been repaired and strengthened as the main girder after years of operational damage,using finite element modeling and model modification methods,20 sets of seismic waves were selected using incremental dynamic analysis(IDA).Changes in the vulnerability of the bridge's main beam members before and after maintenance and reinforcement under earthquakes with different intensities; the relationship between the time-varying elastic modulus of the existing bridge and the mid-span deflection was explored using empirical statistical methods,and a functional loss based on mid-span deflection was proposed function; Combined with the case bridge specific repair and reinforcement construction method,a preliminary recovery function curve is proposed; on this basis,the seismic resilience index of the case bridge before and after repair reinforcement is calculated.The analysis results show that it is feasible to use the mid-span deflection as the damage index to evaluate the seismic resilience for the maintenance and strengthening of the bridge.From the vulnerability curve,it can be obtained that the maintenance and reinforcement is more obvious for the improvement of the seismic performance.Resilience decreases with the increase of the damage level,which is more obvious for minor damage and the difference in structural failure is small.
- References:
- -
- Similar References:
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Last Update:
2020-09-18