Postearthquake Strength Assessment of Steel Moment-Resisting Frame with Multiple Beam-Column Fractures Using Local Monitoring Data

AbstractQuantitative reports on postearthquake infrastructure condition are valuable to engineers, building owners, local government entities, and the public. Despite their utility, sensor-based protocols have not been widely embraced, primarily due to a lack of proper demonstrations. This paper int...

Full description

Saved in:
Bibliographic Details
Published in:Journal of structural engineering (New York, N.Y.) N.Y.), 2018-02, Vol.144 (2)
Main Authors: Matarazzo, Thomas J, Kurata, Masahiro, Nishino, Hiromichi, Suzuki, Akiko
Format: Article
Language:English
Subjects:
Beam-columns
Columns (structural)
Decoupling
Earthquake construction
Earthquake damage
Earthquakes
Emergency plans
Local government
Mathematical models
Methodology
Monitoring
Seismic design
Seismic engineering
Shake table tests
Steel frames
Steel structures
Stiffness
Strength
Structural engineering
Technical Papers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:AbstractQuantitative reports on postearthquake infrastructure condition are valuable to engineers, building owners, local government entities, and the public. Despite their utility, sensor-based protocols have not been widely embraced, primarily due to a lack of proper demonstrations. This paper introduces a methodology for determining the postearthquake strength of a steel moment-resisting frame with multiple beam-column fractures based on local monitoring data. The damage index (DI), an existing metric based on dynamic strain measurements, is applied to quantify damage-induced reductions in bending stiffness at each beam end in the frame with decoupling damage interaction effects. An analytical model with updated local stiffness information enables the estimation of the building’s reduced strength. The proposed methodology may be automated to provide crucial structural information that can optimize and supplement visual inspections immediately after an earthquake so that emergency plans may be initiated promptly. The methodology is first validated using experimental observations and sensor data collected during a substructure test. Then its application to strength reduction estimation of multistory, multibay frames is examined with shake table tests on a large-scale three-story steel frame. Fractures at beam-column connections are perfectly tracked in all damage stages using DI. Estimated reductions in base shear and stiffness are among the results produced, which permit explicit comparisons to performance design limits. Appropriate FEMA connection damage index values are included in the discussions.
ISSN:0733-9445
1943-541X
DOI:10.1061/(ASCE)ST.1943-541X.0001967