Probabilistic Damage Control Approach for Seismic Design of Bridges

Through a study funded by the California Department of Transportation (Caltrans), a probabilistic damage control approach (PDCA) and reliability analysis was used to develop performance based seismic design of bridge columns. The PDCA uses the extent of lateral displacement nonlinearity defined by “Damage Index” (DI) to measure the performance of bridge columns. The performance objective was defined based on predefined apparent damage states (DS) and the damage states were correlated to DIs based on a previous study. The correlation between DI and DS was determined from a statistical analysis (resistance model) of over 140 response data measured from testing of 22 bridge column models subjected to seismic loads. Extensive analytical modeling of seismic response of single column and multicolumn bents was conducted. A wide range of variables was included in the study to address the effect of aspect ratio, longitudinal steel ratio, site class, distance to active faults, earthquake return period, and number of columns per bent. Each column was analyzed under 25 near-field and far-field ground motions. A statistical analysis of the demand damage index (DIL) was performed to develop fragility curves (load model) and to determine the reliability index for each DS. The results of reliability analysis were analyzed and a direct PDCA was developed to calibrate design DI to obtain a desired reliability index against failure. The calculated reliability indices and fragility curves showed that the proposed method could be effectively used in seismic design of new bridges as well as seismic assessment of existing bridges. Included in the current project was an exploratory study to extend the PDCA to earthquake-damaged columns that have been repaired. Like conventional original (not repaired) columns, different damage states were defined for repaired columns associated with varying degree of damage

• Record URL:
  https://dot.ca.gov/-/media/dot-media/programs/research-innovation-system-information/documents/final-reports/ca14-2280-finalreport-a11y.pdf
• Record URL:
  https://merritt.cdlib.org/api/presign-file/ark%253A%252F13030%252Fm5c84d2x/2/producer%252F907085234.pdf
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/907085234
• Corporate Authors:

  University of Nevada, Reno

  Department of Civil and Environmental Engineering
  Reno, NV  United States  89557

  California Department of Transportation

  Division of Research and Innovation
  1227 O Street, MS-83
  Sacramento, CA  United States  94273-0001

  California Department of Transportation

  Division of Engineering Services
  1801 30th Street, West Building MS-9
  Sacramento, CA  United States  95807
• Authors:
  • Saini, Armarjeet
  • Saiidi, M Saiid
• Publication Date: 2014-6

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; References; Tables;
• Pagination: 216p

Subject/Index Terms

• TRT Terms: Bridge design; Columns; Earthquake resistant design; Mathematical models; Reliability
• Identifier Terms: Probabilistic Damage Control Approach (PDCA)
• Subject Areas: Data and Information Technology; Design; Highways; I24: Design of Bridges and Retaining Walls; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 01561712
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Report/Paper Numbers: CA14-2280, UNR/CA14-2280
• Contract Numbers: 65A0419
• Files: CALTRANS, TRIS, ATRI, STATEDOT
• Created Date: Apr 27 2015 9:55AM