Reliability-based assessment of seismic pounding risk between adjacent buildings

E. Tubaldi, M. Barbato

Research output: Contribution to conferenceOther

2 Citations (Scopus)

Abstract

Earthquake ground motion excitation can induce pounding in adjacent buildings with inadequate separation distance. This hazard is particularly relevant in densely inhabited metropolitan areas, due to the very limited space among buildings. Existing procedures for minimum separation distance are based on approximations of the peak relative horizontal displacement between adjacent buildings, and are characterized by unknown safety levels. The present study proposes a reliability-based procedure for assessing the level of safety corresponding to a given value of the separation distance between adjacent buildings exhibiting linear elastic behavior. The seismic input is modeled as a nonstationary random process, and the first-passage reliability problem corresponding to the pounding event is solved employing analytical techniques involving the determination of some specific statistics of the response processes. Comparison of computed analytical results with numerical simulation results are also shown, in order to validate the proposed methodology. The proposed procedure is employed for evaluating the reliability of simplified design code formulae used to determine building separation distances. Furthermore, the capability of the proposed method to deal with complex systems is demonstrated by assessing the effectiveness of the use of viscous dampers, according to different retrofit schemes, in reducing the pounding probability of adjacent buildings modeled as multi-degree-of-freedom systems.
Original languageEnglish
Number of pages16
Publication statusPublished - 2011
Event3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering - Corfu, Greece
Duration: 25 May 201128 May 2011
Conference number: 3
http://eccomas.cimne.com/cvdata/cntr1/spc14/dtos/img/mdia/COMPDYN-2011-Brochure.pdf

Conference

Conference3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
Abbreviated titleCOMPDYN 2011
CountryGreece
CityCorfu
Period25/05/1128/05/11
Internet address

Keywords

  • adjacent buildings
  • analytical results
  • analytical techniques
  • building separation
  • design codes
  • earthquake ground motions
  • first-passage
  • horizontal displacements
  • level of safeties
  • limited space
  • linear elastic behavior
  • metropolitan area
  • multi degree-of-freedom
  • non-stationary random process
  • performance-based earthquake engineering
  • pounding
  • reliability problems
  • response process
  • safety level
  • seismic input
  • seismic pounding
  • separation distances
  • spectral characteristics
  • viscous dampers
  • computational methods
  • computer simulation
  • earthquakes
  • engineering geology
  • random processes
  • reliability
  • retrofitting
  • safety engineering
  • structural dynamics

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  • Cite this

    Tubaldi, E., & Barbato, M. (2011). Reliability-based assessment of seismic pounding risk between adjacent buildings. 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Corfu, Greece.