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.

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

Fingerprint

seismic pounding
safety
ground motion
metropolitan area
analytical method
Random processes
hazard
Large scale systems
Earthquakes
Hazards
earthquake
methodology
Statistics
simulation
Computer simulation

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

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.
Tubaldi, E. ; Barbato, M. / Reliability-based assessment of seismic pounding risk between adjacent buildings. 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Corfu, Greece.16 p.
@conference{96b65deffa9e4ffc979c4f5c44af2781,
title = "Reliability-based assessment of seismic pounding risk between adjacent buildings",
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.",
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",
author = "E. Tubaldi and M. Barbato",
note = "cited By 1; 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2011 ; Conference date: 25-05-2011 Through 28-05-2011",
year = "2011",
language = "English",
url = "http://eccomas.cimne.com/cvdata/cntr1/spc14/dtos/img/mdia/COMPDYN-2011-Brochure.pdf",

}

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, 25/05/11 - 28/05/11, .

Reliability-based assessment of seismic pounding risk between adjacent buildings. / Tubaldi, E.; Barbato, M.

2011. 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Corfu, Greece.

Research output: Contribution to conferenceOther

TY - CONF

T1 - Reliability-based assessment of seismic pounding risk between adjacent buildings

AU - Tubaldi, E.

AU - Barbato, M.

N1 - cited By 1

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

KW - adjacent buildings

KW - analytical results

KW - analytical techniques

KW - building separation

KW - design codes

KW - earthquake ground motions

KW - first-passage

KW - horizontal displacements

KW - level of safeties

KW - limited space

KW - linear elastic behavior

KW - metropolitan area

KW - multi degree-of-freedom

KW - non-stationary random process

KW - performance-based earthquake engineering

KW - pounding

KW - reliability problems

KW - response process

KW - safety level

KW - seismic input

KW - seismic pounding

KW - separation distances

KW - spectral characteristics

KW - viscous dampers

KW - computational methods

KW - computer simulation

KW - earthquakes

KW - engineering geology

KW - random processes

KW - reliability

KW - retrofitting

KW - safety engineering

KW - structural dynamics

UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-80054829723&partnerID=40&md5=a72a91d5abd92c8202bc937143350333

M3 - Other

ER -

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