Effect of the arc-surfaced dampers on the collapse probability induced by pulse-like earthquakes

2021 ◽  
pp. 1-21
Author(s):  
Sara Balzadeh ◽  
Zakariya Waezi
Keyword(s):  
Collapse Probability

ASSESSING PAST CAVE COLLAPSE PROBABILITY USING GIS

2020 ◽  
Author(s):  
Ethan William Conley ◽  
◽  
Eric W. Peterson ◽  
John Kostelnick ◽  
Toby Dogwiler
Keyword(s):  
Collapse Probability

Response History Analysis for the Design of New Buildings in the NEHRP Provisions and ASCE/SEI 7 Standard: Part II - Structural Analysis Procedures and Acceptance Criteria

2017 ◽  
Vol 33 (2) ◽  
pp. 397-417 ◽  
Author(s):  
Curt B. Haselton ◽  
Andy Fry ◽  
Ronald O. Hamburger ◽  
Jack W. Baker ◽  
Reid B. Zimmerman ◽  
...  
Keyword(s):  
Design Guidelines ◽  
Philosophical Discussion ◽  
Acceptance Criteria ◽  
Statistical Framework ◽  
Collapse Probability ◽  
History Analysis ◽  
Response History Analysis ◽  
Local Acceptance ◽  
Global And Local ◽  
New Buildings

This paper represents the second part of a series of four publications on response history analysis for new buildings. It specifically focuses on modeling assumptions, consideration of important effects in the analysis, and interpretation of analysis results via global and local acceptance criteria. A statistical basis for development of both force- and deformation-controlled acceptance criteria consistent with the collapse probability goals of ASCE/SEI 7 is illustrated. More explicit sub-classifications of force- and deformation-controlled actions are proposed within the statistical framework. Additional philosophical discussion and simple probabilistic arguments are presented on the topic of consideration of unacceptable response, and guidance on addressing unacceptable response is given. Similarities and differences between the new requirements and those in other performance-based design guidelines are also enumerated.

Assessing the Collapse Probability of Base-Isolated Buildings considering Pounding to Moat Walls using the FEMA P695 Methodology

2015 ◽  
Vol 31 (4) ◽  
pp. 2069-2086 ◽  
Author(s):  
Armin Masroor ◽  
Gilberto Mosqueda
Keyword(s):  
Seismic Hazard ◽  
Ground Motions ◽  
Moment Frame ◽  
Isolation System ◽  
Braced Frame ◽  
Frame Model ◽  
Impact Forces ◽  
Collapse Probability ◽  
The Moment ◽  
The Impact

The collapse probability of two three story base-isolated buildings considering pounding to moat walls is examined using the methodology in FEMA P695. The superstructure models consist of a steel intermediate moment frame and a steel ordinary braced frame designed for the same seismic hazard. The behavior of these buildings under various ground motions is first examined, and it is found that the more rigid braced frame results in larger displacements demands on the isolation system, increasing the potential for impact. The collapse studies examine the effect of moat wall gap distance on the probability of collapse for these structures. These studies show that the flexibility and ductility of the moment frame model allow the superstructure to better absorb the impact forces. The braced frame superstructure tends to impact at lower shaking intensities and degrades in strength more rapidly due to the limited ductility that increases the risk of collapse.

Seismic Collapse Probability Considering Pounding and Financial Loss Estimation of Base-Isolated Reinforced Concrete Buildings

2018 ◽  
Vol 12 (03) ◽  
pp. 1850008 ◽  
Author(s):  
Satish Bhagat ◽  
Anil C. Wijeyewickrema
Keyword(s):  
Reinforced Concrete ◽  
Three Dimensional ◽  
Loss Estimation ◽  
Financial Loss ◽  
Reinforced Concrete Buildings ◽  
Nonstructural Components ◽  
Concrete Buildings ◽  
Collapse Probability ◽  
Seismic Collapse ◽  
Financial Losses

In this paper, the seismic collapse probability of base-isolated reinforced concrete buildings considering pounding with a moat wall and financial loss estimation is studied. For this purpose, three-dimensional finite element models of a code-compliant 10-story base-isolated shear wall-frame (BI-SWF) building and a 10-story base-isolated moment resisting frame (BI-MRF) building are used. Results indicate that the BI-MRF building has a greater probability of collapse compared to that of the BI-SWF building, the probability of collapse in 50 years for the BI-MRF building is 1.3 times greater than that of the BI-SWF building for both no pounding and pounding cases. The probability of collapse increases when pounding is considered, which results in a smaller value of the collapse margin ratio compared to no pounding case for both the buildings. The financial losses resulting from damage to the BI-MRF and BI-SWF buildings under design earthquake (DE) and risk-targeted maximum considered earthquake (MCER) levels are calculated for the no pounding case, since there was no pounding under DE-level and very few instances of pounding under MCER-level. Calculation of financial losses due to damage to structural and nonstructural components, service equipment and downtime shows that the BI-SWF building results in larger repair costs and downtime cost compared to the BI-MRF building.

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