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FEMA P 2139 1 2020

FEMA P 2139 1 2020

$21.45

FEMA P-2139-1: Short-Period Building Collapse Performance and Recommendations for Improving Seismic Design Volume 1 – Overarching Findings, Conclusions, and Recommendations

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FEMA 2020
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PDF Catalog

PDF Pages PDF Title
1 FEMA P-2139-1
3 Short-Period Building Collapse Performance and Recommendations for Improving Seismic Design
Volume 1 – Overarching Findings, Conclusions, and Recommendations
5 Foreword
7 Preface
9 Table of Contents
11 List of Figures
15 List of Tables
17 Chapter 1: Introduction
18 1.1 Background and Purpose
21 1.2 Approach and Scope
23 1.3 Organization and Content
25 Chapter 2: Short-Period Building Background
2.1 Selection of Short-Period Building Systems for Detailed Studies
31 2.2 Short-Period Building Seismic Performance Paradox
32 2.3 Prior Analytical Studies of Bilinear SDOF Models
39 Chapter 3: Observed Collapse Performance and Benchmarks
3.1 Overview
40 3.2 U.S. Earthquakes (1964–2014) and Building-Related Fatalities and Economic Losses
42 3.3 Collapse Performance of Short-Period Buildings in Past Earthquakes
44 3.3.1 Wood Light-Frame Buildings
47 3.3.2 Reinforced Masonry Buildings
49 3.3.3 Steel SCBF Buildings
53 3.4 Benchmark Collapse Metrics of Short-Period Buildings Based on Wood Light-Frame Building Performance
58 3.5 Summary of Key Observations of Short-Period Building Performance
59 Chapter 4: Archetypes, Parametric Studies, and Findings
4.1 Overview of Parametric Studies of Short-Period Buildings
63 4.2 Summary of Archetype Designs and Configurations
4.2.1 Design of Wood Light-Frame Archetypes
65 4.2.2 Design of Reinforced Masonry Archetypes
66 4.2.3 Design of Steel SCBF Archetypes
67 4.3 Summary of Numerical Modeling
4.3.1 Numerical Modeling of Wood Light-Frame Archetypes
69 4.3.2 Numerical Modeling of Reinforced Masonry Archetypes
72 4.3.3 Numerical Modeling of Steel SCBF Archetypes
74 4.4 Summary of Numerical Results: High-Seismic Baseline Archetypes
80 4.5 Key Findings Applicable to All Three Short-Period Systems
4.5.1 Key Findings of Baseline High-Seismic Studies
81 4.5.2 Key Findings of Collapse Displacement Capacity Studies
82 4.5.3 Key Findings of Baseline Very High-Seismic Studies
83 4.5.4 Relationship between Strength and Collapse Displacement Capacity
4.5.5 Key Findings of SSI and Foundation Flexibility Studies
85 Chapter 5: Generic Collapse Performance
5.1 SDOF Study Purpose and Methods
5.1.1 Introduction
86 5.1.2 SDOF Models
88 5.1.3 Incremental Dynamic Analysis
89 5.1.4 Collapse Evaluation Criteria
92 5.2 SDOF Study Results
5.2.1 Peak Inelastic Displacement
93 5.2.2 Collapse Fragility Curves
97 5.2.3 Median Collapse Trends
99 5.2.4 ACMR and ACMR/ACMR10%
101 5.3 Comparison of ACMR Results with those of Prior SDOF Studies
102 5.4 Notional Collapse Surfaces
103 5.4.1 Approach
5.4.2 Collapse Surface Metrics
106 5.4.3 SDOF Model Analysis and Collapse Results
110 5.4.4 Development of Notional Collapse Surfaces
119 Chapter 6: Paradox Solved
6.1 Resolution of the Short-Period Building Seismic Performance Paradox
6.1.1 Collapse Trends with Period Reversed
121 6.1.2 MCER Collapse Performance
123 6.2 Applicability to Other SFRSs of Short-Period Buildings
6.2.1 Conceptual Relationship
125 6.2.2 SFRSs of ASCE/SEI 7-16
127 6.3 Extrapolation to Other SFRSs of Short-Period Buildings
131 Chapter 7: Recommendations
7.1 Introduction
7.2 Recommendations for Improved Seismic Design Codes and Standards
137 7.3 Recommendations for Advanced Seismic Design and Analysis
138 7.4 Recommendations for Enhanced Modeling, Testing, and Data Collection
141 References
149 Project Participants
Charles A. Kircher (Project Technical Director)
154 Back Cover

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FEMA P 2139 1 2020
$21.45