Repair Of Buildings Damaged By Earthquakes

Following the two damaging California earthquakes in1989 (Loma Prieta) and 1994 (Northridge), many concrete wall and masonry wall buildings were repaired using federal disaster assistance funding. The repairs were based on inconsistent criteria, giving rise to controversy regarding criteria for the repair of cracked concrete and masonry wall buildings. To help resolve this controversy, the Federal Emergency Management Agency (FEMA) initiated a project on evaluation and repair of earthquake-damaged concrete and masonry wall buildings in 1996. The ATC-43 project addresses the investigation and evaluation of earthquake damage and discusses policy issues related to the repair and upgrade of earthquake-damaged buildings. The project deals with buildings whose primary lateral-force-resisting systems consist of concrete or masonry bearing walls with flexible or rigid diaphragms, or whose vertical-load-bearing systems consist of concrete or steel frames with concrete or masonry infill panels. The intended audience is design engineers, building owners, building regulatory officials, and government agencies. The project results are reported in three documents. TheFEMA306report, Evaluation of Earthquake Damaged Concrete and Masonry Wall Buildings, Basic Procedures Manual, provides guidance on evaluating damage and analyzing future performance. Included in the document are component damage classification guides, and test and inspection guides. FEMA 307, Evaluation of Earthquake Damaged Concrete and Masonry Wall Buildings, Technical Resources, contains supplemental information including results from a theoretical analysis of the effects of prior damage on single-degree-of-freedom mathematical models, additional background information on the component guides, and an example of the application of the basic procedures. FEMA 308, The Repair of Earthquake Damaged Concrete and Masonry Wall Buildings ,discusses the policy issues pertaining to the repair of earthquake-damaged buildings and illustrates how the procedures developed for the project can be used to provide a technically sound basis for policy decisions. It also provides guidance for the repair of damaged components.

Following the two damaging California earthquakes in 1989 (Loma Prieta) and 1994 (Northridge), many concrete wall and masonry wall buildings were repaired using federal disaster assistance funding. The repairs were based on inconsistent criteria, giving rise to controversy regarding criteria for the repair of cracked concrete and masonry wall buildings. To help resolve this controversy, the Federal Emergency Management Agency (FEMA) initiated a project on evaluation and repair of earthquake damaged concrete and masonry wall buildings in 1996. The ATC-43 project addresses the investigation and evaluation of earthquake damage and discusses policy issues related to the repair and upgrade of earthquake damaged buildings. The project deals with buildings whose primary lateral-force-resisting systems consist of concrete or masonry bearing walls with flexible or rigid diaphragms, or whose vertical-load-bearing systems consist of concrete or steel frames with concrete or masonry infill panels. The intended audience is design engineers, building owners, building regulatory officials, and government agencies. The project results are reported in three documents. The FEMA 306 report, Evaluation of Earthquake Damaged Concrete and Masonry Wall Buildings, Basic Procedures Manual, provides guidance on evaluating damage and analyzing future performance. Included in the document are component damage classification guides, and test and inspection guides. FEMA 307, Evaluation of Earthquake Damaged Concrete and Masonry Wall Buildings, Technical Resources, contains supplemental information including results from a theoretical analysis of the effects of prior damage on single-degree-of-freedom mathematical models, additional background information on the component guides, and an example of the application of the basic procedures. FEMA 308, The Repair of Earthquake Damaged Concrete and Masonry Wall Buildings, discusses the policy issues pertaining to the repair of earthquake damaged buildings and illustrates how the procedures developed for the project can be used to provide a technically sound basis for policy decisions. It also provides guidance for the repair of damaged components.

This book introduces practising engineers and post-graduate students to modern approaches to seismic design, with a particular focus on reinforced concrete structures, earthquake resistant design of new buildings and assessment, repair and strengthening of existing buildings.

The Rapid Visual Screening (RVS) handbook can be used by trained personnel to identify, inventory, and screen buildings that are potentially seismically vulnerable. The RVS procedure compromises a method and several forms that help users to quickly identify, inventory, and score buildings according to the risk of collapse if hit by major earthquakes. This third edition includes extensive updates including: Update of the Basic Scores and Score Modifiers Update of the ground motion definitions Preparation of additional reference guides Inclusion of additional building types that are prevalent Inclusion of additional considerations, such as nonstructural hazards, existing retrofits, building additions, and adjacency Addition of an optional electronic scoring methodology and more. Related products: Natural & Environmental Disasters resources collection is available here: https://bookstore.gpo.gov/catalog/natural-environmental-disasters Other products produced by the U.S. Department of Homeland Security, Federal Emergency Management Administration (FEMA) are available here: https://bookstore.gpo.gov/agency/federal-emergency-management-agency-fema

Reinforced concrete (R/C) is one of the main building materials used worldwide, and an understanding of its structural performance under gravity and seismic loads, albeit complex, is crucial for the design of cost effective and safe buildings. Concrete Buildings in Seismic Regions comprehensively covers of all the analysis and design issues related to the design of reinforced concrete buildings under seismic action. It is suitable as a reference to the structural engineer dealing with specific problems during the design process and also for undergraduate and graduate structural, concrete and earthquake engineering courses. This revised edition provides new and significantly developed coverage of seismic isolation and passive devices, and coverage of recent code modifications as well as notes on future developments of standards. It retains an overview of structural dynamics, the analysis and design of new R/C buildings in seismic regions, post-earthquake damage evaluation, pre-earthquake assessment of buildings and retrofitting procedures, and several numerical examples. The book outlines appropriate structural systems for many types of buildings, explores recent developments, and covers the last two decades of analysis, design, and earthquake engineering. It specifically addresses seismic demand issues and the basic issues of structural dynamics, considers the "capacity" of structural systems to withstand seismic effects in terms of strength and deformation, and highlights the assessment of existing R/C buildings under seismic action. All of the material has been developed to fit a modern seismic code and offers in-depth knowledge of the background upon which the code rules are based. It complies with European Codes of Practice for R/C buildings in seismic regions, and includes references to current American Standards for seismic design.

Since the publication of the successful first edition of Earthquake Protection there have been 110 lethal earthquakes, killing 130 000 people; there have also been significant developments in the field of earthquake risk management, particularly in the modelling and analysis of risk for insurance and financial services. Furthermore, major earthquake disasters, such as the 1994 Northridge earthquake in California, the 1995 Kobe earthquake in Japan and the 1999 Kocaeli earthquake in Turkey have occurred. The experience and knowledge gained through these events have improved our understanding of how to manage, mitigate and work towards the prevention of similar catastrophes. The 1990s were in fact the costliest decade on record in terms of disaster management due to such seismic events, placing unprecedented pressure on the insurance industry in particular, and changing its view of earthquake protection. Significantly revised and updated, this second edition continues to provide a comprehensive overview of how to reduce the impact of earthquakes on people and property, and implement best practice in managing the consequences of such disasters. It also includes significant coverage of the techniques of modelling earthquake catastrophe. Each chapter deals with a separate aspect of protection, and covers a wide range of economic and social conditions, drawing on the authors' considerable personal experience and with reference to real life examples. Key features include: Recent event coverage Modern developments in the theory and practice of planning and engineering loss estimation techniques, along with new engineering techniques such as microzonation and hazard-mapping Historic buildings experience An entirely new chapter on 'Earthquakes and Finance' This valuable book provides essential reading for earthquake and structural engineers and geoscientists, as well as insurers and loss prevention specialists, risk managers and assessors involved in managing earthquake risk, urban and regional planners, and emergency management agencies.