Andrew Whittaker | |
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Born | Andrew Stuart Whittaker February 14, 1956 |
Alma mater | University of Melbourne, University of California, Berkeley |
Occupation(s) | Professor, engineer, University at Buffalo |
Known for | Contributions to the development of performance-based earthquake engineering, blast and impact engineering, and to seismic isolation and damping systems for buildings, bridges and nuclear power plants. |
Andrew Stuart Whittaker (born February 14, 1956) is an American structural engineer who is currently a SUNY Distinguished Professor in the Department of Civil, Structural and Environmental Engineering at the University at Buffalo, State University of New York.
Whittaker earned a bachelor's of science in civil engineering from the University of Melbourne, Australia in 1977. He received an M.S. in civil engineering in 1985, and his Ph.D in civil engineering in 1988, both from the University of California, Berkeley. [1]
Whittaker is a licensed civil (C45013) [2] and structural (S3618) [3] engineer in California. He worked for the international consultancy Aurecon (formerly John Connell and Associates) from 1978 to 1984 in Australia and Singapore, and for Forell/Elsesser Engineers in San Francisco, California from 1989 to 1992. He has consulted in the fields of earthquake and blast engineering since 1992. [4]
Whittaker has been engaged in the development of codes, standards and guidelines in the United States since the late 1980s, including the National Earthquake Hazards Reduction Program Recommended Provisions, [5] [6] [7] the American Society of Civil Engineers/Structural Engineering Institute (ASCE/SEI) Standards 4, [8] 7, [9] [10] 41, [11] 43 [12] and 59, [13] and American Concrete Institute (ACI) Code 349. He is a member of the ASCE Blue Ribbon Panel for the update of the ASCE Manual of Practice for Structural Design for Physical Security. He chairs the ASCE Nuclear Standards Committee, [14] which oversees the development of ASCE/SEI Standards 1, 4 and 43.
Whittaker has served on the Board of Directors for the Structural Engineers Association of Northern California (SEAONC) from 1996 to 1998, for the Earthquake Engineering Research Institute (EERI) from 2008 to 2010, and for the Word Seismic Safety Initiative (WSSI) from 2008 to 2010. [15] He served on the External Advisory Board for the Southern California Earthquake Center from 2010 to 2017. [16] Whittaker was Vice President (2003 to 2004) and President (2005 to 2011) of the Consortium of Universities for Research in Earthquake Engineering (CUREE) [17]
Whittaker has developed applied research products for use in the seismic and blast/impact analysis and design of buildings, bridges, and infrastructure, including nuclear power plants. His research products are referenced in ASCE/SEI Standards 4, 7, 41, and 43, the 2010 AASHTO Guide Specification for Seismic Isolation Design, [18] and FEMA 273, [19] 27, [20] and P-58. [21] Whittaker was a contributor to the development of the first generation of tools for performance-based earthquake engineering, first published as FEMA 273 and FEMA 274, and later as ASCE 41, and led the Structural Performance Products team that developed the second generation of tools for performance-based earthquake engineering, published as FEMA-P-58 Volumes 1, 2 and 3. He directed ATC project 34 [22] that studied seismic response modification factors and other critical code issues (1993 to 2002) and ATC Project 82 [23] that developed guidance on the selection and scaling of earthquake ground motions for response-history analysis (2010 to 2012). Whittaker developed the technical basis for maximum-direction ground motions for ASCE/SEI 7-10, and for the implementation of seismic isolation in safety-related nuclear structures that is codified in Chapter 12 of ASCE/SEI 4-16, will be codified in Chapter 9 of ASCE/SEI 43-19, and is documented in three NUREG/CRs published by the US Nuclear Regulatory Commission.
Whittaker has held the rank of State University of New York (SUNY) Distinguished Professor, the highest academic rank in the SUNY system, since 2018. [24] He received the American Society of Civil Engineers (ASCE) Walter P. Moore Award in 2017, [25] the ASCE Stephen D. Bechtel Energy Award in 2017, [26] and was elected to Fellow of the American Concrete Institute in 2012, [27] Fellow of the American Society of Civil Engineers in 2016, and Fellow of the Structural Engineering Institute of ASCE in 2016. [28] Whittaker was named as a Professor of Earthquake Engineering at the International Joint Laboratory for Earthquake Engineering Research at Tongji University in China in 2018, [29] and the United Kingdom’s Institution of Civil Engineers Mallet-Milne lecturer in 2019. [30] In 2002, Whittaker, together with his SUNY colleague Michael Constantinou and Thornton-Tomasetti, received the American Council of Engineering Companies and the New York Association of Consulting Engineering Companies Diamond Award.
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. With better understanding of seismic demand on structures and with our recent experiences with large earthquakes near urban centers, the need of seismic retrofitting is well acknowledged. Prior to the introduction of modern seismic codes in the late 1960s for developed countries and late 1970s for many other parts of the world, many structures were designed without adequate detailing and reinforcement for seismic protection. In view of the imminent problem, various research work has been carried out. State-of-the-art technical guidelines for seismic assessment, retrofit and rehabilitation have been published around the world – such as the ASCE-SEI 41 and the New Zealand Society for Earthquake Engineering (NZSEE)'s guidelines. These codes must be regularly updated; the 1994 Northridge earthquake brought to light the brittleness of welded steel frames, for example.
Seismic analysis is a subset of structural analysis and is the calculation of the response of a building structure to earthquakes. It is part of the process of structural design, earthquake engineering or structural assessment and retrofit in regions where earthquakes are prevalent.
Earthquake engineering is an interdisciplinary branch of engineering that designs and analyzes structures, such as buildings and bridges, with earthquakes in mind. Its overall goal is to make such structures more resistant to earthquakes. An earthquake engineer aims to construct structures that will not be damaged in minor shaking and will avoid serious damage or collapse in a major earthquake. A properly engineered structure does not necessarily have to be extremely strong or expensive. It has to be properly designed to withstand the seismic effects while sustaining an acceptable level of damage.
The George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) was created by the National Science Foundation (NSF) to improve infrastructure design and construction practices to prevent or minimize damage during an earthquake or tsunami. Its headquarters were at Purdue University in West Lafayette, Indiana as part of cooperative agreement #CMMI-0927178, and it ran from 2009 till 2014. The mission of NEES is to accelerate improvements in seismic design and performance by serving as a collaboratory for discovery and innovation.
Dr. W. Gene Corley, P.E. was an American structural engineer and "preeminent expert on building collapse investigations and building codes." Corley was the Senior Vice President of CTLGroup from 1987 to 2013, where he led structural engineering projects, including numerous evaluations of buildings and structures damaged by earthquake, explosions, and from terrorist attacks. He led the investigation of structural performance of the Murrah Building following the Oklahoma City bombing in 1995, and the World Trade Center Building Performance Study in 2001–2002 following the September 11, 2001 attacks. He died on March 1, 2013. He was 77.
Seismic base isolation, also known as base isolation, or base isolation system, is one of the most popular means of protecting a structure against earthquake forces. It is a collection of structural elements which should substantially decouple a superstructure from its substructure that is in turn resting on the shaking ground, thus protecting a building or non-building structure's integrity.
Ground–structure interaction (SSI) consists of the interaction between soil (ground) and a structure built upon it. It is primarily an exchange of mutual stress, whereby the movement of the ground-structure system is influenced by both the type of ground and the type of structure. This is especially applicable to areas of seismic activity. Various combinations of soil and structure can either amplify or diminish movement and subsequent damage. A building on stiff ground rather than deformable ground will tend to suffer greater damage. A second interaction effect, tied to mechanical properties of soil, is the sinking of foundations, worsened by a seismic event. This phenomenon is called soil liquefaction.
Earthquake-resistant or aseismic structures are designed to protect buildings to some or greater extent from earthquakes. While no structure can be entirely impervious to earthquake damage, the goal of earthquake engineering is to erect structures that fare better during seismic activity than their conventional counterparts. According to building codes, earthquake-resistant structures are intended to withstand the largest earthquake of a certain probability that is likely to occur at their location. This means the loss of life should be minimized by preventing collapse of the buildings for rare earthquakes while the loss of the functionality should be limited for more frequent ones.
Incremental dynamic analysis (IDA) is a computational analysis method of earthquake engineering for performing a comprehensive assessment of the behavior of structures under seismic loads. It has been developed to build upon the results of probabilistic seismic hazard analysis in order to estimate the seismic risk faced by a given structure. It can be considered to be the dynamic equivalent of the static pushover analysis.
Ashraf Habibullah is a Pakistani-American structural engineer and software developer best known as the founder, President, and CEO of Computers and Structures, Inc., a structural and earthquake engineering software company based in Berkeley, California. Upon founding the privately held company in 1975, Ashraf co-created the first structural-engineering software available to the personal computer, and has since created a suite of products, and developed their capabilities. Notably, ETABS, a multi-story building analysis and design software, received recognition as one of the Applied Technology Council and Engineering News-Record Top Seismic Products of the 20th Century. Today, CSI is recognized globally as the pioneer in the development of software for structural and earthquake engineering. CSI's software is used by thousands of engineering firms and is the choice of sophisticated design professionals in over 160 countries. Ashraf has a deep personal interest in the study of human psychology and human behavior and how they can be leveraged to help people from all walks of life reach their maximum potential.
Seismic codes or earthquake codes are building codes designed to protect property and life in buildings in case of earthquakes. The need for such codes is reflected in the saying, "Earthquakes don't kill people—buildings do." Or in expanded version, “Earthquakes do not injure or kill people. Poorly built manmade structures injure and kill people.”
Michael John Nigel Priestley was a New Zealand earthquake engineer. He made significant contributions to the design and retrofit of concrete structures, and developed the first displacement-based method of seismic design.
Earthquake rotational loading indicates the excitation of structures due to the torsional and rocking components of seismic actions. Nathan M. Newmark was the first researcher who showed that this type of loading may result in unexpected failure of structures, and its influence should be considered in design codes. There are various phenomena that may lead to the earthquake rotational loading of structures, such as propagation of body wave, surface wave, special rotational wave, block rotation, topographic effect, and soil structure interaction.
Medhat Haroun was an Egyptian-American expert on earthquake engineering. He wrote more than 300 technical papers and received the Charles Martin Duke Lifeline Earthquake Engineering Award (2006) and the Walter Huber Civil Engineering Research Prize (1992) from the American Society of Civil Engineers.
Michael C. Constantinou is an American structural engineer who is a Samuel P. Capen Professor and State University of New York Distinguished Professor in the Department of Civil, Structural and Environmental Engineering at the University at Buffalo. He also serves an editor of the Journal of Earthquake Engineering and Structural Dynamics
Textile-reinforced mortars (TRM) (also known as fabric-reinforced cementitious mortars are composite materials used in structural strengthening of existing buildings, most notably in seismic retrofitting. The material consists of bidirectional orthogonal textiles made from knitted, woven or simply stitched rovings of high-strength fibres, embedded in a inorganic matrices. The textiles can also be made from natural fibres, e.g. hemp or flax.
Dr. Hideki "Kit" Miyamoto is a Japanese American structural engineer known for being the founder-CEO of Miyamoto International, a global structural engineering and disaster risk reduction organization. He is also the chairman of California's Alfred E. Alquist Seismic Safety Commission, which investigates earthquakes and recommends policies for risk reduction.
Jack Moehle is the Ed and Diane Wilson Presidential Professor of Structural Engineering at the University of California, Berkeley.
Satish Nagarajaiah is an Indian-American academic professor, who teaches and conducts research in the departments of civil engineering and of mechanical engineering at Rice University. He was elected in 2019 to the United States National Academy of Inventors. He got elected in 2021 as Distinguished Member of American Society of Civil Engineers for achieving eminence in structural engineering, in 2017 as fellow of the American Society of Civil Engineers, and in 2012 as fellow of ASCE's Structural Engineering Institute. He has been honored with the 2020 Nathan N. Newmark Medal, 2017 Reese Research Prize, 2015 Leon S. Moisseiff Award from the ASCE. He is considered an authority in seismic isolation and adaptive stiffness structural systems and is known for his contributions to structural engineering.
The National Earthquake Hazards Reduction Program (NEHRP) was established in 1977 by the United States Congress as part of the Earthquake Hazards Reduction Act of 1977. The original stated purpose for NEHRP was "to reduce the risks of life and property from future Earthquakes in the United States through the establishment and maintenance of an effective earthquake hazards reduction program." Congress periodically reviews and reauthorizes NEHRP, with the most recent review happening in 2018.