Summary of Task Order Projects :
Task Order 1 - Quantification of Building System Performance and Response
Parameters
The primary objective of this project is to beta test the methodology developed in the ATC-63 project that establishes a consistent and rational procedure for developing building system performance and response parameters (R, Cd, Ω0) for the linear design methods traditionally used in current building codes. Beta testing will be conducted on three structural systems: (a) special reinforced concrete shear walls; (b) special reinforced masonry shear walls; and (c) special steel concentrically braced frames. [more]
Task Order 2 - Development of Seismic Design Guidelines for Port and Harbor
Facilities
The primary objective of this project is to perform the first phase of work required to produce a seismic design guidelines document for critical port and harbor facilities, keying on containerized shipping activities. Both new construction and improved existing construction will be considered. The guidelines document will focus on improved earthquake survivability for containerized shipping functions, considering system-wide processes and functionality. [more]
Task Order 3 - Development of Technical Briefs on Structural Design Issues: Steel
and Reinforced Concrete Special Moment Frames
The primary objective of this project is to produce two new techbrief documents, one addressing the design, specification, and construction of Special Steel Moment Frames and one addressing the design, specification, and construction of Special Reinforced Concrete Moment Frames.
In each techbrief, model building code requirements and leading practitioner-recognized techniques will be synthesized to produce clear and concise design and construction guidance for use by structural designers. [more]
Task Order 4 - Quantification of Building System Performance and Response Parameters
A continuation of Task Order 1, the objective of this project is to conduct beta testing of the ATC-63 methodology on three additional structural systems: (a) ordinary reinforced masonry shear walls; (b) ordinary reinforced concrete moment frames; and (c) ordinary steel moment frames. [more]
Task Order 5 - Integration of Collapse Risk Mitigation Standards and Guidelines for Older Reinforced Concrete Buildings into National Standards: Phase I
Key work to be carried out under this task order includes: (1) formal communication with representatives from the NSF-funded Grand Challenge research project, Mitigation of Collapse Risks in Older Reinforced Concrete Buildings, (2) review of available sources in the literature regarding current research and practice related to older concrete buildings; (3) preparation of a technical report summarizing current standards of practice and available information; and (4) preparation of an updated Project Work Plan for completing the eventual guidance document. [more]
Task Order 6 - Improved Nonlinear Static Analysis of Multiple Degree-of-Freedom Systems
The primary objective of this project is to address the second of three unresolved issues from FEMA 440, which is related to improvement of simplified nonlinear modeling considering multiple-degree-of-freedom effects. Work will include an extensive literature search to identify the body of research on nonlinear static analysis and consideration of MDOF effects that has been generated since FEMA 440 was published. [more]
Task Order 7 - Development of Technical Brief on Structural Design Issues – Reinforced Concrete Diaphragm Systems
The primary objective of this task is to produce a new techbrief addressing the analysis and design of reinforced concrete diaphragms for buildings. This techbrief will be a synthesis of model building code requirements and leading practitioner-recognized techniques, resulting in clear and concise analysis, design, and construction guidance for use by structural engineers. [more]
Task Order 8 - Development of Technical Brief on Structural Design Issues – Guidelines for Performing Nonlinear Structural Analysis
The primary objective of this task is to produce a new techbrief addressing the application of current commercially available software and other analytical tools for conducting nonlinear structural analysis modeling for seismic design of buildings. This techbrief will be a synthesis of nonlinear structural modeling and analysis techniques that have been developed by researchers and leading practitioners, resulting in clear and concise analytical guidance for use by structural engineers. Both nonlinear static procedures (NSPs) and nonlinear dynamic procedures (NDPs) will be considered for inclusion in the techbrief, along with such issues as joint modeling techniques, damping, energy dissipation, strength and stiffness degradation, P-Delta effects, and techniques to enhance accuracy and mathematical stability. [more]
Task Order 9 - Improved Procedures for Selecting and Scaling Earthquake Ground Motions for Performing Time-History Analyses
The primary objective of this task is to develop guidance for selecting, generating, and scaling earthquake ground motions for effective use in performing response history analyses, such that ground motion uncertainties do not dominate the accuracies of these analyses. The project should also identify areas of research that are needed to further improve the guidance that is developed. [more]
Task Order 10 - Improved Procedures for Characterizing and Modeling Soil-Structure Interaction for Performance-Based Seismic Engineering
The primary objective of this task is to develop guidance for implementing soil-structure interaction in response history analyses, such that input ground motions accurately reflect both site geotechnical conditions and foundation impedance associated with the building under consideration. The project should also identify areas of research that are needed to further improve the guidance that is developed. [more]
Task Order 11 - Improved Structural Response Modification Factors for Seismic Design of New Buildings - Phase I
The primary objective of this task is to develop a framework for alternative formulations for response modification factors (R, Cd, Ω0) that consider the interdependency of period, ductility, overstrength, site classification, seismic design category, and/or occupancy category. Under this project, analytical studies will be carried out to define the seismic response modification factors in variable terms in order to facilitate uniform risk. Areas of research that are needed to further improve alternative response modification factors will also be identified. [more]
Task Order 12 – Assessment of ASCE 41 First Generation Performance-Based Seismic Design Methods for New Buildings in High Seismic Regions – Phases I-III
NIST has started work on a project to benchmark ASCE 41 first-generation performance-based seismic design procedures as applied to new building structures designed in accordance with ASCE/SEI 7-05, Minimum Design Loads for Buildings and Other Structures (ASCE 7). The primary objective of this task is to engage a Peer Review Panel (PRP) to provide technical support for the on-going NIST project by providing guidance and advice on technical detail and project scope, seismic hazard analysis, ground motion scaling for varying return periods, nonlinear dynamic analysis, structural behavior, design of building structures, and peer review services. [more]
Task Order 13 – Testing the Collapse Potential of Reinforced Concrete Structures
The primary objective of this task is to perform full-scale testing of two reinforced concrete specimens in support of internal NIST research on modeling of progressive collapse of concrete structures. NIST is obtaining experimental data on the collapse potential of reinforced concrete structures to verify and calibrate its modeling. The testing, conducted on two specimens, will simulate the loss of support of a middle column while end columns remain in place. Surrogate gravity loading and large displacements will be imposed on the beam and extensive data collection performed. [more]
