Summary of Task Order Projects : 11 - 15
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]
Task Order 14 – Development of Technical Brief on Structural Design Issues – Steel Deck Diaphragm Systems
The primary objective of this task is to produce a new Seismic Design Technical Brief addressing the analysis, design, and detailing of steel deck diaphragms for steel buildings that must resist lateral forces from inertial effects in earthquakes. This Seismic Design Technical Brief 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 practicing structural engineers. Its scope largely excludes metal-deck-only diaphragms, a topic planned for a future Technical Brief. [more]
Task Order 15 – Development of Technical Brief on Structural Design Issues – Special Reinforced Concrete Shear Walls
The primary objective of this task is to produce a new Seismic Design Technical Brief addressing the analysis, design, and detailing of special reinforced concrete shear walls that must resist lateral forces from inertial effects in earthquakes. This Seismic Design Technical Brief 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 practicing structural engineers. [more]
