SOLICITATION NOTICE
R -- DEVELOPMENT OF STRUCTURAL DATABASES AND BASELINE MODELS FOR THE WTC TOWERS
- Notice Date
- 1/15/2003
- Notice Type
- Solicitation Notice
- Contracting Office
- Department of Commerce, National Institute of Standards and Technology (NIST), Acquisition and Logistics Division, 100 Bureau Drive, Building 301, Room B129, Mail Stop 3571, Gaithersburg, MD, 20899-3571
- ZIP Code
- 20899-3571
- Solicitation Number
- Reference-Number-SB1341-03-W-0332
- Response Due
- 1/30/2003
- Archive Date
- 2/28/2004
- Point of Contact
- Elizabeth Simon, Contract Specialist, Phone 301-975-5106, Fax 301-975-8884, - Sandra Febach, Sup. Contracting Officer, Phone (301) 975-6326, Fax (301) 975-8884,
- E-Mail Address
-
elizabeth.simon@nist.gov, sandra.febach@nist.gov
- Description
- The National Institute of Standards and Technology (NIST) is conducting a national building and fire safety investigation of the World Trade Center (WTC) disaster. More information about NIST's investigation may be found at the NIST Web site http://wtc.nist.gov. NIST intends to enter into a sole source purchase order with Leslie E. Roberson Associates (LERA) to provide services under Project 2 (Baseline Structural Performance and Aircraft Impact Damage Analysis). Specific information for Project 2, may be found by following this link to the NIST Web site http://wtc.nist.gov/media/WTCplan_new.htm#proj2. The project team from LERA includes the engineer of record for the design of the WTC towers, the engineer of record for the repairs made after the 1993 bombing, the engineer(s) of record for modifications based on tenant alterations and ongoing technical work, and the engineer(s) of record for the structural integrity inspections of the towers. The LERA team has unique knowledge of the design construction, and intended behavior of the towers gained from having had the structural engineering responsibility from the inception of project planning through its life cycle to September 11, 2001; a span of about 38 years. No other individual or team possesses similar expertise or experience. The objectives of this requirement are to: (1) develop databases for the structural components of WTC 1 and 2, (2) use the databases to develop baseline structural models of each of the two towers, and (3) perform linear static, structural analyses to establish the baseline performance of each of the two towers under gravity and wind loads. The contractor shall provide the labor and materials necessary to perform the following three tasks: (1) Development of structural databases -- The contractor shall develop databases of all primary structural elements for all 110 stories and the 6 basement levels (within the footprint of the towers) of towers 1 and 2. The structural databases shall be developed in consultation with NIST and shall be delivered in the form of electronic spreadsheets. The databases will be used by NIST for the development of structural models for the various analytical phases of the investigation (including those that are part of this solicitation). The databases shall be developed on the basis of the structural drawings of the towers including modifications made after construction and as a result of the 1993 bombing. The databases shall include all structural elements needed for development of the baseline structural models in Task 2. (2) Development of structural models -- The contractor shall use the structural databases developed in Task 1 to develop linear, finite element structural models of WTC 1 and 2. The models shall be developed using SAP2000 software, and shall include: i) Models A: Detailed linear elastic, three-dimensional models of 1/4 floor system of (1) a typical truss floor system between the 80th and 100th floor, and (2) a mechanical floor (girder system). The models will include all structural members of the floor system such as primary trusses and girders, secondary trusses and beams, composite concrete slabs, spandrel beams, and diagonal brace members (straps) as well as structural dampers. The contractor shall use these models to establish the baseline performance of the floor systems under gravity loads; estimate the in-plane stiffness of the floor diaphragms and to develop simplified models for the floor system that accurately capture the behavior of the floor diaphragms; and to develop similar models for floors 89 to 103 of WTC 1 and floors 74 to 88 of WTC2 that will be used by NIST for other analytical phases of the investigation. ii) Models B: Linear elastic, three-dimensional models of the 110-story structure and basement floors of each of the two towers. The models will include all primary structural elements including (but not limited to) exterior columns, interior columns, columns and bracings in basement floors, spandrel beams, hat trusses, simplified models for floor systems as developed from models A, and connections critical to the behavior of the structures. The models will be used to establish the baseline performance of each of the two towers under gravity and wind loads. The contractor shall conduct preliminary, "small-scale" analyses to verify the validity of the various element types used in the development of models for components and connections (e.g. sub-assemblies of pre-fabricated exterior column elements with connections between columns and between spandrel beams). The contractor shall conduct an eigenvalue analysis to compare the calculated natural frequencies against frequencies measured in the original structures. 3) Baseline performance analysis -- The contractor shall use the structural models developed in Task 2 to conduct linear static, structural analyses of each of the two towers to establish their baseline performance. The towers shall be analyzed under the following loads: i) Gravity loads: The contractor shall analyze models A and B under gravity loads and consider the following cases: (1) dead loads, (2) live loads used in the original design of the towers, and (3) live loads according to either current New York City building code or current ASCE 7 standard (to be selected). ii) Lateral wind loads: The contractor shall analyze models B under wind loads and consider the following cases: (1) wind loads used for the original design of the towers, and (2) wind loads based on currently available aerodynamic information (from three sets of wind tunnel tests, including the tests conducted during the design stage and two sets of tests conducted recently by private sector consultants) and on extreme climatological information from available data and applicable standards. The information from wind loads for case (2) will be supplied by NIST. The Government anticipates the award of a commercial firm-fixed price purchase order on or about February 3, 2003. The proposed requirement is for services for which the Government intends to solicit and negotiate with only one source under the authority of FAR 13.106-1(b). Interested persons may identify their interest and capability to respond to the requirement. This notice of intent is not a request for competitive quotations. A determination by the Government not to compete this proposed requirement based upon responses to this notice is solely within the discretion of the Government. Information received will be considered solely for the purpose of determining whether to conduct a competitive procurement. A Request for Quotation (RFQ) package is not available.
- Web Link
-
Link to FedBizOpps document.
(http://www.eps.gov/spg/DOC/NIST/AcAsD/Reference-Number-SB1341-03-W-0332/listing.html)
- Place of Performance
- Address: 100 Bureau Drive, Gaithersburg, MD
- Zip Code: 20871
- Country: USA
- Zip Code: 20871
- Record
- SN00239837-F 20030117/030115215555 (fbodaily.com)
- Source
-
FedBizOpps.gov Link to This Notice
(may not be valid after Archive Date)
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