precast concrete diaphragm design new provisions

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Precast Concrete Diaphragm Design – New Provisions

Precast Concrete Diaphragm Design – New Provisions October 8, 2019. ASCE 7-16 Seismic Design Methodology • A new alternative design method is included in ASCE 7-16 ... Design of Precast Concrete Diaphragms for Earthquake Motions –ACI 550.4-18: Qualification of Precast

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New Seismic Design Provisions for Diaphragms in Precast ...

Diaphragm damage was observed in several precast concrete parking structures following the 1994 Northridge earthquake. In order to reduce the likelihood of damage in future earthquakes, the design provisions for chord reinforcement in diaphragms were modified in the 1997 Uniform Building Code, and new provisions for selecting

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New Seismic Design Provisions for Diaphragms in Precast ...

Diaphragm damage was observed in several precast concrete parking structures following the 1994 Northridge earthquake. In order to reduce the likelihood of damage in future earthquakes, the design provisions for chord reinforcement in diaphragms were modified in the 1997 Uniform Building Code, and new provisions for selecting web reinforcement ...

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New Seismic Design Provisions for Diaphragms in Precast ...

Request PDF New Seismic Design Provisions for Diaphragms in Precast Concrete Parking Structures Diaphragm damage was observed in several precast concrete

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New 2020 NEHRP Provisions for Seismic Design of Diaphragms

methodology for precast concrete diaphragms, cast-in-place concrete diaphragms, and wood diaphragms. New in the 2020 NEHRP update is the extension of this methodology to bare steel deck diaphragms. New Rs values are proposed for Table 12.10-1, addressing bare (untopped) steel deck diaphragms designed in accordance with new provisions in AISI S400

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New Seismic Design Provisions for Diaphragms in Precast ...

Request PDF On Jan 1, 2000, John F. Stanton published New Seismic Design Provisions for Diaphragms in Precast Concrete Parking Structures Find, read and

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NEW SEISMIC DESIGN PROVISIONS FOR DIAPHRAGMS IN PRECAST

Diaphragm damage was observed in several precast concrete parking structures following the 1994 Northridge earthquake. In order to reduce the likelihood of damage in future earthquakes, the design provisions for chord reinforcement in diaphragms were modified in the 1997 Uniform Building Code, and new provisions for selecting web reinforcement ...

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New Seismic Design Provisions for Diaphragms in Precast ...

Request PDF New Seismic Design Provisions for Diaphragms in Precast Concrete Parking Structures Diaphragm damage was observed in several precast concrete

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Seismic Design of Precast Concrete Diaphragms

of these. Concrete diaphragms can be conventionally reinforced or prestressed, and can be cast-in-place concrete slabs (often post-tensioned), topping slabs on metal deck or precast concrete, or interconnected precast concrete slabs without topping, though the last system has not been used much in structures assigned to SDC D, E, or F.

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Seismic Design Methodology for Precast Concrete

Precast concrete diaphragm design based on performance requirements and capacity design concepts. (a) (b) (c) November-December 2005 17 3. Detail level a. A classification system for diaphragm reinforcement ... of new details. It is noted that in creating these design deliverables, the

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Seismic Design Recommendations for Precast Concrete ...

In this paper, the findings of these two research steps are interpreted to propose design recommendations for precast concrete diaphragms in long floor span construction. These recommendations include provisions for diaphragm design strength, allowable flexibility, and ductility capacity based on seismic performance requirements.

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NEHRP Recommended Seismic Provisions for New

RP3-4.3.9 Diaphragm Seismic Design Methodology (DSDM).....59 RP3-4.4 Seismic Design Procedure for Precast Concrete Diaphragms.....61 RP3-4.5 Comparison of the DSDM Design methodology with the Restrepo-Rodriquez

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PCI DESIGN HANDBOOK

Page 2–30, below “Appendix B—Design for Structural Integrity and Disproportionate Collapse”: Replace “See end of Appendix for notation used.” with “Not included.” Page 2–30, below “Appendix C—Precast Concrete Diaphragm Design in Accordance with Alternative Provisions of

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Development of New Seismic Design Provisions ... - Concrete

Jun 01, 2005  The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design ...

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Seismic Design Of Floor Diaphragms Springer

provisions of Older Structures, Part 1 - Provisions, various seismic design standards such as mc FEMA-302, Federal Emergency 2000, UBC-97, FEMA-273/274 and ATC-40 Management Agency, 1997. On the Development of Seismic Design Forces for Flexible Floor Diaphragms in Reinforced Concrete Wall Buildings-Jorge Alberto Rivera 2009

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Minnesota Concrete Council ACI Local Chapter Tech Talk ...

Oct 08, 2019  New provisions for the design of precast concrete diaphragms are coming in IBC 2018. These provisions are based on an alternate design methodology in ASCE 7-16 that is mandatory for precast concrete diaphragms assigned to Seismic Design Categories C, D, E, and F.

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Wall-diaphragm interactions in seismic response of single ...

In 2016, based on the work of Ghosh , Fleischman et al. , Rodriguez et al. , Panagiotou et al. and Chen et al. , primarily related to research on pre-cast and reinforced concrete diaphragms, ASCE 7 adopted an additional alternative diaphragm design procedure that introduced a new prediction for the elastic diaphragm forces and a new response ...

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Proposed Revisions to 1997 NEHRP Recommended Provisions ...

Abstract. This is the third in a series of three papers discussing significant modifications expected to be included in the 2000 NEHRP Provisions, dealing with the design of precast, prestressed concrete seismic-force-resisting systems. The first article presented an historical review of the development of the NEHRP Provisions while the second ...

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March 17 BSSC Webinar to Address Precast Concrete ...

Feb 16, 2017  The free webinar, “Seismic Design of Precast Concrete Structures,” will be held Friday, March 17, 2017, from 2:00 pm to 3:00 pm ET (11:00 am to 12:00 pm PT). The webinar highlights the National Earthquake Hazards Reduction Program (NEHRP) 2015 NEHRP Recommended Seismic Provisions for Buildings and Other Structures , as well as its ...

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Design Of Floor Diaphragms In Multi Storey Timber Buildings

Manual: Building design examples: light frame, masonry and tilt-upAnalytical Development of Capacity Design Factors for a Precast Concrete Diaphragm Seismic Design MethodologyEarthquake Resistant Building Design and ConstructionThe Analysis of Irregular Shaped Structures Diaphragms and Shear WallsACI Structural Journal3rd U.S.-Japan

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Seismic Design of Precast Concrete Diaphragms

of these. Concrete diaphragms can be conventionally reinforced or prestressed, and can be cast-in-place concrete slabs (often post-tensioned), topping slabs on metal deck or precast concrete, or interconnected precast concrete slabs without topping, though the last system has not been used much in structures assigned to SDC D, E, or F.

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Gene R. Stevens, P.E. and James Robert Harris, P.E., Ph.D.

Chapter 7, Precast Concrete Design 1Note that this equation is incorrectly numbered as 5.2.5.4 in the first printing of the 2000 Provisions. 7-5 7.1 HORIZONTAL DIAPHRAGMS Structural diaphragms are horizontal or nearly horizontal elements, such as floors and roofs, that transfer

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STRUCTURAL T PERFORMANCE

AFPA (now AWC) Special Design Provisions for Wind and Seismic - 3.0 NA 1 EDO is precast concrete diaphragm Elastic Design Option. 2 BDO is precast concrete diaphragm Basic Design Option. 3 RDO is precast concrete diaphragm Reduced Design Option. a Flexure-controlled and Shear-controlled diaphragms are defined in ASCE 7-16 Section 11.2.

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Seismic Design Recommendations for Precast Concrete ...

This report focuses on the seismic design of precast concrete diaphragms. ... This paper provides background and discussion of the new code provisions, along with a design example illustrating the ...

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On-Demand Course: Seismic Design of Precast Concrete ...

First, a new Section 12.10.3, Alternative Design Provisions for Diaphragms including Chords and Collectors, has been added to Section 12.10, Diaphragm Chords and Collectors. The new section provides for an alternative determination of diaphragm design force level, which is mandatory for precast concrete diaphragms in buildings assigned to ...

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Diaphragms and Collectors Seismic Loads

Mar 26, 2020  Diaphragm forces caused by both inertial and system effects are included. ASCE 7-16 has introduced a new Section 12.10.3: Alternative Design Provisions for Diaphragms, Including Chords and Collectors. It is mandatory for precast concrete diaphragms in Seismic Design

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(PDF) Seismic Design of Precast Concrete Diaphragms: A ...

Seismic design of precast concr ete diaphragms: A guide for practicing engi neers, GCR 17 -917-47, NEHRP Seismic Design Technical Brief No. 13, produced by

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Webinar: Seismic Design of Precast Concrete Diaphragms ...

Feb 12, 2019  This webinar will explain the alternative diaphragm design force level as well as the precast diaphragm design procedure of ASCE 7-16, which has now been adopted by ACI 318-19, which in turn references two new standards developed by ACI Committee 550: ACI 550.4, Qualification of Precast Concrete Diaphragm Connections and Reinforcement at Joints for Earthquake Loading and

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What’s New in ACI 318-19: Building Code Requirements for ...

Aug 01, 2019  New ACI standards (the ACI 550 series) reflect changes made to the 2016 edition of ASCE 7, which incorporated new provisions that called for significant increases in seismic design forces for precast diaphragms. It established new requirements for the design and detailing of precast concrete diaphragms, particularly the connections between ...

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Proposed Revisions to 1997 NEHRP Recommended Provisions ...

Abstract. This is the third in a series of three papers discussing significant modifications expected to be included in the 2000 NEHRP Provisions, dealing with the design of precast, prestressed concrete seismic-force-resisting systems. The first article presented an historical review of the development of the NEHRP Provisions while the second ...

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Seismic Design Of Floor Diaphragms Springer

provisions of Older Structures, Part 1 - Provisions, various seismic design standards such as mc FEMA-302, Federal Emergency 2000, UBC-97, FEMA-273/274 and ATC-40 Management Agency, 1997. On the Development of Seismic Design Forces for Flexible Floor Diaphragms in Reinforced Concrete Wall Buildings-Jorge Alberto Rivera 2009

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Important Developments in the Seismic Design of Diaphragms

First, a new Section 12.10.3, Alternative Design Provisions for Diaphragms including Chords and Collectors, has been added to Section 12.10, Diaphragm Chords and Collectors. The new section provides for an alternative determination of diaphragm design force level, which is mandatory for precast concrete diaphragms in buildings assigned to ...

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Wall-diaphragm interactions in seismic response of single ...

In 2016, based on the work of Ghosh , Fleischman et al. , Rodriguez et al. , Panagiotou et al. and Chen et al. , primarily related to research on pre-cast and reinforced concrete diaphragms, ASCE 7 adopted an additional alternative diaphragm design procedure that introduced a new prediction for the elastic diaphragm forces and a new response ...

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Changes in ACI 318 Code Provisions for Earthquake ...

Provisions for Earthquake-Resistant Structures, Part 2 Changes in sections governing the design of walls, diaphragms, foundations, and members that are not designated as part of the seismic force-resisting system by S.K. Ghosh and Andrew W. Taylor “B uilding Code Requirements for Structural Concrete and Commentary (ACI 318-19)”

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