6/28/2019 0 Comments Aci 318, Section 17.2.3.4.2,The restrictions on the strength of reinforcement in ACI 318-08 Building Code Requirements for Structural Concrete, adopted by the 2009 IBC, are not clear to many engineers. This article presents a table to clearly point out and discuss the restrictions. In the table, fy is the specified yield strength of reinforcement and fyt is the specified yield strength of transverse reinforcement.
Nov 6, 2014 - Section D.3.3 and adopt the 2015 IBC Section 1905.1.8, ACI 318, Section. 17.2.3.4.2 - Where the tensile component of the strength-level. Re: aci 318-05, 7.12.2.1 JAE (Structural) 11 Mar 11 15:17 It is a bottom limit based on the (c) portion of that provision - so if you are using higher strength rebar, this creates a minimum when the (c) forumla puts you below 0.0014. S.K. Ghosh Associates Inc. is a structural seismic and code consulting firm located in Palatine, Ill., and Aliso Viejo, Calif. Presidents S. K. Ghosh, Ph.D., and Susan Dowty, S.E., are active in the development and interpretation of national structural code provisions. They can be contacted at [email protected] and [email protected], respectively, or at www.skghoshassociates.com. The text of ACI 318 shall be modified as indicated in Sections 1905.1.1 through 1905.1.8. Modify existing definitions and add the following definitions to ACI 318, Section 2.3. DESIGN DISPLACEMENT. Total lateral displacement expected for the design-basis earthquake, as specified by Section 12.8.6 of ASCE 7. DETAILED PLAIN CONCRETE STRUCTURAL WALL. A wall complying with the requirements of Chapter 14, including 14.6.2. ORDINARY PRECAST STRUCTURAL WALL. A precast wall complying with the requirements of Chapters 1 through 13, 15, 16 and 19 through 26. ORDINARY REINFORCED CONCRETE STRUCTURAL WALL. A cast-in-place wall complying with the requirements of Chapters 1 through 13, 15, 16 and 19 through 26. ORDINARY STRUCTURAL PLAIN CONCRETE WALL. A wall complying with the requirements of Chapter 14, excluding 14.6.2. SPECIAL STRUCTURAL WALL. A cast-in-place or precast wall complying with the requirements of 18.2.4 through 18.2.8, 18.10 and 18.11, as applicable, in addition to the requirements for ordinary reinforced concrete structural walls or ordinary precast structural walls, as applicable. Where ASCE 7 refers to a “special reinforced concrete structural wall,” it shall be deemed to mean a “special structural wall.” Modify ACI 318 Sections 18.2.1.2 and 18.2.1.6 to read as follows:
Special moment frames and special structural walls shall also satisfy 18.2.4 through 18.2.8. Modify ACI 318, Section 18.5 by adding new Section 18.5.2.2 and renumbering existing Sections 18.5.2.2 and 18.5.2.3 to become 18.5.2.3 and 18.5.2.4, respectively.
Modify ACI 318, Section 18.11.2.1 to read as follows:
Modify ACI 318, Section 18.13.1.1 to read as follows:
Modify ACI 318, Section 14.6 by adding new Section 14.6.2 to read as follows:
Delete ACI 318, Section 14.1.4 and replace with the following:
Modify ACI 318 Sections 17.2.3.4.2, 17.2.3.4.3(d) and 17.2.3.5.2 to read as follows:
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