Title:
Design Recommendations for Type 2 High-Strength Reinforced Concrete Connections
Author(s):
Mohammed R. Ehsani and Fadel Alameddine
Publication:
Structural Journal
Volume:
88
Issue:
3
Appears on pages(s):
277-291
Keywords:
beams (supports); columns (supports); connections; cyclic loads; ductility; earthquake-resistant structures; high-strength concretes; joints (junctions); reinforced concrete; shear stress; structural design; Design
DOI:
10.14359/3108
Date:
5/1/1991
Abstract:
The present recommendations of ACI-ASCE Committee 352 for the design of ductile moment-resistant beam-column connections limit the joint-shear stress. Test results of corner connections subjected to inelastic cyclic loading show that when a frame is constructed with high-strength concrete with compressive strength between 800 and 14,000 psi (55 and 97 MPa), the preceding equation becomes unconservative. In addition, the current recommendations for joint confinement, which were developed for normal strength concrete, cannot be satisfied for high-strength concrete frames. Based on the test results, new requirements for allowable joint-shear stress as well as joint confinement are presented to insure ductile behavior of frames.