ANALYTICAL MODELING OF BEAM-COLUMN JOINTS OF COMPOSITE SRC FRAME SYSTEMS

Equivalent macromodel-based analytical tools, comprised of flexibility-based element models, are used to accurately represent the non-linear moment-curvature (force-deformation) response characteristics in structural systems using columns of reinforced concrete (RC) or composite steel sections encased in reinforced concrete (SRC), strucrural steel beams, and composite beam-column joints. To facilitate the modeling of inelastic deformations in joint regions, a panel element capable of representing joint shear distortions and joint bearing deformations was developed and incorporated into an existing computer program IDARC. The inelastic shear-deformation characteristics of the joint panel were partly established from guidelines published by an ASCE Task Committee. Various hysteretic control parameters for members of the subassemblage, such as strength degradation, stiffness deterioration, and pinching (slip), were quantified based on observed experimental response. Potential failure modes in the steel beam, RC or SRC column, and composite joint of the frame subassemblage can be represented in the proposed formulation. Experimental subassemblage testing performed at Cornell University was used to validate the analytical platform. It is shown that the revised IDARC program can be used for seismic evaluation of composite structures and for development of design guidelines to ensure desirable mechanisms in RC/SRC structures.

• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Bracci, J M
  • Atahan, A O
  • Kunnath, S K
• Publication Date: 1998

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 197-212
• Monograph Title: HYBRID AND COMPOSITE STRUCTURES

Subject/Index Terms

• TRT Terms: Analysis; Composite construction; Earthquake resistant structures; Frames; Joints; Shear properties; Structural analysis; Structural design
• Uncontrolled Terms: Joints
• Old TRIS Terms: Analytical techniques; Frame design
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00754759
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 5 1998 12:00AM