NEHRP Clearinghouse
- Title
- Steel Beam-Column Joints in Seismic Moment Resisting Frames.
- File
- PB91217984.pdf
- Author(s)
- Tsai, K. C.; Popov, E. P.
- Source
- National Science Foundation, Washington, DC.; American Iron and Steel Inst., Washington, DC., November 1988, 452 p.
- Identifying Number(s)
- UCB/EERC-88/19
- Abstract
- Several important aspects of the behavior of MRFs under real earthquake loading are not well understood. This combined experimental and analytical research program addresses some of these important issues, focusing primarily on conventional moment connections with bolted web and welded flange details. Beam sections with a relatively large web plastic modulus were used, as experimental data for such sections is very limited. The effects of various connection details and welding procedures on the performance of nineteen full scale beam-column subassemblages were studied. In particular, the effects of reinforcing ribs as well as the use of supplementary welds between the shear tab and the beam web were assessed. In the analysis the numerical procedure and nonlinear elements used in solving the nonlinear dynamic system were studied, and a special panel zone joint element implemented into the ANSR-1 computer program in order to account for the inelastic shear deformation of panel zone joints. Several steel MRF designs for a six-story and a twenty-story office building were analyzed using various ground acceleration records. It is demonstrated that the panel zone shear deformations in a MRF designed according to the current building code can be significant and should be considered explicitly in the response analyses of a MRF under static or dynamic forces.
- Keywords
- ; Fracturing; Reinforcing; Earthquake resistant structures; Beams (Supports); Moments; Columns (Supports); Frames; Loads (Forces); Dynamic response; Joints (Junctions); Earthquake engineering; Shear stress; Structural steels; Stiffness; Nonlinear systems; Structural members; Fractures (Materials)