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Two Related Articles–Seismic Behavior of Lightweight Concrete Columns and Test of Ductile Behavior of Lightweight Concrete Columns for Seismic Design

• ID:

  919

• ESCSI:

  4326.006

• Author:

  Rabbat, Basile, et al.; Hanson, N.W. and B.G. Rabbat

• Publication Name:

  1-Report to National Science Foundation; 2-Meeting Paper

• Type of Publication:

  Paper

• Publisher:

  Portland Cement Association

• Dated:

  1982

• Issue/Volume:

  1-Sept 1982, 2-after 9-82

• Other ID:

• Page(s):

  1 - 545-552

• Reference List:

  Y

• Abstract:

  1. Sixteen full-scale column beam assemblies were tested. They represented a portion of a frame subjected to simulated seismic loading. Controlled test parameters included concrete type, column size, amount of main column axial load. The columns were subjected to constant axial load and slow moment reversals at increasing inelastic deformations. Test data showed that properly designed lightweight concrete columns maintained ductility and strength when subjected to large inelastic deformations from load reversals. Confinement requirements for mormal weight concrete columns are shown to be applicable to lightweight concrete columns up to 30% of the column design strength. Supplementary crossties engaging the column steel may be used to confine the core of lightweight and normal weight concrete columns.
  2. Restrictions on column hinging and on the strength of lightweight aggregate concrete for seismic resistant design are presently being considered for several building codes in the USA. Restrictions are based on lack of data. An experimental investigation was conducted to develop needed data for columns subject to simulated seismic forces. Both lightweight and normal weight concretes were included. Properly detailed columns made with lightweight concrete performed as well as columns made with normal weight concrete when subjected to moment reversals.