Title:
Seismic Behavior of 150 MPa (22 ksi) Concrete Flexural Elements
Author(s):
Abdelsamie Elmenshawi and Tom Brown
Publication:
Structural Journal
Volume:
107
Issue:
3
Appears on pages(s):
311-320
Keywords:
dissipated energy; ductility; flexural rigidity; high-strength concrete.
DOI:
10.14359/51663696
Date:
5/1/2010
Abstract:
An experimental program was carried out to investigate the seismic behavior of flexural elements constructed with concrete strengths up to 150 MPa (22 ksi), at which strength the literature is very scarce. Ten carefully chosen beam-column subassemblages were tested such that the column stub had no axial compressive force and was connected to the laboratory strongfloor. The beamend connected to the actuator to displace horizontally according to a predefined displacement scheme. Each specimen consisted of a 250 x 350 x 1000 mm (10 x 14 x 39 in.) beam cast monolithically with a 300 x 450 x 1050 mm (12 x 18 x 41 in.) column stub. The test variables included the concrete compressive strength (30, 70, and 150 MPa [4, 10, and 22 ksi]), the bottom/top reinforcement ratio (0.33 and 1.0), the transverse reinforcement ratio (0.8 and 1.6%), and the shear span-depth ratio (2.0 and 3.0). The research aimed at examining the cracking behavior, hysteretic behavior, energy dissipation, ductility, flexural strength, and flexural rigidity of the tested specimens.