Title:
Collapse of Ramp C
Author(s):
Henry G. Russell and Thomas J. Rowe
Publication:
Concrete International
Volume:
7
Issue:
12
Appears on pages(s):
32-37
Keywords:
bridges (structures); buckling; collapse; concrete
construction; failure; falsework; field tests; girders; towers.
DOI:
Date:
12/1/1985
Abstract:
A ramp of the Cline Avenue Extension Expressway collapsed during construction in 1982. Prior to collapse, the ramp was supported on a falsework system consisting of timbers, steel beams, jackscrews, steel towers, and concrete pads. Results of an investigation by Construction Technology Laboratories showed that collapse of a section of the ramp could have been initiated by differential movements at a tower base’ caused by cracking of a concrete pad or by instability of the system of upper jackscrews and steel beams. This summary describes the investigation including field inspection, review of drawings, determination of construction loads, laboratory and field tests, and analysis of the falsework system.