TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

Full-Scale Impact Testing of Four Traffic Barriers on Top of an Instrumented MSE Wall

Accession Number:

01124953

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

This paper presents the results of 4 full scale impact tests against barriers placed on top of an instrumented MSE wall. The impact was created by a head-on collision of a 2268 kg (5000 lbs) bogie going at about 32.2 km/h (20 mph). The barriers were New Jersey and vertical wall barriers with a 1.37 m (4.5 ft) wide moment slab in 9.14 m (30 ft) long sections. The wall was 1.52 m (5 ft) high with one panel and two layers of reinforcement. The reinforcement was 2.44 m (8 ft) long strips, 4.88 m (16 ft) long strips and 2.44 m (8 ft) long bar mats. The backfill was crushed rock. The instrumentation consisted of accelerometers, strain gages, contact switch, displacement targets, string lines, and high speed cameras. The test was designed to represent a commonly used installation in current practice including an impact load on the barrier at least equal to 240 kN (54 kips). Most of the barriers sustained significant damage but overall the behavior of the wall was satisfactory since the displacements were minimal and the panel damage was acceptable except possibly in the case of the 4.88 m (16 ft) long strips. The loads measured in the reinforcement indicate that the reinforcement was brought to its ultimate capacity for the duration of the impact but since the impact duration was so short and since the displacements were within tolerable limits, this is considered acceptable. The use of the longer strips (4.88 m (16 ft) long strips) is not necessarily a good thing because, while it did lead to slightly smaller panel displacements, it also leads to higher panel stresses as evidenced by a bending crack in the panel. The 2.44 m (8 ft) long strips solution is more flexible. The measured maximum dynamic loads in the strips were found to be 3 to 5 times higher than the calculated maximum static loads by AASHTO guidelines.

Monograph Accession #:

01120148

Report/Paper Numbers:

09-2961

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Kim, Kang-Mi
Briaud, Jean-Louis
Bligh, Roger P
Abu-Odeh, Akram

Pagination:

25

Publication Date:

2009

Conference:

Transportation Research Board 88th Annual Meeting

Location: Washington DC, United States
Date: 2009-1-11 to 2009-1-15
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures; Photos; References (7) ; Tables (1)

Subject Areas:

Bridges and other structures; Highways; I24: Design of Bridges and Retaining Walls

Source Data:

Transportation Research Board Annual Meeting 2009 Paper #09-2961

Files:

TRIS, TRB

Created Date:

Jan 30 2009 7:20PM