InTrans / Aug 14, 2018

Dynamic evaluation and testing of timber highway bridges

The dynamic response of glued laminated timber (glulam) girder bridges, longitudinal glulam deck bridges (longitudinal) and stress laminated (stress-lam) deck bridges has been determined from field test results using a heavily loaded truck. Deflections were measured for various vehicle speeds and transverse positions at the bridge midspan and were recorded
using a high speed data acquisition system. A dynamic amplification factor (DAF) was computed from these data. The tests were part of a field testing program as part of a larger research study that includes analytical research as well. The experimental data described in this paper is only part of the data measured during the field testing which will be used to validate analytical models. The overall objective of the larger study is to determine the dynamic behavior of wood bridges
so that reliable design specifications can be developed.