InTrans / Aug 14, 2018

Dynamic evaluation of timber bridges

The dynamic response of both glued-laminated timber
(glulam) girder bridges and stress-laminated (stress-lam)
deck bridges was determined from field test results using
heavily loaded trucks. 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. These field tests
are part of a larger research study that will also include
analytical research. Only some of the experimental data
are described in this paper. The overall objective of the
larger study is to determine the dynamic behavior of
timber bridges so that reliable design specifications can
be developed.