Abstract
The effectiveness of intentionally damaged full-size timber bridge members repaired by shear spiking was examined experimentally. Pultruded fibre-glass composite rods are inserted vertically through areas of damage to rejuvenate the horizontal shear properties of timber members. An epoxy-resin adhesive is used to bond the fibre-glass shear spikes to the wood and partially fill adjacent cracks and decay voids. Eight full-size railroad bridge timber stringers were intentionally damaged by partial or complete saw cuts through the width of the members to simulate minor and major deterioration, after which they were stiffened through the process of shear spiking. Although minor damage had much lower initial effects than major damage, significant percentage recovery of lost stiffness occurred in all members.
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