Center supported bond joint
A center support sleeve for a bonded rail joint bar that includes a body having a head portion, a web portion, and a base portion. The head portion depends from the web portion, which depends from the base portion. The head portion and the base portion are bent in the same direction thereby defining a recess area therebetween. The web portion of the body also defines a plurality of holes.
1. A rail joint assembly, comprising:
first and second railroad rails having abutting ends;
a rail joint bar attached to the abutting railroad rails, the rail joint bar including a body having a front surface and a back surface and defining a head section, a web section depending from the head section, and a base section depending from the web section; the web section having a plurality of holes defined in the body, wherein the holes are adapted to receive fasteners for securing a rail joint bar to two abutting railroad rails;
a center support sleeve made of an electrically-insulating material sandwiched between a center portion of the back surface of the body of the rail joint bar and the two abutting railroad rails, the support sleeve positioned intermediate of ends of the rail joint bar and extending across the abutting ends of the first and second railroad rails, wherein the support sleeve is adapted to spread impact loads of rail cars away from a center portion of the rail joint bar;
shapeable fiberglass mattings positioned between the back surface of the body of the rail joint bar and the first and second railroad rails at lateral portions of the rail joint bar and adjacent to the center support sleeve;
a first layer of adhesive positioned between the center support sleeve and the first and second railroad rails and between the shapeable fiberglass mattings and the first and second railroad rails; and
a second layer of adhesive positioned between the center support sleeve and the rail joint bar and between the shapeable fiberglass mattings and the rail joint bar.
2. The rail joint assembly of claim 1 , wherein the center support sleeve comprises a body having a head portion, a web portion, and a base portion, the head portion depends from the web portion which depends from the base portion, wherein the head portion and the base portion define a recess area between the head portion and the base portion, and wherein the web portion of the body defines a plurality of holes adapted to receive fasteners.
3. The rail joint assembly of claim 2 , comprising a plurality of fasteners passing through the holes in the rail joint bar and the holes in the sleeve for securing the rail joint bar to the two abutting railroad rails.
4. The rail joint assembly of claim 2 , wherein the sleeve is capable of supporting a load of at least 100,000 psi tensile strength and have a compression strength of at least 70,000 psi.
5. The rail joint assembly of claim 1 , wherein the first and second layers of adhesive comprise an epoxy that is capable of creating a bond of at least 3000 psi shear strength and at least 0.001 inch per inch elasticity.
6. The rail joint assembly of claim 1 , wherein the center support sleeve comprises a body having a head portion and a web portion depending from said head portion.