Reinforced structural column system
Improved structural column assemblies and related fabrication methods are provided. More particularly, the present disclosure provides improved systems/methods for the design and fabrication of structural column assemblies having improved mechanical properties and/or improved resistance to multiple hazards (e.g., earthquakes, blasts, high temperatures, etc.). Disclosed herein is a structural column assembly having a uniquely designed fiber reinforced polymer (FRP) tube filled with concrete to be used as a structural column (e.g., in bridge and/or building construction). The exemplary composite or FRP tube can include layers of metallic and/or non-metallic fibers wound at improved/optimized angles. A multi-hazard resilient column system which can negate the need for additional concrete reinforcement or formwork at construction sites is provided. The novel tube is highly resistant to corrosive environments, and will facilitate accelerated bridge construction (ABC), while providing a solution for columns at risk from multiple hazards.
1. A structural column assembly comprising:
a concrete core having an outer surface and defining a central axis, the concrete core containing no metallic reinforcing material; and
a reinforced polymer shell that includes a polymeric material, non-metallic fibers and metallic fibers or strips, the reinforced polymer shell positioned around the outer surface of the concrete core;
wherein the metallic fibers or strips are substantially continuous; and
wherein the metallic fibers or strips are oriented relative to the central axis of the concrete core by at least one of (i) winding the metallic fibers or strips within the reinforced polymer shell, (ii) winding the metallic fibers or strips on a surface of the reinforced polymer shell, (iii) coiling the metallic fibers or strips within the reinforced polymer shell, (iv) coiling the metallic fibers or strips on a surface of the reinforced polymer shell; (v) positioning a mesh of the metallic fibers or strips within the reinforced polymer shell, and (vi) positioning a mesh of the metallic fibers or strips on a surface of the reinforced polymer shell.
2. The assembly of claim 1 , wherein the reinforced polymer shell is substantially circular.
3. The assembly of claim 1 , wherein the polymeric material includes heat resistant resin.
4. The assembly of claim 1 , wherein the non-metallic fibers are selected from the group consisting of glass, carbon, aramid, aromatic polyamide, and para-aramid fibers, and combinations thereof.
5. The assembly of claim 1 , wherein the metallic fibers or strips are selected from the group consisting of mild steel, high strength steel, super-elastic metallic alloy, and shape memory metallic alloy fibers or strips, and combinations thereof.
6. The assembly of claim 1 , wherein the non-metallic fibers and the metallic fibers or strips are embedded in the polymeric material.
7. The assembly of claim, wherein the reinforced polymer shell includes an outer surface; and
further comprising a layer of fire protective material positioned around the outer surface of the reinforced polymer shell.
8. The assembly of claim 1 , wherein the orientation of the non-metallic fibers is selected independently from the orientation of the metallic fibers or strips.
9. The assembly of claim 1 , wherein two or more reinforcements of the non-metallic fibers and metallic fibers or strips are wound within the reinforced polymer shell or are wound on the surface of the reinforced polymer shell.
10. The assembly of claim 1 , wherein two or more reinforcements of the non-metallic fibers and metallic fibers or strips are coiled within the reinforced polymer shell or are coiled on the surface of the reinforced polymer shell.
11. The assembly of claim 1 , wherein two or more reinforcements of the non-metallic fibers and metallic fibers or strips are oriented in a mesh pattern within the reinforced polymer shell or are oriented in a mesh pattern on the surface of the reinforced polymer shell.
12. The assembly of claim 1 , wherein one or more reinforcement of the non-metallic fibers are wound within the reinforced polymer shell or are wound on the surface of the reinforced polymer shell; and
wherein one or more reinforcement of the metallic fibers or strips are oriented in a mesh pattern within the reinforced polymer shell or are oriented in a mesh pattern on the surface of the reinforced polymer shell.
13. The assembly of claim 1 , wherein the non-metallic fibers are substantially continuous.
14. A structural column assembly comprising:
a concrete core having an outer surface, the concrete core containing no metallic reinforcing material;
a reinforced polymer shell having an outer surface, the reinforced polymer shell including a polymeric material, non-metallic fibers and metallic fibers or strips, the reinforced polymer shell positioned around the outer surface of the concrete core; and
a layer of fire protective material positioned around the outer surface of the reinforced polymer shell;
wherein the polymeric material of the reinforced polymer shell includes a resin;
wherein one or more non-metallic fibers and one or more metallic fibers or strips are embedded in the polymeric material of the reinforced polymer shell;
wherein one or more reinforcement of the non-metallic fibers are wound within the reinforced polymer shell or are wound on the surface of the reinforced polymer shell;
wherein one or more reinforcement of the metallic fibers or strips are oriented in a mesh pattern within the reinforced polymer shell or are oriented in a mesh pattern on the surface of the reinforced polymer shell; and
wherein the metallic fibers or strips and the non-metallic fibers are substantially continuous.
15. The assembly of claim 14 , wherein the reinforced polymer shell is substantially circular.