A pre-tensioned centrifugal concrete pillar includes a concrete body, a steel cage including a plurality of pre-stressed rebars, a plurality of stirrups; and two plates, the rebars are steel strands, a plurality of conical through holes are provided on the plate, and multiple clips are disposed inside each conical through hole, each clip having a toothed inner surface, the multiple clips are spliced together to form a chock assembly for clamping each steel strand, and a peripheral surface of the chock assembly has a conical surface; a clamping hole is formed in the center of the chock assembly, the steel strand passes through a clamping hole and is clamped tightly. A method for manufacturing a pre-tensioned centrifugal concrete pillar is also included.

A pre-tensioned centrifugal concrete pillar includes a concrete body, a steel cage including a plurality of pre-stressed rebars, a plurality of stirrups; and two plates, the rebars are steel strands, a plurality of conical through holes are provided on the plate, and multiple clips are disposed inside each conical through hole, each clip having a toothed inner surface, the multiple clips are spliced together to form a chock assembly for clamping each steel strand, and a peripheral surface of the chock assembly has a conical surface; a clamping hole is formed in the center of the chock assembly, the steel strand passes through a clamping hole and is clamped tightly. A method for manufacturing a pre-tensioned centrifugal concrete pillar is also included.

A precast segment suitable for block-stacking concept is disclosed. The precast segment includes a first surface, an opposite second surface, plural through holes, and plural male-female connecting sets. The through holes extend from the first surface and toward the second surface to communicate between the first surface and the second surface. Each male-female connecting set includes a shear key and a joint hole, wherein the shear key protrudes from one of the first surface and the second surface to serve as a male connecting unit, and the joint hole is formed in the other of the first surface and the second surface to serve as a female connecting unit. Accordingly, the precast segments can be block-stacked by mortise-and-tenon joints to construct a bridge pier system. Compared to the conventional construction methodology, the present invention can enhance the efficiency of segment fabrication and avoid high prestress force.

A precast segment suitable for block-stacking concept is disclosed. The precast segment includes a first surface, an opposite second surface, plural through holes, and plural male-female connecting sets. The through holes extend from the first surface and toward the second surface to communicate between the first surface and the second surface. Each male-female connecting set includes a shear key and a joint hole, wherein the shear key protrudes from one of the first surface and the second surface to serve as a male connecting unit, and the joint hole is formed in the other of the first surface and the second surface to serve as a female connecting unit. Accordingly, the precast segments can be block-stacked by mortise-and-tenon joints to construct a bridge pier system. Compared to the conventional construction methodology, the present invention can enhance the efficiency of segment fabrication and avoid high prestress force.

Systems for reinforcement of structural elements such as piles, posts, pillars, and pipes are disclosed. The present invention features reinforced structural elements. The reinforced structural elements may include a sleeve structure positioned around a length of the structural element such that there is a chamber between the structural element and the sleeve structure. This chamber may be filled with concrete or another core filler material so as to reinforce the structural element. The sleeve structures of the present invention may be formed by the assembly of multiple staggered segmented layers of coupled reinforcing shells such as rigid, semi-rigid, or flexible fiber-reinforced shells.

Systems for reinforcement of structural elements such as piles, posts, pillars, and pipes are disclosed. The present invention features reinforced structural elements. The reinforced structural elements may include a sleeve structure positioned around a length of the structural element such that there is a chamber between the structural element and the sleeve structure. This chamber may be filled with concrete or another core filler material so as to reinforce the structural element. The sleeve structures of the present invention may be formed by the assembly of multiple staggered segmented layers of coupled reinforcing shells such as rigid, semi-rigid, or flexible fiber-reinforced shells.

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.

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.

In a broad aspect of the present disclosure there is provided a reinforcing member for reinforcing a concrete structure, methods of manufacturing the member and a composite concrete column comprising the member for reinforcing concrete structures. The member has a longitudinally extending elongate rod comprising a fiber reinforced polymer. A tubular sheath is spaced apart from and extending around the elongate rod so as to define a volume thereabout. The volume is filled with substantially incompressible material.

In a broad aspect of the present disclosure there is provided a reinforcing member for reinforcing a concrete structure, methods of manufacturing the member and a composite concrete column comprising the member for reinforcing concrete structures. The member has a longitudinally extending elongate rod comprising a fiber reinforced polymer. A tubular sheath is spaced apart from and extending around the elongate rod so as to define a volume thereabout. The volume is filled with substantially incompressible material.