Connection of precast concrete panels and walls using near surface mounted bars
Systems and methods for connection between precast concrete elements are provided. Near-surface mounting bars (NSMBs) can be used to connect panel elements (e.g., decks and/or slabs), concrete walls, retaining walls, and/or abutments. A straight or butt connection can be used for panel and wall elements, and a staggered or lap connection can be used for panel elements. The connection systems offer new ways for connecting precast concrete walls and deck panels.
1. A method for connecting precast concrete elements, the method comprising:
casting a first precast concrete element, the first precast concrete element having a first connection end configured to connect to a second precast concrete element, and the first precast concrete element further having first grooves formed on a first surface of the first precast concrete element and on a second surface of the first precast concrete element opposite from the first surface;
casting the second precast concrete element, the second precast concrete element having a second connection end configured to connect to the first connection of the first precast concrete element, and the second precast concrete element further having second grooves formed on a third surface of the second precast concrete element and on a fourth surface of the second precast concrete element opposite from the third surface;
applying a first adhesive to at least one of the first connection end of the first precast concrete element and the second connection end of the second precast concrete element;
disposing the first precast concrete element near the second precast concrete element such that the first connection end is adjacent to the second connection end and the first grooves align with the second grooves, the first grooves and the second grooves forming a plurality of third grooves such that each third groove comprises one first groove and one second groove aligned with the respective one first groove;
applying pressure such that the first connection end and the second connection end are pushed towards each other;
disposing a plurality of near-surface mounting bars (NSMBs) in the plurality of third grooves, respectively; and
applying a second adhesive to the third grooves,
each of the first precast concrete element and the second precast concrete element being either: a) a panel element; or b) a wall element,
the first connection end being a male hexagonal butt end,
the second connection end being a female hexagonal butt end,
the first precast concrete element further having a fifth surface connecting the first surface and the second surface, and a sixth surface opposite from the fifth surface and connecting the first surface and the second surface,
the second precast concrete element further having a seventh surface connecting the third surface and the fourth surface and an eighth surface opposite from the seventh surface and connecting the third surface and the fourth surface,
the first connection end of the first precast concrete being connected to both the fifth surface and the sixth surface of the first precast concrete element
the second connection end of the second precast concrete being coned to both the seventh surface and the eighth surface of the second precast concrete element
the fifth surface and the sixth surface of the first precast concrete element both being free of any grooves, and
the seventh surface and the eighth surface of the second precast concrete element both being free of any grooves.
2. The method according to claim 1 , each of the first precast concrete element and the second precast concrete element being a panel element.
3. The method according to claim 1 , each of the first precast concrete element and the second precast concrete element being a wall element.
4. The method according to claim 1 , each NSMB comprising carbon fiber reinforced polymer (CFRP).
5. The method according to claim 1 , the first adhesive comprising a first grout, and the second adhesive comprising a second grout.
6. The method according to claim 1 , further comprising:
before applying the first adhesive, transporting the first precast concrete element and the second precast concrete element to a location where they will be used in a construction structure.
7. The method according to claim 1 , further comprising:
after applying the second adhesive, allowing the second adhesive to cure before applying any load to the connected first precast concrete element and second precast concrete element.
8. A system for connecting precast concrete elements, the system comprising:
a first precast concrete element, the first precast concrete element having a first connection end configured to connect to a second precast concrete element, and the first precast concrete element further having first grooves formed on a first surface of the first precast concrete element and on a second surface of the first precast concrete element opposite from the first surface;
the second precast concrete element, the second precast concrete element having a second connection end configured to connect to the first connection of the first precast concrete element, and the second precast concrete element further having second grooves formed on a third surface of the second precast concrete element and on a fourth surface of the second precast concrete element opposite from the third surface;
a first adhesive configured to be applied to at least one of the first connection end of the first precast concrete element and the second connection end of the second precast concrete element;
a plurality of near-surface mounting bars (NSMBs); and
a second adhesive,
the first precast concrete element and the second precast concrete element being configured such that, when the first connection end is disposed adjacent to the second connection end, the first grooves align with the second grooves to form a plurality of third grooves such that each third groove comprises one first groove and one second groove aligned with the respective one first groove,
the plurality of NSMBs being configured to be disposed in the plurality of third grooves, respectively,
the second adhesive being configured to be applied to the third grooves after the NSBMs are respectively disposed therein,
each of the first precast concrete element and the second precast concrete element being either: a) a panel element; or b) a wall element,
the first connection end being a male hexagonal butt end,
the second connection end being a female hexagonal butt end,
the first precast concrete element further having a fifth surface connecting the first surface and the second surface, and a sixth surface opposite from the fifth surface and connecting the first surface and the second surface,
the second recast concrete element further having a seventh surface connecting the third surface and the fourth surface and an eighth surface opposite from the seventh surface and connecting the third surface and the fourth surface,
the first connection end of the first precast concrete being connected to both the fifth surface and the sixth surface of the first precast concrete element,
the second connection end of the second precast concrete being connected to both the seventh surface and the eighth surface of the second precast concrete element,
the fifth surface and the sixth surface of the first precast concrete element both being free of any grooves, and
the seventh surface and the eighth surface of the second precast concrete element both being free of any grooves.
9. The system according to claim 8 , each of the first precast concrete element and the second precast concrete element being a panel element.
10. The system according to claim 8 , each of the first precast concrete element and the second precast concrete element being a wall element.
11. The system according to claim 8 , each NSMB comprising carbon fiber reinforced polymer (CFRP).
12. A method for connecting precast concrete elements, the method comprising:
casting a first precast concrete element, the first precast concrete element having a first connection end configured to connect to a second precast concrete element, and the first precast concrete element further having first grooves formed on a first surface of the first precast concrete element and on a second surface of the first precast concrete element opposite from the first surface;
casting the second precast concrete element, the second precast concrete element having a second connection end configured to connect to the first connection of the first precast concrete element, and the second precast concrete element further having second grooves formed on a third surface of the second precast concrete element and on a fourth surface of the second precast concrete element opposite from the third surface;
transporting the first precast concrete element and the second precast concrete element to a location where they will be used in a construction structure
after transporting the first precast concrete element and the second precast concrete element to the location, applying a first adhesive to at least one of the first connection end of the first precast concrete element and the second connection end of the second precast concrete element;
disposing the first precast concrete element near the second precast concrete element such that the first connection end is adjacent to the second connection end and the first grooves align with the second grooves, the first grooves and the second grooves forming a plurality of third grooves such that each third groove comprises one first groove and one second groove aligned with the respective one first groove;
applying pressure such that the first connection end and the second connection end are pushed towards each other;
disposing a plurality of near-surface mounting bars (NSMBs) in the plurality of third grooves, respectively;
applying a second adhesive to the third grooves; and
allowing the second adhesive to cure before applying any load to the connected first precast concrete element and second precast concrete element,
the first connection end being a first butt end,
the second connection end being a second butt end,
the first precast concrete element being a male precast concrete element,
the second precast concrete element being a female precast concrete element,
the first butt end being a male hexagonal butt end,
the second butt end being a female hexagonal butt end,
each of the first precast concrete element and the second precast concrete element being either: a) a panel element; or b) a wall element,
the first precast concrete element further having a fifth surface connecting the first surface and the second surface and a sixth surface opposite from the fifth surface and connecting the first surface and the second surface,
the second precast concrete element further having a seventh surface connecting the third surface and the fourth surface and an eighth surface opposite from the seventh surface and connecting the third surface and the fourth surface,
the first connection end of the first precast concrete being connected to both the fifth surface and the sixth surface of the first precast concrete element
the second connection end of the second precast concrete being connected to both the seventh surface and the eighth surface of the second precast concrete element,
the fifth surface and the sixth surface of the first recast concrete element both being free of any grooves and
the seventh surface and the eighth surface of the second precast concrete element both being free of any grooves.