Deconstructable support column structures
View Patent ↗Disclosed herein are support column structures which can be used to support bridges, buildings or other structures. In some cases, a support column structure can be deconstructable and include one or more removable elements. In some cases, a support column structure can include shape memory alloy reinforcing bars. In some cases, a removable element of a support column structure can include an engineered cementitious composite. In some cases, a removable element includes one or more sleeves to separate an engineered cementitious composite from one or more shape memory alloy reinforcing bars. Methods include assembling and disassembling a support column structure.
1. A support column structure, comprising:
a base portion;
a column portion having a plurality of first reinforcing bars extending from the column portion;
a removable portion disposed between the base portion and the column portion and comprising a main body portion, a first plate, and a second plate, the main body portion disposed between the first and second plates, the first plate comprising a plurality of first openings and a plurality of second openings spaced from the first openings, the second plate comprising a plurality of third openings aligned with the second openings of the first plate; and
a plurality of second reinforcing bars,
wherein the first reinforcing bars extend through respective ones of the first openings of the first plate and removably couple the removable portion to the column portion, and the first reinforcing bars are spaced from the base portion, and
wherein the second reinforcing bars extend through respective ones of the second openings of the first plate, extend through respective ones of the third openings of the second plate, and removably couple the removable portion to the base portion, and the second reinforcing bars are spaced from the column portion.
2. The support column structure of claim 1 , wherein:
the removable portion further comprises a plurality of sleeves extending from the first plate to the second plate, and the sleeves receive respective ones of the second reinforcing bars and separate the second reinforcing bars from the main body portion of the removable portion such that the second reinforcing bars are not in contact with the main body portion of the removable portion, wherein the sleeves comprise a cardboard material such that the sleeves transfer compressive forces to the main body portion,
the column portion comprises a plurality of first recesses, and
the second reinforcing bars are disposed within respective ones of the first recesses of the column portion and are not in contact with the column portion surrounding the first recesses.
3. The support column structure of claim 2 , further comprising a plurality of shim elements, and at least one of the shim elements is disposed radially between each of the second reinforcing bars and the respective sleeve.
4. The support column structure of claim 1 , wherein a plurality of first nuts is situated on respective first end portions of each of the first reinforcing bars, thereby removably coupling the removable portion to the column portion, and a plurality of second nuts is situated on respective second end portions of each of the second reinforcing bars, thereby removably coupling the removable portion to the base portion.
5. The support column structure of claim 2 , wherein the column portion comprises a central, second recess, the base portion comprises a central, third recess, and the removable portion further comprises a central longitudinal pipe extending from the second recess of the column portion, through the first plate, through the main body portion, through second plate, and to the third recess of the base portion, wherein the pipe is spaced from the an end surface of the third recess such that the pipe can resist relative shear forces between the base portion and the removable portion and such that the removable portion can transfer compressive forces on the column portion from the column portion to the base portion.
6. The support column structure of claim 1 , wherein the second reinforcing bars comprise a shape memory alloy.
7. A method of assembling the support column structure of claim 1 , comprising:
positioning the base portion to act as a foundation for the support column structure;
coupling the second reinforcing bars to the base portion;
situating the removable portion on the base portion such that the second reinforcing bars extend through the main body portion of the removable portion;
coupling the second reinforcing bars to the removable portion such that the removable portion is restrained against movement with respect to the base portion;
situating the column portion on the removable portion; and
coupling the column portion to the removable portion with the first reinforcing bars such that the column portion is restrained against movement with respect to the removable portion.
8. The method of claim 7 , wherein the second reinforcing bars comprise a shape memory alloy.
9. The method of claim 7 , wherein coupling the second reinforcing bars to the base portion comprises threading each of the reinforcing bars into a respective coupling element of the base portion.
10. The method of claim 7 , wherein coupling the second reinforcing bars to the removable portion comprises threading a nut onto a first end portion of each of the second reinforcing bars.
11. The method of claim 7 , wherein:
situating the column portion on the removable portion comprises inserting the first reinforcement bars of the column portion through respective ones of the first openings of the removable portion; and
coupling the column portion to the removable portion comprises threading a nut onto a first end portion of each of the first reinforcement bars of the column portion.
12. The support column structure of claim 1 , wherein the main body portion of the removable portion comprises an engineered cementitious composite.
13. The support column structure of claim 1 , wherein the main body portion of the removable portion comprises an elastomeric material.
14. A support column structure, comprising:
a reinforced concrete base portion having a top portion and a plurality of first reinforcing bars;
a reinforced concrete column portion having a bottom portion and a plurality of second reinforcing bars;
a removable portion comprising a main body portion, a first plate, a second plate, and a plurality of sleeves, wherein the main body portion and the sleeves are disposed axially between the first and second plates; and
a plurality of third reinforcing bars,
wherein each of the second reinforcing bars of the column portion extends from the bottom portion of the column portion and is removably coupled to the first plate of the removable portion,
wherein each of the third reinforcing bars extends through the first plate of the removable portion, through a respective sleeve of the removable portion, through the second plate of the removable portion, to the top portion of the base portion, and each of the third reinforcing bars is removably coupled to a respective first reinforcing bar of the base portion,
wherein the sleeves separate the respective third reinforcing bars from the main body portion of the removable portion such that the third reinforcing bars are not in contact with the main body portion of the removable portion,
wherein the first reinforcing bars are axially aligned with the third reinforcing bars, and the first reinforcing bars are axially offset relative to the second reinforcing bars, and
wherein the first and third reinforcing bars are spaced from the column portion such that the first and third reinforcing bars are not directly coupled to the column portion, and the second reinforcing bars are spaced from the base portion such that the second reinforcing bars are not directly coupled to the base portion.
15. The support column structure of claim 14 , wherein the sleeves structurally separate the third reinforcing bars from the main body portion such that forces cannot be directly transferred between the third reinforcing bars and the main body portion.
16. The support column structure of claim 14 , wherein the main body portion of the removable portion comprises an engineered cementitious composite having a compressive strength of 5 ksi to 9 ksi and a tensile strain capacity of 3 percent to 7 percent.
17. The support column structure of claim 14 , wherein the first plate extends radially outwardly beyond the second plate, and the second reinforcing bars are disposed radially outwardly relative to the first and third reinforcing bars.
18. The support column structure of claim 14 , wherein:
the base portion comprises a plurality of coupling elements situated within the top portion of the base portion and coupled to the first reinforcing bars;
each of the coupling elements has a respective annular top portion having inner threads formed therein;
each of the third reinforcing bars comprises a respective bottom portion having outer threads formed therein; and
the bottom portion of each of the third reinforcing bars is threaded into a respective one of the coupling elements.
19. The support column structure of claim 14 , wherein the main body portion of the removable portion comprises an elastomeric material.