US2618146A

US2618146A - Reinforced concrete column, bracket, and beam joint

Info

Publication number: US2618146A
Application number: US715158A
Authority: US
Inventors: Ciarlini Luigi
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-12-28
Filing date: 1946-12-10
Publication date: 1952-11-18
Anticipated expiration: 1969-11-18
Also published as: FR937679A

Description

L. ClARLlNl Nov. 18, 1952 REINFORCED CONCRETE COLUMN, BRACKET, AND BEAM JOINT Filed Dec. 10, 1946 3 Sheets-Sheet 1 Nov. 18, 1952 ClARLlNl 2,613,146

REINFORCED CONCRETE COLUMN, BRACKET, AND BEAM JOINT Filed Dec. 10, 1946 3 Sheets-Sheet 2 I NYE/V751? A 0/61 C/ARL/N/ L. CIARLINI 2,618,146

REINFORCED coucmm: COLUMN, BRACKET, AND BEAM JOINT Nov. 18, 1952 3 Sheets-Sheet 3 Filed D60. 10, 1946 I/WE/VTO/r 1 0/0 (mm //W Patented Nov. 18, 1952 REINFORCED CONCRETE COLUMN, BRACKET, AND BEAM JOINT Luigi Ciarlini, Rome, Italy Application December 10, 1946, Serial No. 715,158 In Italy December 28,1945

2 Claims. 1

I This invention relates to .a building structure composed of prefabricated reinforced concrete elements and comprising foundation piers with plinths, prefabricated reinforced concrete hollow columns inserted in said piers, prefabricated bracketsof .reinforced concrete fixed on the columns at thelevel of the various floors, prefabricatedJmain beams resting upon said brackets and fixed thereto, prefabricated secondary beams resting upon said main-beams and fixed thereto, and hollow elements of insulating material forming external walls.

The object of the invention is to provide a "building structure wherein all the constituting elements are prefabricated and connected to each other in such a manner that the finished structure has the appearance of a normal reinforced concrete building cast on the spot in accordance with the usual practice.

This object and the novel features of the invention are hereinafter more fully described and the preferred forms of construction by which this object is reached, are shown in the accompanying drawings, in which:

Fig. l is .a-diagrammatic partial side view of the skeleton of a building having the elements prefabricated;

Fig. '2 is a perspective View of a connection between columns and beams, with all the adjacent elements, partially sectioned;

Fig. '3 is a vertical section of a bracket of the type shown in Fig. 2, coupled with the pile taken on line III-1110f Fig. 4;

Fig. 4 is a plan view, partially sectioned, of the bracket shown in Fig. 3;

Fig. 5 is a perspective view of another type of bracket connected to the pile;

Fig. 6 is a diagrammatic vertical section showing the connection of the bracket of Fig. 5 with the pile;

.Fig. 7 is a'plane view, partially sectioned, of the connection shown in Fig. 6;

Fig. 8 .is'a top view of the connection between a-main beam and a secondary beam;

Fig. 9 is a section taken on line X-X of Fig. 8.

Referring to Fig. 1, the building structure comprises piers '2, provided with foundation plinths 2' having a width proportioned to the type of the .ground on which the structure is to be constructed. Into piers v2 are introduced, and fixed by means of fluid cement, columns I forming the vertical supporting structure of the building. Preferably, use is made of frusto-com'cal hollow colunms of .centrifugatedreinforced concrete, for .examplaofthe type used .forxelectric lines. The concrete section. or the, reinforcement is so deasfw correspond to. the stress conditions to '2 which they are subjected- When the building comprises more than four floors, it may be advisable to fill the hollow columns lwithconcrete after its erection. On columns 1 at the level of each floor, brackets 3 are fixed'on which the-main beams 4 are supported. These-main beams support the secondary beams 5 which in :turn support the hollow bricks 6 of the ceiling.

The brackets 3, according to the embodiment shown in Figs. 3 and '41, comprise a portion 1 provided with central hole 8, and arms 9. These brackets are heavily reinforced and comprise :a bearing surface It for the main beams and a cavity II. The arms 8 may be reinforced with metallic elements which are cast so as to leave a free space for hole 8 and for the cavity H.

The central hole of the brackets may have a diameter substantially equal to the diameter of the column at the floor to which the bracket is applied or, as shown in Fig. 4, the brackets .may be formed with a tapered central hole having its smallest diameter slightly greater than the diameter of the column and in the interval between the hole of the bracket and the column, cement concrete I2 is cast. In this manner, a wedge is obtained which, after hardening, gives, due to its form, a rigid connection between the bracket and the column.

In the case of heavy loads, and in. order to avoid any sliding of the bracket on the column, abutments may be provided on the external surface of the column at the level of the various floors.

The longitudinal connection betweenthe brackets and main beams is obtained when concrete is cast in the cavity I l of the bracket andin the recess provided in thefm'ain'beam.

Another embodiment of the connection between the column and the bracket is illustrated in Figs. 5, 6 and'l, wherein I4 denotes "a section of a reinforced concrete column, in which section the concrete has been removed so as to expose the reinforcing bars. In the interval between these reinforcing bars,reinforcing bars [5, l6, ll of the bracket are inserted (these reinforcing bars having been only diagrammatically indicated, and their position does 'not represent an actual construction). Plug ill, for instance of paper, is placed in the central hollow :of the column to obturate it. Reference numerals 19, are a U- shaped prefabricated bracket, the bottom 19 being shown in sectionand a side 20 being shown in elevational view (Fig. 7). Beam 4 whichlbears on bracket [9, 20 .is-provided with reinforcements 2i surroundinga hole 22 designed to receive the secondary beams '5, which beams 55 are thereafter fixed in the hole by means of a concrete casting;

When the connection between the bracket and the column is made according to the above modification, the columnis brought to the place of construction, the brackets having been previously fixed thereto at the levels corresponding to the floors of the building. The brackets are fixed to the column by means of concrete cast in the central portion of the column and bracket. The reinforcing bars project beyond the free ends of the bracket and are adapted to be placed between the reinforcing bars of the main beams.

After the columns having the pre-attached brackets have been erected on the foundation, the U-shaped main beams 4 are placed on the brackets and the reinforcing bars projecting from the bracket are made to pass between the reinforcing bars of the beams. The filling core of concrete is then cast into the U of the bracket and the main beam and the secondary beam are inserted into the space between the reinforcements 2|.

The connection shown in Fig. 6 has the following advantages:

(a) A continuous beam is obtained having a connection to which the desired strength may be given by properly selecting the reinforcing bars of the'column and bracket.

(b) The excessive thickening of the bracket avoided in the part which surrounds the column, it being possible to build the bracket having a width identical to the width of the beam, and to have the mounting of the walls greatly simplified.

(c) It is easier to adapt a standard bracket to cases of different loads since the reinforcing of the concrete core which is cast locally maybe changed to suit the particular conditions.

The main beams shown in Figs. 8 and 9 are -U-shaped and formed of high strength concrete suitably reinforced.

On the bottom 23 of the beam the reinforcement 24 is embodied, and in the upper part of the sides 25, the reinforcement 26 is embodied.

The ceiling structure is formed with secondary beams 5 having a cross-section proportioned to the width of the rooms. These beams are constructed with high-strength concrete and are reinforced with pre-stressed steel wires.

Their laying is made by leaving during the construction of the main beams rectangular holes '22 whereinto penetrates the end of the secondary beams. Such holes do not interfere with the reinforced part of the main beams. On the secondary beams, the bricks 6 are laid which support the banking of the floor (not shown).

The external walls, illustrated in Fig. 2, are constructed of elements 21 of light-weight material, for instance, a concrete formed of cement and pumice stone in small grains, a concrete with cellulite or similar material. The elements 2'! have a triangular section and are mounted vertically in two rows in the spaces comprised between columns and beams, the rows being spaced from each other according to the desired width of the wall, in such a manner as to 'obtain inwardly and outwardly two walls which are insulated due to the kind of material from which they are made. A space is thus obtained, without casings being needed, which may be filled with cheapmaterial 28, which might be recovery material from demolished buildings. The two rows of elements-21 are mounted staggered, leaving between them an empty, zig-zag shaped space.

I claim:

1. A building structure composed of prefabricated reinforced concrete elements comprising prefabricated hollow columns of reinforced concrete, prefabricated brackets of reinforced concrete mounted on the said columns at floor levels, each of said brackets having a central hole through which the column extends and at least two arms of U-shaped cross section, each arm having its free end in the form of an inclined surface, reinforcement bars in said brackets passing through openings in said columns and projecting from the free ends of the arms, prefabricated U-shaped main beams of reinforced concrete having their ends in the form of an inclined surface, complemental to and resting on the inclined surface of the free end of each arm of the bracket, and concrete material filling the U-shaped arms, the openings in the columns and the U-shaped main beams, thereby bonding said columns, brackets and beams together as a monolithic unit.

2. A building structure composed of prefabricated reinforced concrete elements comprising prefabricated hollow columns of reinforced concrete, prefabricated brackets of reinforced concrete mounted on the said columns at floor levels, each of said brackets having a central hole through which the column extends and at least two arms of U-shaped cross section, each arm having its free end in the form of an inclined surface, reinforcement bars in said brackets passing through openings in said-columns and projecting from the free ends of the arms, prefabricated U-shaped main beam of reinforced concrete having their ends in the form of an inclined surface, complemental to and resting on the inclined surface of the free end of each arm of the bracket opposite vertical walls of the U-shaped cross-sectioned arms of the brackets being more closely spaced at the free ends of the arms than at other portions, and opposite vertical walls of the U-shaped cross sectioned main beam being more closely spaced at their free ends than at intermediate portions, and concrete material filling the U-shaped arms, the openings in the columns and the U-shaped main beams, thereby bonding said columns, brackets and beams together as a monolithic unit.

LUIGI CIARLINI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 844,296 Winslow Feb. 12, 1907 1,299,842 Landwehr Apr. 8, 1919 1,516,074 Borg Nov. 18, 1924 1,757,077 Eiserloh May'6, 1930 1,791,645 Sproul Feb. 10, 1931 1,973,741 Bauer Sept. 18, 1934 2,057,732 Navarre Oct. 20,1936 2,392,551 Roe Jan. 8, 1946 2,414,738 Henderson Jan. 21, 1947 2,483,175 Billner Sept. 27, 19 49 FOREIGN PATENTS Number Country Date 481,825 France Oct. 27, 1917 77,084 Switzerland 1918 708,167 France July 21, 1931 318,216 Italy 1,934