US1973741A

US1973741A - Steel structure

Info

Publication number: US1973741A
Application number: US448848A
Authority: US
Inventors: Bauer Bruno
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-03-25
Filing date: 1930-05-01
Publication date: 1934-09-18
Anticipated expiration: 1951-09-18

Description

sept.1 s,1934. y B, BAUER 1,973,741

STEEL STRUCTURE Filed May l, 1930 5 Sheets-Sheet 1 TITHIHIIIILITHHHlllIIlIllll lllllllllll VflllLllllllIllllllhllllllllll \ll|l|\lll||r Sept. 18, 1934. B, BAUER 1,973,741

STEEL STRUCTURE o 13A vsn Bmi'lvENTonr ,Filed May 1, 195o 5 Sheets-Sheet 5 R Ng BAUER a "umvENToRg By @WM lul., Atternoy.

Sept. 18, 1934. B. BAUER STEEL STRUCTURE Filed May 1, 1930 5 Sheets-Sheet 4 "Illy who @y Illfso im m O www A BE WM Nw Sept. 18, 1934. I B. BAUER 1,973,741

STEEL STRUCTURE File@ may 1. 195o 5 sheets-sheets Patented Sept. 18, 1934 UNITED STAT-ss 1 ,97a41 STEEL lSTRUC'EURE Bruno Bauer, Vienna, Austria Application May 1, 1930, SeraljNm 448,848 In AllStra. March 25, 1930 9 claims. (o1. ipv6)- The known method of erecting steel structures possesses certain advantages' in the case of superstructures. On the other hand,` it must be admitted that reinforced concrete or steel concrete structures possess also a `number ofjadvantages. Heretofore, it hasnot Abeen* possible to combine the advantages ofthe one'structure with those of ythe other. According to the present invention both types of construction are combined by erecting'the columns only of steel concrete, while the horizontal beams are constructed of only steel.

The expression steel concrete column is in tended to cover a column ofthe kind in `which vlthe concrete is used not only as a casing but also as a support and which, if desired, may be further reinforced to any amount beyond the 3% of the carrying cross sectional area contemplated in the present instance. According to the present in- 20 vention, the reinforcement in a vsteel concrete column of this type, consists of steel rods of special strength" (limit of compression at least 50% of the breaking strength)` which are rigidly connected with one another. The binding or strapping has to be such, that the concreting of' thecolumns is carried out either-during the progressive erection of the' steel structure or V after the whole construction has been erected; In :the latter case, the columns are concreted `fromloor to floor at the' same time as thesteel skeleton In the rst case, the binding or strapping is immovable `along the whole length of thecolumn reinforcing skeleton, and is vformed of steel rods:

while -in the second case the binding or strapping is Wholly or pantly movable andcompressibleon the steel-'rod skeleton. As a result the binding or strapping of the upper column does not obstruct the concreting of the column reinforcing'skele-'- .40- tons ofthe lower column. Upon completionof'the for instance 4so that the binding or0 strapping isslidableand compressible at the bottoinportion only.

vA few types of construction of the presentin` vention are 'illustrated byw'ayfof example in the `55. accompanying drawings, whichzpressiblev insuch a' manner thatl after` erecting ,Figure 1. is diagrammatic longitudinalsection of the reinforcing 'skeleton fortwo A-s'1'iperpose-d columns, the top' portion of a third column being. broken away. The binding or strapping is pulled up in the case of the Vsecond column.

Figure 2 is a'longitudinal cross section of acolumn head according rto the construction shown in Figure l.

Figure 3 is a cross sectional View, the section being taken on lines A-A of Figure 2.

Figure 4 is a persp'ectiveview of the column head according to the construction shown in Figures l, 2 and 3the individual parts being in position before Athe assembly. p

Figure 5 is a perspective View of the parts'after 70" assembly.

Figure 6 is a longitudinal sectional View, and Figure 7 a transversesectional view of a construction'- of the column head with a framework used as adistancing member', 'thesection vbeing taken on lines`B-l3 of Figure 6.v

'Figures'` 8 and 9 are perspectiveviews of the construction shownlin'Fi'gures'G and '7;' the individual parts being shown -inFigure 8 before as sembly and in Figure 9 after assembly. 8Cv

Figures 10, 1 1' and 12 show a modified construction of the` column head, Figure 10 being a-sectional elevationfFigure 11 a transverse cross sectional View, the'section being taken onlines C--C of Figure 10, and Figure l2 is a perspective view of the column r'head With the tube, used'as a distancingmember.

VFigures v13 to 16 show constructions of casings, particularly those forming the lining of concrete casings..

.Referring to theA drawings, the reinforcing skeleton of the steel concrete column consists of steel rods lof any convenient cross section, which are rigidly connected 'with eachother, and of a binding or strapping means inthe form of avcoil- 3 of rolled iron. In the construction shown in Figures 1 to 16, distancing tubes 2 are used Which are aixed to thelongitudinal reinforcing rods 1 by any welding process.v 5 designates the rigid connecting tube. A sleeve 6 is provided with inwardly extending members 7 to which the girders 8 are secured. Y

As .showninFigure 1 in connection with the bottom column, thevbinding or strapping 3 is rmly secured to the column of the steel rod` skeleton. In this case, the concretinghas to be carrie'dout during the erection of each floor.

As shown in the second column of Figure 1, the binding or strapping 3 is slidable` and; cornioo the skeleton' of the entire building, the concreting may be carried out one floor after another. It lies within the scope of the present invention to include a slidable and compressible portion only at the bottom of the binding.

In the compressed condition the diameter of the binding is, preferably and considerably larger than a corresponding circle embracing the steel rods in order that the binding firmly rests on the steel rods when in expanded condition. The tubular shape of the distancing members 2 renders it possible to keep the interior cross section clear for the concreting operation and to par'- tially telescope the distancing members of two superposed reinforcing skeletons.

The combination of bound or strapped reinforced concrete columns of great supporting capacity using common steel beams for the ceiling structure, requires the use of a binding sleeve 6, which heretofore has never been used inA connection with reinforced concrete constructions. The use of a binding sleeve prevents an interruption of the binding at the abutting place of the reinforcing skeletons and thus secures a continuous binding eifect.

As shown in the drawings, the binding sleeves 6 are also constructed to serve for carrying the ceiling beams 8. For this purpose, the binding sleeves 6 are provided with brackets 9 through which the load of the ceiling is transmitted to the steel rods. Sleeves 10, arranged on the binding sleeve 6, are preferably provided for this purpose. The binding sleeves assure concreting of the column skeletons from the one floor to the next higher floor.

In the construction shown in Figures 10, 11 and 12, counter plates 12 are secured to the longitudinal reinforcing rods 1 by welding. The tubular distancing members 2 are secured to the rods 1 by means of welding. A tubular binding 13 embraces the rods 1 and is preferably connected thereto by spot welding. The plates 14, transmitting the load of the ceiling, are screwed tothe tubes 13 which then serve as binding U plates.

Concrete columns of special strength call for particular provisions in the construction of the lining ofthe concrete casing in order to prevent disconnection between the parts.

v This can be effected in two ways, either the shell is made or concrete inthe one operation simultaneously with the concreting of the bound reinforcing skeleton, or the shell is subsequently applied merely as a lining to give a iireproof arrangement. As shown in Figures 14 and .15, the inner diameter of thejcasing is usually much larger than that of the bound column skeleton.`

wire netting'19 (Figure 14) or with a second binding 11 (Figures 5, 11, 14 and 15) of thin wire or the like, which is not used for carrying purposes but merely secures'the shell.` Further, a perforated sheet metal casing 18 (Figures 8, 9 and 16) may be used, the casing remaining in the finished building aftervthe concreting isY dressed 1 at its outside.

The casing shown in Figure 13 rests directly on the supporting binding of the reinforcingskeleton, provided the column and the shell are made in two operations. The iireproof lining 'is' applied in a second operation in any convenient manner.

For the purpose of providing a iireproof lining the second binding 11 is used (Figure 15), which is fully closed and which secures the lining concrete shell, or a wire netting 19 (Figure 14) of like construction. The

binding wires

3 and 11 are concentrically disposed and the intermediate space between the two binding members determines the lthickness ofthe reproof shell. In the casing shown in Figure l5, the core of the concrete column is produced simultaneously with the outer lining shell 15 whereby the reinforcing skeleton is concreted with the double binding by using a case 16.

The outer concrete shell however, may be made in a separate operation. As shown in Figure 13, the casing 17 of known construction directly rests on the supporting binding 3 and is used for concreting the column. After the setting of the concrete, the casing 17 is removed and another casing of larger diameter is used for the subsequent concreting of the outer lining shell. However, as shown in Figure 16, a perforated tube 18 may also be used as a casing, said tube remaining in the concrete column and being of a larger radius than the supporting binding.

I claim:

1. A skeleton frame for reinforced concrete of the character described, comprising horizontal girders, and supporting columns therefor, com-v prising upright spaced metal rods connected to said girders, spirally wound binding members embracing said rods, and a sleeve embracing the rods at their joining ends, brackets carried by the sleeve and connected' to said girders to support the latter.

2. A skeleton frame for reinforced concrete of the character described, comprising horizontal girders, and supporting columns therefor, comprising upright spaced metal rods connected to said girders, spirally wound binding members embracing said rods, tubular distancing members interposed between said rods and at the ends thereof the tubular members telescoping one within the other,

3. A skeleton frame for reinforced concrete of the character described, comprising horizontal girders, and supporting columns therefor, comprising upright spaced metal rods connected to said girders, spirally wound binding members embracing said rods each of said spiral members being extensible longitudinally and attached at its upper end only to said rods, each spiral member further being capable of being extended downwardly over the rods.

4. A skeleton frame for reinforced concrete of the character described, comprising horizontal girders, and supporting columns therefor, comprising upright spaced metal rods connected to said girders, spirally wound binding members embracing said rods, each of said spiral members being extensible longitudinally and attached at its upper end only to said rods, each spiral member further being normally of a larger diameter than the column rods embraced thereby and ca-v pable of being extended downwardly over the rods, and in which the diameter of the spiral is reduced in its extended condition to closely embrace thev rods.

5. `A skeleton framefor reinforced concrete of the character described comprising upright spacedV metal rods, a spirally wound binding embracing said rods, horizontal girders supported by said rods and a second .binding member embraclieti) ing the rods and being of a larger diameter than that of the rst binding member, the space between the rst and the second binding member being lled With concrete. i

6. A skeleton as claimed in claim 5 in which said second binding member is a spiral.

7. A skeleton as claimed in claim 5 in which said second binding member is a wire net.

8. A skeleton frame for reinforced concrete of the character described, comprising horizontal girders, and supporting columns therefor, comprising upright spaced metal rods connected to said girders, spirally wound binding members emsaid girders, spirally wound binding members embracing said rods, each of said binding members being adjustably disposed longitudinally of said rods and tubular spacing members interposed between said rods.

BRUNO BAUER.