SU49135A1 - The method of manufacturing reinforced concrete beams and the message to the reinforcement of its preliminary stresses - Google Patents
The method of manufacturing reinforced concrete beams and the message to the reinforcement of its preliminary stressesInfo
- Publication number
- SU49135A1 SU49135A1 SU182747A SU182747A SU49135A1 SU 49135 A1 SU49135 A1 SU 49135A1 SU 182747 A SU182747 A SU 182747A SU 182747 A SU182747 A SU 182747A SU 49135 A1 SU49135 A1 SU 49135A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- concrete
- reinforcement
- concreted
- reinforced concrete
- message
- Prior art date
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- Rod-Shaped Construction Members (AREA)
Description
Обычно армированные железом конструкции бетонируютс сло ми сразу на полную свою высоту.Usually, iron-reinforced structures are concreted with layers immediately to their full height.
Предлагаемый способ изготовлени железобетонных балок состоит в том, что бетонирование сжатой и раст нутой зоны конструкции производитс в два приема, а арматуре ее сообщаютс предварительные напр жени .The proposed method for the manufacture of reinforced concrete beams consists in that the concreting of the compressed and stretched zone of the structure is carried out in two steps, and its preliminary stresses are communicated to the reinforcement.
На чертеже фиг. 1 и 5 представл ют боковой вид забетонированной до половины балки; фиг. 2 и б - вид на балку снизу; фиг. 3 - поперечный разрез балки; фиг. 4-вид нагруженной, но еще нецобетонированной балки.In FIG. 1 and 5 are side views of a half-concreted beam; FIG. 2 and b - view of the beam from below; FIG. 3 - cross section of the beam; FIG. 4-view of a loaded, but still non-concrete beam.
Балка с уложенной арматурой бетонируетс сначала только на половину зысоты, подверженную напр жению сжати . Дл св зи арматуры с бетоном концы балки и некоторые промежутки IO длине балки бетонируютс по всей высоте (фиг. 1). Через известный промежуток времени, когда бетон приобретает необходимую прочность, наполошну забетонированна балка подвер-аетс нагрузке, достаточной, чтобы шзвать в железе напр жени , близкие с пределу текучести. В нагруженном :осто нии балка бетонируетс уже на }сю высоту. Разгрузка балки произвоштс также по приобретении бетоном {собходимой прочности.The beam with the reinforcement laid is first concreted only at half the height subject to compressive stress. To connect the reinforcement with the concrete, the ends of the beam and some IO gaps to the length of the beam are concreted over the entire height (Fig. 1). After a known period of time, when the concrete acquires the necessary strength, the concrete beam is thoroughly applied to the load, sufficient to force in the iron the stresses close to the yield strength. In the loaded: the rest of the beam is concreted already at} this height. The unloading of the beam is also carried out on the acquisition of concrete {of the strength to be assembled.
В приготовленной указанным способом и разгруженной балке напр жени в сжатой зоне работающей конструкции будут раст гивающими. В зоне расположени арматуры, вследствие напр жений в железе, вызванных предварительным нагружением, будут сжимающие напр жени .In the prepared and unloaded beam, the stress in the compressed area of the working structure will be tensile. In the area of the valve, due to the stress in the iron caused by the preload, there will be compressive stresses.
В работающей конструкции напр жени не достигают критических. Поэтому балка, приготовленна таким образом , заведомо ,не будет иметь статических и даже усадочных волос ных трещин.In a working design, the stresses do not reach critical. Therefore, a beam prepared in this way, obviously, will not have static or even shrinking hair cracks.
Возможное видоизменение предлагаемого способа изготовлени железобетонных балок заключаетс в том, что в забетонированной сжатой зоне Оставл етс поперечный разрез (фиг. 5). По достижении бетоном сжатой зоны достаточной механической прочности (через 7 - 9 дней) балки укладываютс в зажимы раст гивающей машины (фиг. 6) и раст гиваютс до получени в железе напр жений, близких к пределу текучести или временному сопротивлению. Сжатый бетон, в виду наличи разреза, заметного раст жени испытывать не будет. В состо нии предварительного напр жени зона раст жени балки бетонируетс и в таком положении балка выдерживаетс снова 7-9 дней дл приДани прочности бетону; после этого она может идти в дело.A possible modification of the proposed method of manufacturing reinforced concrete beams is that a cross section is left in the concreted compressed zone (Fig. 5). When the concrete achieves a compressed zone of sufficient mechanical strength (after 7–9 days), the beams are placed in the clamps of the stretching machine (Fig. 6) and are stretched to produce stresses in iron close to the yield strength or temporary resistance. Compressed concrete, due to the presence of the cut, will not experience noticeable stretching. In the prestressing state, the stretching zone of the beam is concreted and in such a position the beam is maintained again for 7-9 days to give strength to the concrete; after that she can go into business.
Предмет изобретени .The subject matter of the invention.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU182747A SU49135A1 (en) | 1935-12-20 | 1935-12-20 | The method of manufacturing reinforced concrete beams and the message to the reinforcement of its preliminary stresses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU182747A SU49135A1 (en) | 1935-12-20 | 1935-12-20 | The method of manufacturing reinforced concrete beams and the message to the reinforcement of its preliminary stresses |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU187725 Division |
Publications (1)
Publication Number | Publication Date |
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SU49135A1 true SU49135A1 (en) | 1936-08-31 |
Family
ID=48362014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU182747A SU49135A1 (en) | 1935-12-20 | 1935-12-20 | The method of manufacturing reinforced concrete beams and the message to the reinforcement of its preliminary stresses |
Country Status (1)
Country | Link |
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SU (1) | SU49135A1 (en) |
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1935
- 1935-12-20 SU SU182747A patent/SU49135A1/en active
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