Novel composite rod with built-in hollow bamboo pipe

Abstract

The invention discloses a novel composite rod with a built-in hollow bamboo pipe, and relates to a combined rod. Further application of natural bamboos in a building structure is prevented due to theproblems that the natural bamboos are naturally uneven and are easy to crack in a circumferential direction and difficult to standardize, and the like. The novel composite rod comprises a GFRP (GlassFiber Reinforced Polymer) pipe, a bamboo pipe arranged in the GFRP pipe and a concrete layer which is filled between the GFRP pipe and the bamboo pipe, wherein the bamboo pipe is the natural hollow bamboo pipe; one or multiple bamboo pipes are arranged in the GFRP pipe; the bamboo pipe is in equal height with the GFRP pipe or is shorter than the GFRP pipe. The bamboo pipe is used as an inner pipeof hollow sandwich GFRP pipe concrete and is coated in concrete, and the problems that the bamboo pipe is naturally uneven and is easy to crack in the circumferential direction can be avoided, so thatthe natural bamboo pipe can be reasonably utilized, and the cost can be effectively reduced on the premise that enough strength of the combined rod is ensured; the concrete is filled between the bamboo pipe and the outer GFRP pipe, stressed cracking of the bamboo pipe can be avoided, and inward local unstability of the GFRP pipe is avoided.

Description

technical field

[0001] The invention relates to a rod, in particular to a novel composite rod with a hollow bamboo tube inside. Background technique

[0002] GFRP pipe has the advantage of no corrosion on the outside, and when applied to GFRP pipe concrete, it can effectively restrain the internal concrete. The GFRP pipe concrete with hollow interlayer has the advantages of reducing its own weight and reducing concrete materials. However, the internal GFRP pipe of the hollow interlayer does not bear the main load, and its main function is to restrain the inward deformation of the concrete. The cost of using GFRP pipes inside is high, and the bonding force is not ideal. my country is rich in bamboo resources, but its utilization has always been a research hotspot. How to use natural bamboo in building structures has always been a key issue in its utilization. Its further application in building structural components. Contents of the invention

[0003] The technical problem...

Examples

Embodiment 1

[0022] Such as figure 1 Shown, the present invention comprises GFRP pipe 1, be located at the bamboo pipe 2 in GFRP pipe 1 and fill in the concrete 3 layers between GFRP pipe 1, bamboo pipe 2; Described bamboo pipe 2 is natural hollow bamboo pipe 2 , The GFRP tube 1 is provided with one or more bamboo tubes 2 , the bamboo tubes 2 are equal to the GFRP tube 1 or shorter than the GFRP tube 1 . Using the bamboo tube 2 as the inner tube of the hollow interlayer GFRP pipe 1 concrete 3, which is wrapped in the concrete 3, can avoid the natural unevenness of the bamboo tube 2 and the problem of easy cracking in the ring direction, so that the natural bamboo tube 2 can be used reasonably. On the premise of ensuring sufficient strength of the combined rod, the cost can be effectively reduced. Concrete 3 is filled between the bamboo tube 2 and the outer GFRP tube 1 to avoid cracking of the bamboo tube 2 and local instability of the GFRP tube 1 inward. The outward protrusion of the bam...

Embodiment 2

[0030] Such as figure 2 As shown, the same as the first embodiment will not be repeated, the difference is: the GFRP tube 1 is provided with three or more than three bamboo tubes 2 . According to actual needs, the corresponding number of bamboo tubes 2 can be selected to effectively reduce the weight of the combined rod.

[0031] In order to improve the integrity, gaps are placed between the bamboo tubes 2 to fill the concrete 3 between the bamboo tubes 2 . On the premise of effectively improving the integrity, increase the strength.

[0032] The following is an analysis of the hollow bamboo tube 2 and the hollow GFRP tube 1 in the combined rod: through the finite element calculation and comparison of the hollow inner bamboo tube 2 and the hollow inner GFRP tube 1 of the same size, the failure modes of the two are the same, as image 3 As shown, the load-displacement curves of the hollow inner bamboo tube 2 and the hollow inner GFRP tube 1 are compared, and the bearing capa...

technical field

[0001] The invention relates to a rod, in particular to a novel composite rod with a hollow bamboo tube inside. Background technique

[0002] GFRP pipe has the advantage of no corrosion on the outside, and when applied to GFRP pipe concrete, it can effectively restrain the internal concrete. The GFRP pipe concrete with hollow interlayer has the advantages of reducing its own weight and reducing concrete materials. However, the internal GFRP pipe of the hollow interlayer does not bear the main load, and its main function is to restrain the inward deformation of the concrete. The cost of using GFRP pipes inside is high, and the bonding force is not ideal. my country is rich in bamboo resources, but its utilization has always been a research hotspot. How to use natural bamboo in building structures has always been a key issue in its utilization. Its further application in building structural components. Contents of the invention

[0003] The technical problem...

Examples

Embodiment 1

[0022] Such as figure 1 Shown, the present invention comprises GFRP pipe 1, be located at the bamboo pipe 2 in GFRP pipe 1 and fill in the concrete 3 layers between GFRP pipe 1, bamboo pipe 2; Described bamboo pipe 2 is natural hollow bamboo pipe 2 , The GFRP tube 1 is provided with one or more bamboo tubes 2 , the bamboo tubes 2 are equal to the GFRP tube 1 or shorter than the GFRP tube 1 . Using the bamboo tube 2 as the inner tube of the hollow interlayer GFRP pipe 1 concrete 3, which is wrapped in the concrete 3, can avoid the natural unevenness of the bamboo tube 2 and the problem of easy cracking in the ring direction, so that the natural bamboo tube 2 can be used reasonably. On the premise of ensuring sufficient strength of the combined rod, the cost can be effectively reduced. Concrete 3 is filled between the bamboo tube 2 and the outer GFRP tube 1 to avoid cracking of the bamboo tube 2 and local instability of the GFRP tube 1 inward. The outward protrusion of the bam...

Embodiment 2

[0030] Such as figure 2 As shown, the same as the first embodiment will not be repeated, the difference is: the GFRP tube 1 is provided with three or more than three bamboo tubes 2 . According to actual needs, the corresponding number of bamboo tubes 2 can be selected to effectively reduce the weight of the combined rod.

[0031] In order to improve the integrity, gaps are placed between the bamboo tubes 2 to fill the concrete 3 between the bamboo tubes 2 . On the premise of effectively improving the integrity, increase the strength.

[0032] The following is an analysis of the hollow bamboo tube 2 and the hollow GFRP tube 1 in the combined rod: through the finite element calculation and comparison of the hollow inner bamboo tube 2 and the hollow inner GFRP tube 1 of the same size, the failure modes of the two are the same, as image 3 As shown, the load-displacement curves of the hollow inner bamboo tube 2 and the hollow inner GFRP tube 1 are compared, and the bearing capa...

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