CN217027753U

CN217027753U - Novel truss structure

Info

Publication number: CN217027753U
Application number: CN202220542642.4U
Authority: CN
Inventors: 赵卫; 和超; 其他发明人请求不公开姓名
Original assignee: Yijianwang Technology Co ltd
Current assignee: Hebei Sanhai Green Building Technology Co ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-07-22
Anticipated expiration: 2032-03-14

Abstract

The utility model provides a novel truss structure, which comprises: the concrete component comprises an ultrahigh-performance concrete upper chord, wave-shaped web member reinforcing steel bars and lower chord reinforcing steel bars, wherein the ultrahigh-performance concrete upper chord is fixedly connected with the wave-shaped web member reinforcing steel bars, one part of each 2 wave-shaped web member reinforcing steel bars is embedded in the ultrahigh-performance concrete upper chord respectively, and the 2 wave-shaped web member reinforcing steel bars are welded and connected with the lower chord reinforcing steel bars. The utility model has simple processing and convenient installation. Temporary support is not needed during construction, and a formwork is not needed on site. The equipment pipelines are pre-installed in the truss, so that the construction speed is high, and the construction period is shortened. According to different stress characteristics, a more appropriate material component proportion is adopted, and the material cost is further reduced.

Description

Novel truss structure

Technical Field

The utility model relates to the field of fabricated buildings, in particular to a novel truss structure.

Background

Laminated floor slabs are the most common structural members of prefabricated buildings at present. In order to increase the overall rigidity of the composite floor slab, the composite floor slab needs to be additionally provided with a plurality of truss reinforcing steel bars between the laminated layer and the cast-in-situ layer. The truss steel bars can also provide good shear resistance between the laminated layer and the cast-in-place layer, and provide hoisting convenience during production and construction.

The traditional truss reinforcing steel bar utilizes the characteristics of triangular stability and the excellent overall performance of a space truss, the mechanical property of the traditional truss reinforcing steel bar is far greater than that of other reinforcing steel bar combinations or common section steels, but compared with a cast-in-place floor slab, the steel content of the truss reinforcing steel bar is also greatly increased, and then the cost of the floor slab is increased.

The lower prefabricated plate material of the composite slab is made of the ultra-high performance concrete, so that the thickness of the prefabricated plate can be effectively reduced, and meanwhile, due to the reduction of the thickness, the conventional truss steel bar cannot provide enough rigidity and bending resistance in the hoisting and construction processes. The utility model relates to a strengthen steel pipe rib structure CN 215484084U provides one kind and utilizes filling high strength concrete in the steel pipe to replace conventional truss last quarter reinforcing bar, satisfies the bending resistance requirement of hoist and mount and work progress through the steel pipe, but the steel pipe has improved material cost to inside fills high strength concrete production method efficiency extremely low and the inside hole appears easily.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, one of the purposes of the utility model is to utilize the characteristics of UHPC such as compression resistance, folding resistance and tensile strength to greatly improve, and further improve the integral rigidity of the laminated slab;

the utility model has the second purpose that UHPC is adopted to replace upper chord steel bars, thereby effectively reducing the steel content;

the utility model aims to solve the lifting safety problem caused by the infirm welding of the conventional truss steel bar;

the fourth purpose of the utility model is to adopt the material component proportion with lower cost according to the stress characteristic of the novel truss structure.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the novel truss structure comprises: the concrete comprises an ultrahigh-performance concrete upper chord, wave-shaped web member reinforcing steel bars and lower chord reinforcing steel bars, wherein the ultrahigh-performance concrete upper chord is fixedly connected with the wave-shaped web member reinforcing steel bars, one part of 2 wave-shaped web member reinforcing steel bars is respectively embedded in the ultrahigh-performance concrete upper chord, and the 2 wave-shaped web member reinforcing steel bars are welded and connected with the lower chord reinforcing steel bars;

furthermore, the section of the ultra-high performance concrete upper chord is circular, and the diameter of the ultra-high performance concrete upper chord is 30-200 mm;

further, the section of the upper chord of the ultra-high performance concrete is semicircular, and the diameter of the upper chord is 30-200 mm;

further, the section of the upper chord of the ultra-high performance concrete is rectangular, the height of the rectangle is 20mm-50mm, and the width of the rectangle is 30mm-100 mm;

further, the section of the ultra-high performance concrete upper chord member is trapezoidal;

furthermore, the section of the upper chord of the ultra-high performance concrete is in a step shape.

Furthermore, the inside upper chord steel bar that contains of ultra high performance concrete upper chord member, upper chord steel bar and 2 wave form web member steel bar welded connection. When the upper chord member has higher tensile requirement, the ultra-high performance concrete can not meet the requirement, and the upper chord steel bar can be additionally arranged;

optionally, prestressed upper chord steel bars are used.

The diameters of the corrugated web member reinforcing steel bars, the lower chord reinforcing steel bars and the upper chord reinforcing steel bars are 6-16 mm.

The lower chord steel bar of the novel truss structure is embedded in the ultra-high performance concrete precast slab to replace the conventional composite floor truss steel bar.

Furthermore, the novel truss structure can also be used in other components such as laminated wall boards and the like.

The ultrahigh-performance concrete upper chord member material is ultrahigh-performance self-compacting concrete and comprises cement, silica fume, quartz powder, fine sand, steel fiber and a water reducing agent, wherein the cement: silica fume: quartz powder: fine sand: the steel fiber comprises the following components in percentage by weight: 30-40: 8-10: 10-12: 35-50: 1-5, wherein the weight ratio of the water reducing agent to the water in the mixed solution is as follows: 5-10: 90-95.

The novel material is prepared by firing coal gangue and red mud in a calcining kiln at the temperature of 500-700 ℃ for 1-2 hours.

Novel UHPC truss production technology includes:

s1: processing truss reinforcing steel bars by using automatic truss production equipment;

s2: placing the truss steel bars in a mold;

s3: and filling UHPC concrete into the mould, and putting the mould into a warehouse after initial setting is achieved.

The novel truss structure provided by the utility model is simple to process and convenient to install. Temporary support is not needed during construction, and a formwork is not needed on site. The equipment pipelines are pre-installed in the truss, so that the construction speed is high, and the construction period is shortened. According to different stress characteristics, a more appropriate material component proportion is adopted, and the material cost is further reduced.

Drawings

FIG. 1 is a first schematic view of a novel truss structure;

FIG. 2 is a schematic diagram II of a novel truss structure;

FIG. 3 is a third schematic view of a novel truss structure;

FIG. 4 is a fourth schematic view of the novel truss structure;

FIG. 5 is a fifth schematic view of the novel truss structure;

fig. 6 is a sixth schematic view of the novel truss structure;

fig. 7 is a seventh schematic view of the novel truss structure;

fig. 8 is a schematic view eight of the structure of the novel truss;

in the figure, 1-ultra high performance concrete upper chord; 101-a circular ultra-high performance concrete upper chord; 102-a semicircular ultra-high performance concrete upper chord; 103-a rectangular ultra-high performance concrete upper chord; 104-a trapezoidal ultra-high performance concrete upper chord; 105-step-shaped ultrahigh-performance concrete upper chord; 2-corrugated web member steel bars; 3-lower chord steel bars; 4-upper chord steel bar.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

In a disclosed embodiment of the utility model, referring to fig. 1, a novel truss structure comprises an ultrahigh-performance concrete upper chord 1, wave-shaped web member steel bars 2 and lower chord steel bars 3, wherein the ultrahigh-performance concrete upper chord 1 is fixedly connected with the wave-shaped web member steel bars 2, one part of each of the 2 wave-shaped web member steel bars 2 is respectively embedded in the ultrahigh-performance concrete upper chord 1, and the 2 wave-shaped web member steel bars 2 are welded with the lower chord steel bars 3;

the section of the ultra-high performance concrete upper chord member 1 is circular;

referring to fig. 2 and 3, the section of the ultra-high performance concrete upper chord 1 is semicircular;

referring to fig. 4, the section of the ultra-high performance concrete upper chord 1 is rectangular;

referring to fig. 5, preferably, the section of the ultra-high performance concrete upper chord 1 is square;

referring to fig. 6, the section of the ultra-high performance concrete upper chord 1 is trapezoidal;

referring to fig. 7, the section of the ultra-high performance concrete upper chord member 1 is stepped.

In a disclosed embodiment of the present invention, referring to fig. 8, the inside of the ultra-high performance concrete upper chord member 1 includes an upper chord steel bar 4, and the upper chord steel bar 4 is welded to 2 corrugated web member steel bars 2.

The diameters of the corrugated web member reinforcing steel bars 2, the lower chord reinforcing steel bars 3 and the upper chord reinforcing steel bars 4 are 6-16 mm.

The lower chord steel bar 3 of the novel truss structure is embedded in the ultra-high performance concrete precast slab to replace the conventional composite floor truss steel bar.

The ultrahigh-performance concrete upper chord 1 is made of ultrahigh-performance self-compacting concrete and comprises cement, silica fume, quartz powder, fine sand, steel fiber and a water reducing agent, wherein the cement comprises the following components in parts by weight: silica fume: quartz powder: fine sand: the steel fiber comprises the following components in percentage by weight: 30-40: 8-10: 10-12: 35-50: 1-5, wherein the weight ratio of the water reducing agent to water in the mixed solution is as follows: 5-10: 90-95.

The ultra-high performance concrete has a very wide range of change of the proportion according to different material requirements, so that the proportion can be adjusted according to the compression resistance, the bending resistance and the tensile strength of a calculation result in the actual application process.

The novel material is used for replacing cement components in the ultrahigh-performance self-compacting concrete, the novel material is prepared by firing coal gangue and red mud in a calcining kiln, the firing temperature is 500-700 ℃, and the firing time is 1-2 hours.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

It will be understood by those skilled in the art that the foregoing embodiments are provided merely for clarity of explanation and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

1. Novel truss structure, include: super high performance concrete upper chord member (1), wave form web member reinforcing bar (2), last quarter reinforcing bar (3), its characterized in that: the ultrahigh-performance concrete upper chord member (1) is fixedly connected with the corrugated web member reinforcing steel bars (2), one part of each of 2 corrugated web member reinforcing steel bars (2) is embedded in the ultrahigh-performance concrete upper chord member (1), and the 2 corrugated web member reinforcing steel bars (2) are welded with the lower chord reinforcing steel bar (3);

the section of the ultra-high performance concrete upper chord (1) is circular;

the section of the ultra-high performance concrete upper chord member (1) is semicircular;

the section of the ultra-high performance concrete upper chord (1) is rectangular;

the section of the ultra-high performance concrete upper chord member (1) is trapezoidal;

the section of the ultra-high performance concrete upper chord member (1) is in a step shape.

2. The novel truss structure as claimed in claim 1, wherein the inside of the ultra-high performance concrete upper chord member (1) contains an upper chord steel bar (4), and the upper chord steel bar is welded with 2 wave-shaped web member steel bars (2).

3. The novel truss structure of claim 1 wherein the corrugated web reinforcement (2), the lower chord reinforcement (3) and the upper chord reinforcement (4) have a diameter of 6mm to 16 mm.

4. The new truss structure of claim 1 wherein the lower chord steel (3) of the new truss structure is embedded in the ultra high performance concrete precast slab instead of the composite floor truss steel.