CN114856067A - A kind of building roof truss support structure and construction method based on structural mechanics - Google Patents

Abstract

The invention relates to the technical field of building trusses, and discloses a building roof truss support structure based on structural mechanics, comprising a truss, a color steel plate and a connecting unit, one end of the truss is fixedly connected with a fixing seat, and the other end of the truss is fixed A fixed plate is connected, and the fixed plate is provided with a bending portion, the fixed plate is connected with the connecting unit, the upper end of the truss is connected with a plurality of cross bars, and the two ends of the plurality of cross bars are provided with connecting portions, And the cross bar is connected with a connecting mechanism through the connecting part. The building roof truss support structure and construction method based on structural mechanics can reduce the difficulty of transportation and hoisting through modular design, and the truss structure has high energy absorption. At the same time, the truss structure uses less materials and light weight, which does not affect the building. of the interior space.

Description

A kind of building roof truss support structure and construction method based on structural mechanics

technical field

The invention relates to the technical field of building trusses, in particular to a building roof truss support structure and a construction method based on structural mechanics.

Background technique

The truss structure is a latticed beam structure, and the truss structure is often used in public buildings such as large-span workshops, exhibition halls, gymnasiums and bridges. Since most of the roof structures are used in buildings, trusses are usually also called roof trusses. Each member of the truss is mainly subjected to one-way tension and compression. The internal bending moment and shear force distribution, due to the self-balancing of the horizontal tensile and compressive forces, the entire structure does not generate horizontal thrust on the support. In terms of shear resistance, by rationally arranging the web rods, the shear force can be gradually transmitted to the support. seat. In this way, whether it is bending or shearing, the truss structure can give full play to the strength of the material, so it is suitable for building roof structures of various spans. The most common suspension structures are integral triangular and arc structures.

At present, the traditional triangular truss structure is limited by the lower mysterious rod, which affects the space inside the building to a certain extent. In addition, although the truss structure of the arc structure does not affect the space inside the building, it uses a lot of materials and its own weight is also high. Moreover, the truss structure is of integral design, and the chords and webs are welded. Although the structure is strong, this not only increases the difficulty of transportation and hoisting, but also reduces the seismic resistance of the truss due to its rigid connection structure.

SUMMARY OF THE INVENTION

(1) Technical problems solved

In view of the deficiencies of the prior art, the present invention provides a building roof truss support structure and a construction method based on structural mechanics, which can reduce the difficulty of transportation and hoisting through modular design, and the truss structure has high energy absorption, and at the same time The truss structure uses less materials and light weight, and does not affect the interior space of the building. Although the structure does not affect the space inside the building, it uses a lot of materials and has a large self-weight. Both the chord and the web are welded. Although the structure has high strength, this not only increases the difficulty of transportation and hoisting, but also makes its rigid connection. The structure also reduces the problem of seismic resistance of the truss.

(2) Technical solutions

In order to achieve the above purpose, the present invention provides the following technical solutions: a building roof truss support structure based on structural mechanics, including a truss, a color steel plate and a connecting unit, one end of the truss is fixedly connected with a fixed seat, and the other end of the truss is connected. One end is fixedly connected with a fixed plate, and the fixed plate is provided with a bent portion, the fixed plate is connected with the connecting unit, the upper end of the truss is connected with a plurality of cross bars, and the two ends of the plurality of cross bars are connected with each other. part, and the cross bar is connected with a connecting mechanism through the connecting part;

The connecting mechanism is used to temporarily connect two adjacent cross bars during construction, and at the same time fix the connection of the two cross bars after installation;

A clamping block is fixedly connected to the rod wall of the transverse rod through the installation groove, and the transverse rod is connected to the side wall of the color steel plate through the clamping block.

Preferably, the connecting mechanism includes a U-shaped block, the upper ends of the two vertical parts of the U-shaped block are both provided with a right-angle notch, the U-shaped block is clamped with a pressure plate through the right-angle notch, and the side wall of the pressure plate is opened There are round holes, both ends of the pressing plate are provided with clamping parts, the upper ends of the two vertical parts of the U-shaped block are provided with two annular parts, and the U-shaped block is sleeved with two annular parts. A plug, the side walls of the two plugs are provided with a notch, and the notch is clamped with the clamping part, and a threaded column is fixedly connected to one side of the horizontal part of the U-shaped block, and the threaded column passes through the circular hole and is threaded connected with a nut;

The lower end of the pressing plate is symmetrically and fixedly connected with a plurality of triangular blocks, one side of the right-angle notch is provided with a plurality of first gaps, and the corners of the connecting portion are provided with a plurality of second gaps, the first gaps Together with the second notch, the triangular block is clamped together. The side walls of the U-shaped block are symmetrically and fixedly connected with two connecting pieces, and the side walls of the two connecting pieces are each provided with a plurality of mounting holes.

Preferably, the connecting unit includes a support frame, the side wall of the support frame is symmetrically and fixedly connected with two bent plates, and the bending angle of the bent plates is the same as the bending portion, and the bent plate and the fixed plate pass through a plurality of The first bolt is fixedly connected, the lower ends of the two curved plates are fixedly connected with a support rod, the two ends of the support rod are symmetrically fixedly connected with two top rods, and one end of the two top rods is connected to the curved board. fixed connection of the side wall;

Both ends of the support rod are obliquely and fixedly connected with support plates, and the support plates are connected with the truss, and the side walls of the truss are symmetrically and fixedly connected with two support plates, both of which are supported by second bolts. The rod wall is fixedly connected.

Preferably, a circular plate is fixedly connected to the rod wall of the cross bar, a rubber ring is fixedly connected to the upper end of the circular plate, a circular platform is arranged in the rubber ring, and one end of the circular platform is fixedly connected to the circular plate, so The other end of the circular table is provided with an arc-shaped surface, and the upper end of the circular table is provided with a first threaded hole, the first threaded hole is threadedly connected with a screw, and a pressure ring is sleeved on the screw. The opening at the lower end is provided with a groove matched with the round table, and the cross bar is connected with the color steel plate through screws and pressure rings.

Preferably, the lower end of the clamping block is provided with two protrusions, the clamping block is clamped with an arc-shaped block through the two protrusions, and one end of the arc-shaped block is provided with two positioning protrusions. The other end of the shaped block is provided with an inclined surface, the arc-shaped block is fixedly connected with the side wall of the truss, and the tie rod is fixed on the clamping block.

Preferably, the side wall of the clamping block is sleeved with a fixing bolt through a through hole, the side wall of the arc-shaped block is connected with the fixing bolt through the second threaded hole, and the fixing bolt cooperates with the arc-shaped block to fix the pull rod, and The pull rod is an X-shaped structure.

The present invention also provides a construction method of a building roof truss support structure based on structural mechanics, comprising the following steps:

Step 1. Assemble the roof truss structure at the construction site;

Step 2, connect the two adjacent roof truss structures with an installation connection mechanism, a tension rod and a reinforcement rod;

Step 3: Install the color steel plate and waterproof the seams;

Step 4. Install the ridge on top of the roof truss.

Preferably, the roof truss structure in the first step is composed of one connecting unit, two trusses, two color steel plates and a plurality of cross bars. The assembly of the rod is carried out on the ground.

Preferably, in the second step, the roof truss structure is assembled and hoisted to the top of the building column for fixed installation, the connecting mechanism is used to temporarily connect the adjacent cross bars, and the connecting mechanism is used again to fix the cross bars after installing the tie rods and reinforcing rods.

(3) Beneficial effects

Compared with the prior art, the present invention provides a building roof truss support structure based on structural mechanics, which has the following beneficial effects:

1. When the present invention is in use, by assembling the roof truss structure at the construction site, each roof truss structure is composed of a connecting unit, two trusses, two color steel plates and a plurality of cross bars, and the connecting units, trusses and The assembly of the crossbar is carried out on the ground, which is easy to hoist even if it is transported, and there is an adjustment gap between each component unit, which reduces the technical requirements during installation. A flange is pressed out of the assembly hole on the steel plate, which can cooperate with the rubber ring to achieve a good waterproof effect, and no additional waterproof treatment is required.

2. The connecting mechanism provided in the present invention, when in use, inserts the pin into the annular portion for temporary fixing of the cross bar, uses the pressure plate to snap into the right-angle notch, and uses the nut to cooperate with the threaded column to compress the pressure plate, the pressure plate. The upper triangular block makes the connection between the U-shaped block and the cross bar not easy to loosen, and at the same time, the clamping part is clamped in the gap to locate the pin and increase the compressive strength of the connection of the cross bar. Connected by tie rods, the force strength of the cross-bar connection is effectively reduced, and the gap between the U-shaped block and the cross-bar can effectively increase its buffering performance.

3. The connecting unit provided in the present invention can realize the clamping connection between the fixed plate and the bent plate by using the bent structure when the fixed plate uses the bent portion and the bent plate, and the bent plate of the connecting unit supports the truss from two directions. The transmitted extrusion force and down pressure are then fixed by the first bolt, which strengthens the connection strength between the fixed plate and the bent plate, and also realizes the flexible connection, so that the truss structure has a good energy absorption effect. In addition, The clamping block and the arc block can quickly install the cross bar, and the fixing bolts fix the clamping block and the tie rod at the same time, so as to realize the certain energy absorption between the truss, the color steel plate, the cross rod and the tie rod during the installation process. Increased seismic resistance of roof truss structures.

Description of drawings

Fig. 1 is a kind of structural mechanics schematic diagram of building roof truss support structure proposed by the present invention;

Fig. 2 is a bottom view of Fig. 1 of the building roof truss support structure based on structural mechanics proposed by the present invention;

3 is a schematic structural diagram of a cross bar in a building roof truss support structure based on structural mechanics proposed by the present invention;

4 is an effect diagram after construction of a building roof truss support structure based on structural mechanics proposed by the present invention;

5 is an enlarged view of the structure at A in FIG. 4 based on a structural mechanics-based building roof truss support structure proposed by the present invention;

6 is an enlarged view of the structure at B in FIG. 4 based on a structural mechanics-based building roof truss support structure proposed by the present invention;

7 is a schematic diagram of the structure of connecting units in a building roof truss support structure based on structural mechanics proposed by the present invention;

FIG. 8 is a schematic structural diagram of a connection mechanism in a building roof truss support structure based on structural mechanics proposed by the present invention;

FIG. 9 is a structural schematic diagram of a pressure plate and a triangular block in FIG. 8 based on a structural mechanics-based building roof truss support structure proposed by the present invention;

10 is a schematic structural diagram of a circular plate round table and a pressure ring in a structural mechanics-based building roof truss support structure proposed by the present invention;

Figure 11 is a cross-sectional view of a clamping block and an arc-shaped block in a building roof truss support structure based on structural mechanics proposed by the present invention;

FIG. 12 is a schematic structural diagram of a clamping block and an arc-shaped block in a building roof truss support structure based on structural mechanics proposed by the present invention.

In the picture: 1. Support frame; 2. Bending plate; 3. Truss; 4. Tie rod; 5. Cross bar; 6. Color steel plate; 7. Fixed plate; ; 11, support plate; 12, support plate; 13, nut; 14, triangular block; 15, snap part; 16, latch; 17, gap; 18, ring part; 19, right-angle gap; 20, first gap ;21, connecting piece; 22, second gap; 23, U-shaped block; 24, threaded column; 25, connecting part; 26, pressure plate; 27, screw; 28, pressure ring; 29, round table; 30, rubber ring; 31, circular plate; 32, arc block; 33, fixing bolt; 34, protrusion; 35, positioning protrusion.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

1-12, a kind of building roof truss support structure based on structural mechanics, including truss 3, color steel plate 6 and connecting units, one end of the truss 3 is fixedly connected with a fixed seat, the other end of the truss 3 is fixedly connected with a fixed plate 7, and the fixed plate 7 is provided with a bending part, the fixed plate 7 is connected with the connecting unit, the upper end of the truss 3 is connected with a plurality of cross bars 5, and the two ends of the plurality of cross bars 5 are provided with connecting parts 25, and the cross bars 5. A connecting mechanism is connected through the connecting portion 25, and the connecting mechanism is used to temporarily connect two adjacent horizontal bars 5 during construction, and at the same time fix the connection of the two horizontal bars 5 after installation.

A circular plate 31 is fixedly connected to the rod wall of the cross bar 5, and a rubber ring 30 is fixedly connected to the upper end of the circular plate 31. The rubber ring 30 is provided with a circular platform 29, one end of the circular platform 29 is fixedly connected with the circular plate 31, and the other end of the circular platform 29 is fixedly connected One end is provided with an arc-shaped surface, the upper end of the circular platform 29 is provided with a first threaded hole, the first threaded hole is threadedly connected with a screw 27, a pressure ring 28 is sleeved on the screw 27, and the opening of the lower end of the pressure ring 28 is provided with a circular platform. 29 is matched with the groove, the cross bar 5 is connected with the color steel plate 6 through the screw 27 and the pressure ring fitting 28.

When the present invention is in use, two trusses 3 are symmetrically fixed on both sides of the connecting unit, and the cross bar 5 is fixed at the corresponding position of the truss 3. After assembly, hoisting is performed. (not shown), then, temporarily connect the two adjacent cross bars 5 with the connecting mechanism, then install the fixed pull rod 4 and the reinforcing rod at the corresponding position (as shown in Figure 4), and finally use the connecting mechanism to connect the two horizontal bars. The connection of the rod 5 is fixed, and finally the color steel plate 6 is laid and installed. The color steel plate 6 is punched out in advance according to the designed size of the assembly hole. When fixing, first put the pressure ring 28 on the screw 27, and then screw the screw 27. In the first threaded hole, when the screw 27 presses the pressure ring 28, the arc surface of the upper end of the round table 29 cooperates with the groove at the lower end of the pressure ring 28 to press the color steel plate 6. At this time, the assembly hole on the color steel plate 6 is pressed to It is deformed to form a flange, which can cooperate with the rubber ring 30 to achieve a good waterproof effect, and it is not necessary to perform additional waterproof treatment on the fixing point.

Embodiment 2: What is different based on Embodiment 1 is;

8-9, the connection mechanism includes a U-shaped block 23, the upper ends of the two vertical parts of the U-shaped block 23 are provided with a right-angled gap 19, and the U-shaped block 23 is clamped with a pressing plate 26 through the right-angled gap 19, and the pressing plate The side wall of 26 is provided with circular holes, both ends of the pressing plate 26 are provided with clamping parts 15, the upper ends of the two vertical parts of the U-shaped block 23 are provided with two annular parts 18, and the U-shaped block 23 passes through the annular part 18. Two plug pins 16 are sleeved, and the side walls of the two plug pins 16 are both provided with a gap 17, and the gap 17 is connected with the clamping part 15. The horizontal part of the U-shaped block 23 is fixedly connected with a threaded column 24. The threaded column 24 passes through the round hole and is threadedly connected with a nut 13;

The lower end of the pressing plate 26 is symmetrically and fixedly connected with a plurality of triangular blocks 14, one side of the right-angled gap 19 is provided with a plurality of first gaps 20, and a corner of the connecting portion 25 is provided with a plurality of second gaps 22, the first gap 20 and The second notch 22 is clamped together with the triangular block 14 , the side walls of the U-shaped block 23 are symmetrically and fixedly connected with two connecting pieces 21 , and the side walls of the two connecting pieces 21 are each provided with a plurality of mounting holes.

In the connecting mechanism provided in the present invention, when in use, the U-shaped block 23 is first buckled on the connecting portion 25 of the two adjacent horizontal bars 5 from bottom to top, and the latch 16 is inserted into the annular portion 18, and then the horizontal The rod 5 is temporarily fixed, and then the tie rod 4 and the reinforcing rod are connected (as shown in Figure 3-5), and finally the pressure plate 26 is snapped into the right-angle notch 19, and the nut 13 and the threaded post 24 are used to press the pressure plate 26. , the triangular block 14 on the pressing plate 26 is snapped into the second gap 22 to squeeze the connecting portion 25 on the cross bar 5, and the triangular block 14 is simultaneously snapped into the first gap 20, so that the gap between the U-shaped block 23 and the horizontal bar 5 is The connection is stable and not easy to loosen. At the same time, the clamping part 15 on the pressure plate 26 is engaged in the notch 17 on the plug 16, and the plug 16 is positioned so that the U-shaped block 23 cooperates with the plug 16 and the pressure plate 26 to increase the cross bar 5. The compressive strength of the connection, at the same time, the U-shaped blocks 23 are connected to the tie rod 4 through the connecting piece 21, which effectively reduces the force strength of the connection of the cross-bar 5. In addition, the gap between the U-shaped block 23 and the cross-bar 5 Can effectively increase its buffer performance.

Embodiment 3: There are differences based on Embodiment 1;

7, the connection unit includes a support frame 1, the side wall of the support frame 1 is symmetrically and fixedly connected with two bent plates 2, and the bending angle of the bent plate 2 is the same as the bending portion, and the bent plate 2 and the fixed plate 7 pass through A plurality of first bolts are fixedly connected, the lower ends of the two bent plates 2 are jointly fixedly connected with a support rod 9, and both ends of the support rod 9 are symmetrically and fixedly connected with two ejector rods 10, and one end of the two ejector rods 10 is connected to the bend. The side walls of the plate 2 are fixedly connected, the two ends of the support rod 9 are fixedly connected with supporting plates 12, and the supporting plates 12 are connected with the truss 3, and the side walls of the truss 3 are symmetrically and fixedly connected with two supporting plates 11, two supporting plates 11. The plates 11 are all fixedly connected to the rod wall of the support rod 9 through the second bolt;

A clamping block 8 is fixedly connected to the rod wall of the transverse rod 5 through the installation groove, and the transverse rod 5 is connected with the side wall of the color steel plate 6 through the clamping block 8. The lower end of the clamping block 8 is provided with two protrusions 34, and the clamping block 8 passes through. The two protrusions 34 are clamped with an arc-shaped block 32, one end of the arc-shaped block 32 is provided with two positioning protrusions 35, the other end of the arc-shaped block 32 is provided with an inclined surface, and the arc-shaped block 32 and the side wall of the truss 3 Fixed connection, the pull rod 4 is fixed on the clamping block 8, the side wall of the clamping block 8 is sleeved with the fixing bolt 33 through the through hole, the side wall of the arc block 32 is connected with the fixing bolt 33 through the second threaded hole, and the fixing bolt 33 is connected with the fixing bolt 33. The arc-shaped block 32 cooperates with and fixes the pull rod 4, and the pull rod 4 has an X-shaped structure.

In the connecting unit provided in the present invention, when the fixing plate 7 uses the bending portion and the bending plate 2, the bending structure can be used to realize the clamping connection between the fixing plate and the bending plate 2, and the bending plate 2 of the connecting unit is connected from the two The direction is subjected to the extrusion force and down pressure transmitted by the truss 3, and then it is fixed by the first bolt, which strengthens the connection strength between the fixed plate 7 and the bent plate 2, and also realizes the flexible connection, so that the truss structure has a good quality. In addition, when the cross bar 5 is fixed, the clamping block 8 on the cross bar 5 is directly clamped with the arc block 32 on the truss 3. After the clamping, the cross bar 5 and the clamping block 8 are pre-connected. After fixing the tie rod 4 with the fixing bolt 33, the fixing bolt 33 passes through the tie rod 4, the clamping block 8 and is connected with the second threaded hole on the arc block 32, and then the truss 3 does not need to be drilled after connection, and the arc block 32 can be To increase the structural strength of the stress point of the truss 3, it is also possible to use the fixing bolts 33 to fix the block 8 and the tie rod 4 at the same time, so as to realize the installation process. The energy-absorbing property increases the seismic resistance of the roof truss structure.

The present invention also provides a construction method of a building roof truss support structure based on structural mechanics, comprising the following steps:

Step 1. Assemble the roof truss structure at the construction site. Each roof truss structure is composed of a connecting unit, two trusses 3, two color steel plates 6 and a plurality of cross bars 5. The cross bars 5 installed on the truss 3 are based on the roof. The span is set, and the assembly of the connecting unit, the truss 3 and the cross bar 5 is carried out on the ground. The roof truss structure adopts modular production, which is easy to hoist even for transportation, and there is an adjustment gap between each component unit, which reduces the installation. time technical requirements;

Step 2. Connect the two adjacent roof truss structures with an installation connection mechanism, a tie rod 4 and a reinforcement rod. After the roof truss structure is assembled, it is hoisted to the top of the building column for fixed installation, and the connection mechanism is used to temporarily connect the adjacent horizontal beams. Rod 5, after installing the tie rod 4 and the reinforcing rod, use the connecting mechanism to fix the cross rod 5 again. The connecting mechanism ensures the connection strength between the two cross rods 5 with a large contact area, and directly connects the truss 3 with the tie rod 4, so that the The force received by the connection mechanism is dispersed to the truss 3, which can not only ensure the connection strength between the truss 3 and the cross bar 5, but also enable the two to have high energy absorption.

Step 3: Install the color steel plate 6, and waterproof the joints, using adhesive glue or laying waterproof membranes;

Step 4. Install the ridge on top of the roof truss.

It should be noted that the term "comprising" or any other variation thereof is intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also not expressly listed Other elements, or elements that are inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. The utility model provides a building roof truss bearing structure based on structural mechanics, includes truss (3), various steel sheet (6), pull rod (4) and linkage unit, its characterized in that:

one end of the truss (3) is fixedly connected with a fixed seat, the other end of the truss (3) is fixedly connected with a fixed plate (7), the fixed plate (7) is provided with a bent part, the fixed plate (7) is connected with a connecting unit, the upper end of the truss (3) is connected with a plurality of cross rods (5), two ends of each cross rod (5) are provided with connecting parts (25), and the cross rods (5) are connected with connecting mechanisms through the connecting parts (25);

the connecting mechanism is used for temporarily connecting two adjacent cross rods (5) during construction, and fixing the connecting position of the two cross rods (5) after installation;

the wall of the cross rod (5) is fixedly connected with a clamping block (8) through a mounting groove, and the cross rod (5) is connected with the side wall of the color steel plate (6) through the clamping block (8).

2. A structural mechanics based building roof truss support structure as defined in claim 1 wherein: the connecting mechanism comprises a U-shaped block (23), right-angle notches (19) are formed in the upper ends of two vertical portions of the U-shaped block (23), a pressing plate (26) is clamped on the U-shaped block (23) through the right-angle notches (19), a round hole is formed in the side wall of the pressing plate (26), clamping portions (15) are arranged at two ends of the pressing plate (26), two annular portions (18) are arranged at the upper ends of the two vertical portions of the U-shaped block (23), two bolts (16) are sleeved on the U-shaped block (23) through the annular portions (18), notches (17) are formed in the side walls of the two bolts (16), the notches (17) are clamped with the clamping portions (15), a threaded column (24) is fixedly connected to one side of the horizontal portion of the U-shaped block (23), and a nut (13) is in threaded connection after the threaded column (24) penetrates through the round hole;

the lower extreme symmetry fixedly connected with of clamp plate (26) is a plurality of three hornblocks (14), a plurality of first openings (20) have been seted up to one side of right angle breach (19), a plurality of second openings (22) have been seted up to the edge of connecting portion (25), first opening (20) and second opening (22) joint with three hornblocks (14) jointly, two connection pieces (21) of the lateral wall symmetry fixedly connected with of U-shaped piece (23), two a plurality of mounting holes have all been seted up to the lateral wall of connection piece (21).

3. A structural mechanics based building roof truss support structure as defined in claim 1 wherein: the connecting unit comprises a support frame (1), the side wall of the support frame (1) is symmetrically and fixedly connected with two bent plates (2), the bending angle of each bent plate (2) is the same as that of each bent part, the bent plates (2) are fixedly connected with a fixed plate (7) through a plurality of first bolts, the lower ends of the two bent plates (2) are fixedly connected with a supporting rod (9) together, two ejector rods (10) are symmetrically and fixedly connected to two ends of the supporting rod (9), and one end of each ejector rod (10) is fixedly connected with the side wall of the corresponding bent plate (2);

the both ends of bracing piece (9) all incline fixedly connected with layer board (12), and layer board (12) link to each other with truss (3), two backup pads (11), two of the lateral wall symmetry fixedly connected with of truss (3) backup pad (11) all are through the pole wall fixed connection of second bolt with bracing piece (9).

4. A structural mechanics based building roof truss support structure as defined in claim 1 wherein: fixedly connected with plectane (31) on the pole wall of horizontal pole (5), the upper end fixedly connected with rubber circle (30) of plectane (31), be equipped with round platform (29) in rubber circle (30), the one end and plectane (31) fixed connection of round platform (29), the other end of round platform (29) is equipped with the arcwall face, first screw hole has been seted up to the upper end of round platform (29), first screw hole female connection has screw (27), clamping ring (28) have been cup jointed on screw (27), the lower extreme opening part of clamping ring (28) has been seted up with round platform (29) matched with groove, horizontal pole (5) are joined in marriage (28) and are connected with various steel sheet (6) through screw (27) and clamping ring.

5. A structural mechanics based building roof truss support structure as defined in claim 1 wherein: the lower extreme of fixture block (8) is equipped with two arch (34), fixture block (8) have arc piece (32) through two protruding (34) joints, the one end of arc piece (32) is equipped with two location arch (35), the other end of arc piece (32) is equipped with the inclined plane, the lateral wall fixed connection of arc piece (32) and truss (3), pull rod (4) are fixed on fixture block (8).

6. A structural mechanics based building roof truss support structure as defined in claim 5 wherein: the lateral wall of fixture block (8) has cup jointed fixing bolt (33) through the through-hole, the lateral wall of arc piece (32) is connected with fixing bolt (33) through the second screw hole, fixing bolt (33) and arc piece (32) cooperation fixed pull rod (4), and pull rod (4) are X-shaped structure.

7. A construction method of the structural mechanics based building roof truss support structure of claim 1, wherein: the method comprises the following steps:

firstly, assembling a roof truss structure on a construction site;

secondly, connecting two adjacent roof truss structures by using a mounting connecting mechanism, a pull rod (4) and a reinforcing rod;

step three, installing a color steel plate (6), and performing waterproof treatment on the seam;

and step four, mounting a roof ridge at the top of the roof truss.

8. The method of claim 7, wherein the structural-mechanics-based construction of the structural-roof truss support structure comprises: the roof truss structure in the first step is composed of a connecting unit, two trusses (3), two color steel plates (6) and a plurality of cross rods (5), the cross rods (5) installed on the trusses (3) are arranged according to the span of the roof, and the assembling operation of the connecting unit, the trusses (3) and the cross rods (5) is carried out on the ground.

9. The method of claim 7, wherein the structural-mechanics-based construction of the structural-roof truss support structure comprises: and in the second step, the roof truss structure is assembled and then hoisted to the top of the building upright post for fixed installation, the connecting mechanism is used for temporarily connecting the adjacent cross rods (5), and the connecting mechanism is used for fixing the cross rods (5) after the pull rods (4) and the reinforcing rods are installed.

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