CN111877560B - A steel-wood hybrid cross-string arch structure - Google Patents

Abstract

The present invention discloses a steel-wood hybrid cross-chord arch structure, including an upper chord single-layer wood arch shell and a lower chord cable assembly; the upper chord single-layer wood arch shell is generated by the intersection of two groups of parallel obliquely crossed wood arches, and the two ends of the wood arches are respectively connected to the frame beam; the lower chord cable assembly includes a plurality of lower chord cables and struts arranged below the upper chord single-layer wood arch shell, the two ends of the lower chord cables are respectively connected to the frame beam, and are staggered with the cross arches of the upper chord single-layer wood arch shell, the struts are arranged between the lower chord cables and their corresponding wood arches and are arranged at intervals along the lower chord cables, and the lower chord cables, struts and corresponding wood arches cooperate to form a spatial three-dimensional truss structure. The present invention can effectively reduce the horizontal thrust at the arch shell support, thereby achieving the purpose of reducing the size of the lower supporting member, and at the same time, the arrangement of the cables can reduce the stress level of the arch, so that the force of the upper chord arch is more uniform, and the overall stability of the structure is better.

Description

A steel-wood hybrid cross-string arch structure

Technical Field

The invention belongs to the technical field of building structure engineering, and particularly relates to a novel large-span steel-wood hybrid cross-string arch structure.

Background Art

Steel-wood hybrid beam string/arch means that the upper chord is made of wood beam/arch, the lower chord is made of tensioned steel cable, and the support pole can be a hybrid component of wood pole or steel pole. The roof structure system composed of multiple parallel steel-wood beam string/arch has been used in many swimming pools in China, such as Guizhou Rongjiang Swimming Pool and Changchun National Fitness Center Swimming Pool.

The existing steel-wood arch-string structures usually adopt a parallel array arrangement of multiple plane arch-string steel-wood arches. When the column spacing is large, the existing parallel array plane arch-string steel-wood arches need to arrange large-section support purlins to maintain their stability, which will cause material waste and mismatch in the scale of primary and secondary components. The existing steel-wood arch-string structures have many cross nodes on the upper arch, which is more complicated to construct. In addition, the lower chord cables are arranged in parallel with the upper arch, and the arrangement of the cables is relatively messy visually.

Summary of the invention

The purpose of the present invention is to provide a steel-wood hybrid cross-string arch structure with better overall structural stability in response to the above-mentioned problems.

The technical solution of the present invention is implemented as follows: a steel-wood hybrid cross-string arch structure, characterized in that it includes an upper chord single-layer wooden arch shell and a lower chord cable assembly;

The upper chord single-layer wooden arch shell is generated by the intersection of two sets of parallel obliquely crossed wooden arches, and both ends of the wooden arches are respectively connected to the frame beams;

The lower chord cable assembly includes a plurality of lower chord cables and struts arranged below the upper chord single-layer wooden arch shell. Both ends of the lower chord cables are respectively connected to the frame beams and are arranged alternately with the cross arches of the upper chord single-layer wooden arch shell. The struts are arranged between the lower chord cables and their corresponding wooden arches and are arranged at intervals along the lower chord cables. The lower chord cables, struts and corresponding wooden arches cooperate to form a spatial three-dimensional truss structure.

The steel-wood hybrid cross-tensioned arch structure described in the present invention has two sets of parallel, obliquely crossed and corresponding wooden arches in the upper chord single-layer wooden arch shell whose ends coincide with the connection points of the frame beam, and two ends of the lower chord cable are connected to the connection points where the corresponding two wooden arches coincide with the frame beam, that is, the end of the lower chord cable and the end of the corresponding two wooden arches are connected at the same position of the frame beam.

In the steel-wood hybrid cross-string arch structure described in the present invention, the end of the lower chord cable and the ends of the corresponding two wooden arches are connected to the frame beam through the same connecting support.

The steel-wood hybrid cross-string arch structure described in the present invention has a plurality of struts arranged between the lower chord cable and the wooden arch, and every two struts form a group. The lower ends of the two struts are connected to the same point of the lower chord cable, and the upper ends thereof are respectively connected to the corresponding two wooden arches to form a V-shaped supporting structure.

The steel-wood hybrid cross-string arch structure described in the present invention comprises a plurality of struts arranged between the lower chord cables and the wooden arches corresponding to the two ends of the upper chord single-layer wooden arch shell, wherein the upper ends of the struts close to the upper chord single-layer wooden arch shell are connected to the corresponding wooden arches, and the upper ends of the struts close to the frame beam are connected to the frame beams.

In the steel-wood hybrid cross-string arch structure described in the present invention, a plurality of groups of V-shaped support structures are arranged parallel to and at equal intervals along the arrangement direction of the lower chord cables between each lower chord cable and the corresponding wooden arch.

The steel-wood hybrid cross-string arch structure of the present invention has a V-shaped support structure formed by a group of struts connected to the cross position formed in the middle of the upper chord single-layer wooden arch shell.

The steel-wood hybrid cross-string arch structure of the present invention has a plurality of horizontal reinforcing rods arranged in the upper chord single-layer wooden arch shell, and the horizontal reinforcing rods are connected between corresponding two wooden arches or between the wooden arch and the frame beam.

In the steel-wood hybrid cross-arch structure of the present invention, the horizontal reinforcing rods and the lower chord cables are arranged perpendicular to each other, and a plurality of horizontal reinforcing rods corresponding to the upper side of the lower chord cables are arranged in parallel at equal intervals along the arrangement direction of the lower chord cables.

In the steel-wood hybrid cross-string arch structure described in the present invention, the V-shaped support structure formed by the horizontal reinforcing rod and the corresponding two support rods is on the same vertical plane.

The present invention is mainly suitable for gymnasiums with rectangular or elliptical plane layouts such as swimming pools and basketball halls. Compared with the traditional one-way parallel tensioned arch structure, the structural system can effectively reduce the horizontal thrust at the arch shell support through the cooperation of the upper chord single-layer wooden arch shell and the lower chord cable assembly, thereby achieving the purpose of reducing the size of the lower supporting member. At the same time, the setting of the cable can reduce the stress level of the arch, make the force of the upper chord arch more uniform, and the overall stability of the structure is better.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic plan view of the present invention.

Markings in the figure: 1 is the frame beam, 2 is the wooden arch, 3 is the lower chord cable, 4 is the support rod, and 5 is the horizontal reinforcement rod.

DETAILED DESCRIPTION

The present invention will be described in detail below in conjunction with the accompanying drawings.

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the invention.

As shown in FIGS. 1 and 2 , a steel-wood hybrid cross-tensioned arch structure includes an upper chord single-layer wooden arch shell and a lower chord cable assembly. The upper chord single-layer wooden arch shell can be a cylindrical surface or an ellipsoidal surface.

Among them, the upper chord single-layer wooden arch shell is generated by the intersection of two groups of parallel obliquely crossed wooden arches 2, and the two ends of the wooden arch 2 are respectively hinged to the frame beam 1. The lower chord cable assembly includes a plurality of lower chord cables 3 and struts 4 arranged below the upper chord single-layer wooden arch shell. The two ends of the lower chord cables 3 are respectively hinged to the frame beam 1 and are staggered with the crossed arches of the upper chord single-layer wooden arch shell. The cable setting can reduce the horizontal thrust at the arch shell support, thereby achieving the purpose of reducing the size of the lower supporting member. At the same time, the cable setting can reduce the stress level of the arch, so that the force on the upper chord arch is more uniform. The struts 4 are arranged between the lower chord cables 3 and the corresponding wooden arches 2 and are arranged at intervals along the lower chord cables 3. The struts of the traditional tensioned beam structure are single and vertically arranged, while the struts of this structural system are double, obliquely arranged, and connected to the upper chord arch components on both sides.

Specifically, the two ends of the two groups of parallel, oblique, crossed and corresponding wooden arches 2 in the upper chord single-layer wooden arch shell coincide with the connection points of the frame beam 1, and the two ends of the lower chord cable 3 are connected to the connection points that coincide with the corresponding two wooden arches 2 and the frame beam 1, that is, the ends of the lower chord cable 3 and the ends of the corresponding two wooden arches 2 are connected at the same position of the frame beam 1, and the ends of the lower chord cable 3 and the ends of the corresponding two wooden arches 2 are hinged to the frame beam 1 through the same connecting support 5, and the lower chord cable 3, the strut 4 and the corresponding wooden arch 2 cooperate to form a spatial three-dimensional truss structure.

In this embodiment, every two struts 4 among the several struts 4 arranged between the lower chord cable 3 and the wooden arch 2 constitute a group, the lower ends of the two struts 4 are hinged at the same place of the lower chord cable 3, and the upper ends thereof are respectively hinged to the corresponding two wooden arches 2 to form a V-shaped supporting structure, and among the several struts 4 arranged between the lower chord cables 3 and the wooden arches 2 corresponding to the two ends of the upper chord single-layer wooden arch shell, the upper ends of the struts 4 close to the upper chord single-layer wooden arch shell are hinged to the corresponding wooden arch 2, and the upper ends of the struts 4 close to the frame beam 1 are hinged to the frame beam 1; wherein, between each lower chord cable 3 and the corresponding wooden arch 2, there are several groups of V-shaped supporting structures arranged in parallel and at equal intervals along the arrangement direction of the lower chord cable 3, and the V-shaped supporting structures formed by a group of struts 4 are connected to the intersection formed in the middle of the upper chord single-layer wooden arch shell.

In order to strengthen the in-plane stiffness of the upper chord single-layer wooden arch shell, a plurality of horizontal reinforcing rods 5 are arranged in the upper chord single-layer wooden arch shell, and the horizontal reinforcing rods 5 are hinged between the corresponding two wooden arches 2 or between the wooden arch 2 and the frame beam 1. The horizontal reinforcing rods 5 and the lower chord cables 3 are arranged perpendicular to each other, and the corresponding plurality of horizontal reinforcing rods 5 above the lower chord cables 3 are arranged in parallel at equal intervals along the arrangement direction of the lower chord cables 3. The V-shaped supporting structure formed by the horizontal reinforcing rods 5 and the corresponding two struts 4 is on the same vertical plane. Through the cooperation of the two struts and the corresponding horizontal reinforcing rods, a stable and reliable supporting structure is formed between the cables and the corresponding wooden arches, so that the overall stability of the structure is better.

The system of the present invention has only one cross node formed due to the parallel and staggered arrangement of the upper chord wooden arches, forming a spatial arch shell, which improves the overall stability of the structure, can reduce the cross-sectional size of the purlins, and visually makes the scales of the primary and secondary components more matched. In addition, the lower chord tension cables are arranged in parallel, the force transmission is clear and simple, and the visual appearance is more concise.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. The utility model provides a steel wood mixes alternately Zhang Xiangong structure which characterized in that: comprising an upper chord single-layer wood arch shell a lower chord cable assembly;

the upper chord single-layer wood arch shell is formed by intersecting two groups of parallel obliquely crossed wood arches (2), and two ends of each wood arch (2) are respectively connected with the frame beam (1);

The lower chord stay cable assembly comprises a plurality of lower chord stay cables (3) and stay bars (4) which are arranged below the upper chord single-layer wood arch shell, wherein two ends of each lower chord stay cable (3) are respectively connected with the frame beam (1) and are staggered with the cross arch of the upper chord single-layer wood arch shell, the stay bars (4) are arranged between each lower chord stay cable (3) and the corresponding wood arch (2) and are arranged at intervals along the lower chord stay cable (3), and the lower chord stay cables (3), the stay bars (4) and the corresponding wood arch (2) are matched to form a space three-dimensional truss structure;

Two groups of wood arches (2) which are parallel and obliquely arranged and are mutually corresponding in the upper chord single-layer wood arch shell are overlapped with the connecting points of the frame beams (1), two ends of the lower chord stay rope (3) are connected at the connecting points overlapped with the corresponding two wood arches (2) and the frame beams (1), namely, the end parts of the lower chord stay rope (3) and the end parts of the corresponding two wood arches (2) are connected at the same position of the frame beams (1);

Every two stay bars (4) in a plurality of stay bars (4) arranged between the lower chord stay rope (3) and the wood arches (2) form a group, the lower ends of the two stay bars (4) are connected to the same position of the lower chord stay rope (3), and the upper ends of the two stay bars are respectively connected with the two corresponding wood arches (2) to form a V-shaped supporting structure;

Among a plurality of stay bars (4) arranged between a lower chord stay rope (3) and a wood arch (2) corresponding to two ends of the upper chord single-layer wood arch shell, the upper end of the stay bar (4) close to one side of the upper chord single-layer wood arch shell is connected with the corresponding wood arch (2), and the upper end of the stay bar (4) close to one side of a frame beam (1) is connected with the frame beam (1);

a plurality of groups of V-shaped supporting structures which are parallel to the arrangement direction of the lower chord cables (3) and are arranged at equal intervals are arranged between each lower chord cable (3) and the corresponding wood arch (2);

A plurality of horizontal reinforcing rods (5) are arranged in the upper chord single-layer wood arch shell, and the horizontal reinforcing rods (5) are connected between two corresponding wood arches (2) or between the wood arches (2) and the frame beam (1);

the horizontal reinforcing rods (5) and the lower string inhaul cables (3) are arranged vertically, and a plurality of horizontal reinforcing rods (5) corresponding to the upper parts of the lower string inhaul cables (3) are arranged in parallel at equal intervals along the arrangement direction of the lower string inhaul cables (3).

2. The steel-wood hybrid cross Zhang Xiangong structure of claim 1, wherein: the end parts of the lower chord stay ropes (3) and the end parts of the two corresponding wood arches (2) are connected with the frame beam (1) through the same connecting support.

3. The steel-wood hybrid cross Zhang Xiangong structure of claim 1, wherein: and the cross positions formed in the middle of the upper chord single-layer wood arch shell are connected with a V-shaped supporting structure formed by a group of supporting rods (4).

4. The steel-wood hybrid cross Zhang Xiangong structure of claim 1, wherein: the horizontal reinforcing rods (5) and the V-shaped supporting structures formed by the two corresponding supporting rods (4) are arranged on the same vertical plane.