CN202658723U

CN202658723U - Suspended prestressed cable steering cast steel joint

Info

Publication number: CN202658723U
Application number: CN 201220216027
Authority: CN
Inventors: 韩重庆; 黄桂新
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2012-05-15
Filing date: 2012-05-15
Publication date: 2013-01-09
Anticipated expiration: 2022-05-15

Abstract

The utility model discloses a suspended prestressed cable steering cast steel joint, which consists of a cast steel beam, a cast steel cable clamp and a pin shaft, wherein the cast steel beam is arranged and fixedly welded on a truss chord member; the upper end of the cast steel cable clamp and the lower end of the cast steel beam are provided with outward extending anchorage plates which are correspondingly matched with each other; pin holes are formed on the outward extending anchorage plates; the pin shaft penetrates through the cast steel beam and the pin holes of the cast steel cable clamp and connects the cast steel cable clamp with the cast steel beam; and the cast steel cable clamp can rotate by taking the pin shaft as a shaft. The joint realizes the steering of a continuous inhaul cable on the inner side of a truss joint, solves the problem that secondary internal force is generated in peripheral rod pieces in a tension process of the inhaul cable by virtue of the rotation of the pin shaft, and is particularly suitable for a stretching rope steering joint in a suspendome structure, a beam string structure, a cable-truss structure, a suspension bridge structure and the like.

Description

Hang prestressed cable and turn to cast steel node

Technical field

The utility model relates to a kind of building structure node, specifically, is a kind of drag-line steering node for prestressed steel structure.

Background technology

At present, all kinds of structures with prestressed cable are widely used in the various buildings.This class formation is owing to adopted the very high cable wire of tensile strength to replace the steel of other trade mark, so that member section reduces, dead load alleviates, thereby can build the very large structure of span.

In prestressed steel structure, the external prestressing drag-line is generally broken line type and arranges, at the turnover position steering node must be set, and steering node should guarantee the prestressed continuity of drag-line, avoid again drag-line to produce excessive loss of prestress and time internal force in the prestressed stretch-draw process, its performance plays a key effect to the performance of external prestressing drag-line effect.

Prestressed cable is realized in the main employing steering gear of turning to of main structure inside, arc contact surface between steering gear utilization and drag-line solves and turns to and local extruding problem, be fixed on the agent structure both sides by support welding, avoid the position of drag-line and main structure to clash.Steering gear mainly contains two problems: the one, and drag-line and steering gear Contact face are large and be sliding friction, and the loss of prestress that frictional force causes is larger, and the inferior internal force that prestressed stretch-draw produces is also larger; The 2nd, drag-line will be tried one's best near main structure, is difficult to have between adaptive stay cable and main structural member the situation of certain distance.

Along with deepening continuously that prestressed steel structure is studied, the linear layout of drag-line in steel work is also more various, and steering node is also constantly proposed higher requirement, and steering gear node commonly used more and more is difficult to solve the new problem in the engineering.

The utility model content

For addressing the above problem, the purpose of this utility model provides a kind of prestressed cable of hanging and turns to cast steel node, and it is reliable to have a power transmission; Distance between drag-line and main structural member and rise can be adjusted as required; The loss of prestress that in the prestressed stretch-draw process, produces and time less advantage of internal force.

The prestressed cable of hanging of the present utility model turns to cast steel node, is comprised of cast steel beam 2, cast steel cord clip 3, bearing pin 5; Described cast steel beam 2 is shelved and is weldingly fixed on the chord member of truss 1; Cast steel cord clip 3 upper ends, cast steel beam 2 lower ends are respectively equipped with the overhanging otic placode of corresponding matching, and overhanging otic placode is provided with pin-and-hole; Bearing pin 5 passes the pin-and-hole of cast steel beam 2, cast steel cord clip 3, and cast steel cord clip 3, cast steel beam 2 are connected, and cast steel cord clip 3 can rotate for axle by bearing pin 5.Arrange lubriation material on the cast steel cord clip.

Preferably, drag-line should can be avoided other structural element as basic principle to guarantee drag-line from downward the hanging apart from adjustable of cast steel beam, and adjusts according to the required prestressed size of structure, and it is more reasonable that cast steel cord clip 3 length are not more than 500mm.

Preferably, arrange frictional force and the cord clip off normal that lubriation material (such as polytetrafluoroethylene (PTFE) etc.) produces when reducing prestressed stretch-draw at drag-line and cast steel cord clip contact surface, reduce loss of prestress.

Preferably, bearing pin bears larger shearing, should adopt low-carbon alloy material (such as 40Cr).

Cable wire 4 passes the space that the overhanging otic placode that is positioned at cast steel beam 2, cast steel cord clip 3 surrounds, and this moment, cable wire 4 was hung on cast steel cord clip 3, and direction changes.

The utility model utilizes the rotation of bearing pin and hangs effect solution drag-line and turns to, and realizes drag-line locus capable of regulating, loss of prestress and the stretch-draw time very little effect of internal force.The cast steel beam directly is shelved on the chord member, and by the extruding force on chord member and the cast steel beam contact surface, weld seam only plays fixation, and is easy to connect, and power transmission is reliable; Drag-line and cast steel cord clip are hung below the cast steel beam by bearing pin, the cast steel cord clip is around the rotation of bearing pin, automatically knot modification two funiculus lateralis power are to substantially equal, and the angular bisector that the cord clip direction also can auto-alignment both sides drag-line simultaneously greatly reduces loss of prestress and stretch-draw time internal force; By the position of adjustment cast steel beam lower ear plate and the height of cord clip, can change the locus of drag-line, accommodation is very wide.

Based on above each point, the utility model power transmission route is clear and definite, and installation is methodically arranged, and is easy to operate, can effectively shorten the construction period, control the installation quality.

Description of drawings

Fig. 1 is the utility model node axonometric drawing.

Fig. 2 is the utility model node lateral view.

Fig. 3 is the utility model node top view.

Fig. 4 is the utility model node elevation.

Fig. 5 is A-A generalized section in the utility model node diagram 4.

Fig. 6 (a)～(c) hangs prestressing force to turn to cast steel node installation procedure figure.

Fig. 7 is the main couple schematic diagram, and figure centre circle out position is the utility model installation site.

Fig. 8 is B-B generalized section among main couple Fig. 7.

Among the figure: 1, chord member of truss, 2, the cast steel beam, 3, the cast steel cord clip, 4, drag-line, 5, bearing pin, 6,, hang prestressed cable and turn to cast steel node, 7, upper chord, 8, web member, 9, lower chord.

The specific embodiment

Embodiment of the present utility model is as follows below in conjunction with description of drawings:

Hang prestressed cable and turn to cast steel node, formed by cast steel beam 2, cast steel cord clip 3, bearing pin 5; As shown in Figure 1, cast steel beam 2 is shelved and is weldingly fixed on the chord member of truss 1; That cast steel beam 2 is is T-shaped, cast steel cord clip 3 is U-shaped, and in cast steel cord clip 3 lower ends, cast steel beam 2 upper ends are respectively equipped with the overhanging otic placode of corresponding matching, overhanging otic placode is provided with pin-and-hole; Bearing pin 5 passes the pin-and-hole of cast steel beam 2, cast steel cord clip 3, and cast steel cord clip 3, cast steel beam 2 are connected, and cast steel cord clip 3 can rotate for axle by bearing pin 5.Cable wire 4 passes the space that the overhanging otic placode that is positioned at cast steel beam 2, cast steel cord clip 3 surrounds, and cable wire 4 direction herein changes (as shown in Figure 5).

Realization measure of the present utility model and installation procedure (shown in Figure 6):

The utility model is mainly used in string and props up dome, opens the stretching rope steering node in the structures such as string beam, cable truss and suspension bridge, considers the needs that its function realizes, it realizes that accordingly measure and installation procedure have:

1) the cast steel beam is shelved on the chord member of truss of both sides, and with weld seam they is fixed, shown in Fig. 6 (a);

2) drag-line is passed the cast steel cord clip, the drag-line direction changes, shown in Fig. 6 (b);

3) the cast steel cord clip is connected by bearing pin with the cast steel beam, shown in Fig. 6 (c);

4) cast steel beam and chord member squish area should pass through calculative determination, should be not too small, in order to avoid chord member is subject to excessive eccentric extruding force;

5) before drag-line passes the cast steel cord clip, should arrange lubriation material at the cord clip inwall, the loss of prestress that causes to reduce the rubbing action of cable tension process.

Claims

1. hang prestressed cable and turn to cast steel node for one kind, it is characterized in that: formed by cast steel beam (2), cast steel cord clip (3), bearing pin (5); Described cast steel beam (2) is shelved and is weldingly fixed on the chord member of truss (1); Cast steel cord clip (3) upper end, cast steel beam (2) lower end are respectively equipped with the overhanging otic placode of corresponding matching, and overhanging otic placode is provided with pin-and-hole; Bearing pin (5) passes the pin-and-hole of cast steel beam (2), cast steel cord clip (3), and cast steel cord clip (3), cast steel beam (2) are connected, and cast steel cord clip (3) rotates take bearing pin (5) as axle.

2. the prestressed cable of hanging according to claim 1 turns to cast steel node, it is characterized in that: cast steel cord clip (3) length is not more than 500mm.