阅读说明：本技术 一种悬索桥加劲钢箱梁新型桁架式隔板及其操作方法 (Novel truss type partition plate for stiffening steel box girder of suspension bridge and operation method of novel truss type partition plate ) 是由 陈奉民 崔英明 郑升宝 李忠评 曾要争 应立 于 2020-07-10 设计创作，主要内容包括：本发明公开了一种悬索桥加劲钢箱梁新型桁架式隔板及其操作方法,属于桥梁设计技术领域,该产品由上横肋、下横肋、斜撑、节点板、加劲肋板及高强螺栓组成；上横肋、下横肋与加劲箱梁的顶、底、腹板环向焊接,在上横肋、下横肋翼缘若干节点设置节点板,相邻节点板之间通过斜撑相连,斜撑与节点板之间通过高强螺栓连接,节点板及上横肋、下横肋关键位置设置若干加劲肋板。本发明还提供了一种悬索桥加劲钢箱梁新型桁架式隔板的操作方法。本发明的技术方案材料利用率高,大大减轻了隔板重量,有显著的经济效益,所有钢构件和主梁节段一起在工厂内制作完成,钢构件均为小型构件,安装焊接方面,施工质量有可控,且斜撑与节点板采用栓接,后期维护更换方便。(The invention discloses a novel truss type partition plate of a suspension bridge stiffening steel box girder and an operation method thereof, belonging to the technical field of bridge design, wherein the product consists of an upper transverse rib, a lower transverse rib, an inclined strut, a gusset plate, a stiffening rib plate and a high-strength bolt; go up the top of horizontal rib, horizontal rib and stiffening box roof beam down, end, web hoop welding, at last horizontal rib, a plurality of nodes in horizontal rib edge of a wing set up the gusset plate down, link to each other through the bracing between the adjacent gusset plate, through high-strength bolt connection between bracing and the gusset plate, gusset plate and last horizontal rib, the key position of horizontal rib set up a plurality of stiffening rib boards down. The invention also provides an operation method of the novel truss type partition plate of the stiffening steel box girder of the suspension bridge. The technical scheme of the invention has high material utilization rate, greatly reduces the weight of the partition plate, has obvious economic benefit, completes the manufacture of all steel members and main beam segments in a factory, ensures that the steel members are small members, has controllable construction quality in the aspect of installation and welding, and is convenient to maintain and replace in the later period because the inclined struts and the gusset plates are bolted.)

1. The utility model provides a novel truss-like baffle of suspension bridge stiffening steel box girder which characterized in that: including last horizontal rib (1), horizontal rib (2), gusset plate (3), bracing (4), batten plate (5), stiffening rib (6) and high strength bolt (7), its characterized in that: go up horizontal rib (1), horizontal rib (2) and stiffening box roof beam's top down, the end, web hoop welding, go up horizontal rib (1), a plurality of nodes in horizontal rib (2) edge of a wing set up gusset plate (3) down, link to each other through bracing (4) between adjacent gusset plate (3), be connected through high strength bolt (7) between bracing (4) and gusset plate (3), gusset plate (3) and last horizontal rib (1), horizontal rib (2) key position sets up a plurality of stiffening rib ribs (6) down, set up in the middle of bracing (4) and one batten plate (5).

2. The novel truss-type partition plate for the stiffening steel box girder of the suspension bridge as claimed in claim 1, wherein: one end of the inclined strut (4) is fixedly connected with the upper node plate (3) in a bolting mode, and the other end of the inclined strut (4) is fixedly connected with the lower node plate (3) in a bolting mode.

3. The novel truss-type partition plate for the stiffening steel box girder of the suspension bridge as claimed in claim 2, wherein: and a gusset plate (3) is arranged at the corner point position where the stiffening box girder web plate is connected with the bottom plate.

4. The novel truss-type partition plate for the stiffening steel box girder of the suspension bridge as claimed in claim 3, wherein: the inclined strut (4) is a double-limb angle steel combined component, and the middle decoration piece adopts a decoration plate (5).

5. The novel truss-type partition plate for the stiffening steel box girder of the suspension bridge as claimed in claim 4, wherein: stiffening ribs (6) are arranged on the two sides of the gusset plate (3), the upper transverse rib (1) and the lower transverse rib (2).

6. The novel truss-type partition plate for the stiffening steel box girder of the suspension bridge as claimed in claim 5, wherein: and stiffening ribs (6) are arranged on two sides of the solid partition plate in the inhaul cable area at the end part of the stiffening box girder.

7. The novel truss-type partition plate for the stiffening steel box girder of the suspension bridge as recited in any one of claims 1 to 6, wherein: and stiffening ribs (6) are arranged on two sides of the flange corners of the upper transverse rib (1) and the lower transverse rib (2).

8. The operation method of the novel truss type partition plate of the suspension bridge stiffening steel box girder in the claim 1 is characterized in that: the method comprises the following steps:

step 1, blanking of each steel member of the truss partition plate is completed in a factory, and welding of a web plate and a flange plate of an upper transverse rib (1) and a lower transverse rib (2) of each subunit is completed;

step 2, welding the node plates (3) on flanges to form a whole, then welding stiffening ribs (6) at corresponding positions, and splicing the sub-units into a whole unit after the welding of the plate members of the sub-units is finished;

and 3, connecting the blanked inclined strut (4) with the upper and lower node plates through high-strength bolts, and forming a complete box girder segment with the top and bottom web plate units of the stiffening box girder after the whole partition plate is manufactured.

Technical Field

The invention belongs to the technical field of bridge design, and relates to a novel truss type partition plate for a stiffening steel box girder of a suspension bridge and an operation method of the novel truss type partition plate.

Background

The truss type partition plate is formed by extending a frame type partition plate of a domestic large-section box girder, the truss type partition plate enables the interior of a box to be quite permeable, the visual sense is good, the internal maintenance is convenient, the natural trend of the development of the large-section steel box girder is realized, redundant partition plate areas are removed, the upper part meets the requirement of wheel load, the lower part meets the requirement of section shape rigidity, the upper part and the lower part are supported by the middle part, the stress of the upper part is reduced, the whole-section bending mode is transversely converted into the tension and compression mode of the truss rod piece from the whole-section bending mode, the material performance is high, the weight of the partition plate is greatly reduced, remarkable economic benefits are achieved, and secondly, all steel members and main beam segments of the truss type partition plate are manufactured and finished together in a factory, the steel members are small members, the installation and welding aspects, the construction quality is controllable, the diagonal supports and.

At present, the stiffening box girder clapboard of the domestic suspension bridge is mainly of a solid web type and a frame type. Although the solid web type partition plate has high rigidity, the area is overlarge, the stress performance is lowest, the material utilization rate is low, the factory manufacture and assembly are difficult, and the welding quality is difficult to control; the frame type partition plate is hollowed on the basis of the solid web type partition plate, the hollowed part is supported by the supporting rods, the improvement is great compared with the solid web type partition plate, a large-area solid section is still reserved, the material utilization rate still does not reach the optimal state, the supporting rods of the hollowed part are connected with the upper transverse rib and the lower transverse rib through welding seams, the transverse rib can generate large out-of-plane deformation under the action of wheel load, and therefore the joint of the supporting rods and the node plate is cracked, and the durability is affected.

The novel truss type partition plate can well overcome the defects of a traditional solid web type and a frame type, and provides a new structural choice for a suspension bridge stiffening box girder partition plate system.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a novel truss type partition plate for a stiffening steel box girder of a suspension bridge and an operation method thereof.

The technical scheme is as follows:

a novel truss type partition plate for a stiffening steel box girder of a suspension bridge is composed of an upper transverse rib, a lower transverse rib, an inclined strut, a gusset plate, a stiffening rib plate and a high-strength bolt; go up the top of horizontal rib, horizontal rib and stiffening box roof beam down, end, web hoop welding, at last horizontal rib, a plurality of nodes in horizontal rib edge of a wing set up the gusset plate down, link to each other through the bracing between the adjacent gusset plate, through high-strength bolt connection between bracing and the gusset plate, gusset plate and last horizontal rib, the key position of horizontal rib set up a plurality of stiffening rib boards down.

Furthermore, one end of the anchor inclined strut is fixedly connected with the upper node plate in a bolting mode, and the other end of the inclined strut is fixedly connected with the lower node plate in a bolting mode.

Furthermore, a gusset plate is arranged at the corner point position where the stiffening box girder web plate is connected with the bottom plate.

Furthermore, the inclined strut is a double-limb angle steel combined component, and the middle decoration piece adopts a decoration plate.

Furthermore, stiffening ribs are arranged on two sides of the gusset plate and the upper and lower transverse ribs, and stiffening ribs are arranged on two sides of the flange corners of the upper transverse rib and the lower transverse rib.

Furthermore, stiffening ribs are arranged on two sides of the solid partition plate in the bracing box beam end part bracing cable area.

Preferably, the aperture ratio of the partition is 0.7-0.8, the height of the upper cross rib web is not less than 2.5 times of the height of the longitudinal rib of the top plate of the box girder, and the height of the lower cross rib web is not less than 2.0 times of the height of the longitudinal rib of the bottom plate of the box girder.

The operation method of the novel truss type partition plate of the stiffening steel box girder of the suspension bridge comprises the following steps:

step 1, finishing blanking of each steel member of the truss clapboard in a factory.

Step 2, manufacturing the plate units of the upper transverse rib, the lower transverse rib and the solid stay cable partition plate;

and 3, completing the welding of each gusset plate and the upper and lower cross rib flange plates, and then welding corresponding stiffening ribs.

Step 4, splicing the partition plate units into a whole unit on the jig frame after the partition plate units are manufactured, and completing welding;

step 5, connecting the manufactured inclined strut with the upper node plate and the lower node plate through high-strength bolts,

and 6, forming a complete box girder segment with the top and bottom web plate units of the stiffening box girder after the whole partition board is manufactured.

The invention has the beneficial effects that:

the truss type clapboard of the invention is suitable for a large-section stiffening box girder suspension bridge with any span, the truss type clapboard ensures that the inside of the box is quite permeable, has good vision and is convenient for internal maintenance, and is a natural trend of the development of a large-section steel box girder, the surplus clapboard area is dug out, the upper part of the truss type clapboard needs to bear the wheel load, the lower part needs to maintain the section shape rigidity, the middle part supports the upper part and the lower part, the stress of the upper part is reduced, the transverse full-section bending mode is converted into the tension and compression mode of a truss rod piece, the material utilization rate is high, the weight of the clapboard is greatly reduced, the remarkable economic benefit is achieved, secondly, all steel members and main girder segments of the truss type clapboard are manufactured and finished together in a factory, the steel members are small members, the construction quality is controllable in the aspect of installation and welding, the diagonal braces are bolted with the node plates, the later maintenance and replacement are convenient, is suitable for popularization and application.

Drawings

FIG. 1 is a structural half-sectional view of the novel truss-type partition plate of a suspension bridge stiffening steel box girder according to the present invention;

FIG. 2 is a sectional view of an upper node plate structure corresponding to the novel truss-type partition plate of the suspension bridge stiffening steel box girder of the present invention;

FIG. 3 is a cross-sectional view of a lower gusset plate structure corresponding to the novel truss-type partition plate of the stiffening steel box girder of the suspension bridge of the invention;

FIG. 4 is a schematic diagram of the bracing structure corresponding to the novel truss-type partition plate of the suspension bridge stiffening steel box girder of the present invention, wherein A is a schematic diagram of the external structure and B is a schematic diagram of the cross-sectional structure;

FIG. 5 is a schematic view of a node plate structure corresponding to the novel truss-type partition plate of the suspension bridge stiffening steel box girder;

FIG. 6 is a sectional view of a stiffening structure of a solid end partition corresponding to the novel truss-type partition of the stiffening steel box girder for a suspension bridge according to the present invention;

fig. 7 is a sectional view of a baffle plate corner point stiffening structure corresponding to the novel truss type baffle plate of the suspension bridge stiffening steel box girder.

Detailed Description

The technical solutions of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.