CN203066357U - Large-span arch-shaped steel truss structure - Google Patents
Large-span arch-shaped steel truss structure Download PDFInfo
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- CN203066357U CN203066357U CN2012205733749U CN201220573374U CN203066357U CN 203066357 U CN203066357 U CN 203066357U CN 2012205733749 U CN2012205733749 U CN 2012205733749U CN 201220573374 U CN201220573374 U CN 201220573374U CN 203066357 U CN203066357 U CN 203066357U
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- steel truss
- arch
- support column
- shaped steel
- rod
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Abstract
The utility model discloses a large-span arch-shaped steel truss structure. The large-span arch-shaped steel truss structure comprises a support column, and an arch-shaped steel truss installed on the support column, wherein tie bars are arranged at the both ends of the support column, the arch-shaped steel truss is provided with an upper chord rod and a lower chord rod, and a web rod is installed between the upper chord rod and the lower chord rod. The large-span arch-shaped steel truss structure is characterized in that an inclined rod is erected on the arch-shaped steel truss and the support column; one end of the inclined rod is fixed at the 1/4 to 1/2 part of the junction of the arch-shaped steel truss and the support column; the other end of the inclined rod is fixed at the junction of the tie bars and the support column; a support rod is fixed between the arch-shaped steel truss and the inclined rod; after the inclined rod is arranged, the section of the arch-shaped steel truss meets the stress states of members better, and the original stability control is improved to be stress control, so that the stress ratio of each member of the whole arch-shaped steel truss is increased, the sections of the members are reduced, the rise is effectively reduced, and then construction cost and investment water can be reduced.
Description
Technical field
The invention belongs to the technical field of building trade structural steelwork, be specifically related to a kind of structure and job practices thereof of large span arch steel truss.
Background technology
Space structures worldwide obtains fast development at present, in numerous space structures, the arch steel truss is compared with other constructional materials such as concrete, masonry and space member, have following characteristics: (1) intensity height, materials are few, short construction period, and span ability is big, integrate stressed, maintenance function, be specially adapted to big or very big member and the structure of load of span.(2) steel also have the characteristics of plasticity and good toughness, and plasticity is good, and structure under general condition can be because of overload fracture suddenly; Good toughness, structure is strong to the compliance of dynamic loading.Good energy absorption ability and ductility also make steel work have superior anti-seismic performance.(3) the steel interior tissue compares close to even matter and isotropism, and almost is perfectly elastic in certain amplitude of stress.Therefore, the actual loading situation of steel work and engineering mechanics result of calculation relatively meet.(4) the steel work manufacturing is easy, short construction period.Though the density of steel is bigger than constructional materialss such as concrete, steel work is lighter than reinforced concrete structure, and reason is that the intensity of steel is more much bigger than concrete with the ratio of density.Bear same load with same span, the weight of steel roof truss is no more than 1/3 to 1/4 of steel concrete roof truss at most, light gauge cold-formed steel shape roof truss even near 1/10, for lifting provides the condition that makes things convenient for.In recent years, the engineering practice of China shows that it has significant technical economic benefit and social benefit, has vast potential for future development, will become one of important development direction of lightweight steel construction.
At present, China's Steel Structure Industry is just entering the fast-developing stage.But the construction steel amount in China every year only 1% is used to the pre-manufactured steel structure, with the amount ratio of developed country more than 80%, gap is huge.And the saving cost is the lifeline of developer's exploration project, and the cost Control of engineering plays vital decisive role to whole engineering, and the design optimization of steel work is imperative.
Structure aspects at large span arch steel truss, existing large span arch steel truss method for designing, its steel component strength is often controlled by stability, can there be the cross binding of the upper and lower string of truss and rigid tie bar to be improved out-of-plane the stablizing of arch steel truss, but in the steel truss plane, still there is not a kind of maturation and practicable technical scheme is improved its stability, cause the upper and lower chord member of steel truss cross section excessive, and the steel column cross section of sub-truss is excessive, and because will solving the amount of deflection problem of steel truss, and the steel component strength can not be given full play to.
Summary of the invention
The purpose of this utility model provides that a kind of structure that can overcome existing large span arch steel truss exists, the problem that the rigidity of steel truss and amount of deflection are not enough, make the arch steel truss improve the rod member stress ratio, to reduce and provide new design scheme aspect the investment of structural steelwork cost, can large-scale application in occasions such as bridge, airport, megastore, sports palace.
The technical solution of the utility model is achieved in that
A kind of large span arch steel truss structure, comprise support column and the arch steel truss that is installed on the support column, there is tension rib at the support column two ends, described arch steel truss is provided with upper chord and lower chord, between upper chord and the lower chord web member is installed, it is characterized in that: putting on the shelf at arch steel truss and support column is provided with brace, brace one end is fixed on 1/4 to 1/2 place that the arch steel truss is connected with support column, the other end is fixed on the junction of tension rib and support column, and pole is fixedly arranged between arch steel truss and the brace.
The cross section of described brace is circular, square or polygonal hollow steel tube.
The cross section of described brace is square, rectangle, I shape or L type.
Above large span arch steel truss structure is a kind ofly during greater than 30m, to utilize adding of brace member in span, reduces the steel truss member section to reach, and then reduces the technical scheme of construction investment cost.
Description of drawings:
Fig. 1: a kind of large span arch steel truss structure figure that has added diagonal supporting member.
Fig. 2: a kind of large span arch steel truss structure figure that does not add diagonal supporting member.
The partial enlarged drawing of Fig. 3: Fig. 1.
The specific embodiment
See from accompanying drawing 1, large span arch steel truss structure, comprise support column and the arch steel truss that is installed on the support column 7, there is tension rib 3 at support column 7 two ends, described arch steel truss is provided with upper chord 1 and lower chord 4, upper chord 1 and lower chord are equipped with web member 2 between (4), it is characterized in that: putting on the shelf at arch steel truss and support column 7 is provided with brace 5, brace 5 one ends are fixed on 1/4 to 1/2 position that the arch steel truss is connected with support column 7, the other end is fixed on the junction of tension rib 3 and support column 7, between arch steel truss and the brace 5 pole 6 is arranged fixedly.The cross section of brace 5 also can be square, rectangle, I shape, L type or deformed steel for circular, square or polygonal hollow steel tube.
Accompanying drawing 2 is not improved large span arch steel truss structure figure, recognize among the figure, not improved large span arch steel truss structure does not have brace 5 and pole 6, the arch steel truss will adopt the bigger steel of diameter or cross section, consumptive material is many, cost is corresponding just high, and the large span arch steel truss structure of accompanying drawing 1, upper chord 1 and the lower chord 4 rod member intensity of arch steel truss are brought into play, reduce the moment of flexure of support column 7 simultaneously, reduce the cross section of pricncipal rafter 1 and lower chord 4 and support column 7, saved steel, reduced construction costs and investment.
Application Example:
As shown in Figure 1, brace 5 is set between arch steel truss and support column, and between the brace 5 that newly adds and arch steel truss lower chord, pole 6 is set, to strengthen both connections, make inclined-plane support bar and steel truss form a new firm integral body.The steel column section area is φ 203x9.0, and upper and lower chord member section area is φ 95x7.0, and the weight of single Pin arch steel truss is 3390kg.
Accompanying drawing 2, not improved arch steel truss is under identical design parameters, and the section area of each rod member all increases substantially, and it is φ 245x16.0 that the steel column section area increases, and it is φ 121x8.0 that upper and lower chord member section area increases.
Accompanying drawing 2 has reduced brace 5 and pole 6 with respect to accompanying drawing 1 scheme, and rod member not only increases than the section area in the accompanying drawing one, and weight also increases substantially 3575kg/ Pin.Therefore, the scheme of setting up diagonal brace in the accompanying drawing 1 can save 5.5% than the scheme cost of accompanying drawing 2, and the cost of whole engineering is played the effect of getting instant result, and the enforcement easy operating of scheme, and is remarkable to large span arch steel truss design optimization effect.
The lower chord of arch steel truss because of the adding of brace 5, has reduced the calculated length in the truss plane, and the control of rod member bearing capacity is improved as by Stress Control by original stability control, and rod member intensity is given full play to, and bearing capacity improves.
The arch steel truss is at two end bearing places, originally the power that reached on the support column is horizontal force, support column is bigger because of excessive its cross section that makes of moment of flexure that lateral force causes, initiate brace 5 supports, make a part of horizontal force change vertical force at the bearing place and be passed to support column, and parts transversely active force and application point are moved down, reduced the arm of force, and then reduced moment of flexure, make as the steel column cross section of supporting to reduce.
Claims (3)
1. large span arch steel truss structure, comprise support column and the arch steel truss that is installed on the support column (7), there is tension rib (3) at support column (7) two ends, described arch steel truss is provided with upper chord (1) and lower chord (4), between upper chord (1) and the lower chord (4) web member (2) is installed, it is characterized in that: putting on the shelf at arch steel truss and support column (7) is provided with brace (5), brace (5) one ends are fixed on 1/4 to 1/2 position that the arch steel truss is connected with support column (7), the other end is fixed on the junction of tension rib (3) and support column (7), and pole (6) is fixedly arranged between arch steel truss and the brace (5).
2. large span arch steel truss structure according to claim 1 is characterized in that: the cross section of brace (5) is circular, square or polygonal hollow steel tube.
3. large span arch steel truss structure according to claim 1 is characterized in that: the cross section of brace (5) is square, rectangle, I-shaped or L shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205733749U CN203066357U (en) | 2012-11-02 | 2012-11-02 | Large-span arch-shaped steel truss structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205733749U CN203066357U (en) | 2012-11-02 | 2012-11-02 | Large-span arch-shaped steel truss structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203066357U true CN203066357U (en) | 2013-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205733749U Expired - Fee Related CN203066357U (en) | 2012-11-02 | 2012-11-02 | Large-span arch-shaped steel truss structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN203066357U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113711A (en) * | 2015-10-15 | 2015-12-02 | 中山市凯兴达幕墙装饰工程有限公司 | Large-span daylighting roof steel frame |
| CN105568840A (en) * | 2014-10-17 | 2016-05-11 | 任丘市永基建筑安装工程有限公司 | Application of steel bow bridge in municipal road |
-
2012
- 2012-11-02 CN CN2012205733749U patent/CN203066357U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568840A (en) * | 2014-10-17 | 2016-05-11 | 任丘市永基建筑安装工程有限公司 | Application of steel bow bridge in municipal road |
| CN105113711A (en) * | 2015-10-15 | 2015-12-02 | 中山市凯兴达幕墙装饰工程有限公司 | Large-span daylighting roof steel frame |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20211102 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |