CN105064530A - Lacing tube lattice type prestressed bending-prevention member - Google Patents
Lacing tube lattice type prestressed bending-prevention member Download PDFInfo
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- CN105064530A CN105064530A CN201510552948.2A CN201510552948A CN105064530A CN 105064530 A CN105064530 A CN 105064530A CN 201510552948 A CN201510552948 A CN 201510552948A CN 105064530 A CN105064530 A CN 105064530A
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- limb
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Abstract
A lacing tube lattice type prestressed bending-prevention member is formed by four prestressed concrete filled steel tube constraint type bending-prevention support branches connected through lacing tubes in a welded mode. The four branches are parallelly arranged in the axis direction, the distance between every two branches is determined through calculation, it is ensured that the distances are equal, every two oblique lacing tubes are connected in a welded mode to form the lattice type bending-prevention member with a square cross section, and the lacing tubes serve as a whole for joint work. The core energy-consuming member with the cross-shaped cross section of each bending-prevention support branch extends out of a corresponding peripheral constraint member at the end, the cross section is enlarged to form an outer extending section larger in bending stiffness, and the core energy-consuming members are in hinged or rigid connection with frame members through connecting plates and high-strength bolts. The bending stiffness of the peripheral constraint members can be greatly improved by adopting lattice type cross sections, further the bearing capacity of bending-prevention supports can be improved, and the lacing tube lattice type prestressed bending-prevention member is suitable for a large-tonnage anti-seismic structure having energy dissipation demand. In addition, the square cross sections can ensure that the slenderness ratios of the member inside and outside a plane can be kept consistent, and the problem that a minor axis loses stability prior to a major axis does not occur. Furthermore, outer-plane constraint is provided for the branches through lacing tube connection, and the phenomenon that the branches lose stability is prevented.
Description
Technical field
The present invention relates to a kind of novel anti-buckling energy-consumption component, particularly one sews the anti-buckling component of pipe lattice prestressing force, belongs to technical field of structural engineering.
Technical background
Anti-buckling component is generally made up of inner core component and peripheral constraint component two parts, is a kind of novel lateral resistant member with remarkable energy-dissipating and shock-absorbing effect.Under little shake effect, anti-buckling component kernel keeps elasticity, for agent structure provides enough anti-side rigidity; Under middle shake and large shake effect, peripheral member provides enough constraints to inner core component, and make kernel total cross-section under tension and compression course under cyclic loading enter surrender, its hysteresis loop is full, the energy of Seismic input can be consumed, be widely used in the reinforcing of newly-built structure and existing structure.
The anti-buckling component of traditional type generally adopts global sections form, and inner core component generally adopts low-yield high ductility steel, is designed to the form of " one " font plate or " ten " font combined member; Peripheral constraint component adopts in round steel pipe or square steel pipe the compound section of filling with concrete and being formed; Leave certain interval between inner core component and peripheral constraint component, the special non-cohesive material of external coating, make it be separated from each other and can Relative sliding, the lateral expansion caused when preventing inner core component pressurized from surrendering and dead by plug.But the anti-buckling component of traditional type is when eccentric compression, the effect of moment of flexure can cause concrete cracking, thus reduce the bending rigidity of peripheral constraint component, reduce the energy dissipation capacity of anti-buckling component under middle shake and large shake effect, for solving the problem that concrete ftractures in advance, the applicant introduces prestressing technique on the basis of the anti-buckling component of traditional type, invent by " a kind of pre-stressed steel pipe concrete restricted type anti-buckling component " of prestressed cable to peripheral constraint component Shi Hanzhang, this anti-buckling component improves concrete cracking load, the rigidity of peripheral constraint component is not degenerated because of concrete cracking, improve the supporting capacity of anti-buckling component under middle shake and large shake effect, reduce distortion.
But along with the development of high-level structure, be no longer only be arranged in a single-store frame to the demand of anti-buckling component, but need to develop into cross over the super-tonnage of multiple floor and the support energy consumption component of overlength size.The anti-buckling component of obvious traditional type and the single anti-buckling component of pre-stressed steel pipe concrete restricted type can not meet this demand.And the proposition of the anti-buckling component of separate type, two anti-buckling point of limbs are connected by flat web or batten plate or wave webs, make the proud expansion in the cross section of peripheral constraint component, improve the rigidity of peripheral constraint component and the total bearing capacity of component, but the anti-buckling component of separate type that two points of limbs are formed, its cross section have strong axle and weak axle point, component is around the bearing capacity of weak axle much smaller than the bearing capacity of component around strong axle, and the advantage that cross section is launched is not played and wastes material.
Summary of the invention
In order to solve the problem, the present invention proposes a kind of many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type sewed pipe and connect.This many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type sewing pipe connection divide limb by the anti-buckling support of four identical cross kernel pre-stressed steel pipe concrete restricted types, tiltedly sew pipe, round steel pipe is strengthened in end and two pieces of closing panels compositions.The anti-buckling support of each cross kernel pre-stressed steel pipe concrete restricted type divides limb jointly to form by cross kernel dissipative member, non-cohesive material, restraining tube round steel pipe, prestressed cable and concrete.Four points of limbs are arranged in parallel in the axial direction, and the spacing of adjacent two points of limbs is determined by calculating and ensures identical, are welded to connect the anti-buckling component of lattice forming square sectional between two, co-operation as a whole by tiltedly sewing pipe.The cross section of the cross kernel dissipative member of each point of limb is amplified in end, thus overhanging section that formation bending rigidity is larger, be then welded on end plate, end plate opened bolt hole and realizes with the hinged of framing component by high-strength bolt or just connect in succession.Simultaneously at the restraining tube steel tube end part of each point of limb, round steel pipe is strengthened in welding end, strengthens the synergy of peripheral constraint component in end of each point of limb.
The present invention proposes one and sews the anti-buckling component of pipe lattice prestressing force.Aim to provide a kind of support energy consumption component possessing more large bearing capacity and better performance, for structure provides lateral resisting effect under little shake effect, under middle shake and large shake effect, not only provide anti-side rigidity, and consume the energy of Seismic input as energy consumer.
A kind of many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type sewed pipe and connect, it is characterized in that, this component divides limb by the anti-buckling support of four identical cross kernel pre-stressed steel pipe concrete restricted types, tiltedly sews pipe 6, two pieces of closing panels 7 and eight radicles and strengthens round steel pipe 8 and form.The anti-buckling support of each cross kernel pre-stressed steel pipe concrete restricted type divides limb all containing with lower component: cross kernel dissipative member 1, non-cohesive material 2, restraining tube round steel pipe 3, prestressed cable 4, concrete 5.
This many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type sewed pipe and connect, its four points of limbs are arranged in parallel in the axial direction, distance between adjacent two points of limbs is identical, determined by design, the anti-buckling component of lattice forming square sectional is welded to connect between two, co-operation as a whole by tiltedly sewing pipe.After each point of limb Shi Hanzhang, single point of limb can not be made to ftracture in advance by restraining tube concrete section tension time curved, thus improve bending rigidity and the bearing capacity thereof in member integrated cross section.
The connection of this many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type and framing component of sewing pipe connection can adopt following way: the cross section of the cross kernel dissipative member of each point of limb is stretched out after end is amplified, then be welded on end plate, thus overhanging section that formation bending rigidity is larger; Bolt hole opened by end plate, realizes with the hinged of framing component by high-strength bolt or just connect in succession.Simultaneously at the restraining tube steel tube end part of each point of limb, round steel pipe is strengthened in welding end, strengthens the contact of peripheral constraint component in end of each point of limb, so that the shearing action that effectively opposing end is larger.
Advantage of the present invention mainly contains: (1) lattice cross section increases the moment of inertia in anti-buckling member integrated cross section and overall bending rigidity, is applicable to the design of overlength and the anti-buckling component of super-tonnage; (2) square sectional makes be consistent with out-of-plane slenderness ratio in member planar, there will not be weak axle prior to the problem of strong axle unstability; (3) tiltedly sewing pipe divides limb to provide face outer support for each anti-buckling support, prevents a point limb unstability; (4) each point of limb adopts the anti-buckling component of pre-stressed steel pipe concrete restricted type, can make full use of concrete compressive strength, make concrete to shift to an earlier date crack in tension, the bearing capacity of each point of limb is utilized effectively; (5) supporting base end portion is formed after welding with end plate after being expanded by cross kernel dissipative member cross section, can be connected with framing component easily by high-strength bolt; (6) kind and the connected mode of the anti-buckling component of large-tonnage is supplemented, for structure design and reinforcing provide larger range of choice.
Accompanying drawing explanation
Fig. 1 is the sectional view that the present invention sews the many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type that pipe connects;
Fig. 2 is the lateral view that the present invention sews the many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type that pipe connects;
Fig. 3 is the graphics that the present invention sews the many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type that pipe connects;
Fig. 4 is the three-dimensional, exploded view that the present invention sews the many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type that pipe connects;
Fig. 5 is that the present invention sews anti-buckling support in the many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type that pipe connects and divides the three-dimensional, exploded view of limb.
Detailed description of the invention
By the present invention with sew pipe and to be connected but the many points of anti-buckling components of limb steel pipe concrete restricted type of Shi Hanzhang do not contrast, the benefit that quantitative analysis prestressing force brings.
Remembering that single anti-buckling support divides the kernel of limb to bear axial pressure is N, suppose that four points of limbs are equidirectional bending and sag is identical, extruding force between the peripheral constraint component of each point of limb and inner core component distributes according to single ripple sinusoidal pattern, and span centre extruding force amplitude is q
0, axial pressure N/4 and q
0between meet linear relationship, namely the distribution function of extruding force is q=q
0sin (π x/L), wherein L is the length of peripheral constraint component.The peripheral constraint component power effect that is squeezed is in by curved state, and its mid span moment is maximum, and thus span centre concrete the most easily ftractures.After anti-buckling support peripheral constraint component Shi Hanzhang, the tensile strength of single point of limb peripheral concrete material is by f
tbring up to f
t+ P
c/ A
c, be equivalent to improve concrete cracking load, wherein P
cfor the prestressing force that single point of limb concrete section is shared, A
cfor concrete section amasss.Suppose that anti-buckling bearing length is 30m, tiltedly sew tube section and be of a size of 200 × 5mm, adjacent two anti-buckling supports divide the distance between the axis of limb to be 1100mm, single restraining tube steel tube section is of a size of 412 × 6mm, concrete section diameter is 400mm, and kernel four-bladed vane adopts the cross bar of wide 200 × 30mm and material is Q235.Concrete grade is C60, and tensile strength is 2.04MPa.During non-Shi Hanzhang, during concrete cracking, mid span moment is 306.00kNm.After by prestressed cable concrete being applied altogether to the precompression of 1200kN, during concrete cracking, mid span moment can bring up to 568.30kNm, improves 85.7% compared with non-Shi Hanzhang.Therefore, if the failure state using concrete cracking as anti-buckling support, then adopt prestressing technique to make concrete cracking moment of flexure improve 85.7%.Consider external load and mid-span deflection linearly positive correlation, support mid-span deflection and become large along with the increase of end axis power, the axial bearing capacity of so anti-buckling support improves 36.3%.Visible, Shi Hanzhang on the basis of traditional anti-buckling support of many points of limbs, can bring considerable economic benefit.
Below in conjunction with accompanying drawing 1 ~ 5, describe the specific embodiment of the present invention in detail.
As shown in Figures 1 to 3, a kind of many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type sewing pipe connection comprise with lower component:
1---cross kernel dissipative member;
2---non-cohesive material;
3---restrained circle steel pipe;
4---prestressed cable;
5---concrete;
6---tiltedly sew pipe;
7---closing panel;
8---round steel pipe is strengthened in end;
9---prestressed cable ground tackle;
As shown in Fig. 1,3,4, the many points of anti-buckling components of limb pre-stressed steel pipe concrete restricted type that wave webs connects divide limb by the anti-buckling support of four identical cross kernel pre-stressed steel pipe concrete restricted types, tiltedly sew pipe 6, two blocks of closing panel plates 7 and eight radicles and strengthen round steel pipe 8 and form.
As shown in Fig. 1,3,4, the anti-buckling support of each cross kernel pre-stressed steel pipe concrete restricted type divides limb to be made up of cross kernel dissipative member 1, non-cohesive material 2, restraining tube square steel pipe 3, prestressed cable 4 and concrete 5; Each anti-buckling support divides in limb, cross kernel dissipative member 1 totally, adopts the yi word pattern cross section steel plate of three pieces of low-intensity high ductility to be welded to form; As shown in Figure 1, at cross kernel dissipative member 1 external coating non-cohesive material 2, be separated with the concrete 5 poured into a mould in restraining tube square steel pipe 3, make to retain certain interval between built-in concrete 5 and cross kernel dissipative member 1 to meet the requirement of cross kernel dissipative member 1 pressurized swell increment; Each anti-buckling support divides in limb, prestressed cable 4 totally four, is evenly distributed on cross kernel dissipative member 1 surrounding, along the elongated layout in component length direction, prestressed cable 4 is anchored on the concrete of peripheral constraint component at two ends by prestressed cable ground tackle 9, applies precompression to concrete;
As shown in Fig. 2,5, cross kernel dissipative member 1 stretches out restraining tube round steel pipe 3 after end cross-sectional expands, form overhanging section that bending rigidity is larger, be then welded on closing panel 7, realize with the hinged of framing component by junction plate and high-strength bolt or just connect in succession.Simultaneously at the restraining tube steel tube end part of each point of limb, round steel pipe 8 is strengthened in welding end, strengthens the contact of peripheral constraint component in end of each point of limb.
Claims (2)
1. sew the anti-buckling component of pipe lattice prestressing force for one kind, it is characterized in that, divide limb containing the anti-buckling support of cross kernel pre-stressed steel pipe concrete restricted type, tiltedly sew pipe (6), closing panel (7) and end and strengthen round steel pipe (8); Have the anti-buckling support of four cross kernel pre-stressed steel pipe concrete restricted types in described component and divide limb, each point of limb forms jointly by cross kernel dissipative member (1), non-cohesive material (2), restraining tube round steel pipe (3), prestressed cable (4) and concrete (5); Described four anti-buckling supports divide limb to be arranged in parallel in the axial direction, and the distance between adjacent two points of limbs is identical, are determined by design; The anti-buckling component of lattice forming square sectional is welded to connect between two, co-operation as a whole by tiltedly sewing pipe.
2. anti-buckling component according to claim 1, it is characterized in that, the cross section of the cross kernel dissipative member of described each point of limb is amplified in end, first form overhanging section that bending rigidity is larger, then be welded on end plate, bolt hole opened by end plate, realizes with the hinged of framing component by high-strength bolt or just connect in succession; At the restraining tube steel tube end part of each point of limb, round steel pipe is strengthened in welding end, strengthens the contact of peripheral constraint component in end of each point of limb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552948.2A CN105064530A (en) | 2015-09-01 | 2015-09-01 | Lacing tube lattice type prestressed bending-prevention member |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552948.2A CN105064530A (en) | 2015-09-01 | 2015-09-01 | Lacing tube lattice type prestressed bending-prevention member |
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| CN105064530A true CN105064530A (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435376A (en) * | 2017-08-22 | 2017-12-05 | 深圳市建筑设计研究总院有限公司 | Strong frame frame structure |
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2015
- 2015-09-01 CN CN201510552948.2A patent/CN105064530A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435376A (en) * | 2017-08-22 | 2017-12-05 | 深圳市建筑设计研究总院有限公司 | Strong frame frame structure |
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Application publication date: 20151118 |
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