CN2740699Y

CN2740699Y - Concrete structure with hollow sandwich layer of steel pipe

Info

Publication number: CN2740699Y
Application number: CN 03281066
Authority: CN
Inventors: 韩林海; 陶忠; 尧国皇
Original assignee: Individual
Current assignee: Fuzhou University
Priority date: 2003-09-30
Filing date: 2003-09-30
Publication date: 2005-11-16
Anticipated expiration: 2013-09-30

Abstract

Disclosed is a novel concrete structure with steel pipe formed by filling with concrete in the interlayer between the two layers of steel tube, in particular to reducing structural dead load and improving structural bending stiffness. The utility model enssures that the cross section geometric centroid of the outer tube and the inner tube are coincident and the outboard steel tube is equal or lower 1 cm-10 cm to the inner steel tube in manufacturing procession. The concrete structure with hollow sandwich layer of steel pipe is divided into circularity sheaths circularity type, square sheaths circularity type, circularity sheaths square type, square sheaths square type, rectangle sheaths rectangle type, square sheaths rectangle type and circularity sheaths rectangle type according to the cross section type. The rolled steel is common strength rolled steel or high-strength rolled steel with more than 550Mpa yield strength. The concrete is common concrete or high-strength concrete with 80-120MPa compression strength and self-dense concrete. The utility model is capable of adopting the thin-wall steel tube concrete which the ratio of steel tube external diameter or outside length to steel tube wall thickness is 40-15.

Description

The concrete-filled double skin steel tube structure

Technical field the utility model relates to a kind of novel encased structures, especially can reduce the novel steel tube concrete structure of the bending rigidity of dead load and raising structure.

Background technology is present, and conventional concrete filled steel tube is that fill concrete forms in the monolayer steel pipe.Concrete filled steel tube utilizes steel pipe and two kinds of material interactions when stressed of concrete, be that steel pipe is under the complex stress condition concrete to concrete effect of contraction, thereby concrete strength is improved, plasticity and toughness properties are greatly improved, simultaneously, because steel pipe generation cripling can be avoided or delay to concrete existence, can guarantee giving full play to of its material property; In addition, in the work progress of concrete filled steel tube, steel pipe can also be as building the template of core concrete, so easy construction and can reduce operating expenses.

A kind of novel steel tube concrete structure that summary of the invention the utility model provides, i.e. fill concrete in two-layer steel pipe interlayer, therefore this encased structures not only has the advantage of common steel tube concrete structure, this novel steel tube concrete structure simultaneously, the middle part is hollow, therefore compare with the steel pipe ordinary concrete, thereby greatly reduce dead load, give full play to the effect of material and save structural cost.The technical scheme that its technical problem that solves the utility model adopts is: fill concrete in two-layer steel pipe, guarantee that the geometric centroid of two-layer steel pipe overlaps, and the middle part is hollow, and the equal or outer steel pipe with interior steel pipe of outer steel pipe is than the low 1cm-10cm of interior steel pipe.The beneficial effects of the utility model are, can greatly reduce dead load thereby reach when having common steel tube concrete advantage, give full play to the effect of material and the purpose of saving structural cost, and are simple to operate.The constantly application in civil works along with high performance material, the utility model can adopt regular tenacity steel or the yield strength high-strength steel more than 550Mpa, concrete can be that ordinary concrete or compressive strength are high-strength concrete and the self-compacting concrete of 80-120MPa, and the ratio that can adopt steel pipe external diameter or the outer length of side and thickness of steel pipe is the thin wall steel tube concrete of 40-150, the advantage of concrete filled steel tube can be further brought into play, better economic effect can be obtained.

Description of drawings further specifies the utility model below in conjunction with drawings and Examples.

1. Fig. 1 to Fig. 7 is a plan view of the present utility model.

2. Fig. 8 to Figure 14 is a utility model China and foreign countries steel pipe and the elevation of the equal situation of interior steel pipe.

3. Figure 15 to Figure 21 is the elevation of the utility model China and foreign countries steel pipe than the low 1cm-10cm situation of interior steel pipe.

More than among each figure: the outer steel pipe of 1-, steel pipe in the 2.-concrete, 3.-

The specific embodiment is made earlier two-layer steel pipe, guarantees the geometric centroid coincidence of outer steel pipe and interior steel tube section, placing of concrete in two-layer steel pipe interlayer then, and the middle part is hollow.Introduce the concrete structure of Fig. 1 to Figure 14 in the accompanying drawing below in conjunction with Figure of description.

(1) Fig. 1, Fig. 8 and Figure 15 are the circle cover circle concrete-filled double skin steel tubes that outer tube and interior pipe are circular cross-section;

(2) Fig. 2, Fig. 9 and Figure 16 are that outer tube is that circular cross-section and interior pipe are the circle cover side concrete-filled double skin steel tube of square-section;

(3) Fig. 3, Figure 10 and Figure 17 are that outer tube is that square-section and interior pipe are side's cover circle concrete-filled double skin steel tube of circular cross-section;

(4) Fig. 4, Figure 11 and Figure 18 are side's cover side's concrete-filled double skin steel tubes that outer tube and interior pipe are the square-section;

(5) Fig. 5, Figure 12 and Figure 19 are the rectangular sleeve rectangular hollow interlayer steel tube concrete that outer tube and interior pipe are the square-section;

(6) Fig. 6, Figure 13 and Figure 20 are that outer tube is that circular cross-section and interior pipe are the circle cover rectangular hollow interlayer steel tube concrete of square-section;

(7) Fig. 7, Figure 14 and Figure 21 are that outer tube is that square-section and interior pipe are the square sleeve rectangular hollow interlayer steel tube concrete of square-section.

Claims

1. novel encased structures, it is characterized in that: fill concrete forms in two-layer steel pipe, equal or the outer steel pipe with interior steel pipe of outer steel pipe is lower slightly than interior steel pipe, the geometric centroid of outer steel pipe and interior steel tube section overlaps, and can to adopt the ratio of steel pipe external diameter or the outer length of side and thickness of steel pipe be the thin wall steel tube concrete of 40-150.

2. encased structures according to claim 1 is characterized in that section form of the present utility model can be the circle cover circle concrete-filled double skin steel tube of circular cross-section for outer tube and interior pipe, outer tube is that circular cross-section and interior pipe are the circle cover side concrete-filled double skin steel tube of square-section, outer tube is that square-section and interior pipe are side's cover circle concrete-filled double skin steel tube of circular cross-section, outer tube and interior pipe are side's cover side's concrete-filled double skin steel tube of square-section, outer tube and interior pipe are the rectangular sleeve rectangular hollow interlayer steel tube concrete of square-section, outer tube is that circular cross-section and interior pipe are the circle cover rectangular hollow interlayer steel tube concrete of square-section, outer tube is that square-section and interior pipe are the square sleeve rectangular hollow interlayer steel tube concrete of square-section.