CN1793587A - Square section concrete short pillar hiden with 'slant strength nucleocenter beam' and mfg. method thereof - Google Patents
Square section concrete short pillar hiden with 'slant strength nucleocenter beam' and mfg. method thereof Download PDFInfo
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- CN1793587A CN1793587A CNA2005101353158A CN200510135315A CN1793587A CN 1793587 A CN1793587 A CN 1793587A CN A2005101353158 A CNA2005101353158 A CN A2005101353158A CN 200510135315 A CN200510135315 A CN 200510135315A CN 1793587 A CN1793587 A CN 1793587A
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- 150000001875 compounds Chemical class 0.000 claims abstract description 25
- 210000003205 muscle Anatomy 0.000 claims description 63
- 230000002787 reinforcement Effects 0.000 claims description 32
- 238000002360 preparation method Methods 0.000 claims description 26
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Abstract
The invention is a concealed 'inclined flexible core beam' rectangular-sectional concrete short pillar and the making method thereof, and its technical solution: it arranges the inclined flexible core beam in the directions of two principal axes of rectangular section of the short pillar, and between vertical bars and horizontal compound stirrups and the upper and lower ends of the inclined flexible core beam vertically extend into the upper and lower beams and are anchored, and is an X-shaped compound steel framework combined of core beam profiled bar, core beam vertical bar, and core beam stirrup, or X-shaped steel framework formed of core beam profiled bar, or X-shaped steel framework combined of core beam vertical bar and core beam stirrup. It can remarkably strengthen the earthquake resistance of the short pillar.
Description
Technical field
The present invention is a kind of built-in " slant strength nucleocenter beam " square-section concrete short column and preparation method, belongs to the structural engineering field.
Background technology
Casualties that violent earthquake causes and property loss are very huge, and the key of antidetonation mitigation is to strengthen the shock resistance of building.Reinforced Concrete Short is the particularly crucial antidetonation parts of high building structure of building structure.Yet the ductility of short column is relatively poor, has influenced giving full play to of its structural entity anti-seismic performance.Therefore, ductility and the comprehensive anti-seismic performance of improving short column is the problem of very paying close attention to both at home and abroad always.The existing scheme of improving short column: 1 adopts high-strength high-performance concrete or fibrous concrete; 2 adopt configuration to encrypt spiral stirrup; 3 adopt the branch scapus.The problem of its existence is, in 1 and 2 schemes, and the building costs height, cost performance is low; Though 3 schemes can be improved ductility, significantly be reduced to cost with bearing capacity, rigidity.
Summary of the invention
Technical problem to be solved by this invention is the problem that significantly improves the short column shock resistance, in order to address the above problem, has designed built-in " slant strength nucleocenter beam " square-section concrete short column.The present invention considers that from anti-seismic performance such as the rigidity that improves short column, ductility, bearing capacity and self energy dissipation capacity angle proposed built-in " slant strength nucleocenter beam " square-section short column, this equally also is the high method of a kind of cost performance.This built-in " slant strength nucleocenter beam " short column is on common short column arrangement of reinforcement basis, all adds built-in " slant strength nucleocenter beam " on two major axes orientations in square-section.The scheme of built-in " slant strength nucleocenter beam " has three kinds, and scheme 1 adds joins shaped steel, vertical muscle and stirrup and form the compound core bundle of oblique stiffness, and is X-shaped; Scheme 2 be do not add in the scheme 1 join vertical muscle and stirrup after, deteriorate to shaped steel as oblique stiffness reinforcing bar core bundle, and be X-shaped; Scheme 3 be do not add in the scheme 1 join shaped steel after, deteriorate to oblique concrete steel core bundle, and be X-shaped.
The concrete technical scheme that the present invention adopts is referring to Fig. 1～Figure 12: vertical muscle 2 of configuration and horizontal compound stirrup in the short column, laterally compound stirrup is made up of rectangle hoop 1 and hexagon stirrup 3, is furnished with slant strength nucleocenter beam between vertical muscle 2 and horizontal compound stirrup.
Described slant strength nucleocenter beam can form cage of reinforcement by vertical muscle 5 of core bundle and affixed thereon core bundle stirrup 4, and the composition slant strength nucleocenter beam is X-shaped.Putting the beams in place 9 and underbeam 10 and short column intersection, in the cage of reinforcement vertical muscle 5 top and bottom of core bundle respectively along put the beams in place 9 and the height of underbeam 10 vertically stretch into and anchoring, anchorage length is respectively puts the beams in place 9 and 2/3～1 times of underbeam 10 height.The cross section of cage of reinforcement is two rectangles, and these two rectangular areas are 1/10～1/6 of short column cross-sectional area, and the depth-width ratio of each rectangle is 1～3/2; The total percentage of reinforcement of the vertical muscle 5 of core bundle that core is intrafascicular is 0.6%～1.2%, and it is the reinforcing bar of 6～8mm that core bundle stirrup 4 adopts diameter, stirrup spacing 100～150mm.
Described slant strength nucleocenter beam can form steel frame by core bundle shaped steel 8, is X-shaped.At upper beam 9 and underbeam 10 and short column intersection, the top and bottom in the steel frame in the core bundle shaped steel 8 are vertically stretched into and anchoring along the height of upper beam 9 and underbeam 10 respectively, and anchorage length is respectively upper beam 9 and underbeam 10 height 2/3～1 times.The cross section of steel frame be two I-shaped, these two I-shaped areas are 1/10～1/6 of short column cross-sectional area, the depth-width ratio of each rectangle is 1～3/2; It is 0.6%～1.2% that the intrafascicular core bundle shaped steel 8 of core is always joined the steel rate.
Described slant strength nucleocenter beam can add the vertical muscle 5 of the core bundle that is wrapped in core bundle shaped steel 8 by core bundle shaped steel 8 and form the clad steel skeleton with the core bundle stirrup 4 that is fixed on the vertical muscle 5 of core bundle, forms slant strength nucleocenter beam and is X-shaped.At upper beam 9 and underbeam 10 and short column intersection, vertical muscle 5 top and bottom of core bundle shaped steel 8 in the clad steel skeleton and core bundle are vertically stretched into and anchoring along the height of upper beam 9 and underbeam 10 respectively, and anchorage length is respectively upper beam 9 and underbeam 10 height 2/3～1 times.The clad steel cross-section of its skeleton is two rectangles, and these two rectangular areas are 1/10～1/6 of short column cross-sectional area, and the aspect ratio of each rectangle is 1～3/2; The vertical muscle 5 of core bundle that core is intrafascicular and the steel rate of always joining of core bundle shaped steel 8 are 0.8%～1.8%, and it is the reinforcing bar of 6～8mm that core bundle stirrup 4 adopts diameter, stirrup spacing 100～150mm.
Built-in " slant strength nucleocenter beam " square-section concrete short column, than existing common short column, branch scapus, can significantly improve the shock resistance of short column, promptly significantly improved rigidity, bearing capacity, ductility, the later stage anti-seismic performance is relatively stable, and the bottom shear sliding rupture alleviates.The slant strength nucleocenter beam that is X-shaped can limit or postpone the development of diagonal crack to main diagonal crack, bootable horizontal curvature crack makes progress many distributions to have increased plastic hinge power consumption region height from the bottom, thinner and close and range of distribution is wide than common short column crack, destructiveness is lighter, bearing capacity and stiffness degradation are slow, particularly importantly can avoid brittle fracture.
Concrete preparation method of the present invention: at first muscle 2 and horizontal compound stirrup are indulged in configuration in short column, and laterally compound stirrup is made up of rectangle hoop 1 and hexagon stirrup 3, only need get final product by the design specifications making.The configuration slant strength nucleocenter beam carries out according to the following steps: the first step: in the skeleton that vertical muscle 2 of short column and horizontal compound stirrup surround, arrange a core Shugu frame that is X-shaped on a major axes orientation in short column cross section, the position in crosspoint is in short column 1/2 eminence; Also arrange a core Shugu frame that is X-shaped on another major axes orientation, the position in crosspoint is higher than the position in previous crosspoint, forms the slant strength nucleocenter beam skeleton; Slant strength nucleocenter beam adopts 3 kinds of schemes.In scheme 1, the periphery of core bundle shaped steel 8 is vertical muscle 5 of core bundle and the core bundle stirrup 4 that is fixed on the vertical muscle 5 of core bundle, thereby forms the clad steel skeleton, and the side direction diagonal is arranged and is X-shaped.On a major axes orientation, two oblique steel frames in the X-shaped clad steel skeleton intersect in short column 1/2 eminence, vertical muscle 5 of the core bundle of one of them oblique skeleton and vertical 5 staggered intersecting of muscle of the core bundle of another oblique skeleton, core bundle shaped steel 8 in two oblique skeletons only all cuts away top flange 13, bottom flange 14 each half in the intersection, form " " shaped sections and another " " shaped sections, then at two oblique skeleton intersection configuration core bundle stirrups 4, because only, formed compound stirrup in the 4 staggered colligations of intersection core bundle stirrup.On another major axes orientation, two oblique steel frame intersections in the X-shaped clad steel skeleton are higher than previous intersection, and other preparation method is identical with above-mentioned preparation method.
In scheme 2, core bundle shaped steel 8 forms steel frame, and the side direction diagonal is arranged and is X-shaped.On a major axes orientation, two oblique steel frames in the X-shaped steel frame intersect in short column 1/2 eminence, wherein the core bundle shaped steel 8 in one or two oblique skeleton only all cuts away top flange 13 and bottom flange 14 each half in the intersection, form " " shaped sections and another " " shaped sections, weld together in this intersection then, formed " worker " shaped sections.On another major axes orientation, two oblique steel frame intersections in the X-shaped steel frame are higher than previous intersection, and other preparation method is identical with above-mentioned preparation method.
In scheme 3, vertical muscle 5 of core bundle and the core bundle stirrup 4 that is fixed on the vertical muscle 5 of core bundle form cage of reinforcement, and the side direction diagonal is arranged and is X-shaped.On a major axes orientation, two oblique steel frames in the X-shaped cage of reinforcement intersect in short column 1/2 eminence, vertical muscle 5 of the core bundle of one of them oblique skeleton and vertical 5 staggered intersecting of muscle of the core bundle of another oblique skeleton, then at two oblique skeleton intersection configuration core bundle stirrups 4, because only, formed compound stirrup in the 4 staggered colligations of intersection core bundle stirrup.On another major axes orientation, two oblique cage of reinforcement intersections in the X-shaped cage of reinforcement are higher than previous intersection, and other preparation method is identical with above-mentioned preparation method in first kind of scheme.
Second step: in short column and upper beam 9 and underbeam 10 intersections, the top and bottom of slant strength nucleocenter beam are all vertically stretched into and anchoring, and anchorage length is respectively upper beam 9 and underbeam 10 height 2/3～1 times;
The 3rd step: last property concreting 6 makes the concrete short column moulding of slant strength nucleocenter beam square-section.
Description of drawings
Fig. 1 is " slant strength nucleocenter beam " concrete short column, and vertical muscle 5 of core bundle and affixed thereon core bundle stirrup 4 form oblique concrete steel core bundles and be an element of construction arrangement of reinforcement schematic diagram of X-shaped;
Fig. 2 is an A-A section enlarged diagram among Fig. 1;
Fig. 3 is a B-B section enlarged diagram among Fig. 1;
Fig. 4 is a C-C section enlarged diagram among Fig. 1;
Fig. 5 is " slant strength nucleocenter beam " concrete short column, and core bundle shaped steel 8 forms oblique stiffness reinforcing bar core bundle and is an element of construction arrangement of reinforcement schematic diagram of X-shaped;
Fig. 6 is an A-A section enlarged diagram among Fig. 5;
Fig. 7 is a B-B section enlarged diagram among Fig. 5;
Fig. 8 is a C-C section enlarged diagram among Fig. 5;
Fig. 9 is " slant strength nucleocenter beam " concrete short column, and core bundle shaped steel 8 adds the vertical muscle 5 of core bundle and is fixed in the element of construction arrangement of reinforcement schematic diagram that the core bundle is indulged the core bundle stirrup 4 formation compound core bundles of oblique stiffness on the muscle 5 and is X-shaped;
Figure 10 is an A-A section enlarged diagram among Fig. 9;
Figure 11 is a B-B section enlarged diagram among Fig. 9;
Figure 12 is a C-C section enlarged diagram among Fig. 9;
Among Fig. 1～Figure 12,1 expression rectangle hoop, the vertical muscle of 2 expressions, 3 expression hexagon stirrups, 4 expression core bundle stirrups, the vertical muscle of 5 expression core bundles, 6 expression concrete, the stirrup of underbeam on 7,8 expression core bundle shaped steel, 9 expressions are put the beams in place, 10 expression underbeams, 11 expression beam top muscle, 12 expression beam bottom muscle, 13 expression top flanges, 14 expression bottom flanges.
The specific embodiment
Second kind of form of structure of built-in " slant strength nucleocenter beam " square-section concrete short column is promptly constituted stiffness reinforcing bar core bundle and is X-shaped by shaped steel, element of construction arrangement of reinforcement such as Fig. 5, Fig. 6, Fig. 7, shown in Figure 8.Constitute oblique reinforcing bar by core bundle shaped steel 8, the cross section of steel frame be two I-shaped.The steel of joining of oblique reinforcing bar is: these two I-shaped areas are 1/10～1/6 of short column cross-sectional area, and the depth-width ratio of each rectangle is 1～3/2.It is 0.6%～1.2% that the intrafascicular core bundle shaped steel 8 of core is always joined the steel rate.On a major axes orientation, two oblique steel frames in the X-shaped steel frame intersect in short column 1/2 eminence, wherein the core bundle shaped steel 8 in one or two oblique skeleton only all cuts away top flange 13, bottom flange 14 each half in the intersection, form " " shaped sections and another " " shaped sections, weld together approximate " worker " shaped sections that formed then in this intersection.On another major axes orientation, two oblique steel frame intersections in the X-shaped steel frame are higher than previous intersection, and other preparation method is identical with above-mentioned preparation method.It is different to be that oblique reinforcing bar is joined among steel and the embodiment 1, others all with embodiment 1 in identical.
The third form of structure of built-in " slant strength nucleocenter beam " square-section concrete short column, the core bundle stirrup 4 that promptly adds the vertical muscle 5 of core bundle by core bundle shaped steel 8 and be fixed on the vertical muscle 5 of core bundle forms oblique stiffness compound reinforcing bar core bundle and is X-shaped, unit arrangement of reinforcement such as Fig. 9, Figure 10, Figure 11, shown in Figure 12.The clad steel cross-section of its skeleton is two rectangles, and these two rectangular areas are 1/10～1/6 of short column cross-sectional area, and the depth-width ratio of each rectangle is 1～3/2.The vertical muscle 5 of core bundle that core is intrafascicular and the steel rate of always joining of core bundle shaped steel 8 are 0.8%～1.8%, and it is the reinforcing bar of 6～8mm that core bundle stirrup 4 adopts diameter, stirrup spacing 100～150mm.On a major axes orientation, two oblique steel frames in the X-shaped clad steel skeleton intersect in short column 1/2 eminence, vertical muscle 5 of four core bundles of one of them oblique skeleton and vertical 5 staggered intersecting of muscle of four core bundles of another oblique skeleton, I-shaped shaped steel 8 in two oblique skeletons only all cuts away top flange 13 in the intersection, bottom flange 14 each half, form a font and cut " " face and another " " shaped sections, then at two oblique skeleton intersection configuration core bundle stirrups 4, because only, formed compound stirrup in the 4 staggered colligations of intersection core bundle stirrup.On another major axes orientation, two oblique steel frame intersections in the X-shaped clad steel skeleton are higher than previous intersection, and other preparation method is identical with above-mentioned preparation method.Be oblique clad steel skeleton arrangement of reinforcement with embodiment 1 in different, others all with embodiment 1 in identical.
Claims (9)
1, built-in " slant strength nucleocenter beam " square-section concrete short column, vertical muscle (2) of configuration and horizontal compound stirrup in the short column, laterally compound stirrup comprises rectangle hoop (1) and hexagon stirrup (3), it is characterized in that: be furnished with slant strength nucleocenter beam between two major axes orientations in short column cross section, vertical muscle (2) and horizontal compound stirrup, these core bundle top and bottom are vertically stretched into and anchoring along the height of upper beam (9) and underbeam (10) respectively; Described slant strength nucleocenter beam is by core bundle shaped steel (8) and is wrapped in the vertical muscle (5) of core bundle of core bundle shaped steel (8) and is fixed in core bundle stirrup (4) on the vertical muscle (5) of core bundle and be combined to form X-shaped clad steel skeleton or form the X-shaped steel frame or indulging muscle (5) and affixed thereon core bundle stirrup (4) by the core bundle is combined to form a kind of in the X-shaped cage of reinforcement by core bundle shaped steel (8).
2, built-in " slant strength nucleocenter beam " according to claim 1 square-section concrete short column, it is characterized in that: the top and bottom of described slant strength nucleocenter beam are in short column and upper beam (9) and underbeam (10) intersection, respectively along put the beams in place (9) from vertically stretching into and anchoring on the short transverse at the bottom of to the beam-ends short transverse with along underbeam (10) at the bottom of the beam from beam-ends to beam, anchorage length is highly 2/3～1 times of uppers beam (9) and underbeam (10).
3, built-in " slant strength nucleocenter beam " according to claim 1 and 2 square-section concrete short column, it is characterized in that: described slant strength nucleocenter beam adds the vertical muscle (5) of core bundle by core bundle shaped steel (8) and is fixed in the core bundle indulges core bundle stirrup (4) on the muscle (5) when forming, the clad steel cross-section of its skeleton is two rectangles, these two rectangular areas are 1/10～1/6 of short column cross-sectional area, and the aspect ratio of each rectangle is 1～3/2; The vertical muscle (5) of core bundle that core is intrafascicular and the steel rate of always joining of core bundle shaped steel (8) are 0.8%～1.8%, and it is the reinforcing bar of 6～8mm that core bundle stirrup (4) adopts diameter, stirrup spacing 100～150mm.
4, built-in " slant strength nucleocenter beam " according to claim 1 and 2 square-section concrete short column, it is characterized in that: described slant strength nucleocenter beam is by core bundle shaped steel (8) when forming, the cross section of steel frame be two I-shaped, these two I-shaped areas are 1/10～1/6 of short column cross-sectional area, and the depth-width ratio of each rectangle is 1～3/2; It is 0.6%～1.2% that the intrafascicular core bundle shaped steel (8) of core is always joined the steel rate.
5, built-in " slant strength nucleocenter beam " according to claim 1 and 2 square-section concrete short column, it is characterized in that: described slant strength nucleocenter beam is combined to form the X-shaped cage of reinforcement when forming by vertical muscle (5) of core bundle and affixed thereon core bundle stirrup (4), the cross section of cage of reinforcement is two rectangles, these two rectangular areas are 1/10～1/6 of short column cross-sectional area, and the depth-width ratio of each rectangle is 1～3/2; The total percentage of reinforcement of the vertical muscle (5) of core bundle that core is intrafascicular is 0.6%～1.2%, and it is the reinforcing bar of 6～8mm that core bundle stirrup (4) adopts diameter, stirrup spacing 100～150mm.
6, built-in " slant strength nucleocenter beam " square-section concrete short column preparation method, at first dispose vertical muscle (2) and horizontal compound stirrup in the short column by design specifications, laterally compound stirrup is made up of rectangle hoop (1) and hexagon stirrup (3), it is characterized in that: the preparation method of configuration slant strength nucleocenter beam is carried out according to the following steps:
[1], in vertical muscle (2) of short column and skeleton that laterally compound stirrup surrounds, core Shugu frame that is X-shaped of layout on a major axes orientation in short column cross section, the position in crosspoint is in short column 1/2 eminence; Also arrange a core Shugu frame that is X-shaped on another major axes orientation, the position in crosspoint is higher than the position in previous crosspoint, forms the slant strength nucleocenter beam skeleton;
[2], in short column and upper beam (9) and underbeam (10) intersection, the top and bottom of slant strength nucleocenter beam are all vertically stretched into and anchoring, anchorage length is respectively 2/3～1 times of upper beam (9) and underbeam (10) height;
[3], at last with short column and upper beam (9) and the whole disturbing concrete of underbeam (10) (6) moulding, promptly constitute built-in " slant strength nucleocenter beam " square-section concrete short column;
Wherein, described slant strength nucleocenter beam is by core bundle shaped steel (8) and is wrapped in the vertical muscle (5) of core bundle of core bundle shaped steel (8) and is fixed in core bundle stirrup (4) on the vertical muscle (5) of core bundle and be combined to form X-shaped clad steel skeleton or form the X-shaped steel frame or indulging muscle (5) and affixed thereon core bundle stirrup (4) by the core bundle is combined to form a kind of in the X-shaped cage of reinforcement by core bundle shaped steel (8).
7, built-in " slant strength nucleocenter beam " according to claim 6 square-section concrete short column preparation method, it is characterized in that: when slant strength nucleocenter beam by core bundle shaped steel (8) be wrapped in the vertical muscle (5) of core bundle of core bundle shaped steel (8) and be fixed in the core bundle and indulge core bundle stirrup (4) on the muscle (5) when forming: in the step [2] on a major axes orientation, two oblique steel frames in the X-shaped clad steel skeleton intersect in short column 1/2 eminence, vertical muscle (5) of the core bundle of one of them oblique skeleton and staggered intersecting of the vertical muscle (5) of the core bundle of another oblique skeleton, core bundle shaped steel (8) in two oblique skeletons only all cuts away top flange (13) in the intersection, bottom flange (14) each half forms one
Shaped sections and another
Shaped sections at two oblique skeleton intersection configuration core bundle stirrups (4), in the staggered colligation of intersection core bundle stirrup (4), forms compound stirrup then; On another major axes orientation, two oblique steel frame intersections in the X-shaped clad steel skeleton are higher than previous intersection, and other preparation method is identical with above-mentioned preparation method.
8, built-in " slant strength nucleocenter beam " according to claim 6 square-section concrete short column preparation method, it is characterized in that: when slant strength nucleocenter beam by core bundle shaped steel (8) when forming: in the step [2] on a major axes orientation, two oblique steel frames in the X-shaped steel frame intersect in short column 1/2 eminence, wherein the core bundle shaped steel (8) in one or two oblique skeleton only all cuts away top flange (13), bottom flange (14) each half in the intersection, forms one
Shaped sections and another
Shaped sections welds together in this intersection then, has formed " worker " shaped sections; On another major axes orientation, two oblique steel frame intersections in the X-shaped steel frame are higher than previous intersection, and other preparation method is identical with above-mentioned preparation method.
9, built-in " slant strength nucleocenter beam " according to claim 6 square-section concrete short column preparation method, it is characterized in that: when slant strength nucleocenter beam is combined to form the X-shaped cage of reinforcement when forming by vertical muscle (5) of core bundle and affixed thereon core bundle stirrup (4): in the step [2] on a major axes orientation, two oblique steel frames in the X-shaped cage of reinforcement intersect in short column 1/2 eminence, vertical muscle (5) of the core bundle of one of them oblique skeleton and staggered intersecting of the vertical muscle (5) of the core bundle of another oblique skeleton, at two oblique skeleton intersection configuration core bundle stirrups (4), formed compound stirrup then at intersection core bundle stirrup (4); On another major axes orientation, two oblique cage of reinforcement intersections in the X-shaped cage of reinforcement are higher than previous intersection, and other preparation method is identical with aforementioned preparation method.
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| CNB2005101353158A CN100353016C (en) | 2005-12-28 | 2005-12-28 | Square section concrete short pillar hiden with 'slant strength nucleocenter beam' and mfg. method thereof |
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| US11661742B2 (en) | 2016-10-14 | 2023-05-30 | Arcelormittal | Steel reinforced concrete column |
| RU2736738C1 (en) * | 2016-10-14 | 2020-11-19 | Арселормитталь | Steel-reinforced concrete column |
| KR102534427B1 (en) * | 2016-10-14 | 2023-05-18 | 아르셀러미탈 | reinforced concrete column |
| CN107882272A (en) * | 2017-10-31 | 2018-04-06 | 启迪设计集团股份有限公司 | Fill wall construction post |
| CN107882272B (en) * | 2017-10-31 | 2020-06-02 | 启迪设计集团股份有限公司 | Constructional column of filling wall |
| CN108824174A (en) * | 2018-08-22 | 2018-11-16 | 云南大学 | A kind of assembled steel reinforced concrete arch-type bridge prefabricated stand column shock-resistant node |
| CN108824174B (en) * | 2018-08-22 | 2024-01-30 | 云南大学 | Prefabricated stand anti-seismic node of assembled reinforced concrete arch bridge |
| CN109667385B (en) * | 2018-12-22 | 2021-07-20 | 广州市天作建筑规划设计有限公司 | Reinforced concrete ultra-short column |
| CN109667385A (en) * | 2018-12-22 | 2019-04-23 | 广州市天作建筑规划设计有限公司 | A kind of ultrashort column of armored concrete |
| CN110126088A (en) * | 2019-04-28 | 2019-08-16 | 南通昆腾新材料科技有限公司 | It is a kind of effectively to overcome prefabricated post of secondary wave and preparation method thereof |
| CN112227798A (en) * | 2020-09-17 | 2021-01-15 | 重庆三峡学院 | Damping device for connecting joint of assembled concrete column and newly-added steel beam |
Also Published As
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|---|---|
| CN100353016C (en) | 2007-12-05 |
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