CN1017537B - New and old structure jointer for old building height-adding - Google Patents

Abstract

The present invention relates to a connector for a new structure and an old structure, which can effectively connect a new addition layer structure and an original lower-layer structure under the condition of newly adding a plurality of storey structures on the basis of an original lower-layer building. On the premise that the present invention has no influence on keeping independent stress of the new addition layer structure, the present invention reduces the free length of the frame post of the new addition layer structure, enhances the stability of the new addition structure, ensures the coordinate deformation of a new structure and an old structure, enhances the integrity of the whole building, overcomes harm caused by the mutual connection of the vertical displacement of the new addition layer to the original low-layer structure, and increases the number of new addition stories greatly.

Description

New and old structure jointer for old building height-adding

The technical field of the invention; With regard to its function of use the present invention be used on old low-rise building (being lower than 6 layers building) position, add again high which floor when forming highrise building, the building that newly adds itself is a stress system independently, employed a kind of old and new structure connector when new construction is connected with original building structure.Therefore the building fittings that belongs to a kind of specific function of using in the building engineering field.

On the position of original old building, when newly increasing the newly-built adding storey structure more than 2～3 layers, because the floor quantity that newly adds is too much, load is overweight, therefore requiring newly-built adding storey structure must be independently stressed system, the method that solves is to adopt all around cast-in-place elongated reinforced concrete post of frame construction along former low-rise building at present, fluid concrete crossbeam when surpassing the roof absolute altitude, constitute a big portal frame of throwing off fully with former low-rise building, bear whole loads of the adding storey structure that its top newly adds, also throw off with former low-rise building on the basis of frame column.This big gate-type frame structure system itself has constituted independently stressed system certainly.But because economic problems, the section of frame column own can not be excessive, its length also surpasses former low-rise building height overall, therefore frame column is not only thin but also long under the adding storey structure vertical uniform load q, for want of with the getting in touch of former low-rise building, cause horizontal unstability easily, under horizontal loads, can make framework be difficult to self and bear.Particularly under seismic loading, the horizontal movement of frame column, horizontal movement greater than former low-rise building, and direction of displacement may be inconsistent, therefore will cause the collision between the new and old building thing, desires to address the above problem, require the newly-built frame column that adds layer to be connected with former low layer structure at each floor absolute altitude place of low-rise building, reduce the horizontal drift of each frame column effectively, increase the stability of frame column, fuse with former low-rise building structure owing to frame column in addition.Under horizontal loads, can make new adding storey structure present in phase transverse horizontal displacement with former low layer structure, avoided the damaged in collision of new and old building thing.The lateral deformation of also having avoided framework to occur.

Purpose of the present invention just provides and a kind ofly can guarantee that newly-built adding storey structure itself is an independently stressed system, increases burden for former low layer structure, can guarantee that again new adding storey structure fuses with former low layer structure.Strengthen the stability of new adding storey structure, and coordinate the horizontal direction displacement deformation at new adding storey structure employed old and new structure connector when interlayer position between the former low layer structure is connected.

Content of the present invention, provide out a kind of old and new structure connector of forming by three parts, one is for transmitting company's worn part 5 of former old building structure horizontal force, one side is connected by cast-in-situ concrete anchorage style or pre-buried welding manner at floor absolute altitude place with former low layer structure, and opposite side links to each other by the axis hole fit system with the connection control unit 7 of old and new structure connector.It two is connected by cast-in-situ concrete anchorage style or pre-buried welding manner with frame column for transmitting newly-built new parts 6 one sides of layer company of frame column horizontal force that add, opposite side also is connected by the axis hole fit system with the connection control unit 7 of old and new structure connector, it three is to connect worn part 5 and the connection control unit 7 that connects new parts 6, it is one the positioner cylinder part is housed up and down, can adopt the pin part of cottor pin location, also can adopt the bolt of nut nut location, for the new parts of the company of assurance 6 can free relatively displacement with connecting between the worn part 5, the diameter of connection control unit 7 should be assembling movingly less than the aperture that is connected on connecting new parts 6 and connecting worn part.

The new parts 6 of the company of old and new structure connector are identical with the basic building block that connects 5 liang of parts of worn part, form by three parts, the first is used for connector is anchored at anchoring piece 8,9 on former low layer structure and the new adding storey structure respectively, it two is that a side is connected with anchoring piece 8,9, the rectangle end plate 10,11 that opposite side is connected with force transmitting board 12,13; It three is to have vertical being connected with end plate of force transmitting board 12,13, one ends of installing hole 14,15 on it.Like this by anchoring piece 8,9,12,13 3 parts of end plate 10,11 and force transmitting board have been formed and have been constructed identical company's worn part 5 and Lian Xin parts 6.The length of connection control unit 7 should be calculated to determine according to the maximum distortion size that connects new parts and the force transmitting board thickness that connects worn part and new adding storey structure and former low layer structure, the mounting means of old and new structure connector is, to connect earlier can by welding or pre-buried anchor rib mode on worn part 5 is anchored at former low layer structure floor position by anchoring piece 8 the structure, during installation, force transmitting board 12 is in and the floor parallel position, and at this moment installing hole 14 up.Secondly installation connects new parts 6, below force transmitting board 13 company's of being inserted in worn part force transmitting boards 12 of the new parts of the company of being about to, installing hole 15 on it is alignd with the installing hole 14 that connects worn part, two force transmitting boards 12,13 stack, then connection control unit 7 is inserted in the installing hole 14,15, fix its termination up and down, and check whether connection control unit is state movingly with installing hole 14,15.At last, when the frame column of the new adding storey structure of construction, the anchoring piece 9 that connects new parts 6 is cast among the post concrete, or adopt the built-in fitting welding manner to connect, stressed evenly, unlikely blocked up in order to make force transmitting board, force transmitting board on each new parts or the worn part all is no less than two, weld together with end plate 10,11, new parts of mounted company and the spacing that connects adjacent two force transmitting boards on the worn part must surpass the maximum value of new adding storey structure with relative displacement between the former low layer structure.For avoiding rotating, the installing hole on every force transmitting board also must not be less than two, for avoiding transmitting the off-centre of horizontal force, the focus point of installing hole circle center line connecting on the force transmitting board.Connect the stressed point of resultant force of new parts anchoring piece, and even the stressed point of resultant force three of worn part anchoring piece must be a straight line, each parts material therefor of whole old and new structure connector can adopt mild steel or medium carbon steel.

The invention has the advantages that and only solved the problem that new adding storey structure and former low layer works are thrown off on stressed in the prior art, make new adding storey structure form an independently stressed system (referring to Fig. 2), do not solve the connectivity problem of new adding storey structure with former low layer structure.The invention provides after the old and new structure connector, can make and newly add layer under the prerequisite of maintenance self independent stressed system, connect effectively with former low layer structure, dwindled the drift of frame column, strengthened the stability of new adding storey structure, guaranteed the compatible deformation of new adding storey structure, strengthened the whole building building globality of (comprise and newly add layer) with former low layer structure.The make of this old and new structure connector can overcome the immerge because of new adding storey structure effectively simultaneously, the structure stress distortion, creep and shrink the harm that causes when waiting vertical displacement that brings that new adding storey structure is connected with former low layer structure, solved this a great problem.Owing to adopt this old and new structure connector, might realize that just the number of plies of new adding storey structure breaks through the quantity that former low layer structure at most only adds 1～2 layer, now can be added to 7～10 layers (referring to Fig. 1).The land costs of direct saving; The original building demolition expense; Compensation for removal; The expenses such as cost of original building itself are conspicuous, are added to 9 floors and remove the economic comparative statistics that 4 floor are repaiied two kinds of scheme of 9 floor again according to one 4 floor, and the former can save 700,000 yuan investment.Like this, the building of building is many more, and the quantity of monetary savings is just big more.

Elaborate with accompanying drawing below:

Fig. 2 does not adopt the schematic diagram of the new adding storey structure independent stressed of old and new structure connector system.Fig. 1 has adopted old and new structure connector can newly add the schematic diagram that floor quantity greatly increases.Fig. 3 old and new structure connector scheme of installation.Company's worn part of Fig. 4 a old and new structure connector, the new parts of the company of b old and new structure connector.Fig. 5 links control assembly.Anchoring piece 8,9 has adopted 4 hook type anchor bars in the new parts of company's worn part among Fig. 4 and company, one end is welded on the end plate 10,11, all anchor bar is cast in the former low layer structure coagulation (as collar tie beam), in new adding storey structure frame column concrete, anchor rib length and diameter require to calculate according to stressed and structure.End plate 10,11 has adopted 240 * 300 * 20 millimeters rectangular steel plates, one face down bonding has anchor bar 8,9, opposite side is welded with force transmitting board 12,13, note the welding position and the welding position of force transmitting board 12,13 of anchor bar 8,9, and the position etc. in installing hole 14,15 centers of circle is all designed according to point of resultant force principle symmetric position point-blank on the force transmitting board. Force transmitting board 12,13 has adopted 400 * 240 * 20 millimeters rectangular steel plates to make, and an end is welded on the end plate 10,11, and the other end is whittled into fillet for two jiaos, and the position, axis is drilled with two installing holes 14 or 15, and distance of center circle is 200 millimeters, and the aperture is 34 millimeters.Two force transmitting boards on same end plate, the centreline spacing of plate is 100 millimeters, the determining of plate centreline spacing is according to the thickness of force transmitting board and consider to surpass the maximum value of new adding storey structure and the vertical relative displacement of former low layer structure, calculating and getting.Referring to Fig. 3 and Fig. 5, connection control unit has adopted 300 millimeters of length overalls, diameter is that 30 millimeters snap bolt inserts after the installing hole 14,15 of force transmitting board, because of the installing hole diameter is 34 millimeters, greater than 30 millimeters, die into can be movingly, on the force transmitting board 12 of nut 16 company's of dropping on worn parts 5, nut 18 turn round connect 6 times force transmitting boards 13 of new parts below screw rod 17 on.Can find out referring to Fig. 3 on the force transmitting board 13 of the new parts 6 of force transmitting board 12 companies of being installed in that connect worn part 5, when new adding storey structure sinks or be out of shape, the force transmitting board 13 that connects new parts 6 can free slippage downwards, does not influence horizontal force mutual transmission by old and new structure connector between new adding storey structure and former low layer structure.

The present invention has carried out the standard serialization design, can make the typing building fittings of special purposes, uses for newly-built adding storey structure.Also can be according to concrete building object.By force analysis and structural calculation, design parameters manufacturing or special-purpose old and new structure connector at a certain concrete building, as the function building accessory, use for this building.

Claims (1)

1, a kind of newly-built portal frame and mutual old and new structure connector connected horizontally of old building when increasing building on old tier building is characterized in that:

A. on the column of new construction and in the mixed pedosphere beam of every layer of reinforcing bar of old structure, bury pre-buried link 6 and 5 respectively underground;

B. being no less than on two the power transmission connector 12,13 in pre-buried parts 5,6, offered installing hole 14,15 respectively;

C. connection control unit 7 is passed superimposed power transmission connector 12,13 mesopores 14,15, and connection control unit 7 can be positioner and cylinder part are housed up and down, as opening shop bolt or bolt;

D. the distance that is at least between two power transmission connectors 12,12,13,13 on each built-in connection 5,6 is the maximum value of the relative vertical displacement of new and old structure.

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