CN105155732A - Encased multi-cavity profiled steel plate concrete-filled combined shear wall - Google Patents
Encased multi-cavity profiled steel plate concrete-filled combined shear wall Download PDFInfo
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Abstract
The invention relates to an encased multi-cavity profiled steel plate concrete-filled combined shear wall, which is characterized in that two profiled steel plates oppositely arranged are filled with concrete, multiple thin steel plates as long as the combined shear wall are welded in the combined shear wall at intervals, and steel columns are respectively welded at the two ends of the profiled steel plates, so that the combined shear wall is formed into a peripheral closed structure; the profiled steel plates are wave-shaped; and the thin steel plates are welded at equal intervals. According to the encased multi-cavity profiled steel plate concrete-filled combined shear wall, the thin steel plates are welded between the two profiled steel plates to serve as stiffening ribs and connecting pieces; the closed profiled steel plates have a strong restraint effect on the concrete; and the stable bearing capacity of the profiled steel plates is improved due to the existence of the stiffening ribs, so that the deformation capacity of the combined wall is improved while higher compression bearing capacity of the combined wall is guaranteed, the structure of shear connectors is simplified, and the material utilization rate is improved.
Description
Technical field
The present invention relates to a kind of novel combined member, belong to technical field of structural engineering, be specifically related to a kind of outer multi-cavity profiled sheet concrete filled compound shear wall, it is applicable to multi-rise building structure.
Background technology
In the structure design of highrise building, Lateral Resistant System be selected to vital factor.Shear wall is the efficient configuration component resisting horizontal force in building.From masonry the earliest, build shearing force wall, to reinforced concrete shear wall, steel plate shear force wall, being the process of a structure towards high-strength, lightweight, high ductility, efficient construction development, is also the process meeting day by day high, large, the complicated structure function demand of building.Reinforced concrete shear wall with good integrity, rigidity is large, lateral deformation is little and opposing wind load and medium-small leve earthquake is effective and fireproof performance is good advantage are subject to the favor of numerous designers, but the shortcoming of himself (such as rigidity is excessive, ductility is less, crack produces comparatively early, stressed later stage be difficult to repair based on shear failure, after shake) seriously constrains its application, simultaneously the size of reinforced concrete shear wall and deadweight all larger, occupy the usable floor area of house preciousness and add the burden of architecture basics.The steel plate shear force wall of general type has lot of advantages: ductility and Hysteresis Behavior are all better, and hysteretic loop is stablized, and energy dissipation capacity is strong, and anti-seismic performance is superior; Compared with reinforced concrete shear wall, the size of steel plate shear force wall and deadweight all smaller, geological process is also little, saves space that structure takies and reduces the burden on basis; In addition, steel plate shear force wall decreases the operation of formwork, saves the time of concrete coagulation, substantially reduces the duration, accelerate speed of application.But in actual applications, in order to give full play to the performance of steel plate, guarantee hysteretic loop is full, pure shear yield failure is there is when enabling steel plate shear force wall stressed, usual needs arrange enough horizontal and vertical stiffening ribs in steel plate shear force wall both sides, to ensure that steel plate, before surrender, complete buckling and cripling does not occur, the complexity this considerably increases steel plate shear force wall design, manufacturing and construct; In addition, the fire resistance of steel plate shear force wall is also relatively poor, needs extra fire prevention measure, which increases cost.
In this case, steel plate concrete combined shear wall is just shown one's talent with the advantage of himself.Combined steel plate shearing force wall can make up the shortcoming of reinforced concrete shear wall ductility difference and the easy flexing of steel plate shear force wall, gets the length of bi-material, the demand of satisfied building, structure-function integration and structural performance target multiple demands.As can be seen here, compound wall has broad application prospects.
The lateral resistant member that combined steel plate shearing force wall is made up of steel plate and concrete slab, similar to steel plate shear force wall, combined steel plate wall is often large than the reinforced concrete shear wall shear stiffness of identical shear-carrying capacity, and its thickness and weight reduce all to some extent, can usage space be saved, and reduce the expense on basis and reduce geological process.The proposition of compound wall is intended to utilize that steel plate bearing capacity is high, ductility good, quick construction and concrete slab rigidity is large, fire resistance is good advantage, and bi-material is learnt from other's strong points to offset one's weaknesses, and forms a kind of combination property preferably component form.Moreover, compared with having benefited from the oblique pull field-effect after flexing with thin steel plate shear wall, compound wall can obtain following income by suppressing steel plate flexing: significantly improve its shear-carrying capacity; By appropriate design can avoid steel plate and concrete impaired in little, middle earthquake, thus the maintenance cost after little, middle earthquake can be removed from; Can avoid the huge noise that flexing is brought, and this noise often becomes a large obstacle of steel plate shear force wall engineer applied.
The new type of component that profiled steel sheet concrete combined shear wall is made up of profiled sheet and concrete central layer.The use of profiled sheet ~ combined concrete shear wall is intended to utilize that steel plate bearing capacity is high, ductility good, quick construction and concrete slab rigidity is large, fire resistance is good advantage, and bi-material is learnt from other's strong points to offset one's weaknesses, and forms a kind of performance preferably component form.But in current research, find that the advantage of profiled sheet is not given full play to.In assembled wall board, panel adopts thin-walled steel plate, and due to thinner thickness, its local stability supporting capacity is not high, therefore needs the constraint arranging connector or other measure reinforced panel, prevents it from plane external drum occurring bent.
Summary of the invention
For above-mentioned defect, technical problem to be solved by this invention is, a kind of outer multi-cavity profiled sheet concrete filled compound shear wall is provided, while ensureing that compound wall has higher Compressive Bearing Capacity, improve its deformability, and simplify the structure of shear connector, improve stock utilization.
The technical scheme that the present invention solves the employing of its technical problem is as follows: a kind of outer multi-cavity profiled sheet concrete filled compound shear wall, it by Concrete Filled in two pieces of profiled sheets be oppositely arranged, in this compound shear wall, interval is welded with polylith and the isometric steel sheet of this compound shear wall, the two ends of profiled sheet are welded with steel column respectively, make this compound shear wall form the structure of border seal; Described profiled sheet is waveform, and steel sheet is equidistantly welding;
Ingredients weight parts in described concrete is: cement 350 ~ 400 parts, coarse aggregate 1150 ~ 1170 parts, 140 ~ 150 parts, water, 65 ~ 70 parts, flyash, silicon ash 40 ~ 50 parts, high-performance water reducing agent 7.5 ~ 9.5 parts, crude fibre 0.1 ~ 0.2 part, nanofiber 0.1 ~ 0.2 part, nano silicon 15 ~ 20 parts, porous fines 150 ~ 180 parts, non-porous fines 300 ~ 320 parts, water-absorbing resin 0.5 ~ 1 part, polymer emulsion 10 ~ 20 parts, aluminum stearate 2 ~ 3 parts, dihydrate gypsum 5 ~ 8 parts, 1-hydroxy cyclohexyl phenylketone 0.6 ~ 2.4 part, ature of coal charcoal 5 ~ 12 parts, silane coupler 1 ~ 1.3 part, non-hydrate sodium metasilicate 1.2 ~ 2.0 parts, sodium potassium tartrate tetrahydrate 0.85 ~ 1.25 part,
Described crude fibre is the shape after the spiral torsion vertically of polygonal prism, length is 35mm ~ 55mm, the diameter in cross section or equivalent diameter are 0.5 ~ 1.0mm, surface between adjacent rib is indent, described coarse-fibred rib is wide is 5 ~ 15% of crude fibre cross section circumradius, and this coarse-fibred raw materials is selected from polyethylene, polypropylene, polyvinyl alcohol, polyester, polyamide, polymethyl methacrylate, polyformaldehyde, Merlon and their homopolymers thereof, copolymer and filling-modified thing.
Further, described compound shear wall bears vertical load by affined concrete, described compound shear wall be welded with girder steel up and down.
Further, described steel sheet is batten plate, serves as the effect of stiffening rib and connector, can bear transverse shearing force effect.
Further, described compound shear wall can embed in other combining structure, and combining form is various, applied range.
Further, described porous fines be selected from haydites of book structure, lytag and leca any one or a few, the particle diameter of described porous fines is 0.5 ~ 2mm, porous fines density is little, light weight, can insulation, heat insulation, water absorption rate is low, not only fire-resistant, anti-seismic performance good, and anti-freezing property and endurance quality also fine.
Further, described non-porous fines be selected from river sand, Machine-made Sand and mountain sand any one or a few, mud content is less than 1.5%; Described coarse aggregate be selected from cobble and rubble any one or its combination, particle diameter is 10 ~ 15mm, and crush index is 2.5% ~ 3%, and in coarse aggregate, flat-elongated particles content is 3% ~ 5%; The fineness modulus of described non-porous fines is 2.5 ~ 3.0.
Further, described cement selection 42.5 grades of portland cements, described flyash selects high-quality I level flyash, and described silicon ash requires SiO
2content is between 94% ~ 95%, and the water-reducing rate of described high-performance water reducing agent is 35% ~ 45%, and the average grain diameter 11 ~ 14nm of described nano silicon, impurity content is less than 0.1%.
Beneficial effect of the present invention:
1. in the middle of two panels profiled sheet, welding steel sheet serves as the effect of stiffening rib and connector.Closed profiled sheet has stronger effect of contraction to concrete, and the existence of stiffening rib simultaneously improves the stability bearing capacity of profiled sheet.While ensureing that compound wall has higher Compressive Bearing Capacity, improve its deformability.And simplify the structure of shear connector, improve stock utilization.
2. the concrete material adopted improves the interface performance of fiber ~ base material, avoids using chemical modification means, and technological process has and facilitates feasible advantage.
3. carry out the pull-out resistance of increased fiber under load-up condition by screw type crest line (4), and carried out the contact area of increased fiber and matrix by the inner concave between crest line, thus play coarse-fibred activeness and quietness effect better.
4. by nanofiber and nano silicon and other materials Application of composite in concrete material, will significantly promote concrete mechanical property and durability, there is great engineering practical value and significant Technological Economy meaning.
5. outer multi-cavity profiled sheet concrete filled compound shear wall of the present invention eliminates existing profiled sheet compound wall shortcoming, improve the ductility of structure, this kind of compound wall is a kind of glissando in essence, while absorption seismic energy input, compound wall is allowed to surrender prior to post, plastic strain being limited in compound wall, thus ensure that the safety of superstructure, is the design concept of a kind of advanced person; It can damping effectively, and has stably hysteretic energy performance, while avoiding superstructure and foundation failure, effectively reduces the cost of superstructure and infrastructure.
Accompanying drawing explanation
Fig. 1 is structure sectional view of the present invention;
Fig. 2 is overall schematic of the present invention.
Wherein, 1-compound shear wall, 2-steel sheet, 3-concrete, 4-profiled sheet, 5-steel column, 6-girder steel.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
The office premises in city of Hebei province, core texture is intended adopting outer multi-cavity profiled sheet concrete filled compound shear wall of the present invention, wall thickness 2m, the long 11m of wall.This outer multi-cavity profiled sheet concrete filled compound shear wall 1, it is filled in two pieces of profiled sheets be oppositely arranged 4 by concrete 3, in this compound shear wall 1, interval is welded with polylith and the isometric steel sheet 2 of this compound shear wall, the two ends of profiled sheet 4 are welded with steel column 5 respectively, make this compound shear wall 1 form the structure of border seal, described profiled sheet 4 is waveform, and steel sheet 2 is equidistantly welding, ingredients weight parts in described concrete 3 is: cement 350 ~ 400 parts, coarse aggregate 1150 ~ 1170 parts, 140 ~ 150 parts, water, 65 ~ 70 parts, flyash, silicon ash 40 ~ 50 parts, high-performance water reducing agent 7.5 ~ 9.5 parts, crude fibre 0.1 ~ 0.2 part, nanofiber 0.1 ~ 0.2 part, nano silicon 15 ~ 20 parts, porous fines 150 ~ 180 parts, non-porous fines 300 ~ 320 parts, water-absorbing resin 0.5 ~ 1 part, polymer emulsion 10 ~ 20 parts, aluminum stearate 2 ~ 3 parts, dihydrate gypsum 5 ~ 8 parts, 1-hydroxy cyclohexyl phenylketone 0.6 ~ 2.4 part, ature of coal charcoal 5 ~ 12 parts, silane coupler 1 ~ 1.3 part, non-hydrate sodium metasilicate 1.2 ~ 2.0 parts, sodium potassium tartrate tetrahydrate 0.85 ~ 1.25 part, described crude fibre is the shape after the spiral torsion vertically of polygonal prism, length is 35mm ~ 55mm, the diameter in cross section or equivalent diameter are 0.5 ~ 1.0mm, surface between adjacent rib is indent, described coarse-fibred rib is wide is 5 ~ 15% of crude fibre cross section circumradius, and this coarse-fibred raw materials is selected from polyethylene, polypropylene, polyvinyl alcohol, polyester, polyamide, polymethyl methacrylate, polyformaldehyde, Merlon and their homopolymers thereof, copolymer and filling-modified thing.
Wherein, have affined concrete 3 to bear vertical load in described compound shear wall 1, about 1 of described compound shear wall is welded with girder steel 6; Described steel sheet 2 is batten plate, serves as the effect of stiffening rib and connector, can bear transverse shearing force effect; Described compound shear wall 1 can embed in other combining structure, and combining form is various, applied range; Porous fines be selected from haydites of book structure, lytag and leca any one or a few, the particle diameter of described porous fines is 0.5 ~ 2mm, porous fines density is little, light weight, can insulation, heat insulation, water absorption rate is low, not only fire-resistant, anti-seismic performance good, and anti-freezing property and endurance quality also fine; Described non-porous fines be selected from river sand, Machine-made Sand and mountain sand any one or a few, mud content is less than 1.5%; Described coarse aggregate be selected from cobble and rubble any one or its combination, particle diameter is 10 ~ 15mm, and crush index is 2.5% ~ 3%, and in coarse aggregate, flat-elongated particles content is 3% ~ 5%; The fineness modulus of described non-porous fines is 2.5 ~ 3.0; Described cement selection 42.5 grades of portland cements, described flyash selects high-quality I level flyash, and described silicon ash requires that SiO2 content is between 94% ~ 95%, and the water-reducing rate of high-performance water reducing agent is 35% ~ 45%, the average grain diameter of nano silicon is 11 ~ 14nm, and impurity content is less than 0.1%.
Described nanofiber obtains by following methods:
1) selection of nano titanium oxide and modification; Nano titanium oxide be rutile-type with Detitanium-ore-type by 30: 50 part by weight mix mutually; The particle diameter of nano titanium oxide, between 10 ~ 20 nanometers, is heat-treated nano titanium oxide powder, at 450 ~ 500 DEG C, calcine 1.5h, adds nonmetallic ion N modifying titanium dioxide, obtains modified nano-titanium dioxide powder;
2) dispersion of nano titanium oxide; First, the modified nano-titanium dioxide after heat treatment, using zirconia ball as abrasive media, carries out one-level dispersion by ball milling, obtains nano titania slurry;
3) titania slurry after ball milling is carried out hyperthermia drying, obtain modified nano-titanium dioxide photochemical catalyst powder;
4) adopt ball-milling method to carry out twice dispersing in 0.5 ~ 1% dispersant dried modified nano-titanium dioxide photochemical catalyst powder, mass percent, nano titanium oxide is uniformly distributed, obtains nanofiber.
Compound wall elasto-Plastic Finite Element Simulation is analyzed and researched:
May there is flexing at whole loading process light plate in profiled sheet compound wall, thus be separated with concrete, and the accurate simulation of this problem determines the accuracy of Finite element analysis results to a great extent.
The present invention intends adopting general finite element analysis software ANSYSV10 modeling analysis, the non-linear force performance for the complexity of accurate simulation compound wall: concrete is intended all adopting SOLID65 3D solid unit; Profiled sheet adopts SHELL181 unit; Shear connector adopts eight node hexahedral element SOLID45 modeling analysis.Each contact surface between steel plate and concrete adopts osculating element CONTA173 to simulate.
Bearing capacity simplified calculation method about compound wall is studied:
Elasto-plastic time history analysis is carried out to die mould steel combined shear wall construction, in order to the hysteretic rule of body of wall under elastoplasticity duty can be simulated, and can be applied in computer program, need to choose a kind of simple and easy to do wall model of element to simulate the Hysteresis Behavior that body of wall enters plasticity working stage, set up compound wall bearing capacity simplified calculation method and choose resilience model.Intend quoting a kind of macroscopical wall unit that can carry out compound wall elasto-plastic time history analysis, and analyze the service behaviour of each assembly of composition wall unit, by the incompatible Mathematical Modeling model setting up the hesteresis curve of each assembly in wall unit of test intended; And contrast with the result that Finite element analysis results, result of the test and employing Hossain method calculate, verify the correctness of this method for simplifying and improved.
The present invention's welding steel sheet in the middle of two panels profiled sheet serves as the effect of stiffening rib and connector.Closed profiled sheet has stronger effect of contraction to concrete, and the existence of stiffening rib simultaneously improves the stability bearing capacity of profiled sheet.While ensureing that compound wall has higher Compressive Bearing Capacity, improve its deformability.And simplify the structure of shear connector, improve stock utilization.The concrete material adopted improves the interface performance of fiber ~ base material, avoids using chemical modification means, and technological process has and facilitates feasible advantage.Carry out the pull-out resistance of increased fiber under load-up condition by screw type crest line, and carried out the contact area of increased fiber and matrix by the inner concave between crest line, thus play coarse-fibred activeness and quietness effect better.
By nanofiber and nano silicon and other materials Application of composite in concrete material, will significantly promote concrete mechanical property and durability, there is great engineering practical value and significant Technological Economy meaning.Outer multi-cavity profiled sheet concrete filled compound shear wall of the present invention eliminates existing profiled sheet compound wall shortcoming, improve the ductility of structure, this kind of compound wall is a kind of glissando in essence, while absorption seismic energy input, compound wall is allowed to surrender prior to post, plastic strain being limited in compound wall, thus ensure that the safety of superstructure, is the design concept of a kind of advanced person; It can damping effectively, and has stably hysteretic energy performance, while avoiding superstructure and foundation failure, effectively reduces the cost of superstructure and infrastructure.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to the present invention, every according in technical spirit of the present invention to any simple modification, equivalent variations that above embodiment is done, all fall within protection scope of the present invention.
Claims (7)
1. an outer multi-cavity profiled sheet concrete filled compound shear wall, it is filled in two pieces of profiled sheets be oppositely arranged (4) by concrete (3), it is characterized in that: interval is welded with polylith and the isometric steel sheet (2) of this compound shear wall (1) in this compound shear wall (1), the two ends of profiled sheet (4) are welded with steel column (5) respectively, make this compound shear wall (1) form the structure of border seal; Described profiled sheet (4) is waveform, and steel sheet (2) is equidistantly welding;
Described concrete (3) is grouped into by the one-tenth of following weight portion: cement 350 ~ 400 parts, coarse aggregate 1150 ~ 1170 parts, 140 ~ 150 parts, water, 65 ~ 70 parts, flyash, silicon ash 40 ~ 50 parts, high-performance water reducing agent 7.5 ~ 9.5 parts, crude fibre 0.1 ~ 0.2 part, nanofiber 0.1 ~ 0.2 part, nano silicon 15 ~ 20 parts, porous fines 150 ~ 180 parts, non-porous fines 300 ~ 320 parts, water-absorbing resin 0.5 ~ 1 part, polymer emulsion 10 ~ 20 parts, aluminum stearate 2 ~ 3 parts, dihydrate gypsum 5 ~ 8 parts, 1-hydroxy cyclohexyl phenylketone 0.6 ~ 2.4 part, ature of coal charcoal 5 ~ 12 parts, silane coupler 1 ~ 1.3 part, non-hydrate sodium metasilicate 1.2 ~ 2.0 parts, sodium potassium tartrate tetrahydrate 0.85 ~ 1.25 part,
Described crude fibre is the shape after the spiral torsion vertically of polygonal prism, length is 35mm ~ 55mm, diameter of section or equivalent diameter are 0.5 ~ 1.0mm, surface between adjacent rib is indent, described coarse-fibred rib is wide is 5 ~ 15% of crude fibre cross section circumradius, and this coarse-fibred raw materials is selected from polyethylene, polypropylene, polyvinyl alcohol, polyester, polyamide, polymethyl methacrylate, polyformaldehyde, Merlon or their homopolymers, copolymer and filling-modified thing.
2. outer multi-cavity profiled sheet concrete filled compound shear wall according to claim 1, it is characterized in that: described compound shear wall (1) bears vertical load by affined concrete (3), described compound shear wall (1) be welded with girder steel (6) up and down.
3. outer multi-cavity profiled sheet concrete filled compound shear wall according to claim 1 and 2, is characterized in that: described steel sheet (2) is batten plate.
4. outer multi-cavity profiled sheet concrete filled compound shear wall according to claim 1, is characterized in that: described compound shear wall (1) can embed in other combining structure.
5. outer multi-cavity profiled sheet concrete filled compound shear wall according to claim 1, it is characterized in that: described porous fines be selected from haydites of book structure, lytag and leca any one or a few, the particle diameter of described porous fines is 0.5 ~ 2mm.
6. outer multi-cavity profiled sheet concrete filled compound shear wall according to claim 1, is characterized in that: described non-porous fines is selected from one or more in river sand, Machine-made Sand and mountain sand, and mud content is less than 1.5%; Described coarse aggregate be selected from cobble or rubble any one or its combination, particle diameter is 10 ~ 15mm, and crush index is 2.5% ~ 3%, and in coarse aggregate, flat-elongated particles content is 3% ~ 5%; The fineness modulus of described non-porous fines is 2.5 ~ 3.0.
7. outer multi-cavity profiled sheet concrete filled compound shear wall according to claim 1, it is characterized in that: described cement selection 42.5 grades of portland cements, described flyash selects high-quality I level flyash, and described silicon ash requires SiO
2content is between 94% ~ 95%, and the water-reducing rate of high-performance water reducing agent is 35% ~ 45%, and the average grain diameter of nano silicon is 11 ~ 14nm, and impurity content is less than 0.1%.
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| CN105155732B (en) | 2017-10-17 |
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