277results about How to "Improve the bending capacity" patented technology

The invention discloses a horizontal splicing corrugated steel web plate combined box girder comprising a combined box girder formed by horizontally splicing multiple precast I-shaped girder units (1); and a top plate lower edge steel plate (2-1) and a bottom plate lower edge steel plate (3-1) are respectively connected to the lower end faces of a top plate wet jointing seam (2) and a bottom plate wet jointing seam (3) of two adjacent precast I-shaped girder units (1). The construction method comprises the steps of mounting the multiple precast I-shaped girder units onto a bridge pier abutment, fixing the top plate lower edge steel plates connected with shearing force nails to the top plate wet jointing seams of every two adjacent precast I-shaped girder units, and pouring top plate wet jointing seam concrete (2-3) by taking the top plate lower edge steel plates as support templates; and then fixing the bottom plate lower edge steel plates connected with the shearing force nails to the bottom plate wet jointing seams of every two adjacent precast I-shaped girder units, and pouring bottom plate wet jointing seam concrete (3-3) by taking the bottom plate lower edge steel plates as the support templates. The horizontal splicing corrugated steel web plate combined box girder and the construction method achieve the aims of simplifying the operation process, reducing work amount, shortening construction period, reducing weight and ensuring construction quality.

The invention provides a deep mixing pile-micro pre-stressed steel pipe concrete pile-vertical anchor rod composite foundation pit support method. The method comprises the following steps: (1) constructing the deep mixing pile; (2) grouting at an anchoring end; and (3) forming the micro pre-stressed steel pipe concrete pile. The method has the advantages that as the deep mixing pile is equipped with the micro pre-stressed steel pipe pile and an anchor rod or an anchor rope, the bending and shearing bearing capacity thereof is improved; the antidumping and anti-slip capability of the wall body of the mixing pile is improved under the condition of not exceeding a land red line; and meanwhile the combined support method has the advantages of short construction period, low noise, no pollution and no soil squeezing and is very beneficial to environmental protection during the construction process, thus being a novel combined support member and a method which are worth to be popularized and applied.

The invention discloses a sleeve reinforced concrete column. The sleeve reinforced concrete column is characterized in that: a sleeve (1) of a reinforced concrete column (2) is a prefabricated active powder concrete sleeve. The sleeve reinforced concrete column has the advantages of convenience for construction, low cost, high axial bearing capacity, good shock resistance, predominant fireproof performance, excellent durability and the like, meanwhile, saves more resources and energy, and accords with the requirements of sustainable development.

The invention relates to a concrete-filled steel tube combined shear wall and a construction process thereof. The shear wall comprises steel tubes which are distributed uniformly along the section of the shear wall, concrete filled into the steel tubes, concrete poured outside the steel tubes, square stirrups arranged outside the steel tubes, and vertically-distributed steel bars and horizontally-distributed steel bars which are arranged on front and rear sides of the steel tubes, tie steel bars which are tied between the steel tubes and the vertically-distributed steel bars and between the steel tubes and the horizontally-distributed steel bars, and longitudinal steel bars which are arranged at the positions of restraint members on edges of two sides of the steel bars. According to the concrete-filled steel tube combined shear wall, the steel tubes are embedded into the ordinary reinforced concrete shear wall, and the bearing capacity of the concrete is improved under the restraint action of the steel tubes, so that the sectional dimensions of the members are reduced, the dead weight of a structure is reduced, a seismic effect is reduced, and more usable areas are provided for buildings under the condition of the same design axial force; and anti-seismic properties of the flexural capacity, shear capacity, damage ductility and the like of the shear force are improved effectively by utilizing the high bearing capacity and high ductility of the concrete-filled steel tubes.

The invention aims at providing a fiber reinforce plastic (FRP) reinforced concrete-filled steel tube combination column which comprises a steel tube, a hoop rib, an FRP reinforced rib and a longitudinal reinforcement, wherein the hoop rib and the FRP reinforced rib are arranged in the steel tube; the inner wall of the steel tube is provided with fixed angle iron; the end part of the FRP reinforced rib is fixed on the angle iron; the FRP reinforced rib is provided with a hole, and the hoop rib passes through the hole in the FRP reinforced rib; the longitudinal reinforcement is fixed on the hoop rib; the steel tube is filled with concrete. An FRP reinforced rib plate internally provided with the hoop rib and the longitudinal reinforcement is arranged in the FRP reinforced concrete-filled steel tube combination column, and the concrete can be separated again, so that the restraint effect of the concrete is improved, the bearing capacity of the concrete is improved, and the tube wall on the stressed side is effectively prevented from being bended. By adopting a structure of enabling reinforced concrete, the FRP reinforced rib and the steel tube to cooperative work, the FRP reinforced concrete-filled steel tube combination column is simple in structure and convenient to construct, and has the characteristics of being light in weight, high in carrying capacity and good in ductility and shock resistance.

The invention discloses a U-shaped steel-concrete composite beam, relates to a composite beam, and solves the problems that the conventional I-shaped steel-concrete composite beam has poor fire resistance and poor overall stability, an outsourcing steel-concrete laminated plate composite beam has low anti-shear bearing capacity, the complete cooperative work of a steel beam and concrete is not guaranteed easily. The U-shaped steel-concrete composite beam comprises a concrete plate, U-shaped steel, a plurality of pieces of angle steel, a plurality of longitudinal stress reinforcing steel bars, a plurality of erect reinforcing steel bars and the concrete; each web plate of the U-shaped steel is fixedly connected with a flange plate which is arranged horizontally; the U-shaped steel and the flange plate are integrated; the plurality of pieces of angle steel are fixedly connected in the U-shaped steel along the length direction of the U-shaped steel; an erect reinforcing steel bar is welded on the side surface of each piece of angle steel; the longitudinal stress reinforcing steel bars are fixedly connected with the corresponding erect reinforcing steel bars along the length direction of the U-shaped steel; the concrete plate is arranged on the top of the U-shaped steel; the reinforcing steel bars in the concrete plate are bent and then extend into the U-shaped steel; the concrete is cast in the U-shaped steel. The U-shaped steel-concrete composite beam is applied to civil engineering construction.

The invention discloses a novel combined stone beam. The stone beam comprises a stone beam body, wherein a tensile region of the stone beam body is provided with a groove in the longitudinal direction of the stone beam body; a reinforcement material under a certain horizontal prestressing force is arranged in the groove in the longitudinal direction; the reinforcement material is fixed in the groove in a bonding way through a bonding material; and both ends of the reinforcement material are firmly fixed on both longitudinal ends of the stone beam body respectively through anchor devices. Compared with the prior art, the combined stone beam substantially increases the cracking moment, bending rigidity and anti-bending bearing capacity of the stone beam by embedding the high-strength tensile reinforcement material in the tensile region of the stone beam body and applying prestressing force and anchoring. Moreover, the combined stone beam can be applied in a beam-type stone-structure member of larger span and has the advantages of great width, high bearing capacity, no damages to stone-structure style and features and beauty, and the like; and therefore, the combined stone beam can be used in a newly-built stone-structure project and the reinforcement of an existing stone structure.

The invention discloses a prefabricated building main body structure, and relates to the technical field of constructional engineering structures. The prefabricated building main body structure comprises an independent foundation; at least one layer of floor slabs is fixedly arranged above the independent foundation; a supporting structure is arranged under each layer of the floor slabs; a roof frame structure is fixedly arranged above the top layer of the floor slabs; the floor slabs comprise a plurality of combination beam plates; the supporting structure of each layer comprises a plurality of square pipe columns; tenon pipes connected with the combination beam plates in an inserting manner are arranged on the square pipe columns; a stairway is arranged between every two vertically adjacent layers of floor slabs; the combination beam plates comprise four-corner components; steel beams are fixedly connected between the adjacent four-corner components; the upper edges of the steel beams are spaced from the top ends of the four-corner components by a certain distance; concrete slabs are poured on the steel beams; reinforcement meshes are arranged in the concrete slabs; reserved pipeline holes are formed in the side surfaces of the steel beams; and the four-corner components are sleeves matched with the tenon pipes in an inserting manner. The beam and column connection is reasonable, the mounting is convenient and the flexural capacity is high.

An energy dissipation, shock absorption and anti-liquefaction rigid and flexible slide-resistant pile and a construction method belong to the slope supporting technology field. The energy dissipation, shock absorption and anti-liquefaction rigid and flexible slide-resistant pile is composed of a hollow tubular pile, broken stones, anchor cables and air cushions, wherein the hollow tubular pile comprises first-type hollow tubular piles and second-type hollow tubular piles, which are all prefabricated with reinforcement concrete; crossed plates are embedded in an external barrel; water permeating holes are formed in the external barrel in a plum blossom shape; anchor cables penetrate through the hollow tubular piles and the air cushions are covered at the outer side; one first-type hollow tubular pile and many second-type hollow tubular piles are arranged in sequence in the pile holes of a slope body; the tops and the bottoms of the hollow tubular piles are embedded with one another; the hollow tubular pile is filled with the broken stones and a cover plate is arranged on the top; the anchor cables are anchored on the bottom plate and the cover plate through an anchorage device and the air cushions are full of gas. The slide-resistant pile is prefabricated, assembled and formed to be a rigid and flexible body, has high load-bearing capacity, plays a role in well dissipating energy under earthquake condition, has good drainage capacity and prevents soil around the pile from being liquefied; the construction method is simple and quick and the engineering cost is low.

The invention discloses an assembly type main structure of a building, and relates to the technical field of building engineering structures. The assembly type main structure of the building comprises isolated foundations, at least one layer of supporting beam group and at least one layer of cold-formed thin-walled steel composite beam plates are arranged on the isolated foundations, and a roof frame structure is arranged on the top supporting beam group, wherein each layer of supporting beam group comprises a plurality of square tubular columns, and the upper portion of each square tubular column is provided with a beam support; each cold-formed thin-walled steel composite beam plate comprises a lipped channel stiffened structural beam, a profiled steel sheet, a reinforcing mesh and a concrete plate, and the end of each lipped channel stiffened structural beam is provided with a sleeve; each lipped channel stiffened structural beam comprises a vertical plate, a first transverse plate and a second transverse plate, a vertical baffle is arranged above each first transverse plate, and stiffened structures are arranged on the first transverse plates, the second transverse plates, the vertical plates and the vertical baffles respectively. The assembly type main structure is reasonable in beam-column connection, convenient to install, high in flexural capacity and suitable for large-span commercial complex buildings.

The invention provides a splicing structure and a splicing method of prefabricated bridge piers and a prefabricated bearing platform. By utilizing the joggling of hollow steel tubes in first concave grooves in the bottoms of the prefabricated bridge piers and concrete filled steel tube tenons enclosed by the inner walls of annular grooves in the top of the prefabricated bearing platform, on one hand, favorable positioning effects are achieved for the mounting, on the bearing platform, of the prefabricated bridge piers, and on the other hand, the shear capacity and the flexural capacity at splicing positions are improved; post-poured concrete is poured into the annular grooves to enwrap the splicing positions of the prefabricated bridge piers and the prefabricated bearing platform; the prefabricated bridge piers and the prefabricated bearing platform are connected into a whole; an overall stress structure is ameliorated; the splicing strength of the prefabricated bride piers and the prefabricated bearing platform is greatly improved, and is not less than the strength of a cast-in-place bridge pier. By adopting a way of splicing the prefabricated bride piers and the prefabricated bearing platform, the field pouring workload of concrete is effectively reduced; the field operation is facilitated; a road is not occupied; influences on an urban traffic environment during the operation are effectively relieved, and meanwhile, a construction period of a bridge is shortened.

Steel pipe concrete beam-column joints connecting structure, and it aims at improving the shear and flexural strength of beam-column joints and ensuring the steel plate and node work together. The cross section of steel pipe 4 in steel pipe concrete column is rectangular, the steel beam 31, 32, 33, 34, 35 in beam and the reinforcing bar 11, 12, 13, 14, 15 cross through the rectangular hole h3-1, h3-2, h3-3, h3-4, h3-5 and round hole h1, h2, h3, h4, h5 separately, two ends of the steel plate 31, 32, 33, 34, 35 are opened 8-16 semi-circle holes separately.

The invention discloses a method for calculating the flexural capacity of a variable cross-section column. The method comprises the following steps: S1, calculating and determining a hoop coefficienttheta of a component; and S2, substituting the parameters into a formula to solve the ultimate flexural capacity. The influence of the corrugated plates, the area conversion of the irregular concretesection, the enhancement of the structural constraint effect and other factors are considered, the steel pipe, the corrugated plates and the concrete can be synergistically stressed under the pure bending load, the overall working performance of the combined column is good, and the deflection and cracks of the combined column can be effectively controlled; and the influence of the concrete strength grade on the flexural capacity of the component under the pure bending load is small. The mean value of the ratio of the crustacean column flexural capacity obtained through a calculation formula tothe ultimate bending moment obtained through finite element analysis is 0.999, the variance is 0.009, and the flexural capacity of the crustacean column can be accurately calculated.

The invention discloses a manufacturing method of an internally arranged thin-wall H-shaped steel and wood composite beam. The manufacturing method comprises the steps that epoxy resin adhesives are brushed on the two sides of a thin-wall H-shaped steel web and the inner sides of web wood plates, the thin-wall H-shaped steel web and the web wood plates are bonded and connected through web connecting bolts, and then thin-wall H-shaped steel and webs on the two sides are closely pasted through pre-tightening opposite-pulling devices; epoxy resin adhesives are brushed on the surfaces of thin-wallH-shaped steel flanges and the inner sides of flange wood plates, the thin-wall H-shaped steel flanges and the flange wood plates are bonded and connected through flange shear-resistant connecting toggle pins, and then the thin-wall H-shaped steel and the flange wood plates are closely pasted through the pre-tightening opposite-pulling devices; and finally, the internally arranged thin-wall H-shaped steel and wood composite beam is formed. According to the manufacturing method of the internally arranged thin-wall H-shaped steel and wood composite beam, efficient steel and wood compositing canbe achieved, the steel and wood composite beam with more excellent properties of bearing capacity, rigidity, durability and the like is formed, and industrial production and standardized constructionof the steel and wood composite beam in a steel and wood composite structure are facilitated.

The invention provides a connecting joint of a prefabricated steel pipe restraining reinforced concrete pier and a bearing platform and a construction method thereof. The connecting joint connects a prefabricated bridge pier and a bearing platform. The prefabricated bridge pier includes a steel pipe joint, an upper steel pipe and concrete. The steel pipe joint includes a lower steel pipe, a perforated steel plate and a connecting steel plate. The upper steel pipe is arranged above the lower steel pipe. The construction method of the connecting joint includes manufacturing a steel pipe joint, arranging longitudinal steel bars, pouring bridge pier concrete, hoisting a prefabricated pier and pouring filling concrete and the like. The connecting joint simplifies the formwork process. The construction speed is fast. The construction quality is improved. The construction environment is improved. The labor cost and the construction cost are saved. The bearing capacity of the connecting jointof the prefabricated pier and the bearing platform is improved on the basis of ensuring that the outer-wrapped steel pipe does not bear vertical load and greater lateral binding force on the core concrete is provided.

The invention provides a joint shape design method for realizing equal bending bearing of low-match butt-joint joint with base metal and relates to a butt-joint joint design method. The method comprises the following steps that 1, the yield strength matching ratio of a low-match joint is calculated; 2, the height h of the welding seam surplus height is obtained through calculation by a material mechanical formula according to the equal bending bearing condition; 3, the cover surface weld pass half width w is determined; 4, the weld toe radius r is determined; and 5, the low-match joint geometrical shape parameter required by the equal bending bearing is obtained according to the solved height h of the welding seam surplus height, the cover surface weld pass half width w and the weld toe radius r. The joint shape design method is suitable for the low-match flat plate butt-joint joint of the X-shaped grooved double-side welding. The high-intensity welding structure can adopt the low-match joint assembly mode. The high-intensity welding adopts the low-match welding joint, the bending bearing capability can be enabled to be not lower than that of the base metal, and in addition, the ductility and toughness and the like are obviously improved through being compared with those of a matched welding joint.

The invention discloses a steel structure reinforcing joint part with multiple anti-seismic progressive-collapse-resisting defensive lines. The steel structure reinforcing joint part comprises a steelbeam, a steel column, a steel groove and truss chord members. The end of the steel beam is fixed to the steel column, the steel groove is fixed to the lower surface of a bottom flange of the steel beam, the side face of the steel column is provided with hinge supports, friction sliding blocks are arranged in the steel groove, through holes are formed in the bottom face of the steel groove, one ends of the truss chord members penetrate through the through holes to be connected with the friction sliding blocks, and the other ends of the truss chord members are connected with the hinge supports.According to the part, the problem that a traditional steel structure joint is poor in anti-seismic progressive-collapse-resisting capacity, and the structure is in brittle failure can be effectivelysolved.

The invention provides an anti-seismic tubular pile production method and aims at solving the problems of poor flexural performance, fragile-form damage, low anti-seismic performance and limited application existing in the prior art. The anti-seismic tubular pile production method comprises the steps of reinforcement cage manufacturing, end plate installation, concrete manufacturing and casting, prestressed steel bar tensioning, centrifugal tubular pile shaping, tubular pile maintenance, tensioning and arrangement of prestressed steel bars and naming and marking of tubular pile products. The anti-seismic tubular pile production method has the advantages that the ductility and flexural bearing capacity of anti-seismic tubular piles produced by means of the anti-seismic tubular pile production method are improved, the anti-seismic tubular piles have good adaptability to geological conditions, pile bodies are high in concrete strength, compact and beating-resistant, and the anti-seismic tubular piles have stronger penetrability, have better adaptability to the geological condition of large bearing stratum fluctuation change and are suitable for regions having higher requirements for the horizontal bearing capacity of the tubular piles.

The present invention relates to a laminate including a coating layer, which includes an Si—O group-containing material and an intermediate interface layer, and to a method for producing the same, and more specifically, to a laminate which includes an intermediate interface layer, which is a mixture of materials constituting a substrate and materials constituting a coating layer, between the substrate and the coating layer, which includes an Si—O group-containing material, and thus can significantly improve bending capabilities, transparency, and adhesion between the substrate and the coating layer, and further enhances scratch resistance, water repellent properties, anti-fouling properties, fingerprint resistance, thermal stability, gloss properties, and surface hardness by a silsesquioxane coating, and a method for producing the laminate.