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189results about How to "Increased bending stiffness" patented technology

Hollow interlayer pipe wall compound steel pipe concrete wind power tower with ribs

The invention discloses a hollow interlayer pipe wall compound steel pipe concrete wind power tower with ribs. The tower comprises a cast-in-place reinforced concrete foundation and a steel pipe concrete tower section set. Steel pipe concrete tower sections are connected through horizontal flange discs to form a vertical tower cylinder, meanwhile, the bottom of the tower cylinder is fixed on the cast-in-place reinforced concrete foundation, the steel pipe concrete tower sections comprise inner steel pipes, outer steel pipes and concrete layers cast in the interlayers between the inner steel pipes and the outer steel pipes, first reinforced ribs are arranged on the peripheries of the outer walls of the inner steel pipes, and second reinforced ribs are arranged on the peripheries of the inner walls of the outer steel pipes. Compared with an existing steel tower, the compound steel pipe concrete structure with a hollow interlayer and with the pipe walls provided with the ribs is used, the reinforced ribs are arranged on the pipe wall sides where the inner steel pipes and the outer steel pipes are in contact with concrete, the interface binding force of the steel pipes and the concrete is enhanced, the bearing capacity and the ductility of the tower are improved, and early local buckling damage of the thin-wall steel pipes can be avoided or delayed.
Owner:HOHAI UNIV

Structure and manufacturing process of low-cost carbon fiber composite material sky railway train body

The invention discloses a structure and a manufacturing process of a low-cost carbon fiber composite material sky railway train body, and belongs to the technical field of application of composite materials on rail vehicles. The structure comprises a train body side wall, wherein end walls are assembled and connected to the both ends of the train body side wall; a top frame and a bottom frame arecorrespondingly assembled and connected to the inner top surface and the inner bottom surface of the train body side wall, a ceiling is assembled and connected to the outer top surface of the train body side wall, and a bogie mounting hole is formed in the ceiling; the train body side wall and the end walls both comprise reinforced rib frames, inner skins and outer skins, and grids of the reinforcing rib frames are filled with sandwich foam blocks; the ceiling comprises a sandwich panel, an upper skin and a lower skin, and the top frame, the bottom frame, the reinforcing rib frame, the inner skins, the outer skins, the upper skin and the lower skin are all integrally molded from carbon fiber composite materials; and the inner portions of the reinforcing rib frames are filled with sandwichfoam, and the purpose of satisfying the function and structure of the load bearing mode of a suspension-type train body on the premise of light weight of the train body is achieved.
Owner:SOUTHWEST JIAOTONG UNIV

Hinge for locking four-bar mechanism

The invention provides a hinge for locking a four-bar mechanism. The hinge comprises a locking hinge, an eccentric shaft, a limiting screw, a locking hook, a locking pin, a fork hinge, a cam, a hinge spindle, a deployment spring and the four-bar mechanism, wherein the locking hinge and the head of the fork hinge are hinged through the hinge spindle, the head of the locking hook is hinged in the middle of the hinge spindle, the limiting screw is fixed at the tail of the locking hinge along the locking hinge thickness direction, one end of a locking oscillating bar of the four-bar mechanism is hinged with the tail of the locking hinge through the eccentric shaft, the other end of the locking oscillating bar is hinged with one end of a connecting bar through the locking pin, one end of a crank is hinged with the other end of the connecting bar through a connecting bar spindle, the other end of the crank is hinged with the head of the locking hinge through a crank spindle, a crank pin is hinged on an extension arm of the crank, the cam is hinged at one end of the hinge spindle, an inner ring of the deployment spring is fixedly connected with the other end of the hinge spindle, and the outer end of the deployment spring is fixedly connected with the bar spindle. The hinge is applied to deployment and locking of components such as solar wings and high in locking rigidity.
Owner:BEIJING INST OF SPACECRAFT SYST ENG

High-performance fluid damnailg vibration isolator and parallel connecting vibration isolation platform

The invention provides a high-performance fluid damnailg vibration isolator. The high-performance fluid damnailg vibration isolator comprises an upper connecting piece, a lower connecting piece, a rigid rod, an upper main corrugated pipe, a lower main corrugated pipe, an upper buffering corrugated pipe and a lower buffering corrugated pipe, wherein a damnailg hole is formed in the axis of the rigid rod, a first flange is arranged outside the rigid rod, the inner rings of a second flange and a third flange are connected with the two ends of the rigid rod through a diaphragm spring, and the outer rings of the second flange and the third flange are fixedly connected with the upper connecting piece; the upper main corrugated pipe is located between the first flange and the second flange, and the lower main corrugated pipe is located between the first flange and the third flange; the upper buffering corrugated pipe is arranged on the upper side of the second flange, and the lower buffering corrugated pipe is arranged on the lower side of the second flange; the upper main corrugated pipe, the lower main corrugated pipe, the upper buffering corrugated pipe and the lower buffering corrugated pipe are communicated with the damnailg hole and are filled with a fluid medium. The high-performance fluid damnailg vibration isolator has the advantages of being free of friction and fluid damnailg, high in bending rigidity, and capable of improving the performance and application range of the isolator.
Owner:SHANGHAI JIAO TONG UNIV

Steel pipe concrete frame with prestressing tendons and construction method thereof

The invention relates to a steel pipe concrete frame with prestressing tendons and a construction method thereof. The steel pipe concrete frame with the prestressing tendons is formed by connecting composite columns with composite beams through joints. The composite beams are horizontally arranged among the composite columns. The joints are outer sleeving integral type joints internally filled with self-compacting concrete. The composite columns are sectional-type steel pipe concrete composite columns with built-in profile steel. The composite beams are internal-prestress I-shaped steel pipe concrete composite beams. The prestressing tendons arranged in the composite beams bypass joint outer pipes from upper strengthening annular plates with cavities. The prestressing tendons are positioned through single-hole positioning plates and hole-formed double-hole main positioning plates, form symmetrical curve shapes and achieve tensioning and anchoring at joint end beams. The self-compacting fine stone concrete of the composite beams and self-compacting fine stone concrete of the joint end beams are through and form a whole with the joint outer pipes after curing. The problem that beam-column connecting joints of a novel steel pipe concrete frame with prestressing tendons are complex and liable to damage is solved.
Owner:广西万纵建设工程有限公司

U-shaped steel-concrete composite beam

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.
Owner:JIANGSU ZHONGBAO STEEL STRUCTURE

Corrugated web steel beam-concrete combined flat beam and construction method thereof

The embodiment of the invention discloses a corrugated web steel beam-concrete combined flat beam and a construction method thereof. The corrugated web steel beam-concrete combined flat beam comprises a precast reinforced concrete plate, a corrugated web steel beam, a post-cast reinforced concrete plate, anti-shear connecting pieces and steel bars, the corrugated web steel beam comprises a top flange, a bottom flange and a corrugated web, the top flange is welded to the top of the corrugated web, and the bottom of the corrugated web is welded to the bottom flange; and the anti-shear connecting pieces are fusion-welded to the top flange of the corrugated web steel beam, the precast reinforced concrete plate is overlapped to the bottom flange of adjacent corrugated web steel beams and is accommodated between the top flange and the bottom flange, the steel bars are distributed at the upper portions of the corrugated web steel beam and the precast reinforced concrete plate, concrete is cast at the upper portion of the precast reinforced concrete plate, the upper portion of the precast reinforced concrete plate is covered with the anti-shear connecting pieces, and the cast concrete extends to the edge of the top flange and covers a steel bar net, and forms a reinforced concrete laminated slab together with the precast reinforced concrete plate. The corrugated web steel beam-concrete combined flat beam can reduce the occupied building floor height and has improved shear capability.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
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