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10795results about "Bridge structural details" patented technology

Self-resetting pier column structural system with built-in energy dissipation assembly and implementing method for self-resetting piper column structural system

InactiveCN102409606ASufficient ductility and energy dissipation capacityStrong enoughBridge structural detailsBridge erection/assemblyBridge engineeringResidual deformation
The invention discloses a self-resetting pier column structural system with a built-in energy dissipation assembly and an implementing method for the self-resetting pier column structural system, and belongs to the field of bridge engineering. The self-resetting pier column structural system consists of a pier column, a bridge abutment, energy dissipation steel bars, non-adhesion prestressed steel bars with an elastic resetting function and an embedded part; in the novel pier column structural system capable of effectively reducing residual deformation and ensuring sufficient energy dissipation, a pier is connected with the bridge abutment through the energy dissipation steel bars and the non-adhesion prestressed steel bars. Compared with the conventional pier column node, the self-resetting pier column structural system has the advantages that: the non-adhesion prestressed steel bars are positioned in the axle center of the pier column, a self-resetting restoring force can be generated, and the problem that the conventional pier has large residual deformation under the action of an earthquake load and cannot serve people any longer can be solved well; the self-resetting pier column structural system is flexible in design and definite in structural stress; the pier is ensured to have sufficient strength and rigidity; and the self-resetting pier column structural system can be implemented by a prefabricating or on-site pouring method, is easy and convenient to construct, and is an advanced and practical novel pier column system.
Owner:TSINGHUA UNIV

A kind of steel truss bridge and its manufacturing method

The invention discloses a steel truss bridge and a method for fabricating the same. The steel truss bridge comprises a steel box girder bridge deck, a main truss composed of two steel trusses, and a steel portal frame. The steel truss comprises an upper chord member, a lower chord member, and a web member which is connected with the upper chord member and the lower chord member through bolts. A sidewalk bracket is arranged outside each steel truss. The lower chord member is connected to the steel box girder bridge deck and the sidewalk bracket, respectively. Besides, the two steel trusses are connected through the steel portal frame. During fabrication, all the sections of the steel trusses, the steel portal frame and the bridge deck are independently fabricated, respectively; all the sections of the upper and lower chord members of the steel truss are pre-assembled circularly with the corresponding web members, and all the sections of the steel box girder bridge deck are pre-assembled with the corresponding lower chord members by an orthotectonic method, respectively; and the steel portal frame is pre-assembled with the steel trusses. The steel truss bridge disclosed by the invention completely meets the design requirements so that the stability and safety factor of the bridge can be enhanced; and by employing the fabricating method, positioning is accurate so that the risks during the field assembling can be reduced; and the construction period can be shortened.
Owner:JIANGSU JINGHU HEAVY IND

Permanent-magnet type eddy current tuned mass damper

ActiveCN101761146APrecise linear motionStructural damping dropBridge structural detailsTowersStress concentrationElectricity
The invention relates to a permanent-magnet type eddy current tuned mass damper which comprises a steel magnetic-conducting baseplate (10), wherein end plates (3) are respectively arranged at two ends of the baseplate (10). The permanent-magnet type eddy current tuned mass damper is characterized by also comprising a circular shaft (4) and a linear bearing seat (5), wherein two ends of the circular shaft (4) are respectively arranged on the corresponding end plates (3), and the linear bearing seat (5) is sleeved on the circular shaft (4) and can slide on the circular shaft (4); the lower part of the bearing seat (5) is connected with a mass block (6), and two ends of the mass block (6) are respectively connected with the corresponding end plates (3) through spiral springs (7); the lower part of the mass block (6) is connected with a permanent magnet (13), and a copper plate (12) is arranged below the permanent magnet (13) and connected with the baseplate (12) through a cushion block (11). By adopting an eddy current damping model with special design, the permanent-magnet type eddy current tuned mass damper realizes the damping adjustability of the damper in a larger range, realizes the complete separation between the system rigidity and the damper, and cancels the mechanical friction energy consumption and stress concentration elements, thereby avoiding the common TMD damage failure.
Owner:湖南省潇振工程科技有限公司 +1

Damage-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier and manufacturing method thereof

The invention discloses a damage-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier and a manufacturing method thereof, and belongs to the field of bridge engineering. An exposed node connecting piece consists of a foot plate, anchor bolts, end connecting plates and buckling restraining sleeves. A connecting plate is mounted between prefabricated steel pipe concrete sections through high-strength bolts; the exposed node connecting piece is connected with each of a cover beam and a bearing platform by utilizing the anchor bolts, and is connected with a prefabricated steel pipe concrete section through the high-strength bolts relying on the end connecting plates. A pre-stressed tendon penetrates through a section prefabricated steel pipe concrete pier; the two ends of the pre-stressed tendon are respectively anchored to the interiors of the bearing platform and the cover beam by using anchorage devices. The energy consumption-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier disclosed by the invention has the characteristics of small post-seismic residual displacement, high energy consumption capacity, controllable energy consumption, high assembling degree, convenience and quickness in construction process, greenness, high efficiency, energy conservation, environment friendliness, easiness in factory production, convenience and quickness in construction, and the like; the construction period of the pier can be remarkably shortened.
Owner:BEIJING UNIV OF TECH

Pier column prefabrication splicing building technology

The invention provides a pier column pre-casting splicing construction technique working method, which is characterized in that: on a land construction site, a pier body of the whole bridge pier is pre-cast by segments, pier body end heads of each segment are buried with outwardly-extending reinforcement bars, and all segments are transferred to the pier construction site for pier assembly. The working method has the advantages of having light bridge piers, reducing the number of projects, saving manpower, lowering construction costs, having good construction quality and quick construction, solving the problems of reliability, safety, anti-crack property and durability between pier columns pre-cast by segments and between the pier columns and a bearing platform connecting structure, reducing the influence of natural conditions on construction period, reducing construction cost and construction risk, reducing the number of cast-in-situ concrete and equipment such as a hoisting machine and the like and effectively saving cost. Due to the advantages of the splicing type bridge pier and the development of various high strength concrete materials in recent years, the working method is applied to water bridges with large scale, multiple bridge spans, adverse natural environment, and difficult construction due to the influence of wind, wave, current, rain and fog.
Owner:NO 1 ENG COMPANY CO LTD OF CCCC FIRST HARBOR ENG COMPANY +1

Construction method of marine self-floating type steel soleplate single-wall suspension box cofferdam and single-wall suspension box cofferdam

The invention discloses a construction method of a marine self-floating type steel soleplate single-wall suspension box cofferdam and a single-wall suspension box cofferdam, wherein the construction method comprises the following steps of: firstly installing a soleplate suspended shoulder pole girder and lowered guiding device of the cofferdam, then installing a steel soleplate, a lateral plate and an inner support, then carrying out the construction of lowering, fixing and bottom sealing by concrete of the cofferdam and finally carrying out the construction of a bearing platform. The cofferdam can be repeatedly used after being dismantled. The marine self-floating type steel soleplate single-wall suspension box cofferdam comprises the steel soleplate, the lateral plate, the inner support and the soleplate suspended shoulder pole girder and lowered guiding device. The steel soleplate of the invention is of a self-floating type assembled structure, an inner inclined strut of the cofferdam is utilized as a distributing girder suspended on the cofferdam when in the construction of bottom sealing by concrete, the lateral plate adopts a massive integral design, and meanwhile, an inner guide girder and the lateral plate are combined into a whole, thereby improving the integral rigidity of the lateral plate and also reducing the assembled working procedures of the cofferdam. The invention has the advantages of effective acceleration of construction schedule, simple and convenient construction operation, high repeated use ratio, safety, reliability and less cost investment.
Owner:THE 5TH ENG MBEC

Big-tonnage cantilever type horizontal tuned mass damper for regulating eddy-current damping

The invention relates to a horizontal vibration energy-absorbing and vibration-damping device used for large engineering structures such as a longspan foot bridge, belonging to the field of vibration control of civil engineering structures. The horizontal vibration energy-absorbing and vibration-damping device comprises a constant strength cantilever beam consisting of struts at two sides and a cross beam, two ends of the cross beam are respectively and correspondingly connected with the struts at two sides, and the bottom ends of the struts at two sides are fixed on a foundation. The horizontal vibration energy-absorbing and vibration-damping device is characterized in that the upper end of a mass block is connected with the cross beam, the lower end of the mass block is provided with a rectangular permanent magnet; and one side of the lower part of the mass block is provided with a copper plate fixedly arranged on the foundation through a supporting member, and a gap is reserved between the copper plate and the rectangular permanent magnet. The invention ensures that the rigidity and the dampness of the tuned mass damper system realize complete separation, easily realizes that the damping ratio of TMD is continuously adjustable within a larger range though regulating the gap between the permanent magnet and the copper plate, and effectively solves the problems of oil leakage failure in the conventional TMD, difficult regulation of the damping parameters and interference on the frequency.
Owner:湖南省潇振工程科技有限公司

Automatic climbing mechanism for track inhaul cable and control system thereof

The invention discloses an automatic climbing mechanism for a track inhaul cable. The mechanism comprises an outer framework, and a climbing and walking device and compacting and adjusting devices which are arranged on the outer framework; the outer framework is cylindrical, and one surface of the outer framework is made into a hinged mode and can be freely opened and closed; the climbing and walking device comprises n sets of driving wheel groups with track inhaul cable climbing and walking device structures and m sets of guide wheel groups, and the n sets of driving wheel groups and the m sets of guide wheel groups are arranged on the mounting face of the outer framework through a guide core shaft or uniformly or symmetrically; the number of the compacting and adjusting devices is n+m, the compacting and adjusting devices are arranged on the mounting face of the outer framework respectively, n and m are numbers which are between 2 and 20 and can be divided exactly by 2 or 3, and m also can be 0; and a climbing control system of the mechanism consists of an upper computer and a human-computer interface thereof, a radio transceiving device and a lower computer. The climbing mechanism can stably and reliably climb and decline on the surface of the inhaul cable, the walking device is convenient to compact, balance and adjust the inhaul cable, and the control system of the climbing mechanism is advanced, has simple and convenient operation and can realize wireless or wired control.
Owner:LIUZHOU OVM MASCH CO LTD

Method for constructing segmental prefabricating and assembling swing foundation pier

The invention relates to a method for constructing a segmental prefabricating and assembling swing foundation pier. The pier is assembled by prefabricated segments, and a bearing platform is hinged to a foundation. Except for the uppermost end connected with a cover beam and the bottom end connected with the bearing platform, the middle segments of the pier are same in shape and size. The oblique section of the upper part of the middle pier prefabricated segment slopes and is hollowed into a groove, namely a prefabricated segment groove; the bottom of the middle pier prefabricated segment is manufactured into a bulge with a corresponding shape, namely a prefabricated segment convex slot; the prefabricated segment groove and the prefabricated segment convex slot can realize the assembly of upper and lower pier prefabricated segments and forms the contact connecting surface of the segmental pier. The bottom of the pier is fixedly connected with the bearing platform, and the upper part of the pier is fixedly connected with the cover beam. After the prefabricated segments are assembled, a prestressed cable in a prepared channel is tensioned and anchored. A gap between a pile head and the contact surface of a prepared hole in the bottom of the bearing platform is filled with a rubber material or other elastic materials. The method has the advantages of short construction period, small environmental influence, good vibration isolation effect under earthquake and high anti-seismic property of whole structure.
Owner:BEIJING UNIV OF TECH
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