1932 results about "Bridge engineering" patented technology

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.

The invention discloses an external energy-consumption self-resetting bridge pier stud structure system and a realization method thereof, belonging to the field of bridgework. The structure system mainly comprises a bridge pier stud, a bridge abutment, an unbonded prestressed reinforcement, an external energy consumption device, a pier embedded part and a bridge abutment embedded part, wherein the bridge pier stud and the bridge abutment are connected by the unbonded prestressed reinforcement and the external energy consumption device, so that residual deformation can be effectively reduced, and energy consumption can be guaranteed. The external energy-consumption self-resetting bridge pier stud structure system is flexible in design and has specific structure stress. The unbonded prestressed reinforcement on the axis position of the pier stud can be used for generating self-resetting restoring force. The problem that the traditional bridge pier has larger residual deformation and cannot continuously serve after the earthquake loading action is solved. The bridge pier has enough strength and rigidity. The external energy-consumption self-resetting bridge pier stud structure system is realized in a cast-in-situ or prefabricating mode and is easy to construct and is a novel pier stud structure system which is advanced and practical and can realize quick replacement and repair after the earthquake..

The invention discloses a high-speed rail large-scale bridge performance evaluation method based on health monitoring data, which relates to the field of bridge engineering detection. The high-speed rail large-scale bridge performance evaluation method comprises the steps of arranging an automatic sensor hardware equipment system on a high-speed rail bridge in an optimized manner, achieving automatic data acquisition, carrying out denoise processing, time domain statistical processing, frequency domain processing and the like on measured data in sequence, and evaluating bridge running safety performance based on the health monitoring data. The high-speed rail large-scale bridge performance evaluation method meets the actual requirements of high-speed rail bridge detection and evaluation, can reflect the running safety of the high-speed rail bridge accurately and timely, and provides important guarantee for the safe running of high-speed trains; the evaluation results obtained through adopting the method are unified with the high-speed rail conventional detection and evaluation results, thereby facilitating the actual application of the method for the bridge managers; and decision-making suggestions for targeted bridge maintenance and repair are made on the basis of the evaluation results obtained through adopting the method, thereby being conductive to implementing timely maintenance and dynamic maintenance, and greatly improving the bridge overhaul efficiency.

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.

The invention belongs to the technical field of railway bridge modeling, and particularly relates to a method for using a DYNAMO to achieve rapid modeling and dynamic modifying of a high-speed railway bridge. The method for using the DYNAMO to achieve rapid modeling and dynamic modifying of the high-speed railway bridge is characterized by comprises the first step of decomposing railway bridge engineering to be modeled according to an EBS to obtain different categories of object components, and using an REVIT to build a parameterized model and a parameterized clan database according to characteristics of each category of object components; the second step of building a database of the spatial position of each detailed component corresponding to the object components in the railway bridge engineering to be modeled; the third step of enriching the database obtained in the second step to obtain a modeling database; the fourth step of using a DYNAMO program to call the modeling database and the parameterized clan database to generate a BIM model; the fifth step of modifying the modeling database and the parameterized clan database, and repeating the fourth step to regenerate or modify the BIM model. According to the method for using the DYNAMO to achieve rapid modeling and dynamic modifying of the high-speed railway bridge, modeling is conducted accurately and quickly, and a built model file is small; meanwhile, attributes can be quickly given to the model, thus the information amount of the model is increased, and the model is also conveniently and dynamically modified.

The invention relates to a construction method for integrally sliding a large-span steel pipe arch of a curved bridge, belonging to the field of bridge engineering construction. The method comprises the following steps: firstly, carrying out on-site splicing and welding on the manufacturing and installing sections of a steel pipe arch to form a large hoisting section; then installing a temporary arch-splicing support on a bridge-site longitudinal splicing site position, arranging arch ribs on the temporary arch-splicing support, and adopting an arch springing restraint device to preload arch springings after finishing splicing the steel pipe arch, thus enabling the steel pipe arch to form a stressed entirety; and finally, dismantling the temporary arch-splicing support, and adopting a pushing power system to realize integrally sliding the whole steel pipe arch into a proper position. The construction method of the invention has the advantages of small site occupation, integral hoisting of large sections, less hoisting subsection and less arch-splicing support amount, thus the construction cost is economical, the high-altitude welding quantity is less, the welding quality is ensured, the arch axis linetype control is easy, the steel pipe arch splicing and a concrete beam can be simultaneously constructed, arch splicing is carried out on an ectopic bridge site, the underbridge navigation is not influenced, the construction is safe and the construction progress can be quickened.

The invention discloses a streamlined steel-concrete superimposed box girder, which relates to the technical field of bridge engineering and is used for a long-span bridge girder. Two sides of the superimposed box girder are provided with tuyere structures, and a bridge panel adopts a superimposed structure consisting of prefabricated concrete slabs and a post-poured concrete layer. When the box girder is in use, the superimposed box girder is a streamlined single-box single-chamber or single-box multi-chamber cross section; the tuyere structures are polygonal open thin-walled structures; and longitudinal-transverse prestress is applied in the superimposed bridge panel. The box girder effectively improves the torsional rigidity and wind-resistant stability of the section of the girder, remarkably improves the integrity and durability of the bridge panel, and expands the application of superimposed girders in cable-stayed bridges and other long-span bridges.

The invention discloses a construction method of a multi-point whole incremental launching steel box girder, which belongs to the field of bridge engineering. The construction method uses a dental plate with a tooth socket, which is arranged on a steel box girder and a guiding beam web plate, a jacking force is supplied by an incremental launching jack, wherein a piston rod of the incremental launching jack is equipped with a slider, on which a spinous block with an inclined plane and a control spring are arranged, the inclined plane is arranged on the side of the incremental launching jack, the steel box girder and the guiding beam are applied with the jacking force through the push travel of the incremental launching jack, and the spinous block withdraws from the tooth socket during the return to enter into a next push travel. The construction method also supplies the support and adjusts the elevation of corresponding points through lifting-up the jack, simultaneously the incremental launching jack and the upper portion of the incremental launching jack are all equipped with a displacement sensor and a pressure sensor to collect information, thereby controlling an incremental launching process. The construction method has less consumption of steel material, a support reaction and a thrust force are capable of being controlled, and the problem of the rotation angle of the steel box girder is capable of being excellently solved.

The invention discloses a support system for a long-span cable-stayed bridge, which relates to the technical field of bridge engineering. The support system consists of nine parts including main girders, bridge towers, stay cables, transitional piers, transverse wind resisting bearings, longitudinal viscous dampers with limiting function, longitudinal sliding bearings with limited transverse rigidity, transverse dampers, and telescopic devices. Compared with the prior support system for the long-span cable-stayed bridge, the support system of the invention has the characteristics that the longitudinal viscous dampers with limiting function are arranged between the main girders and the bridge towers; and the longitudinal sliding bearings with limited transverse rigidity and the transverse dampers are arranged between the main girders and the transitional piers. The support system provides effective rigidity and damping for the long-span cable-stayed bridge to ensure that the static force and the dynamic force responses of the bridge are controlled in an acceptable scope; the structural stress is definite; and the applicability is strong.

The present invention relates to high-pressure rotary spraying and core inserting process to form pedestal pipe. The pedestal pile consists of core pile, column and pile depestal. The cylindrical or turned frustum-shaped core pile may be prefabricated reinforced concrete pile, in-situ deposited pile or other pile in different cross section shapes. The pile pedestal below the core pile has diameter greater than that of the core pile. The column has circular, semi-circular of fan-shaped cross section. There may be several auxiliary core piles around the main solid or hollow core pile and several rings in relatively great diameter around the column. The present invention has reasonable design, compact structure, high friction resistance, and wide application in building engineering, bridge engineering, civil engineering, water engineering, etc.

The invention discloses a system for acquiring and analyzing remote data of a bridge. The system comprises a data acquisition module, a data monitoring module, a data storage module and a control module, wherein the control module is connected with the data acquisition module, the data monitoring module and the data storage module and used for controlling the operations of the data acquisition module, the data monitoring module and the data storage module. The remote real-time system for acquiring and analyzing the data of the bridge can be accessed to a bridge acquisition and analyzing system. The system is mainly used for improving the level and efficiency of running, maintenance and management of a large bridge engineering structure, and is favorable for ensuring the security of structures and traveling vehicles.

An upper-bearing typed movable formwork used for cast-in-situ of concrete box girder in bridge engineering, comprising left and right legs (7) which are respectively fixed on a pier, left and right longitudinal / transverse sliding mechanisms (9), bearing devices and a template system. The left and right longitudinal / transverse sliding mechanisms (9) are respectively arranged on the left and right legs (7) and can move horizontally along the left and right legs (7), the bearing devices are respectively fixed on the left and right longitudinal / transverse sliding mechanisms (9), the template system comprises a bottom formwork (6), an internal formwork (3), a left formwork and a right formwork, the bottom formwork (6) is formed by screw connection of a left bottom formwork and a right bottom formwork (6a,6b) which are symmetrical about the axis line of the concrete box girder, two ends of the bottom formwork are respectively fixed on two opposite internal side surfaces of the left main beam and the right main beam (1). The movable formwork also comprises a plurality of adjustable supporting rods (14) used for supporting the template system.

The invention belongs to the technical field of steel truss girder cable-stayed bridge construction in bridge engineering, in particular relating to a quick construction method of a two-tower five-span steel truss girder cable-stayed bridge. By utilizing the quick construction method, the problems that the construction is slow and the final closure mostly influences the closure precision and line shape of the cable-stayed bridge when the symmetric cantilever method is adopting during the construction of the existing two-tower five-span steel truss girder cable-stayed bridge. The quick construction method of the two-tower five-span steel truss girder cable-stayed bridge comprises the following steps: firstly, simultaneously constructing two main tower columns by the same method, constructing the main tower columns through segmented casting, and simultaneously constructing the steel truss girder in the manner of assembling a single cantilever from side-spanning to mid-spanning through auxiliary spanning; then, carrying out the mid-spanning closure of the two main tower columns; and finally, finishing the bridge deck facility. The construction method ensures quick construction speed and is suitable for constructions of all two-tower five-span steel truss girder cable-stayed bridges.

The invention relates to a vertical seismic isolation apparatus. The vertical seismic isolation apparatus comprises an upper portion connecting board, a lower portion connecting board, an upper portion fixed support, a lower portion fixed support, an upper portion sliding support, a lower portion sliding support, a first rigid rod, a second rigid rod, a spring and friction boards. The upper portion fixed support is fixed to the upper portion connecting board; the upper portion sliding support is connected to the corresponding friction board; and the upper portion sliding support and the corresponding friction board are embedded in a sliding channel in the upper portion connecting board. The lower portion fixed support is fixed to the lower portion connecting board; the lower portion sliding support is connected to the corresponding friction board; and the lower portion sliding support and the corresponding friction board are embedded in a sliding channel in the lower portion connecting board. The two ends of the first rigid rod are respectively hinged in the upper portion fixed support and the lower portion sliding support. The two ends of the second rigid rod are respectively hinged in the lower portion fixed support and the upper portion sliding support. The middle portion of the first right rod is hinged to the middle portion of the second rigid rod. One end of the spring is fixed, and the other end of the spring is connected to the lower portion sliding support. The vertical seismic isolation apparatus is simple in structure and low in cost, and is used for vibration control for bridge engineering and building structures in areas having relatively large vertical seismic effects.

The invention discloses a geotechnical model test system based on macro-micro mechanics as well as an elaboration test method. The test system analyzes and processes shot digital images in a model test box in real time through two analysis systems in a computer. The test method organically integrates an indoor model test, field soil observation analysis of foundation soil, partial microscopic observation analysis, numerical value simulation of microscopic mechanics and continuous-discrete coupled numerical value simulation. The invention is suitable for the test research of geotechnical engineering such as building engineering, road engineering, bridge engineering, harbor engineering, river-coast engineering and coastal engineering, can solve common engineering problems and can upgrade the understanding level and the research level to important key problems, such as the influence on extreme environmental conditions of key project construction projects and engineering catastrophes, andthe like.

The invention discloses a control technology of putting down, touching rocks and settlement of a super cofferdam. The invention belongs to the bridge engineering foundation construction field and is applicable to the cofferdam construction in the bridge high-low pile cap foundation. Namely the invention adopts the control technology of putting down, touching rocks and settlement to realize controllable initiative, adjustable ration, controllable position and adjustable deviation during the settlement of the cofferdam. The technology adopts a uniquely designed lifting system and a horizontal guide device to ensure that the cofferdam is safely and accurately settled to the designed position under the synchronous action of the lifting system and the horizontal guide device and through the wall cabin batch water filling mode as well as under the controllable state that the gravity is greater than the buoyancy. The invention effectively solves the problems of putting down and touching rocks of the super cofferdam as well as the settlement precision in the covering layer under the disadvantageous conditions such as tidal rivers with frequent hydrologic change, bigger riverbed height difference and so on, and improves the installation accuracy of the cofferdam.

The invention relates to the technical field of bridge engineering, in particular to a walking type multi-point jacking-pushing construction method which solves problems of safely moving and fast taking place for girders in engineering construction such as bridges, interchanges and the like. The walking type multi-point jacking-pushing construction method is characterized in that a jacking-pushing device integrated with jacking, translation and cross adjustment is arranged so as to realize movement or adjustment of a steel box girder in the longitudinal bridge direction, the transverse bridge direction and the vertical direction; two steps of jacking and pushing are performed alternately to jack the whole steel box girder and then deliver the steel box girder forward; then the steel box girder is put on a temporary mound structure to complete a jacking and pushing process, after that a jacking-pushing oil cylinder is shrunk to the bottom of the oil cylinder so as to perform the next jacking and pushing work; and the steps are circulated. The method provided by the invention has the steps of jacking, pushing, dropping and returning to place, is safe and stable, can be operated conveniently, has low comprehensive engineering cost and high efficiency and can realize the integral movement and adjustment of the steel box girder in the longitudinal bridge direction, the transverse bridge direction and the vertical direction.

The invention discloses a multifunctional comprehensive restraint device for whole construction and operation process of a long-span hybrid-beam cable-stayed bridge and relates to a bridge engineering technique. The multifunctional comprehensive restraint device comprises longitudinal dampers, multidirectional slideable supports and retractable devices. Longitudinal damping devices, longitudinal comprehensive multifunctional devices and transverse windproof supports with independent functions are arranged between a main beam and bridge towers. A damping function is independently realized at the operation period of the bridge. The longitudinal comprehensive multifunctional devices realize solidifying, pushing and limiting functions in the whole construction and operation process of the bridge. The multifunctional comprehensive restraint device provides effective rigidity and damping for the operation period of the long-span hybrid-beam cable-stayed bridge and guarantees that the static and dynamic response of the bridge is within an acceptable range. At the same time, the longitudinal comprehensive multifunctional devices are used for taking a temporary solidifying function in the splicing process of the upper structural cantilever of the bridge and are also used as main beam pushing force-bearing structures under the condition of full-bridge closure, a no-stress geometrical linear bridge construction control method is realized, the functions are clear, the force is born reasonably, the economic and practical performance is high and the multifunctional comprehensive restraint device is suitable for all kinds of long-span hybrid-beam cable-stayed bridges.

The invention relates to a method for establishing a bridge BIM model by adopting Dynamo software, which belongs to the technical field of BIM models and mainly comprises the following steps of processing a pile foundation coordinate table provided by a design unit to obtain relative coordinates; reading the pile foundation coordinate table by adopting Dynamo to establish a bridge route; placing abridge pile foundation, a bearing platform, a tie beam, a pier column, a cover beam and a support according to the relation between each pile number and the central pile number coordinate table; adjusting elevation parameters of each component according to the data in the bridge pier feature elevation list in the drawing; placing a box girder, a wet joint, bridge deck pavement and a guardrail, and adopting the Dynamo software to complete the modification of elevation parameters of the box girder, the wet joint, the bridge deck pavement and the guardrail; and rapidly obtaining and restoring the relative coordinates of the pile foundation in Revit into real coordinates, and conducting the error comparison on the real coordinates and pile foundation XY coordinates provided in a constructiondrawing. The method can effectively solve the problem that a traditional method cannot determine a bridge engineering route which is long in route and interrupted in the middle.

The invention discloses a quaternity bridge safety and state monitoring system comprising a construction monitoring system, a load testing system, a routing-inspection and maintenance system and a state monitoring system. The quaternity bridge safety and state monitoring system can share hardware and software resources, and can be connected with a main engineering and traffic engineering via hardware interfaces and joints. Reference model building, model modification and damage identification can be realized by the aid of whole-process information of construction monitoring, load testing, state monitoring and routing inspection and maintenance. State evaluating can be realized by the aid of results of state monitoring and routing inspection and maintenance, and the quaternity bridge safety and state monitoring system is an automatic and manual, integral and local, qualitative and quantitative, objective and subjective, obscure and clear monitoring and evaluating system and is applicable to the field of bridge engineering.

The invention relates to the technical field of a safety protection device in the bridge engineering construction, in particular to an efficient low-cost flexible energy dissipation type pier anti-collision safety device. The invention aims at solving the problems that the safety of an automobile, pedestrians and a pier is difficult to be ensured when the automobile is rigidly collided with the pier in the prior art. The invention adopts a technical proposal at present: the efficient low-cost flexible energy dissipation type pier anti-collision safety device comprises a steel anti-collision wall which is formed by the sheathing of a big protection cylinder and a small protection cylinder; the inner part of the anti-collision wall is a hollow structure and filled with elastic energy dissipation materials; a horizontally-distributed spring component layer is arranged between the protection cylinder and the small protection cylinder; the bottom is arranged on a base steel plate, the external extension part of which is provided with an anchor in a perforating way; and the upper end and the lower end of the inner side of the small protection cylinder are respectively provided with an energy dissipation piece horizontally. The invention has the advantages of: 1) high safety and good effect; 2) simple structure, easy construction and convenient maintenance.

The invention relates to a precast segment assembled concrete filled steel tube bridge pier based on bolted connection, and belongs to the field of bridge engineering. The precast segment assembled concrete filled steel tube bridge pier comprises joint embedded steel connecting parts, precast concrete filled steel tube segments, inter-segment connecting steel tubes and high-strength bolts, wherein each concrete filled steel tube segment comprises a concrete filled steel tube, inner stiffening ribs, reserved bolt holes and preset nuts; each joint embedded steel connecting part comprises an embedded steel tube, an end welding steel plate, inner stiffening ribs, outer stiffening ribs and reserved bolt holes; reserved bolt holes are formed in the two ends of each inter-segment connecting steel tube; the precast concrete filled steel tube segments are connected through the reserved bolt holes by depending on the inter-segment connecting steel tubes and adopting the high-strength bolts; and the precast concrete filled steel tube segments are connected with an upper bent cap and a lower bearing platform through the joint embedded steel connecting parts by adopting the high-strength bolts. The precast segment assembled concrete filled steel tube bridge pier has the characteristics of being high in compression resistance and shear bearing capacity, easy to industrially manufacture, convenient to construct, energy-saving and environment-friendly in use, and the like, can remarkably shorten the construction period of bridge piers, and provides a quick and effective solution for quick bridge construction in highly seismic regions.

The invention discloses a bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier, and belongs to the field of bridge engineering. The bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier comprises precast rectangular concrete filled steel tube sections, pre-buried nodes, connecting plates, high-strength bolts and core penetration bolts; each precast concrete filled steel tube section consists of a steel tube section, concrete, reserved core penetration bolt hole channels, reserved bolt holes, precast screw caps, a sealing material and PVC (Polyvinyl Chloride) tubes; each pre-buried node consists of a precast rectangular concrete filled steel tube section, a foot plate, outside-stiffened ribs and anchor bolts; bolt holes and core penetration bolt holes are formed in each connecting plate according to bolt design positions; adjacent precast concrete filled steel tube sections are connected with each other by the connecting plates, the high-strength bolts and the core penetration bolts. The bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier has the characteristics of high anti-pressure and anti-shear bearing capacity, excellent anti-seismic property, easiness in factory production, convenience and rapidness in site operation, energy conservation, environmental friendliness and the like.

The invention relates to a tuned mass damper adjustable in three directions. The tuned mass damper is used for the vibration reduction of building construction and bridge engineering structures. The tuned mass damper comprises a bracket (2). Slings (1) are arranged on the upper part of the bracket (2). A mass block (5) is arranged on the lower parts of the slings. Springs (7) are arranged on the lower part of the mass block (5), and are positioned on a bottom plate (8). Viscous dampers (6) are arranged between the mass block (5) and the bottom plate (8). A guide rod (4) is connected to the bottom plate (8). The guide rod (4) and a guide sleeve (3) on the bracket form a guide mechanism to limit horizontal movement between the bracket and the bottom plate. The tuned mass damper can be used for the tuned reduction of the vibration of building construction structures, bridge engineering structures and the like in the three directions, natural vibration frequencies in the three directions can be conveniently adjusted, and the damping ratio of the three directions can also be adjusted according to needs.

The invention relates to bridge engineering, in particular to an abrupt slope bare rock drilling platform and a technology in a huge reservoir and used for bridge construction. The invention is characterized in that an abrupt slope bare rock drilling device in a huge reservoir comprises steel pipe piles, a cross beam, a longitudinal beam, cross struts and a steel casing, wherein the steel pipe piles are arranged on the riverbed in a longitudinal and transverse spacing manner; the longitudinal and transverse spaces of the steel pipe piles are connected through a braced plane frame, the longitudinal cross strut and the transverse cross strut; the space surrounded by the four steel pipe piles is internally provided with the steel casing the height direction of which is parallel to the steel pipe piles; and the diameter of the pile foundation steel casing is 280cm, and the steel casing is made by rolling an A3 steel plate with the thickness of 14mm. The construction technology of the platform has 14 steps, and the invention provides the abrupt slope bare rock drilling platform and the technology in the huge reservoir, which can ensure the platform safety, easily heighten or lower the steel pipe piles, ensure the accurate in-position of a drilling machine and the pile foundation verticality, and is convenient to controlling the axial plane position of the pile foundation.

The invention provides steel and a production method thereof. The steel comprises the following components in percentages by weight: 0.12% to 0.17% of C, 0.20% to 0.50% of Si, 1.15% to 1.55% of Mn, not larger than 0.010% of S, not larger than 0.020% of P, 0.010% to 0.060% of Nb, 0.008% to 0.030% of Ti, 0.010% to 0.060% of V, 0.10% to 0.35% of Ni, 0.015% to 0.060% of Als, not larger than 40*10<-6> of N, not larger than 40*10<-6> of O, not larger than 2*10<-6> of H and the balance of Fe and inevitable impurities, wherein Als indicates acid-soluble aluminium. The production method of the steel comprises the steps of pretreatment of molten iron, smelting of top and bottom combined blown converter, LF (Ladle Furnace) refining and RH (Ruhrstahl Heraeus) vacuum cycle degassing which are conducted sequentially. The steel produced according to one aspect of the invention has excellent lamellar tearing resistant performance, low-temperature impact resistant performance and aseismatic performance and can satisfy the requirements of modern bridge engineering for high-performance bridge steel plates.

The invention discloses a self-anchored hybrid beam cable-stayed suspension cooperative system bridge, belongs to the technical field of constructional engineering, and particularly relates to a design for a large-span bridge in the bridge engineering. The bridge is characterized in that after a cable tower and side hole piers are manufactured, a cantilever is assembled to a concrete main bridge of the cable-stayed bridge; after the cantilever is assembled to a side hole, a main cable is hung, two ends of the main cable are anchored on an anchor block at the outer end of a concrete beam respectively, and the anchor block is pulled to a temporary anchor structure by a temporary anchor cable; a hanging rod is hoisted to span each section of steel main beam by a cable crane; after folding, the temporary anchor cables are detached in batch, and the main cables are completely anchored at two ends of the concrete main beam so as to finish the system conversion from temporary ground anchorage to self anchorage; and deck paving and rail construction are finished, the cable force of the whole bridge is adjusted, and the bridge is formed. The self-anchored hybrid beam cable-stayed suspension cooperative system bridge has the effects and advantages of solving the problems of the large-span bridge in design and construction, reducing the height of the tower, fully playing a role of materials, reducing the construction cost, shortening the construction period and reducing the risk in the construction process.

The invention discloses a celled hybrid beam junction with composite connectors, which relates to the technique of bridge engineering and used for a main beam of a large-span hybrid beam cable-stayed bridge. Concrete-filled steel cell structures are disposed at the ends of a steel box girder, welding nail connectors are disposed on a top plate, a bottom plate and a bearing plate of each steel cell while the top plate, the bottom plate and the bearing plate are attached with concrete, and perforated plate connectors (PBL (perfobond leiste) connectors) are disposed on partition plates of each steel cell and integrally concreted with a concrete beam. When the celled hybrid beam junction is used, the main beam has the single-cell single-box, multi-cell and single box or single-cell and double-box cross section, and longitudinal prestress is applied to the interior of each steel cell. By means of the celled hybrid beam junction, the problem of stress of the main beam of the large-span hybrid beam cable-stayed bridge is solved effectively, structural safety is improved, welding of a great quantity of welding nail connectors in each steel cell is avoided, and the applicable span of the hybrid beam cable-stayed bridge is enlarged greatly.

The invention discloses a BIM parametric design method for bridge superstructures, and relates to the field of bridge engineering design, construction and detection. The method comprises the followingsteps of: (1) extracting a space coordinate, a cross slope angle and an oblique crossing angle corresponding to a mileage stake mark corresponding to a path in a bridge range; (2) reading space coordinate point data and generating a path space curve; (3) making a bridge cross section profile; (4) carrying out space coordinate transformation, and arranging the bridge cross section profile at a path control point position; (5) adjusting a rotation angle of the cross section profile according to the cross slope angle; (6) generating the cross section profile into an entity model along the path by utilizing a lofting or lofting fusion function; (7) shearing two ends of the bridge according to the oblique crossing angle so as to complete a bridge upper major structure model; and (8) repeatingthe steps (1) to (7) according to offset distances between components such as a bridge deck system and the like and a road axis so as to generate a complete model. According to the method, the difficulty of establishing three-dimensional models of bridge special-shaped space structures is solved, and parameterization is realized by utilizing data reading and visual programming, so that the precision and efficiency are greatly improved.