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Long span structures. 2. LONG SPAN STRUCTURE’S Structures with span larger than 15-20 meters are regarded to as Long Span Structures. For Such structures span is unable to be achieved with ordinary R.C.C. construction. Generally long spans result in flexible, column-free internal spaces, reduces substructure costs and time to erect the structure.
Large-span bridge body structure health monitoring system based on deformation analysis
The invention discloses a large-span bridge body structure health monitoring system based on deformation analysis, and relates to the technical field of large-span bridge body structure health monitoring, the system comprises a multi-modal sensor fusion module, a data processing module, an adaptive algorithm module and a deep learning and predictive maintenance module; and the multi-modal sensor fusion module is used for acquiring data of a plurality of sensors and carrying out cooperative processing. According to the large-span bridge body structure health monitoring system based on deformation analysis, through intelligent fusion of multi-modal sensors, the system can provide more accurate angle measurement under the complex conditions of dynamic loads, environment changes, sensor aging and the like, the measurement precision is improved through sensor redundancy design and a self-adaptive algorithm, and the system is suitable for popularization and application. And meanwhile, the influence of environmental interference and sensor faults on a measurement result is reduced.
Owner:GUIZHOU TRANSPORTATION PLANNING SURVEY & DESIGN ACADEME
Large-span bridge vibration response prediction method based on data driving
The invention discloses a large-span bridge vibration response prediction method based on data driving, and relates to the technical field of bridge vibration response prediction, and the method comprises the following steps: arranging a plurality of sensors at a plurality of key structure parts of a bridge, collecting vibration response data of the bridge during operation in real time based on an initial sampling frequency set based on the inherent frequency of the bridge structure; performing frequency domain analysis on the collected vibration response data, extracting a main excitation frequency component under the current working condition, and constructing a current excitation frequency spectrum; the method comprises the following steps: calling structural modal parameters obtained in a design stage, a static load test or a modal test of a bridge, extracting the natural vibration frequency of each order of structure, and constructing a bridge inherent frequency feature library; according to the method, the resonance state is dynamically identified through frequency domain analysis and the fuzzy risk index, the sampling frequency is intelligently adjusted, high-frequency response accurate capture and resource efficiency optimization are realized, and the sensitivity, the real-time performance and the safety of a bridge health monitoring system are remarkably improved.
Owner:JIANGSU VOCATIONAL & TECHNICAL UNIVERSITY OF ARCHITECTURE
Online health monitoring system suitable for large-span roof truss steel structure
The invention discloses an online health monitoring system suitable for a large-span roof truss steel structure, and the system comprises a structure analysis module which is used for building a three-dimensional finite element model of the roof truss steel structure, carrying out the application of load and boundary conditions, stress-strain analysis and key position recognition, and providing a monitoring point arrangement suggestion; the real-time measurement module is used for selecting and arranging sensors, collecting and transmitting real-time data, preprocessing and storing the data and providing real-time monitoring and alarming functions; and the intelligent analysis module is used for processing and cleaning the collected data, executing anomaly detection and fault diagnosis, carrying out trend analysis and prediction, optimizing the monitoring and analysis process by utilizing machine learning and artificial intelligence technologies, and generating a visual report. According to the invention, comprehensive, online, real-time and accurate health state monitoring of the roof truss steel structure is realized, the safety and stability of the large-span roof truss steel structure are ensured, the service life is prolonged, the maintenance cost is reduced, and the method has important practical application value.
Owner:WUQIANG XISHUI POWER PLANT OF WULING ELECTRIC POWER CO LTD
Cooperative control method and safety monitoring system for double-crane lifting of large-span steel structure
The invention discloses a cooperative control method for double-crane lifting of a large-span steel structure, which comprises the following steps of: pre-installing sensor modules on a crane hook and a steel structure key node before construction, acquiring load distribution and structural deformation data in real time through a multi-source sensor fusion technology, and establishing a unified coordinate system; and the cooperative control system is started to control the hoisting process. The invention further discloses a safety monitoring system for double-crane lifting of the large-span steel structure. According to the invention, the action matching height precision of the two cranes is ensured, the construction precision and the hoisting efficiency are improved, the safety of hoisting operation is guaranteed in all directions, and the accident rate is reduced.
Owner:CHINA STATE CONSTR HARBOR CONSTR
Large-span steel structure splicing device and construction method thereof
ActiveCN119145658ABuilding material handlingLoad-engaging elementsArchitectural engineeringSteel columns
The invention relates to the field of steel structure building construction, in particular to a large-span steel structure assembling device and a construction method thereof.The large-span steel structure assembling device comprises a hoisting mechanism, an assembling jig frame, a clamping mechanism, a lifting mechanism, a fine adjustment mechanism and a sliding mechanism; the steel plates are conveyed into a factory area to be assembled, so that the construction period is greatly shortened; through mutual cooperation of the fine adjustment mechanism and the lifting mechanism, after the large-span steel structure is moved to a designated position, the four jig stand columns and the steel columns are leveled, so that bottom plates of the four steel columns of the pre-assembled large-span steel structure can abut against a concrete base at the same time; and the problems that installation is not accurate due to the height difference of the four large-span steel structures, and the concrete base is impacted due to the fact that the hydraulic thruster descends greatly are solved.
Owner:LONG & CONSTR ENG CO LTD
Method for predicting stability of large-span roof of mine cave experience pavilion
InactiveCN119478572AEasy to adjustImprove forecast accuracyCharacter and pattern recognitionBiological modelsTime dataMulti modal data
The invention relates to artificial intelligence and data processing technologies, and discloses a mine cave experience pavilion large-span roof stability prediction method, which comprises the following steps: collecting data through sensor data collection, visual information collection and real-time environment data collection, and carrying out data fusion and cleaning; inputting sensor data, visual data and environmental disturbance data and outputting an instability risk level based on a multi-modal data prediction model; constructing a risk grade division standard according to the predicted instability risk grade; and dynamically updating the instability probability by using a Bayesian method in combination with historical data and real-time data. The large-span roof safety risk prediction method can accurately predict the safety risk of a large-span roof, so that potential safety risks and hidden dangers can be found in time, hidden dangers can be eliminated in time or personnel and property are transferred, and personnel and property safety is guaranteed.
Owner:贵州轻工职业大学
Experimental model for simulating seismic soil evolution for long-span bridge, and test method
PCT designated stage expiredWO2025020583A1Non-rotating vibration suppressionVibration testingSeismic site effectsControl system
An experimental model for simulating seismic soil evolution for a long-span bridge, comprising a vibration table (1), a long-span bridge model (2), damping control devices (3), vibration mechanisms (4), and cooperative control systems (6), wherein the long-span bridge model (2) comprises a plurality of bridge pier bases (21); the damping control devices (3) are fixedly connected between the bridge pier bases (21) and the vibration table (1); the vibration mechanisms (4) cooperatively drive the vibration table (1) to vibrate in the space; each cooperative control system (6) comprises a processor (61), an acceleration sensor (62) and a displacement sensor (63). A test method for dynamic response simulation of the experimental model comprises the following steps: the vibration table simulates an earthquake process, the damping control devices simulate soil evolution or geology of different sites, and the cooperative control systems acquire and collect acceleration and displacement data information of the damping control devices in real time and analyze structural responses of a long-span bridge. The experimental model can simulate seismic responses of a bridge under seismic site effects and non-uniform excitations, and has high authenticity and accuracy, a wide application range and low experimental cost.
Owner:SOUTHEAST UNIV
Steel structure trestle hoisting device
PendingCN119976622ABase supporting structuresBraking devices for hoisting equipmentsControl systemControl engineering
The invention relates to a steel structure trestle hoisting device, belongs to the technical field of bridge construction machinery, and is used for solving the technical problems that traditional hoisting equipment is low in mounting precision, poor in posture adjusting efficiency and easy to deform in structure. The device comprises a portal crane main body, wherein an electric trolley of which the stroke is matched with the width of a trestle is arranged at the lower part of a fixed cross beam; the dynamic self-adaptive balance assembly adjusts load balance in real time through a rigid frame, a three-axis tilt angle sensor, a balancing weight and an electric push rod. The lifting appliance group adopts a servo motor to drive four lifting hooks to cooperatively work, and a laser positioning assembly is combined for precise positioning; the digital twinning cooperative control system integrates prediction, control logic and a pre-judgment type intervention module through an embedded industrial controller, analyzes data of an encoder and a pressure sensor in real time, predicts deformation and gravity center shift, and dynamically regulates and controls the hoisting speed, the transverse position of a trolley and the balance weight displacement. The device is suitable for high-precision rapid installation of the large-span steel structure trestle, and the construction safety and efficiency are improved.
Owner:CITIC CONSTR
Two-span continuous stiff overhanging large-span roof structure adopting direct tensioning technology
Owner:CHINA ARCHITECTURE DESIGN & RES GRP CO LTD
Fine reconstruction method for radar detection blind area wind field of anemograph collaborative networking
ActiveCN120594878ABiological modelsDesign optimisation/simulationData integrityReconstruction method
The invention discloses a radar detection blind area wind field fine reconstruction method based on anemograph collaborative networking, and the method comprises the specific steps: firstly, separating wind speed measurement deviation caused by vibration displacement in real time, eliminating vibration interference, carrying out the automatic diagnosis and restoration of data based on machine learning, and optimizing the integrity of wind speed data and the measurement continuity; secondly, an ultrasonic anemograph array optimization arrangement method oriented to global wind field sensing is established, time-space consistency calibration of multi-sensor data is achieved, and the precision and reliability of wind speed measurement are improved; and finally, carrying out data-physical fusion bridge flow field high-resolution intelligent reconstruction, and improving the data integrity of a complex flow field area. The reconstruction method effectively cooperates with the wind measurement laser radar and the anemograph, the advantages of high-frequency single-point measurement and wide-area space scanning of the wind measurement laser radar and the anemograph can be exerted, high-precision reconstruction of the global flow field of the bridge is expected to be achieved, and reliable support is provided for guaranteeing wind resistance safety of a large-span bridge.
Owner:SOUTHEAST UNIV
Large-span truss hoisting and splitting system and method based on digital twinning
PendingCN121257272AInput/output for user-computer interactionGeometric CADData acquisitionVirtual control
The invention discloses a large-span truss hoisting and splitting system and method based on digital twinning, and belongs to the technical field of building construction, and the system comprises a physical entity unit, a data acquisition and transmission unit, a digital twinning model unit, a function service and data analysis unit and an application and interaction unit. According to the invention, through real-time sensing of a physical entity state, multi-source data fusion transmission, high-precision digital twinning modeling, intelligent simulation analysis and decision optimization, and fusion of multi-modal man-machine interaction, a virtual control system which is in whole-course synchronous mapping and bidirectional interaction with a physical entity is constructed; according to the method, real-time visual monitoring, trend prediction and risk early warning of the hoisting and splitting process can be achieved, scheme preview and dynamic optimization are supported, virtual-real fusion operation guidance is achieved through the AR technology, and the safety, precision and efficiency of hoisting and splitting operation of the large-span truss are improved.
Owner:武汉市政环境工程建设有限公司
Large-span steel structure high-altitude slip real-time monitoring mechanism based on multi-sensor fusion
The invention relates to the technical field of steel structure construction, and discloses a large-span steel structure high-altitude slippage real-time monitoring mechanism based on multi-sensor fusion, comprising two slippage supports which are slidably arranged on a steel structure slippage track and are used for supporting a large-span steel structure; the detection assembly is movably arranged between the two sliding supports, located at the bottom of the steel structure and used for detecting the midspan curvature of the steel structure; the supporting plate is movably arranged between the two sliding supports and used for supporting and protecting the large-span steel structure; the driving assembly is arranged on the sides, close to each other, of the two sliding supports and used for driving the supporting plate to move at the bottom of the steel structure. The large-span steel structure high-altitude slippage real-time monitoring mechanism based on multi-sensor fusion can effectively solve the problem that in the prior art, a large potential safety hazard possibly exists due to deformation and damage in the slippage construction process of a large-span steel structure.
Owner:SHANDONG HUAKE PLANNING & ARCHITECTURAL DESIGN CO LTD
Beidou digital twinning system for precision hoisting of bridge steel member and hoisting method
The invention belongs to the field of bridge engineering construction monitoring and intelligent control, and provides a Beidou digital twinning system for bridge steel member precision hoisting and a hoisting method aiming at the problems of low efficiency and poor real-time performance of on-site hoisting of a segment steel member in a large-span bridge structure. The system comprises a multi-source data acquisition module, a coordinate conversion module, an attitude calculation module, a three-dimensional virtual model construction module, a hoisting motion state monitoring module and a digital twinning module. The attitude resolving module calculates a standard attitude vector by using a comprehensive deep learning model according to the degree-of-freedom data, the attitude information and the movement speed, and performs attitude resolving based on the standard attitude vector to obtain an attitude angle of the bridge steel member; the hoisting motion state monitoring module can perform safety early warning and posture adjustment when the bridge steel member is abnormal; and the digital twin module can synchronously update the attitude information and the three-dimensional virtual model of the bridge steel member to obtain the current space trajectory and historical state of the bridge steel member.
Owner:CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP CO LTD
Large-span bridge pneumatic admittance identification method and device based on operation measured data
The invention provides a long-span bridge pneumatic admittance identification method and device based on operation measured data, and relates to the technical field of bridge safety, and the method comprises the steps: building a generalized motion equation of a long-span bridge under the action of buffeting force; establishing a bridge finite element model, and updating the bridge finite element model through operation measured data to obtain an optimal bridge finite element model; calculating a fluctuating wind coherence function of the large-span bridge girder; obtaining a three-component coefficient, a three-component force and a generalized buffeting force of the long-span bridge at different wind attack angles based on the optimal bridge finite element model; performing frequency domain analysis on the generalized motion equation to obtain simulated power spectral density of each point of the large-span bridge girder; and based on the simulated power spectrum density, identifying pneumatic admittance parameters in a preset pneumatic admittance function, and completing pneumatic admittance identification of the long-span bridge. According to the method, the problem that the pneumatic admittance of the long-span bridge in the operation period cannot be identified by an existing method is solved.
Owner:SOUTHWEST JIAOTONG UNIV
Movable crossing frame capable of automatically unfolding telescopic cloth net
The invention discloses a mobile crossing frame capable of automatically unfolding a telescopic cloth net, and relates to the field of crossing frames for power line construction. A traditional electric power line crossing frame is usually built by adopting moso bamboos or steel pipes, and the building mode of the crossing frame is long in construction period and large in safety risk. The automatic net arranging device comprises a U-shaped frame body, a front automatic net arranging mechanism capable of automatically arranging a bearing net forwards, a rear automatic net arranging mechanism capable of automatically arranging the bearing net backwards, a telescopic stay cable and an adjustable connecting frame capable of adjusting a pitching angle and a horizontal rotation angle, wherein the extension length of the bearing net can be flexibly set according to field conditions; and a plurality of rolling shafts are arranged on a cross beam of the U-shaped frame body. The crane can be used as a mobile platform to carry out flexible mobile construction, the construction period is short, the telescopic stay cable can have pretightening force to synchronously extend with the front and rear automatic net arrangement mechanisms, the bearing capacity and flatness of the net blocking platform are enhanced, the adaptability and safety of large-span construction are improved, and the traction resistance of a wire can be reduced through the rolling shafts.
Owner:ZHEJIANG ELECTRIC TRANSMISSION & TRANSFORMATION ENG CO
Beam string structure optimization method for reinforcing large-span steel corridor
ActiveCN119249576ASimulation is accuratecontrol stressGeometric CADDesign optimisation/simulationElement modelPre stress
The invention provides a beam string structure optimization method for reinforcing a large-span steel corridor, and belongs to the technical field of building construction.The method comprises the steps that firstly, a three-dimensional finite element model is established, the three-dimensional finite element model comprises an upper steel corridor, vertical supporting rods and inhaul cables, and boundary conditions and dead load and live load are set; performing nonlinear analysis to obtain an initial deflection value and a stress value, and judging whether reinforcement requirements are met or not. And if not, adjusting the length of the supporting rod and the prestress of the inhaul cable, and repeatedly analyzing and calculating until the requirements are met. Then, the structural deflection serves as a control parameter, the strain of the inhaul cable serves as a response parameter, cable force optimization calculation is conducted through an SAP2000CSiLoadOptimizer toolbox, and an optimized strain value of the inhaul cable is obtained. And finally, according to an optimization result, a final cable force optimization scheme is obtained through back-stepping, and specific process parameters of the beam string structure for reinforcing the large-span steel corridor are determined. The problem that an existing method cannot comprehensively reflect the nonlinear mechanical property of the structure is solved.
Owner:CHINA CONSTR EIGHTH BUREAU DEV & CONSTR CO LTD
Photovoltaic support structure of super-large span cable-stayed string truss combined system
ActiveCN222464484UGuaranteed stiffnessovercome stressPhotovoltaic supportsSolar heating energyArchitectural engineeringTower
The utility model discloses a photovoltaic support structure of a super-large span cable-stayed string truss combined system, which comprises a space net-shaped truss suspended above a spanning area and tower column foundations arranged at two ends of the spanning area, the tower column foundations are pre-buried and fixed underground, and tower column bodies are mounted on the tower column foundations. Each tower column body is provided with a plurality of stay cables, the stay cables are connected with the spatial net-shaped truss, and the spatial net-shaped truss is used for laying photovoltaic panels. According to the utility model, the tower column body and the stay cables on the tower column body are mutually connected with the string truss, so that the rigidity of the structure is ensured, the large-span requirement of more special sites can be met, and the popularization and application of the photovoltaic technology are facilitated.
Owner:CHINA MCC5 GROUP CORP LTD
Large-span stiff skeleton arch bridge skewback foundation mass concrete crack control method
The invention discloses a large-span stiff skeleton arch bridge skewback foundation mass concrete crack control method, and relates to the technical field of bridge engineering, and the system comprises the following components: S1, building a collaborative analysis model, S2, analyzing deformation influence, and S3, implementing crack control measures. The method has high pertinence and practicability by adjusting the concrete mix proportion, adding the admixture, setting temperature control measures and optimizing the reinforcement design, the concrete mix proportion and the cement dosage can be adjusted in a targeted mode through the concrete stress distribution condition and the stiff skeleton deformation condition obtained through the collaborative analysis model, and the construction efficiency is improved. The additive is added to reduce the adverse effect of hydration heat, meanwhile, effective temperature control measures are set according to the temperature field distribution condition, in addition, by optimizing the reinforcement design, the bearing capacity and crack resistance of the skewback foundation can be further improved, the crack risk of large-size concrete of the skewback foundation of the large-span stiff skeleton arch bridge is effectively reduced, and the service life of the large-span stiff skeleton arch bridge is prolonged. And the overall quality and safety of a project are improved.
Owner:CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP CO LTD +3
Construction method for suspended pouring beam hanging basket of high-pier large-span extra-large bridge
The invention discloses a high-pier large-span extra-large bridge suspended pouring beam hanging basket construction method, and belongs to the field of bridge engineering construction.The method comprises the following steps that hanging basket rails are installed, the precision is controlled, and a hanging basket comprising a double-channel-steel main truss, a manganese steel sling, an arc-shaped flow guide plate and a honeycomb formwork is assembled; grading pre-pressing is carried out according to the specified multiple of the design load, and the pre-camber of the template is corrected by adopting a BP neural network to ensure that the finished bridge linear error meets the requirement; a mechanical-hydraulic-electrical integrated intelligent control system is deployed, and the traveling speed and synchronism of the hanging basket are controlled through double-oil-cylinder driving, a 5G digital twin platform and an edge computing technology, so that rapid alarm is realized when the load is abnormal; segmental circulation construction is carried out, and when the environment wind speed reaches a set value, a hydraulic rail clamping device is automatically locked; a model is established by using ANSYS software, and simulation verification is performed on multiple types of key working conditions to ensure that the safety coefficient of the structure meets the specification requirement. The construction precision and safety are guaranteed, and the method adapts to complex environments.
Owner:HUNAN COMM INT ECONOMIC ENG COOP
BIM (Building Information Modeling)-based large-span post-tensioned bonded prestressed beam construction method
ActiveCN120724708AGeometric CADDesign optimisation/simulationMultiscale decompositionAdaptive filtering algorithm
The invention discloses a BIM (Building Information Modeling)-based large-span post-tensioned bonded prestressed beam construction method. The BIM-based large-span post-tensioned bonded prestressed beam construction method comprises the following steps: collecting a vibration signal of a working rib and a matt rib reference signal of a matt rib; inputting the dummy rib reference signal into an adaptive filtering algorithm to which phase preserving constraint is applied, and performing noise cancellation processing on the working rib vibration signal to generate a purified pressure wave signal; performing multi-scale decomposition on the purified signal, extracting propagation time delay of the direct wave based on coherence analysis among components, and generating a phase-time delay characteristic matrix; and based on pre-configured geometric parameters of the BIM three-dimensional model, a real-time stress distribution field is calculated through inversion according to the phase-time delay characteristic matrix, and the real-time stress distribution field is synchronously updated to the BIM three-dimensional model. According to the method, the phase distortion problem under noise interference is solved through a physical reference channel and phase preserving filtering, the accuracy of time delay extraction is improved through a multi-path separation technology, and high-precision and high-robustness real-time monitoring of the prestress is achieved.
Owner:CHINA RAILWAY CONSTR ENG GRP FOURTH CONSTR CO LTD +1
Large-span steel arch building monitoring and early warning method and system based on digital twinning
The invention belongs to the technical field of steel arch building monitoring, particularly relates to a large-span steel arch building monitoring and early warning method and system based on digital twinning, and solves the technical problems that the structural state of a large-span steel arch building cannot be comprehensively and accurately mastered in real time, and early warning and monitoring cannot be comprehensively and timely performed. According to the method, the three-dimensional twinborn model is constructed through the BIM technology, and the sensor data is mapped, so that the real-time data of different nodes of the large-span steel arch building can be intuitively and comprehensively obtained in real time. Compared with a traditional monitoring mode, the building structure state can be visually analyzed on the basis, the monitoring accuracy and comprehensiveness are greatly improved, and a scientific and systematic analysis process is established; through identification of stress data distribution conditions under different working conditions and comparison with material allowable stress, a stress change rate preset value, a safety margin reserved safety margin and the like, whether the structure is abnormal or not can be accurately judged, and an early warning signal is generated in time.
Owner:INSTALLATION BRANCH WEIHAI CONSTR GRP CO LTD
Method and system for determining reasonable vertical stiffness of long-span new highway bridge
PCT designated stageWO2025161640A1Geometric CADSustainable transportationElement modelArchitectural engineering
Disclosed in the present invention are a method and system for determining reasonable vertical stiffness of a long-span new highway bridge. The method comprises: by means of a finite element model for an initial design scheme of a long-span new highway bridge, calculating a vertical deflection-to-span ratio and a beam end vertical rotation angle of the bridge under the characteristic combination of a permanent load, a live load, a temperature action, and a wind load; performing checking calculation on indicators for driving safety and comfort on the bridge, indicators for the usage of a beam end bearing and an expansion joint, and indicators for a vertical curve of a route after vertical deformation of a main girder; taking the requirements for the driving safety and comfort on the bridge, the requirements for the usage of the beam end bearing and the expansion joint, and the requirements for the vertical curve of the route after the vertical deformation of the main girder as constraints to decrease or increase bridge design parameters in the finite element model; and determining, as the minimum value of the reasonable vertical stiffness of the bridge, the maximum vertical deflection-to-span ratio and the maximum beam end vertical rotation angle in all schemes satisfying the constraints. The present invention can provide a reliable reference for the reasonable design, economy, and safety of long-span new highway bridges.
Owner:CCCC HIGHWAY BRIDGES NATIONAL ENGINEERING RESEARCH CENTRE CO LTD
Monitoring device for health of large-span building structure and Internet of Things system
PendingCN119316815Awork lessreduce workloadParticular environment based servicesNetwork topologiesStructural monitoringThe Internet
The invention relates to building structure monitoring, in particular to a monitoring device for health of a large-span building structure and an Internet of Things system. Which comprises an unmanned aerial vehicle and a monitoring server, and is characterized by further comprising a passive sensor and a reading transmission module, and the passive sensor is used for collecting state information of a building structure and wirelessly uploading the state information to the reading transmission module; the reading transmission module wirelessly uploads the state information of the building structure to the monitoring server. According to the invention, the RFID is combined with the sensor, so that the wiring work is omitted, and the workload of implementation and maintenance is greatly reduced; data are obtained through automatic cruise of the unmanned aerial vehicle, labor is saved, and punctual data are obtained; the Internet of Things is further wireless, the sensor at the tail end supplies power and obtains data in an RFID wireless mode, the most tedious wiring work is omitted, and arrangement and compensation of the Internet of Things sensors are facilitated.
Owner:CHINA MCC22 GROUP CORP LTD +3
Steel roof steel structure with anti-seismic continuous fusiform blades and construction method of steel roof steel structure
The invention discloses a steel roof steel structure with anti-seismic continuous fusiform blades and a construction method of the steel roof steel structure. Comprising a first row of stand columns, a second row of stand columns, a third row of stand columns, a first row of cross beams, a second row of cross beams, a third row of cross beams, evenly-distributed forked columns, eccentric forked columns, a first row of continuous fusiform steel net frames, a second row of continuous fusiform steel net frames, a finger corridor connecting net frame and a cantilever canopy net frame. The steel roof in the shape of the two rows of continuous fusiform blades and the highest slope tip formed at the highest position of the second row of fusiform blades are novel and unique, have more sense of space, layering sense and rhythm sense, are more dynamic, can be integrally similar to the shape of a lotus treasure, and have the artistic conception of golden top Buddha light, mountain chain cloud sea and three-river confluence; a unique and novel steel reinforced concrete column and steel tube concrete column combined mode is adopted for supporting, the construction quality can be improved under the condition of large-span hoisting, and the construction difficulty is reduced.
Owner:CHINA CONSTR SECOND BUREAU INSTALLATION ENG CO LTD +3
Intelligent welding equipment for large-span high-speed rail station grid structure
ActiveCN120133843AWelding/cutting auxillary devicesAuxillary welding devicesElectric machineryWeld seam
The invention belongs to the technical field of welding, and discloses intelligent welding equipment for a large-span high-speed rail station grid structure. Comprising a support, a welding equipment body and a first mounting frame. By arranging the adjusting assembly, when the surrounding welding diameter of the welding equipment body needs to be matched with the diameter of a circumferential weld, after a steel pipe is arranged on the supporting frame, a second motor is started, a plurality of semicircular blocks extrude a plurality of semicircular balls to move, and the semicircular balls drive pressure sensors to move through sliding rods; a plurality of pressure sensors are made to make contact with a steel pipe at the same time, the numerical values of the pressure sensors are kept within a certain range, that is, auxiliary clamping is conducted on the steel pipe, a semicircular ball drives a vertical rod and a telescopic sleeve to move downwards through an insertion hole and an insertion rod in the movement process, and the telescopic sleeve drives a lifting column to move downwards; therefore, the purpose of adjusting the diameter of the surrounding welding track according to the diameter of the circumferential weld is achieved.
Owner:THE 2ND ENG CO LTD OF CHINA RAILWAY URBAN CONSTR GRP
Bridge stay cable video multi-target identification tracking and vibration extraction method based on unmanned aerial vehicle
ActiveCN120931896AImage analysisCharacter and pattern recognitionCorrection algorithmMulti target tracking
The invention provides a bridge stay cable video multi-target identification tracking and vibration extraction method based on an unmanned aerial vehicle. The method comprises the following steps: 1, constructing a bridge stay cable refined inclined slender target detection model based on a YOLOv11 model; 2, providing a multi-target tracking algorithm fusing the inclined slender target detection model and a StrongSORT algorithm; step 3, improving a displacement extraction method combining SIFT / ORB feature point matching and a sub-pixel refinement technology; 4, designing an unmanned aerial vehicle motion correction algorithm based on variational mode decomposition and time-frequency domain combined screening; and 5, constructing a joint working modal analysis algorithm for realizing combination of a natural excitation technology and a random subspace recognition algorithm. According to the method, high-precision extraction of the vibration signals of the stay cable and identification of modal parameters of the stay cable are realized, and technical support is provided for health monitoring of the large-span cable-stayed bridge.
Owner:HARBIN INST OF TECH
Prefabricated large-span reinforced concrete floor capable of being assembled and adjusted
The invention relates to the technical field of constructional engineering, in particular to a prefabricated large-span reinforced concrete floor capable of being assembled and adjusted. The floor slab comprises a prefabricated reinforced concrete slab with the length extending in the front-back direction, the front side and the rear side of the lower end face of the prefabricated reinforced concrete slab are each provided with a set of lap joint parts extending downwards, and a bottom support assembly fixed to the lower end face of the prefabricated reinforced concrete slab is arranged between the two lap joint parts; the bottom support assembly comprises a plurality of bottom support units which are arranged at intervals in the front-back direction, the bottom support units are symmetrically arranged in the front-back direction with the center of the prefabricated reinforced concrete slab as the center, the lower end of the bottom support unit in the middle is lower than the lower ends of the bottom support units on the two sides, and a prestress inhaul cable is connected between the two lap joint parts. And the lower end of each collet unit is supported and fixed on the prestressed inhaul cable. The bottom support assembly and the prestress inhaul cable are adopted to replace a lower flange and a web, the self weight is light, meanwhile, the lap joint part is arranged, the contact area of the floor and a building structure is increased, stress is reduced, assembling is convenient, and safety is improved.
Owner:NORTHWEST ENGINEERING CORPORATION LIMITED
Large-span steel box basket arch bridge arch foot stress performance analysis and optimized installation method
PendingCN119442793AImprove mechanical performanceimprove securityGeometric CADForecastingElement modelArchitectural engineering
The invention relates to the technical field of bridge construction, in particular to a large-span steel box basket arch bridge arch foot stress performance analysis and optimal installation method, which comprises the following steps of: investigating a project background and a research status; establishing and analyzing a full-bridge finite element model; establishing a local model of the steel box concrete arch springing; carrying out local stress performance analysis on the arch springing; carrying out arch foot optimization design scheme planning; analysis and comparison of an optimization design scheme; formulating an optimized installation method; according to the method, the actual stress state of the bridge can be accurately simulated by establishing the finite element model of the full bridge and the local arch springing, an accurate mechanical analysis basis is provided for optimization design and construction, an optimization design scheme of the concrete filling length and partial filling is provided, the optimization effect is evaluated through stress analysis, and the technical and economic indexes of the bridge can be evaluated. The stress performance of the arch springing is effectively improved, and the overall safety of a bridge is improved.
Owner:ANHUI HIGHWAY BRIDGE ENG CO LTD
Large-span concrete structure construction method based on frequency modulation mass damper
PendingCN120174979AForms/shuttering/falseworksAuxillary members of forms/shuttering/falseworksArchitectural engineeringLong span
The invention discloses a large-span concrete structure construction method based on a frequency modulation mass damper, which comprises the following steps: firstly, erecting a formwork body, paving a beam bottom formwork, and then binding beam steel bars; then, profile steel embedded parts are installed, embedded lug plates are welded, and H-shaped steel beams are installed; then, a beam side mold is closed and reinforced; then, a frequency modulation mass damper is installed and welded and fixed, and a weld joint is coated with anti-corrosion and fireproof paint; construction of a structural formwork is conducted on the portion where the frequency modulation mass damper is installed; finally, concrete is poured; and after concrete pouring is completed, the formwork is removed, and construction of the large-span concrete structure with the frequency modulation mass damper is completed. The purpose of saving the construction period is achieved by improving the construction process, the project of reserving a hoisting hole is omitted by installing the damper in place in advance at a time, the risk of leakage of the structural slab due to a construction joint can be avoided, and the purpose of saving the construction period can be further achieved.
Owner:THE SECOND CONSTRUCTION ENGINEERING CO LTD CCSEB
Method and device for determining linear operation and maintenance standard of long-span bridge
PendingCN119537787ADetermine operation and maintenance standardsaccurately determineData processing applicationsSustainable transportationVibration accelerationSimulation
The invention provides a method and a device for determining a linear operation and maintenance standard of a long-span bridge. The method comprises the following steps of: firstly, determining a quantitative relation between a track static long-wave uneven cis-chord measurement value and vehicle body vertical acceleration data; determining a vehicle body vibration acceleration limit value caused by the dynamic deformation of the high-speed railway bridge according to a vehicle body vertical acceleration limit value caused by the uneven static long wave of the track on the high-speed railway bridge, a vehicle body vibration acceleration value caused by the dynamic deformation of the high-speed railway bridge and a vehicle body vibration acceleration value caused by the random irregularity of the track; and finally, determining a linear chord measurement value of the high-speed railway bridge according to the quantitative relation and a vehicle body vibration acceleration limit value caused by dynamic deformation of the high-speed railway bridge. The method can effectively solve the problem that in the technical field of rail transit, the operation and maintenance standard of the line shape of a long-span bridge is not accurate.
Owner:CHINA ACADEMY OF RAILWAY SCI CORP LTD +2