766 results about "Structural system" patented technology

The invention relates to a machine learning-based scouring damage bridge buckling load prediction method and system, and belongs to the technical field of machine learning and structural engineering. The prediction method comprises the steps of obtaining original data, preprocessing the original data, constructing a LightGBM machine learning model, and evaluating and verifying the constructed model by adopting multiple performance evaluation indexes. According to the method, key variables such as bridge structure parameters and foundation soil physical property indexes are comprehensively considered, a large sample database covering a large number of scouring combinations is constructed, and the critical buckling load of the structure is accurately calculated as an output target by using a pier-bearing platform-pile structure system buckling analysis method after scouring damage based on an energy method. A multivariable nonlinear mapping relation is established in combination with an ensemble learning algorithm, traditional complex calculation is replaced, and the method has good engineering adaptability and universality and can be suitable for rapid prediction of the buckling bearing capacity under different parameter bridges, different foundation forms and complex scouring conditions.

The invention relates to a wall type-double column combined pier structure system, and belongs to the technical field of bridge engineering. The structure system mainly comprises a cover beam, a swinging pier, a replaceable corrugated steel web wall, a pier bottom energy dissipation device, a swinging steel base, a bearing platform, an unbonded prestressed tendon and the like. A pier bottom energy dissipation device is arranged on the lower portion of the swing pier and composed of energy dissipation steel bars, an outer wrapping steel plate, a bottom steel plate and fixing lug plates. A replaceable corrugated steel web wall is arranged between two piers, and an upper flange plate is directly installed on a cover beam through embedded high-strength bolts and fixed to a bearing platform through a swing steel base. Unbonded prestressed reinforcements penetrate through the center positions of the swinging bridge piers. According to the structural system, a collaborative energy consumption-graded swing mechanism of'corrugated steel web wall deformation energy consumption-corrugated steel web wall swing-pier swing and energy consumption 'is formed under the earthquake action, earthquake energy can be dissipated more effectively, structural residual deformation is reduced, and the structural shock resistance and function restorability are improved.

The invention discloses an anti-seismic strengthening method and system suitable for historical buildings, and relates to the technical field of existing building strengthening. The invention discloses an anti-seismic reinforcement system suitable for historical buildings. The anti-seismic reinforcement system comprises a data modeling module, a risk assessment module, a disturbance analysis module, a buffer decision module, a reinforcement early warning module, a component reinforcement decision module, a collaborative reinforcement decision module and a scheduling optimization module. According to the method, the linkage stress relation and the collaborative response characteristics are identified by establishing the structure coupling model of the adjacent buildings and a strength correlation analysis method, and a theoretical basis and a judgment standard are provided for collaborative reinforcement of cross-building units; the collaborative reinforcement strategy is generated according to the linkage requirement, the collaborative mode and the deployment position are defined, and the overall coordination of the community-level reinforcement scheme and the linkage toughness of the structural system are enhanced.

A rapid deployment and reuseable, multi-level structural system called Metrideck that uses traditional types of walls structures and handrail. Metrideck system includes (a) a set of vertical columns each with a set of attachment features; (b) a set of pre-manufactured beams each said beam with a set of attachment features; (c) a Quicset® for connecting beam and columns; (d) a deck panel with hardware to attach it to the beams and with slots to attach a hanger bracket to connect to the wall structure; (e) a series of curbing that encircles the deck panel perimeter with a set of attachment features; (f) a stair system; and (g) a set of handrail / guardrails wherein the decking system maintains a modular relationship to the mating wall structures, provides multiple platform configurations, uses fewer components, and provides a higher strength to weight ratio compared to other rapid deployment structural systems.

In various embodiments, a room-based design application automatically generates a design for a floor structure of a building. In operation, the room-based design application generates blocks representing portions of the floor structure that are delineated by walls based on a room plan included in a computer-aided design of the building. The room-based design application modifies the blocks based on a spanning length to generate partitions. Each partition represents a different portion of the floor structure that can be spanned by a structural element that has the spanning length in at least one direction. Based on the partitions, the room-based design application determines wall classifications for the walls. The room-based design application generates at least a portion of the design for the floor structure based on the wall classifications and the partitions.

The invention relates to a light high-strength multipurpose bamboo laminated wood container and a manufacturing method thereof. The container is mainly composed of bamboo laminated wood corner posts, side posts, longitudinal side beams, bamboo laminated wood or glass fiber-steel transverse short beams, bamboo laminated wood or glass fiber-steel longitudinal middle beams, corner fitting-glass fiber-steel plate-steel sleeve-bolt integrated connection, bamboo laminated wood inclined struts, glass fiber-steel composite barrels for artificial vehicles, bamboo laminated wood and glass fiber-steel composite barrels for artificial vehicles. The system is composed of glass fiber-steel sleeve bolt connection, glass fiber-steel bolt connection, inclined T-shaped glass fiber-steel filling plate bolt connection, welding connection, door-shaped steel plate integrated welding connection, goods inlet and outlet doors, a K-shaped structure system and peripheral plates. The container is light in dead weight, high in strength, safe and reliable in structure, corrosion-resistant, impact-resistant, fatigue-resistant, freezing-resistant and the like, reduces the use of mineral materials such as steel and aluminum alloy, and is low-carbon and environment-friendly.

The application relates to the technical field of building engineering, in particular to a mixed lateral force resisting structure system of a residential building, which comprises a transverse support system, a vertical support system and a connecting mechanism, the transverse support system comprises frame beams and full-rib prefabricated floors connected with each other, the frame beams are arranged along the outer edges of the full-rib prefabricated floors; the vertical support system comprises flat columns and composite shear walls, the flat columns are connected with each other at the bottom of the full-rib prefabricated floors, and the frame beams and the full-rib prefabricated floors are both connected with the composite shear walls; the connecting mechanism is used for connecting the transverse support system and the vertical support system. The mixed lateral force resisting structure system of the residential building has the technical effects of improving the bearing capacity and stability of the mixed lateral force resisting structure system of the residential building, facilitating construction and wiring and the like.

The invention provides composite spinning equipment for forming rocket pipe type structural parts. The composite spinning equipment comprises a structural system, an operation table, an oil cooler, an oil tank, a control cabinet, a water cooler, a heating system, a gas distribution cabinet, a hydraulic station, an oxygen bottle, a circulating filtering device and a propane gas bottle. The structural system comprises a main spindle box, the main spindle box has active power and can achieve controllable rotation, a closing-in spindle box does not have active power, and when closing-in spinning needs to be conducted, the main spindle box and the closing-in spindle box are connected through a coupler, and controllable rotation of the closing-in spindle box is achieved; the water cooling machine is used for cooling the spinning roller in the spinning process; the heating system can heat the workpiece to realize hot spinning; the circulating filtering device sprays cutting fluid to the workpiece, circulating filtering use of the cutting fluid is achieved, and wet-type forced rotation is achieved. The hot spinning and wet spinning device has the integrated hot spinning and wet spinning effects of strong spinning, close-up common spinning and the like.

The utility model relates to a double-slope multi-section cable string truss structure system, belongs to the technical field of building structures, and solves the problem that in the prior art, a large-span truss structure occupies a large space in the longitudinal direction, so that the clearance height is too low. The device comprises a cable string truss structure and a supporting structure, the cable string truss structure comprises multiple rows of space truss structures arranged in parallel, side cables, middle cables and truss connecting pipes connected among the multiple rows of space truss structures. The lower portion of the space truss structure is fixedly connected with side cables and middle cables, and the middle cables and the side cables are arranged in a staggered mode. The side cables and the space truss structure are supported through a plurality of side cable supporting rods. The middle cable and the space truss structure are supported through a middle cable supporting rod. The double-slope multi-section cable string truss structure system has the effect that the indoor clearance height of a supporting system is increased on the premise that large-span supporting is achieved.

The system can include: a cell frame structure; a robot; and a motion planner. The system can optionally include a set of cell trays and a warehouse management system. The cell frame structure can include and / or define a set of payload storage cells; a set of transfer cells; a set of cell tray storage cells. However, the system can additionally or alternatively include any other suitable set of components. The system functions to automatically manage the storage of payloads within a grid-based structural system.

The present invention relates to a method and system for predicting the buckling load of scour-damaged bridges based on machine learning, and belongs to the field of machine learning and structural engineering technology. The prediction method includes: raw data acquisition, raw data preprocessing, construction of a LightGBM machine learning model, and evaluation and verification of the constructed model using a variety of performance evaluation indicators. The present invention comprehensively considers key variables such as bridge structural parameters and foundation soil physical properties, constructs a large sample database covering a large number of scour combinations, and utilizes an energy-based buckling analysis method for the pier-cap-pile structure system after scour damage to accurately calculate the critical buckling load of the structure as the output target. Combined with an integrated learning algorithm, a multivariate nonlinear mapping relationship is established to replace traditional complex calculations. It has good engineering adaptability and universality, and can be applied to rapid prediction of buckling bearing capacity under different parameter bridges, different foundation forms and complex scour conditions.

A new Super High Tensile Strength Tape (SHTST) which delivers super high performance in strength and low elongation which can be used in a roof reinforcing and attaching system to aid in securing the roofing members and supporting walls to the building's foundation, so as to supplement and unify the roofing assembly and wall sections in resistance to lift-off, failure and destruction in high-wind, seismic and other destructive events. Said SHTST can also be used in applications for automotive and vehicular, for packaging, for industrial uses, for military applications and for any other application where significant reinforcing and unifying resistance to destructive forces is desired.

The utility model relates to the technical field of assembly type buildings, and provides an assembly type laminated slab and beam connecting structure which comprises a laminated slab and a cast-in-place beam which are vertically connected. When the laminated slab is manufactured, the multiple reinforcing ribs are firstly assembled, the multiple steel bar trusses and the multiple stress ribs are assembled after assembly and installation are completed, then concrete is poured on the laminated slab, the reinforcing ribs are used for enhancing the strength and rigidity, and distortion and deformation caused by deformation of the laminated slab and uneven stress are prevented; meanwhile, the reinforcing ribs can enhance the anti-seismic performance and durability of the structure, the steel bar trusses are used for dispersing loads to other structural systems, so that the structure of the laminated slab is stabilized, meanwhile, shear of the laminated surface is increased, stress is balanced through the stress ribs, and therefore the purpose of increasing the rigidity of the laminated slab is achieved; and the problem that the structural stability and the construction safety are affected due to insufficient rigidity of the laminated slab is effectively prevented.

The invention discloses a Grasshopper-based complex curved surface curtain wall modeling method, and relates to the technical field of digital design and construction of buildings, and the method comprises the steps: firstly inputting the geometric dimension, load parameters, thermal expansion coefficient, material attributes and environmental parameters of a curtain wall into a parameterization platform at an input end, and generating an original curtain wall model; performing topological optimization and geometric correction on the original curtain wall model through curved surface reconstruction to obtain a reference curtain wall model; performing grid segmentation on the reference curved surface based on a discrete differential geometry method, and calculating the size of a unit plate; constructing a structural system by utilizing a finite element analysis module and a parameterized platform; according to deformation characteristics of glass plates and installation components, parameterization adjustment is conducted on construction nodes to compensate errors, the planarization size of a unit plate and the sectional size of a frame are optimized, construction data are finally output, multi-parameter digital automatic linkage of the complex curved surface curtain wall from design to construction is achieved, and therefore the modeling precision and efficiency of the complex curtain wall are improved.

The invention relates to a full-life-cycle indoor variable space building system. The full-life-cycle indoor variable space building system comprises a novel structure system and a building space layout. The novel structural system comprises a core tube, steel-concrete composite structural floors are connected to the two sides of the core tube, each steel-concrete composite structural floor is provided with a floor structural unit and a hidden beam frame for supporting the floor structural unit, the hidden beam frames and the floor structural units form an integrated structure by pouring concrete, and the hidden beam frames are connected with the core tube. The hidden beam frame is connected with a plurality of frame supporting columns, and the frame supporting columns are separated from the outer wall and the separating wall. The building space layout comprises the steps that a water utilization space is centrally arranged on one side of a living space, a large-space non-water utilization space is arranged on the other side of the living space, a vestibule backcourtyard and an equipment platform are arranged on the outer side of the outer wall of the centralized water utilization space, and a shared facility tube well is arranged. According to the invention, global variation of the living room space, the water utilization space and the balcony space in the whole life cycle of families and residences is realized.

The invention belongs to the technical field of structural engineering, and discloses a steel sheet pile outer wall-expanded wing type bolt connection steel frame underground support integrated structure which comprises a permanent steel sheet pile outer wall structure unit and a full-bolt ribbed end plate square steel pipe column-H-shaped steel beam expanded wing type connection frame unit. Based on the structural design concepts of pile-wall integration, one-pile multi-purpose and supporting integration, the permanent full-bolt ribbed end plate square steel pipe column-H-shaped steel beam expanded wing type connecting frame unit serves as a bearing unit of an upper building of the underground space and can also serve as a supporting unit in the foundation pit excavation and use stage. The novel underground structure system and the permanent steel sheet pile outer wall structure unit jointly form a permanent supporting system of the foundation pit; the construction efficiency of the underground structure can be greatly improved, the construction period is shortened and the resource investment is reduced by adopting a construction sequence from top to bottom without a temporary supporting structure and full bolt assembly.

The utility model discloses a Larsen steel sheet pile permanent enclosure structure system which comprises reinforcing steel bars which are vertically welded on concave surfaces of the inner surface of a Larsen steel sheet pile at intervals; the battens are vertically arranged on the inner sides of the steel bars in the concave surfaces of the inner surface of the Larsen steel sheet pile, and the battens are connected with the steel bars; the wood formworks are laid on the outer sides of the steel bars in the concave surfaces of the inner surface of the Larsen steel sheet pile, the wood formworks are fixedly arranged on the battens through nails, the wood formworks block the concave surfaces to form hollow cavities, the outer surfaces of the wood formworks and the convex surfaces of the inner surface of the Larsen steel sheet pile are located on the same plane, and the outer surfaces of the wood formworks and the convex surfaces of the inner surface of the Larsen steel sheet pile are located on the same plane. A plane structure is formed on the inner surface of the Larsen steel sheet pile; the waterproof coiled material is laid on the inner surface of the Larsen steel sheet pile; and the drift sand is densely filled in the cavities of the concave surfaces of the inner surface of the Larsen steel sheet pile. The utility model has the advantages of high structural strength, good bearing capacity, good non-deformability, good waterproof performance, short construction period and low cost.

A building apparatus, system, and method are disclosed in which a structural core, with a minimal footprint, provide the backbone for building units that are multiples of the size of the footprint of the structural core with minimal additional support. Such units may be combined repeatedly and in various orientations to create more complex systems. The design, configuration, and assembly process disclosed is for a composite structural system that achieves an occupiable space capture through the use of a small footprint 3-D structural box frame that is strong enough to provide the shear strength for multiples of the depth of the frame base from a foundation anchorage merely equal to the size of the structural box frame base. Thus, each structural box frame solves for its own structural performance, or a combination of structural box frames may combine to solve for the combined structural performance. This strategy reduces the structural footprint relative to total occupiable space capture and reduces the number of building parts required to achieve occupiable space capture, which accelerates and simplifies builds, and reduces the staging area demands of construction.

The invention discloses a construction method of a curved-surface cylindrical cable-membrane composite structure system.The cable-membrane composite structure system is of a curved-surface cylinder structure with the middle concave inwards, a circle of the upper portion of the cylinder is of a steel truss structure, the upper portion of a cable net is connected with the steel truss structure, the cable net comprises a plurality of radial cables and annular cables, and the radial cables and the annular cables are arranged in a crossed mode to form grids; the construction method comprises the following steps that S1, the steel truss structure is installed, and an initial frame is formed; s2, an operation platform and a lifting tool frame are arranged, and a lifting point is set; s3, the radial cable and the lifting tool frame are connected and lifted to be separated from the ground; s4, a cable net lifting and tensioning scheme is determined, specifically, the cable net is lifted to the designed height in a staged mode, annular cables are synchronously installed, and radial cables are symmetrically tensioned in a staged and batched mode; s5, synchronously performing simulation calculation and analysis; and S6, based on the simulation calculation and analysis result, lifting and tensioning of the cable net are conducted, and finally cable net forming is completed. And S7, a membrane structure is installed, and the tension of the cable net is adjusted.

The invention relates to the technical field of ductile structure system analysis and design, and provides a design method of a ductile supporting frame structure and a numerical analysis model based on a beam unit fiber section. By controlling the rigidity ratio of the frame to the support and the section parameter ratio of the connecting piece to the support, the section parameter design limit value of the ductility connecting piece is given, and the ductility of the structure is ensured. Secondly, based on an equivalent stiffness principle, a ductile support bilinear skeleton calculation model considering stiffness degradation is provided, then an existing buckling-restrained support calculation model is improved, and the mechanical behavior of the whole support is simulated by adopting plastic connection units and beam unit fiber sections; and forming a numerical calculation model of the ductile support steel frame structure based on the fiber section of the beam unit. The model can accurately simulate the mechanical characteristics of the overall support and the structural system thereof, the huge workload of multi-time iterative modeling is omitted, the analysis cost is low, and the efficiency and simulation precision are higher.

In order to achieve all the purposes mentioned above and that will emerge from the detailed description below, the present invention is related to a vibration energy damping mechanism (10) having at least one fixing element (20) that can be connected with at least one first structural member (90) and at least one second structural member (100) in order to increase the resistance of structures against events that cause vibrations, such as earthquakes. Accordingly, its novelty is that it comprises at least one plate (30) configured between said at least two fixing elements (20), and in order to increase the load capacity and energy damping capacity of the structural system by increasing the displacements as a result of vibrations, it comprises at least two friction regions (I) having at least one disk (40) providing damping as a result of friction by being positioned between at least two elements that have the degree of freedom to move relative to each other during vibration.

The invention provides a seismic peak response prediction method for a composite damping structure system. The method comprises the following steps: S1, constructing a theoretical model of the composite damping structure system; s2, deducing and correcting key parameters of the composite damping structure system, wherein the key parameters comprise an equivalent period, an equivalent damping ratio and an equivalent damping ratio correction coefficient; and S3, compound damping structure system seismic peak response derivation and nonlinear dynamic time history analysis verification are carried out, wherein peak response comprises peak relative displacement response and peak absolute acceleration response. The provided seismic peak response prediction method for the composite damping structure system does not need the processes of structural modeling, seismic oscillation screening, nonlinear dynamic time history analysis and the like, has a high-precision and efficient response prediction effect, and makes up for the defect that in a design method of a structure based on performance, the nonlinear damping degree is high and prediction is not accurate; the method is different from a'black box 'problem existing in prediction methods such as machine learning and the like, and has principle interpretability.

The invention discloses an H-shaped steel full-bolt assembly suspended dome structure system and a construction method thereof. The H-shaped steel full-bolt assembly suspended dome structure system comprises an upper single-layer latticed shell system, a lower cable supporting system and a support. The upper reticulated shell is formed by splicing a center module unit and an outer ring module unit through high-strength bolts, the module units are connected with H-shaped steel Z-shaped bolt joints through welded hollow balls, and the joints achieve quick positioning of rod pieces and triple bolt connection through Z-shaped cantilever ends. The lower cable support system comprises a full-bolt connection spherical hinge universal adjustable cable support node, hinge joint is achieved through a spherical hinge assembly, the prestress of an annular cable is adjusted through a cable clamp assembly, and a radial cable is connected with adjacent units. The support is in bolted connection with the ring beam base through a Z-shaped cantilever end. During construction, parts are prefabricated in a factory and positioned through full-bolt assembly jig frames on site, assembly is conducted according to the sequence of expanding from the center to the outside, and the jig frames are dismantled after ring cables are tensioned in a graded mode. The structure achieves whole-process non-welding assembly, construction is efficient, green and low-carbon, joint damage is controllable, repairing is convenient and fast, cable force adjustment is accurate, and the structure is suitable for intelligent construction of the large-span space steel structure.

The invention belongs to the technical field of bridge construction, and particularly relates to a steel bridge diagonal bracing node fatigue assessment hot spot stress method based on machine learning. By constructing a hot spot stress concentration coefficient Gaussian regression process proxy model of the steel bridge inclined strut nodes, a mapping relation is established among geometric parameters of the steel bridge inclined strut nodes, welding seam type input variables and hot spot stress concentration coefficient output, so that the hot spot stress of different inclined strut nodes on different steel bridges is quickly determined. And in combination with a hot spot stress S-N curve and a random traffic flow loading method, realizing fatigue performance evaluation of the steel bridge diagonal bracing node. The method is suitable for various steel bridge structure systems including diagonal bracing nodes, including truss girders, box girders, long cantilever combined structures and the like, and has good engineering adaptability and popularization value.

The invention discloses a high-altitude ultra-long and ultra-high steel member installation construction stability control method on a flexible cable net, which comprises the following steps: S1, a radial main beam is hoisted to the flexible cable net, and the lower part of the head end of the radial main beam is connected with a vertical main supporting rod; a plurality of vertical secondary supporting rods are evenly arranged on the bottom side of the radial main beam in the axis direction of the radial main beam at intervals. S2, the radial main beam is gradually lowered, and the tail end of the radial main beam is connected to the inner ring beam through a pin shaft; s3, the adjustable lateral cables connected to the two sides of the vertical main supporting rod in advance are preliminarily pre-pulled downwards, then the single steel component is gradually lowered, the vertical secondary supporting rod and the radial cables are sequentially connected through cable clamps, and the bottom end of the vertical main supporting rod and the inner side annular cable are sequentially connected through cable clamps; and S4, the adjustable lateral cable is connected, the telescopic length is adjusted, and the adjustable lateral cable is tensioned and fixed. The method can ensure that the steel member forms a stable structural system under the support of the cable net, a large amount of measure cost is reduced, and the mounting quality is improved.

The invention provides an inorganic glue and H-shaped steel beam reinforced concrete floor slab and a construction method, relates to the field of existing building reinforcement, and aims to solve the problem of limited bearing capacity improvement caused by reinforcement of a single component of the floor slab at present. The bearing capacity limitation of traditional local reinforcement is broken through, excessive dependence on original floor performance is avoided, reinforced concrete floors, H-shaped steel beams, peripheral beams, columns, walls and other stress components work cooperatively, and a new stable force transmission structure system is formed. The anchoring area in the through hole rigidly connects the H-shaped steel beam with an original floor steel bar node and a concrete base body through a connecting piece, so that effective transmission of loads is ensured; the through hole form with the wide top and the narrow bottom enhances the occlusion force between the anchoring material and the floor, and improves the connection reliability; the carbon fiber cloth above the through holes restrains the floor concrete in the trepanning area, and local strength loss possibly caused by trepanning is made up.

This invention discloses a prefabricated bamboo-concrete composite frame beam-column joint, comprising bamboo fiber tube concrete columns and composite beams. During on-site assembly, an outer sleeve is inserted into the bamboo fiber tube at the joint area, and adhesive is injected for bonding. The bamboo beam and steel joint are then assembled to form the composite beam. Reliable connections between the bamboo fiber tube, the outer sleeve, and the steel joint are achieved using through bolts or single-sided bolts. Finally, concrete is poured into the tubes, and the structure is cured to form the final structure. The prefabricated composite beam-column joint components assembled by this invention are lightweight, high-strength, energy-saving, and emission-reducing. The resulting beam-column joint fully utilizes the material combination effect, minimizing cross-sectional dimensions and material usage while maximizing load-bearing and deformation capacity. On-site assembly requires minimal hoisting equipment and temporary supports, eliminating much of the formwork and finishing work required for the main structure. This achieves a "high-performance, low-cost, and easy-to-construct" composite structural system. The steel joints at the beam ends form a seismic-resistant beam hinge mechanism with strong energy dissipation capacity, ensuring outstanding seismic performance of the frame structure.

The application discloses a kind of based on project performance assembly construction technology system evaluation method, belong to civil engineering project management field.The application solves the problem of poor accuracy caused by subjectivity in the existing assembly construction technology system evaluation method using qualitative evaluation.The application divides assembly construction technology system project into three stages, constructs multiple input-output evaluation index system, collects input and output data of different stages of completed assembly construction project of target structure system;Three-stage super-efficiency EBM model is constructed, and the total performance and construction stage performance of the completed assembly construction project of the target structure system are obtained by using the three-stage super-efficiency EBM model and the collected data;The different assembly construction technology systems used by the target structure system are compared and evaluated according to the total performance and construction stage performance.The application is mainly used for the evaluation of assembly construction technology system.

The application discloses a kind of UHPC connection's double post-tensioning prefabricated prestressed concrete frame structure system, including prefabricated concrete upper column, prefabricated concrete lower column, double post-tensioning prefabricated prestressed concrete composite beam, UHPC node core area and composite slab.The upper longitudinal main reinforcement, lower longitudinal main reinforcement, ordinary steel and post-tensioning prestressed tendon are directly anchored in UHPC node core area.The structure system is not only convenient and fast in field construction, improves component installation efficiency, but also can greatly reduce the anchoring length of steel bar, greatly reduce the amount of stirrup in node core area, avoid crowded steel bar in node core area, and reduce the cross-sectional height of component, reduce self weight, improve component crack resistance and self-recovery performance, thereby improve the seismic performance of overall frame structure.Double post-tensioning design can be reasonably designed according to different span, different load, different seismic intensity and other requirements, reduce cost, meet the use requirements.

The invention discloses a cover-excavation method steel cover plate and a connecting and limiting method thereof, and belongs to the technical field of foundation pit engineering. Aiming at the defects of large vibration, high noise, poor driving comfort, insufficient rigidity, low repeated utilization rate, improper connecting and limiting measures and the like of an existing cover-excavation method cover plate, a vertical support-horizontal support-steel cover plate integrated structure system is constructed, and vertical support is formed by constructing a foundation pit enclosure wall and a stand column pile; a first reinforced concrete support serves as a transverse horizontal support, a section steel longitudinal beam is erected to serve as a longitudinal horizontal support, reliable limiting between steel cover plates and between the plates and the beams is achieved by matching reserved holes and clamping grooves with bolts and clamping section steel, and the flatness and the vibration reduction effect are optimized with assistance of a rubber vibration reduction cushion layer. The steel cover plate adopts standardized H-shaped steel assembly welding and fiber concrete surface layer design, and can be repeatedly used. The problem of vibration noise of the cover plate under dense vehicle load is effectively solved, deformation of the foundation pit is controlled, interference of construction to the surrounding environment and traffic is reduced, the requirements of energy conservation and emission reduction are met, and remarkable environmental protection benefits and economic benefits are achieved.