43 results about "Structural stress" patented technology

The invention discloses a tool structure and method for prolonging the fatigue life of a 35 MPa flaring-free rolling connecting piece. The tool structure comprises a die clamping assembly, a positioning sleeve assembled in the die clamping assembly and a pipe sleeve assembled in the positioning sleeve, and a guide pipe is assembled in the pipe sleeve; the clamping die assembly comprises a first clamping die body and a second clamping die body corresponding to the first clamping die body, and a limiting cavity used for assembling a positioning sleeve is formed in the first clamping die body and the second clamping die body. A tool structure is used for limiting the guide pipe and the pipe sleeve which are connected in a rolling mode and controlling structural deformation, so that structural stress is improved, the problem of fatigue test failure of the 35 MPa high-pressure combined guide pipe is solved, the stress distribution condition of the connecting position is improved, beneficial residual stress of a connecting piece is increased, and the service life of the connecting piece is prolonged. And the fatigue strength of the connecting piece under the bending stress load is improved.

The invention relates to the technical field of weld joint vibration fatigue life evaluation, in particular to a weld joint vibration fatigue life evaluation method based on a simplified modal structure stress method. The method specifically comprises the following steps: establishing a simplified finite element model of a welding structure without welding seam details, and calculating a structural mode of the simplified finite element model; a modal coordinate time history is obtained according to the structural modal, and the modal structural stress at the weld toe is calculated through a linear difference value; superposing the modal coordinate time history and the weld toe modal structure stress to obtain a weld toe structure stress time history; obtaining the change range and cycle index of the structural stress according to the rain flow counting statistics of the structural stress time history at the weld toe; equivalent structure stress is calculated; and calculating by adopting a main S-N curve method to obtain a damage and fatigue evaluation result of the welding seam. The modal structure stress at the weld toe is calculated through the linear difference, weld joint details do not need to be established, the workload of finite element model establishment can be greatly simplified, the modeling complexity is reduced, and the modeling efficiency is improved.

The invention provides a bracket-free arch rib concrete pouring construction method which comprises the following steps: S1, carrying out analogue simulation on a key process before construction, and determining a pre-camber parameter, S2, erecting a tie beam bracket, pouring concrete, installing an arch rib pre-embedded anchor plate, and tensioning a tie beam top and bottom prestressed steel beam, S3, installing a temporary bracket of an arch rib, and erecting an operation platform, S4, symmetrically hoisting arch rib sections, closing of the arch ribs is completed, a second batch of prestressed steel beams are tensioned, and structural stress is stabilized; s5, temporary supports of the arch ribs are dismantled, stress system conversion is achieved, and S6, concrete in the arch ribs is poured in a staged mode, the compactness is ensured, and the problems that a traditional support assembling method has the high requirement for the strength of the arch rib supports and the requirement for the foundation bearing capacity are solved.

The utility model discloses a profile steel enclosing purlin reinforcing component for a PC construction method pile, which comprises a cross beam (2) connected with a profile steel enclosing purlin (1) and a main support rod (3) fixed on the ground, and the main support rod (3) is fixedly connected with the lower end of the profile steel enclosing purlin (1); the rod body of the main supporting rod (3) is provided with an inclined supporting rod connecting seat (4), the end part of the inclined supporting rod connecting seat (4) is connected with inclined supporting rods (5), a transverse straight plate (6) is arranged between the inclined supporting rods (5) on the two sides, and the plate body of the transverse straight plate (6) is provided with a rod body connecting seat (7). The enclosing purlin can be effectively supported and reinforced, structural stress points are dispersed, and the structural strength of the enclosing purlin is improved.

This invention relates to a performance testing method for a high-load-bearing, long-stroke air spring assembly, comprising the following steps: S1, determining the model and operating parameters; S2, installation and alignment; S3, air pressure setting; S4, pre-cycle; S5, stretching the air spring; S6, compressing the air spring; S7, unloading and returning; S8, recording deformation data. Before formally recording data, the performance testing method of this invention performs multiple complete compression and rebound pre-cycles on the air spring. This not only eliminates the initial structural stress relaxation of the air spring bladder and cord layer, improving the repeatability and consistency of stiffness testing, but also identifies hidden damage or assembly defects in the air bladder in advance, avoiding sudden failure during formal testing. Furthermore, it allows the rubber material of the air spring to reach a stable hysteresis working state, simulating the actual pre-service break-in process, making the subsequently measured stiffness parameters closer to the true values ​​of long-term stable operation, and thus making the test data more accurate.

The present invention relates to a steel structure tool type anchor point and an installation and removal method thereof, the anchor point comprises a steel structure box with a top opening design, the box wall of the steel structure box comprises a first side plate arranged on the left and right and a second side plate arranged on the front and back, the box bottom of the steel structure box comprises an upper split bottom plate and a lower split bottom plate thereunder, one side of the upper split bottom plate and one side of the lower split bottom plate are detachably connected to each other by bolts, the other side of the upper split bottom plate and the other side of the lower split bottom plate are respectively movably connected to the first side plates arranged on the left and right, one end of the bolt passes through the upper split bottom plate and the lower split bottom plate in sequence, the other end of the bolt is rotatably connected to the upper surface side plate located at the top of the steel structure box, the top of the steel structure box is also provided with a main beam, and an ear plate for connecting a pull anchor structure is installed on the main beam. Compared with the prior art, the steel structure tool type anchor point proposed by the present invention does not damage the environment, has reliable structural force, is easy to install and remove, and has the advantages of being reusable and economical.

The utility model discloses a bridge expansion device for building a bridge, which comprises a bridge main body, an expansion joint is arranged in the bridge main body, an expansion device main body is arranged at the top of the expansion joint, a reinforcing steel bar ring is arranged at the bottom of the expansion device main body, and reinforcing ribs are arranged in the reinforcing steel bar ring. Mounting plates are arranged on the left side and the right side of the telescopic device body, outer plates are arranged on the inner sides of the mounting plates, steel rings are arranged in the middles of the interiors of the outer plates, inner grooves are formed in the interiors of the outer plates, biting rings are arranged in the inner grooves, and connecting plates are arranged on the inner sides of the biting rings. The embedded connection of the steel rings and the biting rings enhances the strength of the joints, larger stress and deformation can be borne, the bridge body is allowed to freely stretch out and draw back under the conditions of temperature changes, load changes and the like due to the existence of the expansion joints, and therefore the structural stress is reduced, the bridge body is protected, and the situation that the telescopic structure between devices is affected due to dense biting teeth is prevented.

The invention relates to an asymmetric damping box optimal arrangement and design method based on limited construction conditions, which comprises the following steps of: 1, designing an asymmetric damping box occupation, 2, arranging a transition section of the asymmetric damping box, 3, arranging an annular bulkhead of the asymmetric damping box, 4, arranging a radial bulkhead of the asymmetric damping box, and 5, designing an asymmetric damping box. The method comprises the following steps: step 1, arranging asymmetric damping box stiffeners, step 2, arranging asymmetric damping box stiffeners, step 6, arranging asymmetric damping box sawteeth, step 7, arranging asymmetric damping box bulkhead holes, step 8, arranging asymmetric damping box toggle plates, and step 9, optimizing the structure of the asymmetric damping box. According to the damping box designed through the method, the heaving motion performance of the cylindrical floating facility can be improved, the problem that the damping box limits the construction scene of the cylindrical floating facility is solved, and meanwhile the problem that the local structure stress concentration of the connecting position of the damping box and the cylindrical floating facility body is obvious is solved; and the requirements of deep and far sea energy development can be better met.

The application discloses a kind of finite element model construction analysis methods of decompressive craniectomy, specifically related to the field of decompressive craniectomy, comprising: extracting preoperative functional magnetic resonance image and fiber imaging data, establishing functional area atlas containing activation area and fiber direction information;Then according to the consistency of cortical thickness and direction, the anisotropic elastic tensor parameter set of each functional area is constructed, and it is input into the finite element model to establish the joint stress field coupling functional mode response and structural stress.Under the condition of setting multiple bone window configurations, the displacement gradient response of the functional area is simulated and spatially aggregated, and the stability drift sensitive surface is extracted;Finally, based on the response characteristics of the sensitive area, the structural displacement of each decompression scheme is quantitatively evaluated, and the bone window configuration combination that causes the minimum loss of functional stability is output, to provide structural stability support for decompression path planning.

The invention discloses a method and system for determining reasonable acting force of an arch bridge suspender or stand column, and relates to the field of civil (bridge) engineering. The axial compression bearing capacity is calculated, and the set multiple of the axial compression bearing capacity serves as the control horizontal force of the arch crown; calculating the self weight per linear meter in the arc length direction of the arch rib according to the sectional areas of the n points on the arch rib, and multiplying the self weight per linear meter by the self weight per linear meter to obtain a longitudinal self weight function per linear meter of the n points on the arch rib in the x coordinate direction; determining a reasonable acting force function of the suspender or the stand column according to a distribution force form; obtaining a numerical value on the reasonable acting force function, and calculating the reasonable acting force of the suspender or the stand column according to the numerical value. Based on the mechanical equilibrium equation when the axis of the arch rib is pressed, the reasonable acting force of the suspender or the stand column is determined by adopting a mathematical algorithm, the eccentric distance of the pressed section of the arch rib is reduced, the stress of the arch rib is optimized, the use of arch ring materials is reduced, and the economical efficiency of a bridge structure is improved while the reasonable stress of the structure is ensured.

The utility model provides an in-beam steering gear for a pre-tensioned broken line prestress wide-web T-shaped beam, which comprises a plurality of positioning foundation supports, a prestress rib limiting system and rigidity reinforcing connecting rods, the two ends of the prestress rib limiting system are fixedly connected with the positioning foundation supports, the rigidity reinforcing connecting rods are arranged below the prestress rib limiting system in the same direction, and the rigidity reinforcing connecting rods are fixedly connected with the positioning foundation supports. The two ends of the rigidity reinforcing connecting rod are fixedly connected with the positioning foundation support. The steering gear has the advantages that the reinforcing connecting rod is arranged, and the gasket assembly is arranged on the main connecting rod, so that the overall structural stress performance of the steering gear is remarkably enhanced, and the steering gear can bear a large amount of load force generated when a steel strand steers in the construction process; therefore, the stability of the whole construction process and the integrity of the structure are ensured. In addition, construction steps can be simplified, construction time is shortened, construction difficulty is lowered, and constructors can complete operation more efficiently.

The invention belongs to the technical field of retaining walls, and particularly relates to a reinforced gravity type retaining wall anti-seismic structure which comprises a first hinge plate, a shaft connecting end is arranged on the surface of one side of the first hinge plate, the first hinge plate is movably connected with a second hinge plate through the shaft connecting end at the tail, and the same shaft connecting end is arranged on the surface of one side of the second hinge plate. The first hinge plate and the second hinge plate are connected end to end, the surface of the first hinge plate and the surface of the second hinge plate are fixedly provided with bottom partition panels through bolts, and through grooves are formed in the surfaces of the bottom partition panels; through a multi-stage energy buffering mechanism of the arc-shaped elastic plate, the damping spring, the inner cylinder assembly and the rubber bottom ring, layered absorption and dissipation of earthquake energy are achieved, impact of vibration on the structure is weakened, and compared with a traditional structure, the load transmission efficiency under the earthquake action can be effectively reduced, structural stress concentration is reduced, and the service life of the structure is prolonged. The anti-sliding and anti-overturning capacities of the retaining wall in a medium-high-intensity earthquake are improved, and the structural core safety is guaranteed.

The invention discloses a forked steel box arch rib and a construction method thereof, comprising a first single-limb arch rib, a second single-limb arch rib and a combined arch rib, wherein a gap is arranged between the first end of the first single-limb arch rib and the first end of the second single-limb arch rib; a tiny gap of no more than 6 cm is arranged between the second end of the first single-limb arch rib and the second end of the second single-limb arch rib, and both are fixedly connected to the first end of the combined arch rib, that is, the first single-limb arch rib, the second single-limb arch rib and the combined arch rib form a "human"-shaped structure; the invention adopts the form of butt welding of two inner webs and one middle web, thereby realizing effective transmission of web force, maximally ensuring the full-length continuity of various types of plates of the forked steel box arch rib, the forked point connection structure does not need to specially arrange local stiffening plates, thus reducing the number of welds, simplifying the construction steps, reducing the construction difficulty, and realizing the landscape effect of two steel box arch ribs being completely tangent and combined into a single-limb steel box arch rib while satisfying the structural stress.

The present invention provides a water-stopping and force-transmitting structure for stepped joints. The structure comprises a left water-stopping and force-transmitting component and a right water-stopping and force-transmitting component, wherein the left and right water-stopping and force-transmitting components are connected in a concave-convex manner. The present invention can simultaneously achieve water-stopping and force-transmitting functions, and can improve the structural stress-bearing performance of the joint.

The present application relates to a kind of nuclear power plant small branch pipe welding joint fatigue life curve establishment method, device, storage medium and electronic equipment, comprising: determining to be analyzed sample;Determine the first natural frequency of to be analyzed sample;To be analyzed sample is carried out structural excitation and alternating stress control and structural stress calculation, determine the fatigue life of to be analyzed sample;Equivalent structural stress of to be analyzed sample is obtained;Equivalent structural stress and fatigue life are analyzed based on, obtain the equivalent structural stress and fatigue life relationship of to be analyzed test;According to equivalent structural stress and fatigue life relationship carries out curve fitting, obtains the structural stress fatigue life curve of to be analyzed sample.The present application carries out analysis calculation to welding joint, with good adaptability, improve the scientific nature, accuracy of small branch pipe weld vibration stress reliability evaluation result, provide basis for reasonable arrangement maintenance plan of power plant, avoid unnecessary excessive maintenance to improve economy.

The invention relates to a tank container with a split type skirt, and solves the technical problems that an existing straight barrel type skirt is large in dead weight, large in assembly difficulty, complex in structure, not beneficial to load transmission, poor in structural stress condition and prone to stress concentration and fatigue. The device comprises a frame, a tank body and a split skirt for connecting the frame and the tank body, the end frames of the framework are formed by alternately enclosing cross beams and corner columns and are connected through corner fittings; inclined struts are arranged in the end frames; the split type skirt is of an annular structure with a notch, the small-diameter end of the split type skirt is connected with the peripheral face of one end of the tank body, and the large-diameter end of the split type skirt is connected with the inclined strut or the corner column. By means of the structure, transmission of longitudinal force is more direct, and the stress condition is obviously improved. In addition, the complexity of the connecting structure is reduced, the overall self weight is reduced, the safety of the whole machine is improved, meanwhile, light weight is achieved, and the economical efficiency is further improved.

The present application relates to the technical field of weld vibration fatigue life evaluation, and particularly relates to a weld vibration fatigue life evaluation method based on a simplified modal structure stress method. Specifically as follows: a simplified finite element model of a welded structure not containing weld details is established, and the structural modal of the simplified finite element model is calculated; the modal coordinate time history is obtained according to the structural modal, and the modal structural stress at the weld toe is calculated through linear difference; the modal coordinate time history and the modal structural stress at the weld toe are superimposed to obtain the structural stress time history at the weld toe; the structural stress change range and the cycle number are obtained through rain flow counting statistics according to the structural stress time history at the weld toe; the equivalent structural stress is calculated; and the damage and fatigue evaluation results of the weld are obtained by using the main S-N curve method. The modal structural stress at the weld toe is calculated through linear difference, the work load of establishing the finite element model can be greatly simplified without establishing the weld details, the modeling complexity is reduced, and the modeling efficiency is improved.

The invention relates to a stiff structure split socket type steel bar positioning device, and relates to the technical field of building construction.The stiff structure is internally provided with a stiff column and a longitudinal bar, the steel bar positioning device comprises at least two positioning pieces, the end of each positioning piece can be in butt joint with the end of the other positioning piece, and the end of each positioning piece can be in butt joint with the end of the other positioning piece; the positioning piece is provided with a positioning groove for positioning the longitudinal bar, the limiting pieces are oppositely arranged on the positioning piece, the limiting pieces are connected with the stiff column, the limiting pieces are arranged on the stiff column to be connected with the positioning piece, the positioning groove in the positioning piece can be used for primarily positioning the longitudinal bar, and the positioning piece is arranged on the stiff column to be connected with the stiff column. The method has the advantages that the longitudinal bars are clamped and positioned for the second time, then the positioning pieces are close to the limiting pieces, so that the longitudinal bars are clamped and positioned for the second time, the positions of the longitudinal bars are fixed, the situation of position deviation of the longitudinal bars after construction is avoided, the construction and positioning distances of the longitudinal bars are consistent, and the structural stress is enhanced; and the longitudinal bar positioning efficiency and accuracy are greatly improved.

The invention discloses a quick stress assessment method for a bogie frame angle structure based on response surface model adaptation, and relates to the technical field of engineering hoisting machinery. The technical problem that the stress of the angular structure of the bogie frame cannot be quickly calculated is solved. The method comprises the steps that a trolley frame finite element model is established, and stress influence key parameters are analyzed and determined based on trolley frame angle form structure sensitivity; performing response surface (RSM) method test design based on the key parameters, extracting key parameter sample data, and constructing a sample matrix; a key parameter and stress mapping relation is obtained based on the response surface model, and a single factor-stress and multi-factor-stress agent model is established; and a single-factor-stress agent model and a sample matrix are used for correcting a multi-factor-stress agent model, so that the accuracy of the model is improved, and rapid and accurate evaluation of the structural stress is realized.

The application discloses a circular mechanical connecting piece for a concrete member, which comprises a foundation pit guard plate, a side pulling piece, a circular connecting piece, a straight pulling piece, a middle connecting piece, a middle pulling piece and a reinforcing bar connecting piece, the foundation pit guard plate is composed of four sides to form a fence shape, a plurality of sinking pulling holes are formed through the outer side of the foundation pit guard plate, and matching inclined surfaces are formed on opposite sides of the foundation pit guard plate, the side pulling piece comprises a basket bolt piece; the hollow ring structure of the annular pipe piece makes the stress relatively stable, the inner reinforcing rib on the inner side is used for increasing the structural stress intensity, the side auxiliary hole and the cross pipe piece are used for making the annular pipe piece structure stress reduction, the key point position is provided with an opening to make the stress relatively stable, the structure action force is indirectly increased, a plurality of stable positions and connecting point positions are provided for the connection of the structural piece, the relative stability of the structure is ensured, and the concrete connection stress point position is increased, so that the relative stability of the structure is ensured.

The invention provides a fatigue life prediction method considering residual stress after welding and repair welding, and relates to the technical field of welding. Comprising the steps that finite element software is used for calculating the transverse residual stress of a weld toe in the welding and repair welding process, and the transverse residual stress of the weld toe is extracted; performing linearization processing on the extracted transverse residual stress of the weld toe part according to the BS7910 standard so as to calculate average stress; the average stress is incorporated into calculation of a fatigue load, and an optimized stress ratio is obtained; calculating membrane stress and bending stress of the welding joint; calculating according to the membrane stress and the bending stress to obtain a structural stress and bending ratio; calculating equivalent structural stress by optimizing a dimensionless function of the stress ratio, the structural stress and the bending ratio; and predicting the fatigue life according to the equivalent structural stress to obtain a life prediction result. The problem of low accuracy of life prediction of the fatigue test piece in the prior art is solved.

The application discloses a large-span net shell step-by-step lifting method based on flexible reinforcement, which comprises the following steps: assembling a first net shell in a middle section of a large-span net shell and second net shells at two ends of the first net shell on the ground, arranging a ground support device and a temporary lifting support, lifting the first net shell first, simultaneously lifting the first net shell and the second net shells to splice a third net shell, and adopting a flexible reinforcement mode to ensure that structural stress and deformation in the lifting process are controlled within a safe range. That is, the application adopts a synchronous integral lifting method of ground assembly, multi-point synchronous lifting, flexible reinforcement and high-altitude rod supplementing, precisely controls the deflection, ensures that the structural stress and deformation in the lifting process are controlled within a safe range, and lays a foundation for precise butt joint of the net shell when being lifted into position.

The utility model provides an anti-fatigue pin connecting structure. The anti-fatigue pin connecting structure comprises a reinforcing pin and a special-shaped nut. The surface of the reinforced pin is smooth and is provided with a high-performance coating; the reinforcing pin comprises a pin head and a pin body; the diameter of the nail body is gradually reduced from the joint of the nail head to form a streamline surface; an external thread is arranged at the tail part of the nail body and is in threaded connection with the special-shaped nut; a hole is formed in the connecting piece and used for a pin body of the reinforcing pin to penetrate through. The structure stress concentration phenomenon is relieved, the anti-fatigue performance of the pin is improved, and the service life of the pin is prolonged.

The invention discloses a beam penetrating device for a large-axial-force vertical supporting structure, and belongs to the technical field of engineering structure design. The problems that an existing beam penetrating device is complex in connecting structure, high in manufacturing cost, large in occupied space, poor in axial force transmission path and low in structural stress efficiency are solved. The gusset plate penetrates through the web plate to be fixedly inserted in the beam and is arranged in the length direction of the vertical supporting structure, the four in-beam stiffening rib plates are fixedly connected to the surfaces of the two sides of the gusset plate in pairs, and the two ends of each in-beam stiffening rib plate are fixedly connected with the wing plates. The gusset plate rib plates are welded to the gusset plate, one gusset plate rib plate is arranged in the direction of each extension line of each in-beam stiffening rib plate, and the vertical supporting structure is fixedly connected to the gusset plate rib plates through the first connecting clamping plates. The gusset plates, the in-beam stiffening rib plates and the gusset plate rib plates are arranged in the inclined direction perpendicular to the supporting structure, the transmission path of axial force is optimized, force transmission is more direct, and the stress efficiency and stability of the structure are improved.

The invention discloses a finite element model construction analysis method for osteoclavicular decompression, and particularly relates to the field of osteoclavicular decompression, which comprises the following steps: extracting preoperative functional magnetic resonance image and fiber imaging data, and establishing a functional area map containing activation area and fiber trend information; then, an anisotropic elastic tensor parameter set of each functional region is constructed according to the thickness and direction consistency of the cortex, the anisotropic elastic tensor parameter set is input into the finite element model, and a combined stress field with coupled functional modal response and structural stress is established; under the condition of setting a plurality of bone window configurations, performing simulation and spatial aggregation on the displacement gradient response of the functional region, and extracting a stability drift sensitive curved surface; and finally, on the basis of response characteristics of the sensitive area, performing structural offset quantitative evaluation on each decompression scheme, outputting a bone window configuration combination causing the minimum functional stability loss, and providing structural stability support for decompression path planning.

The invention provides a three-type fracture grid insensitive strain energy density calculation method which comprises the following steps: S1, obtaining the size of a pipe joint subjected to three-type fracture, and obtaining basic parameters of a stress field analytical solution based on the size of the pipe joint subjected to three-type fracture; s2, performing finite element calculation to obtain a traction-force-based structural stress which is insensitive to a use grid; s3, calculating a first undetermined coefficient c and a second undetermined coefficient d based on the structural stress; s4, calculating a stress component of the notch based on the first undetermined coefficient c and the second undetermined coefficient d to obtain an analytical solution of a stress field; and S5, sequentially solving a notch strain field and a strain energy density field based on the analytical solution of the stress field, and finally obtaining the strain energy density. The invention provides a solving method of a stress field of a sharp V-shaped notch for describing structural stress based on traction force under type III fracture.

The utility model relates to the technical field of crane stress detection, and discloses a crane fly jib structure stress detection device, which comprises a fly jib main body, the top of the fly jib main body is fixedly connected with a fixed patch, the top of the fixed patch is fixedly connected with a strain gauge, the top of the fly jib main body is fixedly connected with a waterproof shell, and the top of the waterproof shell is fixedly connected with an elastic piece. And one side of the strain gauge is fixedly connected with a waterproof line, the other end of the waterproof line is fixedly connected with a strain testing machine, the other side of the top of the auxiliary arm body is fixedly connected with a base, and a groove is formed in the top of the base. According to the utility model, the clamping block is moved out of the groove by pulling the pull rod, so that the strain testing machine is placed along the inner wall of the groove, and then the pull rod is loosened to push the linkage slide block to move under the action of the spring, thereby driving the clamping block to move, namely enabling the clamping block to move into the groove, and fixing the strain testing machine. Therefore, a worker can conveniently carry out a structural stress test.

The utility model relates to the technical field of open caisson construction, in particular to a connecting joint of a cylinder wall and a scaffold, embedded parts are arranged on the cylinder wall at intervals, each embedded part comprises an embedded plate, an anchor bar is arranged on one side of each embedded plate, a vertical connecting sleeve is arranged on the other side of each embedded plate, the embedded plates and the anchor bars are embedded in the cylinder wall, and the connecting sleeves are connected with the embedded plates. The side, provided with the connecting sleeve, of the embedded plate is flush with the outer side of the cylinder wall, and the connecting sleeve is exposed out of the cylinder wall. One end of the tie rod is connected to the scaffold, and the other end of the tie rod is inserted into the connecting sleeve; the connection between the cylinder wall and the scaffold is flexible connection, so that a flexible integral stable system is formed, the influence of sinking of the cylinder wall is avoided, the structural stress is reasonable, and the mounting and the dismounting are convenient; the connecting structure is rapid in construction, convenient to operate, simple and easy to implement; the device is easy to manufacture, local materials can be used, and the manufacturing cost is low; and the device can be repeatedly used, is environment-friendly and can effectively reduce the construction cost.

The present invention discloses a method, system and medium for determining the parameters of the joints of a lateral connection maintenance system of a grid; it relates to the technical field of building structure design; by constructing a finite element model and conducting multidisciplinary simulation analysis, it is possible to comprehensively consider factors such as structural stress, material properties, and construction errors, accurately determine the width and size of vertical joints, and avoid problems caused by joints that are too wide or too narrow; by combining multidisciplinary simulation analysis such as structural mechanics, acoustics, and airflow vibration, it is ensured that the design of the vertical joints not only meets the structural stress amplitude requirements, but also optimizes the sound insulation performance and reduces the impact of vibration; by adjusting the basic parameters of the vertical joints, the force distribution of the steel keel and the concrete side panels is optimized, and the overall stiffness, stability and durability of the structure are improved; thus achieving multi-objective optimization, providing a scientific design basis, and reducing reliance on empirical formulas.

The present invention belongs to the technical field of structural design and strength testing, and particularly relates to a method for evaluating the stress magnitude at the structural stress focus point on a structural member by superimposing the loads received by multiple regions respectively. When it is necessary to track the load conditions of any structural stress focus point inside the structural member during the entire life cycle, the structural member is divided into a finite number of measurement regions, and then the contribution amount of the load condition of each measurement region to the stress value at the structural stress focus point is measured, and the contribution amounts of all measurement regions are superimposed to evaluate the load condition at the structural stress focus point inside the structural member. The present invention is scientific and reasonable, easy to operate, can efficiently and quickly estimate the total stress value at each structural stress focus point, and realizes structural load monitoring during the entire life cycle of the airframe.