72 results about "Large earthquakes" patented technology

The invention discloses a method for automatically inverting seismic slip distribution based on deep learning. The method comprises the following steps: collecting random slip distribution corresponding to different seismic events and synthesized three-component seismic HR-GNSS waveform data, and preprocessing to obtain a sample group; building a SlipNet neural network based on a Transform-CNN model, and carrying out the training through the sample group; and inputting to-be-processed three-component seismic HR-GNSS waveform data into the trained SlipNet neural network, and generating a corresponding inverted seismic fracture area binary distribution matrix and an inverted seismic fracture slippage distribution matrix. The method solves the problem that a traditional seismic slip inversion method is low in calculation efficiency and lacks physical constraints due to single dependence on seismic waves or deformation data, and is difficult to meet the requirements of complex seismic source characterization. The method can be applied to three-component seismic HR-GNSS waveform data of large earthquakes of different types and different magnitudes.

The utility model relates to an enlarged type metal composite viscoelastic damper. The bottom of a metal damper is fixedly connected with an enlarged type viscoelastic damper. The metal damper comprises a T-shaped core plate, L-shaped restraining plates are fixedly connected to the two opposite sides of the T-shaped core plate in the vertical direction, friction areas are arranged between the tops, located on the vertical plane, of the L-shaped restraining plates and the T-shaped core plate, fixing areas are arranged between the bottoms of the L-shaped restraining plates and the T-shaped core plate, and energy dissipation webs are arranged on the portions, between the fixing areas and the friction areas, of the T-shaped core plate. The amplified viscoelastic damper comprises an upper connecting plate, an amplifying lever is hinged to the lower portion of the upper connecting plate, an inner steel plate is hinged to the lower portion of the amplifying lever, the inner steel plate is connected with an outer steel plate through a viscoelastic layer, and the outer steel plate is hinged to the amplifying lever through a fulcrum shaft. The defects of a metal damper can be overcome under small earthquakes, good energy consumption is achieved, the amplifying damper can be protected against excessive displacement and failure under large earthquakes, the damper consumes energy in a multi-stage mode, and the anti-seismic performance of the structure is improved. The components are connected through bolts, are highly assembled and are convenient to replace.

The invention discloses an urban agglomeration anti-seismic damage prediction method and system based on an unmanned aerial vehicle technology and a deep learning model. The method comprises the following steps: constructing a typical building multi-angle aerial image database and a building earthquake damage database under different load coupling effects; training an urban building group identification model based on the aerial photo database to identify the type, geometry and texture information of the building; constructing and training horizontal and vertical seismic oscillation amplification coefficient prediction models for correcting seismic oscillation intensities under different topographic conditions; a typical building earthquake damage prediction model is constructed and trained, and the building damage grade is predicted in combination with the corrected earthquake vibration intensity; and finally, realizing three-dimensional visualization of the damage condition of the urban building group through a damage grade imaging module. According to the method, the problems of inaccurate urban building group modeling information, large earthquake damage analysis workload and low precision in the prior art are solved, and a scientific basis is provided for construction and evaluation of tough cities.

The invention discloses a multi-stage assembly type viscoelasticity-metal toughness damper and a vibration reduction method, and belongs to the technical field of engineering structure vibration reduction. The damper comprises a viscoelastic damper unit, a metal damper unit and an SMA self-resetting unit. The viscoelastic damper unit is composed of a constraint steel plate and a viscoelastic material layer which are laminated, and the two ends of the viscoelastic damper unit are connected with the first connecting plate and the second connecting plate correspondingly. The metal damper unit comprises outer restraining plates arranged on the two sides of the viscoelastic unit and metal energy dissipation webs connected between the outer restraining plates and the connecting plates. The SMA self-resetting unit comprises a force transmission steel plate, a stress steel plate and an SMA component. According to the damper, the viscous-elastic material is used for shearing and dissipating energy under small shock or wind vibration, the SMA component provides reset force, and the metal web keeps elasticity; the metal webs conduct buckling energy dissipation under medium earthquakes or large earthquakes and work in cooperation with the viscoelastic units and the SMA units, the energy dissipation capacity is remarkably improved, and residual deformation is controlled. The device has the advantages of multi-stage collaborative energy consumption, good self-resetting performance, assembling capability and easiness in maintenance.

The invention discloses a real-time fracture characteristic parameter estimation method based on active fault data, and belongs to the technical field of earthquake early warning. The method comprises the steps of receiving and processing strong vibration data in real time; carrying out identification and binarization processing on a fracture near-field area of the observation seismic oscillation field; constructing a general fault fracture template library; dynamically generating a specific fault fracture template library in real time; virtual stations are introduced into a station network sparse area and an edge area, and an observation blind area is complemented through weighted fusion of an actual observation value and a GMPE predicted value; performing correlation matching on the real-time strong vibration observation data and a fault fracture template, and searching an optimal template; and outputting the current fault fracture characteristic parameters based on the optimal matching template. According to the method, the existing active fault database is adopted to dynamically generate the fracture template to process the known fault fracture caused by the active fault, and the universal template is utilized to process the unknown and hidden fault fractures, so that the accuracy of real-time estimation of the seismic motion field in the great earthquake fracture process is remarkably improved.

This invention discloses a shock-absorbing and pressure-reducing permeable concrete pile reinforced with recycled tires and its construction process. The pile structure comprises a pile body formed by vertically connecting several precast permeable concrete columns; compressible rubber blocks containing permeable holes and ball joints are fixed between adjacent permeable concrete columns; a layer of non-woven fabric is wrapped around the permeable concrete pile to prevent soil from clogging the concrete holes; and a ring-shaped mesh skeleton structure made of recycled tire strips is used to wrap and fix the non-woven fabric around the pile. This invention, by comprehensively utilizing the permeable concrete columns, the ring-shaped mesh skeleton structure, and the compressible rubber blocks containing permeable holes and ball joints, can achieve pile stability under small seismic loads, prevent pile breakage under large seismic loads, and allow the pile to quickly return to its original position after the seismic load disappears, thus ensuring a comprehensive application effect of "unmoved by small earthquakes, unyielding in large earthquakes, and self-repairing after earthquakes."

The application is suitable for the technical field of structure engineering, and provides a structure adaptive limiting protection device.The device comprises: a support fixed on a lower end surface of a structure; a yoke with a vertical slot with an upper opening, one side of the yoke being fixed on an upper end surface of the structure through a connecting rod; the upper end surface of the structure is a lower side surface of a bridge beam body, and the lower end surface of the structure is an upper side surface of a bridge pier; or, the upper end surface of the structure and the lower end surface of the structure are upper and lower side surfaces of a structure for limiting in cooperation with an isolation layer in a building structure; a locking structure fixed on the upper end surface of the structure; a rotating disc and a disc shell, the top of the disc shell being provided with an opening corresponding to the position of the locking structure, the rotating disc being provided with a radial slot; an inner sliding block and an outer sliding block, the inner sliding block being connected with the radial slot through an extensible mechanism and being capable of sliding in the radial slot, the outer sliding block being rotatably connected with the inner sliding block and being capable of sliding in the vertical slot.The application can realize the dual functions of small displacement isolation without interference and large earthquake adaptive self-locking.

This invention relates to the field of vibration control technology for civil engineering structures. It discloses a triaxial magnetorheological quasi-zero stiffness intelligent vibration isolation bearing for large-span spatial structures and its control method. The bearing includes a top plate and a bottom plate. A middle plate is fixed to the bottom of the horizontally stacked magnetorheological elastomer vibration isolation / vibration unit. A vertical magnetorheological quasi-zero stiffness vibration isolation / vibration unit is fixed to the bottom plate and slidably connected to the inner side of the middle plate. The control method uses sensors to collect the structural response in real time, identifying three operating conditions: high-frequency micro-vibration, low-frequency moderate vibration, and large earthquake safety. It automatically switches control modes to achieve coordinated adaptive control of vertical damping and horizontal stiffness and damping. This invention combines high static load-bearing capacity with low dynamic stiffness, enabling triaxial decoupling and multi-mode intelligent coordinated control, and is suitable for broadband vibration control of roof supports for large-span spatial structures.

The application discloses a novel assembled steel plate composite damping wall considering multistage stress and a design method, wherein the novel assembled steel plate composite damping wall is assembled by connecting steel plates, dumbbell-shaped weakened steel plates, force transmission steel plates welded with studs, concrete plates, L-shaped connecting angle steels and high-strength bolts. The novel assembled steel plate composite damping wall only bears the dumbbell-shaped weakened steel plates under normal use conditions and under small earthquakes, and the concrete plates provide out-of-plane constraints for the novel assembled steel plate composite damping wall; under medium earthquakes and large earthquakes, the external concrete plates start to bear loads, so that the assembled damping wall has sufficient rigidity and bearing capacity. The multistage stress characteristics can guarantee that the structure has good lateral resistance and bearing performance in different loading stages, fully play the mechanical performance of each component, and delay the damage of the structure under the action of earthquakes.

The present application relates to the technical field of bridge, in particular to a bridge anti-seismic method and structure with multi-stage ordered reset energy dissipation, which can activate each stage of anti-seismic mechanism according to the expected design order under a once-in-a-lifetime earthquake, and can ensure that the bridge adapts to different earthquakes with different performance states, has flexible isolation and self-resetting function under small earthquakes, can pass through directly without repair after the earthquake; has the function of sliding isolation and energy dissipation under medium earthquakes, the main components are not damaged after the earthquake, and only the T-beam reset and the quick replacement of the mild steel energy dissipation element are needed to restore the traffic; has the function of automatic anti-falling beam under a large earthquake, and changes the force transmission path of the bridge structure; under a once-in-a-lifetime earthquake, the bridge is converted from the isolation mode to the ductility mode, the plastic hinge of the pier column is used for hysteresis energy dissipation to resist the earthquake, the seismic potential of the bridge structure is excavated to the greatest extent, and the life safety is ensured.

The application discloses a combined energy dissipation and shock absorption device for high-speed railway bridges, which is arranged symmetrically on both sides of a seismic isolation bearing between a prefabricated pier column and a prefabricated bridge, and is connected with the prefabricated bridge and the prefabricated pier column through mounting members at the bottom and the top. The device comprises multiple groups of connecting members which are uniformly arranged between the mounting members, and a viscoelastic energy dissipation unit, a bending energy dissipation unit and a limiting shear plate energy dissipation unit which are sequentially arranged between adjacent connecting members from top to bottom. The adjacent connecting members are connected and fixed with the mounting members at the top of the prefabricated pier column and the lower side of the prefabricated bridge body respectively only through the bottom surface and the top surface. In a normal state, the seismic isolation bearing, the viscoelastic energy dissipation unit and the bending energy dissipation unit provide small rigidity to resist variable loads such as wind load and temperature effect, and the shear plate energy dissipation unit does not work. In a small earthquake, the viscoelastic energy dissipation unit and the bending energy dissipation unit provide small rigidity to resist horizontal seismic action. In a large earthquake, the limiting shear plate energy dissipation unit provides large rigidity to resist horizontal seismic action.

The application discloses a semi-hinged concrete column foot joint and a design method, and belongs to the technical field of building structure engineering, and solves the problems of large inclination stiffness and large earthquake action of the existing vehicle base. The column foot joint comprises a concrete base, a reinforced concrete column is arranged on the concrete base, a profile steel is arranged in the reinforced concrete column, the lower end of the profile steel is inserted into the concrete base, the upper end of the profile steel is flush with the bottom of an upper layer beam, a connecting bottom plate is arranged at the bottom of the profile steel, the connecting bottom plate is connected with the concrete base through anchor bolts embedded in the concrete base, a plurality of column foot longitudinal reinforcements and continuous composite rectangular spiral hoops are arranged in the column foot section of the reinforced concrete column, and a plurality of column top longitudinal reinforcements and composite hoops are arranged in the column top section of the reinforced concrete column. The semi-hinged concrete column foot joint and the design method effectively reduce the earthquake action and large chassis effect of the skirt building of the subway vehicle base.

The application belongs to the technical field of structural engineering and relates to a damage deformation controllable composite column-concrete beam fabricated node and a mounting method, which comprises a steel pipe concrete composite column, a prefabricated concrete beam and a self-resetting energy dissipation structure. The surface of the composite column is provided with a connecting plate and a second hinged plate, and the end of the prefabricated concrete beam is provided with an H-shaped steel and a second hinged plate, which are hinged through a pin shaft. A friction energy dissipation component is arranged between the first and second hinged plates and is used for friction energy dissipation under small earthquakes. The two ends of a plastic energy dissipation plate and a super-elastic reset plate are respectively detachably connected with the connecting plate and the H-shaped steel and are respectively used for plastic energy dissipation under medium earthquakes and super-elastic reset after earthquakes. The node is cooperated with multi-stage energy dissipation and self-resetting, realizes no damage under small earthquakes, repairable under medium earthquakes and no collapse under large earthquakes, is easy to replace after earthquakes and is suitable for high-intensity region fabricated buildings.

To provide a shelter for protecting a body only at the time of a big earthquake without becoming an obstacle at the time of daily life.SOLUTION: As a horizontal metal thin plate, a long side 11 of a rectangular main plate 1 is set as a longitudinal direction, and a short side 12 is set as a width direction. Both side ends in the longitudinal direction are provided with end part raising parts 2, 2 formed of the same material as the rectangular main plate 1 and held at the same angle in a downward inclined shape toward the outside with the horizontal line of the metallic thin plate as a reference, and a tension string-like object 4 is tied between both opposed end part raising parts 2, 2. The rectangular main plate 1 is formed in a flat shape in an ordinary time, and in a large earthquake, the tension string-like object 4 is properly shortened by tensile force by human power or motive power, and the rectangular main plate 1 is formed and fixed in a curved shape in the whole longitudinal direction, and the end part raising parts 2 and 2 are formed in a vertical shape, and can be formed as the body shelter.SELECTED DRAWING: Figure 1

The utility model discloses a damping type radial spherical plain bearing node which comprises a support base plate, a first lug plate and a second lug plate are fixedly installed at the two ends of the support base plate respectively, and a pin shaft is installed between the first lug plate and the second lug plate. A viscous damping mechanism, a bearing mechanism, a third lug plate and a spring mechanism are sequentially and tightly arranged on the pin shaft in a sleeving manner; the viscous damping mechanism is arranged between the first lug plate and the third lug plate, the bearing mechanism is rotationally installed in a lug hole of the third lug plate, and the spring mechanism is arranged between the second lug plate and the third lug plate. The shock absorption type radial spherical plain bearing node has the advantages of universal rotation, clear stress, simplicity in manufacturing and mounting, small node size and the like while solving the problems of temperature stress and earthquake action, and solves the problems of large temperature stress, large earthquake response, large node size and the like of the existing super-long and large-span space steel structure; wide popularization and application prospects are realized.

The application discloses a large-span arch bridge grading damping mechanism and a grading damping method. The large-span arch bridge grading damping mechanism is detachably installed between a main beam and a pier, a support is installed between the main beam and the pier, a gap is formed between the main beam and the pier, the large-span arch bridge grading damping mechanism is located in the gap, and two ends of the large-span arch bridge grading damping mechanism are detachably installed at the bottom of the main beam and the top of the pier. The large-span arch bridge grading damping mechanism comprises a damper and damping material, and the damping material is placed in a container. The container is a barrel-shaped structure with an opening at one end. Correspondingly, the opening faces the top of the pier or the bottom of the main beam. The damper is oppositely arranged with the container, and one end of the damper is correspondingly detachably installed at the top of the pier or the bottom of the main beam. The other end of the damper extends into the damping material through the opening. The large-span arch bridge grading damping mechanism disclosed by the application can realize three-stage damping energy dissipation, is easy to repair and reusable after a small earthquake, is easy to disassemble and replace after a large earthquake, and has the advantages of simple structure and convenient installation.

The invention discloses an anti-falling connecting device for an assembly type stair and a mounting platform, and aims to provide an anti-falling connecting device for an assembly type stair and a mounting platform, which can enable a connecting node of the assembly type stair and the mounting platform to have sliding capacity under the condition that normal use of the assembly type stair is not influenced. Therefore, the adverse effects of earthquake or wind load and the like on the connecting node of the fabricated stair and the mounting platform and a building main body structure are effectively reduced; and meanwhile, the anti-falling connecting device further has the function of preventing the stairs from falling off under the action of a large earthquake. The connecting device comprises a main connecting assembly and an auxiliary connecting assembly. The main connecting assembly comprises a connector cylinder part which is pre-buried in the assembly type stair; the fixed outer cylinder is pre-embedded in a platform beam of the mounting platform; the sliding inner cylinder is arranged in the fixed outer cylinder in a sliding mode, and the sliding inner cylinder is inserted into the connector cylinder piece under the action of the end spring; the auxiliary connecting assembly comprises a sliding anchor head which is arranged in the sliding inner cylinder in a sliding manner; the connecting piece is fixed in the interface cylinder piece; the steel rope is connected with the sliding anchor head and the connecting piece.

The application discloses a kind of hierarchical yielding damper vibration reduction structure design methods based on multistage shock absorption target, including in finite element software, establishing uncontrolled vibration reduction structure model, and carrying out time history analysis, obtains the maximum inter-story drift angle and maximum floor acceleration of original structure;Determine the setting position of damper and structure optimization expectation, wherein, damper uses single yield point metal damper;The preset parameter of optimization algorithm is set, including population size N and maximum iteration number T max ;Small earthquake, medium earthquake, large earthquake and super large earthquake are independently used in optimization algorithm respectively under four load conditions The parameter of damper is optimized and calculated;Obtain the optimal parameters of damper under each working condition;Construct the skeleton curve of four-order hierarchical yielding damper;Construct the hysteretic model of hierarchical yielding damper, and bring the hysteretic model into the nonlinear time history analysis of vibration reduction structure.The application solves the problem that traditional damper is difficult to adapt to multi-level, especially super large seismic ground motion demand.

The application relates to a tunnel structure connecting joint capable of crossing an earthquake fracture zone, which comprises a hole body, a lining and a waterproof protective layer, the lining is composed of a plain concrete layer and a steel plate layer, the steel plate layer comprises an outer steel plate, a rubber layer and an inner steel plate, the outer steel plate and the inner steel plate are tightly attached to the rubber layer respectively but are not fixedly connected, the steel plate layer is arranged in the center of the plain concrete layer and is continuously arranged along the tunnel section, the concrete strength grade of the joint area is lower than that of the non-joint area, so that the ductility and energy consumption capacity are enhanced, compared with the prior art, under the action of small earthquakes and medium earthquakes, the steel plate layer and the plain concrete layer work together to ensure the overall rigidity and strength of the joint, under the action of large earthquakes and extremely rare earthquakes, the two longitudinal steel plates can relatively slide to drive the expansion and contraction of the concrete layer in the joint, the two transverse steel plates can extrude the rubber layer to dislocate and deform, tunnel fracture and damage are avoided, and post-earthquake repair is facilitated.

The present application relates to the isolation device of the major lifeline engineering, specifically relates to a kind of isolation device of high lifting frame storage tank structure suitable for super large earthquake, including top concrete slab, bottom concrete slab, horizontal isolation rubber bearing system and sliding support system, the sliding support system is connected by elastic member between, sliding support system includes upper cap plate, cylinder, horizontal pin and bottom connecting steel plate, upper cap plate is left with gap with top concrete slab, cylinder can slide relative to bottom connecting steel plate, the upper cap plate is connected with cylinder by pre-press spring, vertical pin key rod is arranged in the upper cap plate, the horizontal pin is across the lateral wall of upper cap plate and cylinder, the isolation device of the present application, when the earthquake within the fortification intensity occurs, horizontal isolation rubber bearing system bears vertical load, when super large earthquake occurs, the new horizontal isolation system of sliding support system and elastic member composition bears subsequent larger seismic action, protects the safety of upper storage tank.

The invention provides a multi-format seismic data standardization method and device, a medium and equipment, and belongs to the field of seismic exploration. The method comprises the following steps: step 1, acquiring original seismic data; 2, analyzing the original seismic data to obtain a trace header and trace data information; 3, the information obtained in the step 2 is filtered, and a TraceHeader structural body is formed; 4, the TraceHeader structural body is processed, and RDD data are generated; and 5, inputting the RDD data into a Spark cluster for parallel processing. By adopting the method provided by the invention, the format of the seismic data can be standardized, the problems of frequent import and export, low processing efficiency and large disk space occupation in cross-software processing of super-large seismic data are solved, and the efficiency of later analysis and processing of the seismic data is improved.

The application discloses a whole swing controllable frame-shear wall structure and relates to the technical field of earthquake resistance of civil engineering, which comprises a shear wall, a frame column elastic support and a rotating hinge support. The shear wall is surrounded by frame columns and frame beams to form a frame base body on the outside of the shear wall, and the bottom end of the frame column on the outside of the frame base body is fixedly connected with a pier support column. The top end of the frame column elastic support is connected with the bottom end of the pier support column, and the bottom end of the frame column elastic support is connected with a foundation. The top of the rotating hinge support is connected with the bottom end of the shear wall, and the bottom of the rotating hinge support is connected with the foundation. The application provides a structure form which can effectively reduce structural earthquake damage and is convenient to maintain and replace, can effectively improve the seismic toughness of the structure, effectively consume the earthquake action, greatly improve the seismic performance of the structure, prevent major structural damage during a major earthquake, and maximize the reduction of residual displacement, and solve the problems of serious damage of the structure after an earthquake, high maintenance cost or unrepairable structure.

The invention provides a fracture blocking rate inversion method based on GNSS earth crust deformation observation and elastic dislocation theory constraint, and the method comprises the steps: constructing a fracture three-dimensional model and an elastic dislocation constraint model, and calculating a fracture blocking rate. Through multi-period result comparison, strain field verification and earthquake activity verification, a high-risk region of pregnancy and earthquake can be identified. According to the method, the GNSS earth crust deformation observation elastic dislocation theory is adopted to constrain the negative dislocation model, and the precision and stability of fracture blocking rate inversion are remarkably improved. According to the invention, multiple periods of GNSS data are integrated to realize dynamic inversion, and the evolution trend of the locking state can be captured. According to the method, secondary blocks are finely divided, strain rate field constraints are introduced, locking distribution of a local strain enhancement area is accurately identified, the reliability of judgment of a large earthquake risk area is improved, a fracture high-locking-rate area is defined, through theoretical constraint and multi-source data fusion, the fracture locking rate inversion precision and the dynamic capture capability are improved, and the method is suitable for large-scale popularization and application. And reliable technical support is provided for earthquake risk assessment.

The utility model relates to the field of anti-seismic devices, in particular to a multi-order buckling restrained brace device and an anti-seismic building. The multi-order buckling restrained brace device comprises an outer restrained component, a filler and an energy-consuming inner core. The outer restraining component is arranged outside the energy dissipation inner core in a sleeving mode, and the two ends of the energy dissipation inner core extend out of the outer restraining component. The space between the outer constraint component and the energy consumption inner core is filled with the filler. The energy consumption inner core comprises a first inner core plate and a second inner core plate, and the first inner core plate is connected with the second inner core plate; the first inner core plate has first yield strength, and the second inner core plate has second yield strength. According to the multi-order buckling restrained brace device, the multi-order buckling restrained brace energy dissipation and shock absorption design is adopted, multiple times of yielding can be achieved, and therefore the staged energy dissipation effect of small earthquakes, medium earthquakes and large earthquakes can be achieved, a main body structure can be well protected, the main body structure can be prevented from being seriously damaged in the small earthquakes, the medium earthquakes and the large earthquakes, and the service life of the main body structure is prolonged. And convenience is brought to post-earthquake repair.

The invention belongs to the technical field of bridge engineering, and discloses a replaceable anti-beam-falling device for improving the transverse anti-seismic performance of a bridge and a design method thereof.The device comprises a first support and a second support which are arranged in a vertically spaced mode, the first support is connected with a cross beam, and the free end of the cross beam is fixedly connected with the bottom end of a bridge superstructure; the first support and the second support are connected through a plurality of steel plates, and each steel plate comprises a plurality of energy dissipation ribs. According to the scheme, key parameters such as the initial rigidity, the yield strength, the number of the steel plates and the number of the rib plates of the replaceable anti-beam-falling device are designed, so that the replaceable anti-beam-falling device can limit sliding of the rubber support through damage and deformation of the steel plates and preferentially dissipate earthquake energy under the action of medium and small earthquakes, and the replaceable anti-beam-falling device can effectively prevent the rubber support from falling off under the action of large earthquakes. Earthquake energy is jointly dissipated by means of yield deformation of the steel plate, sliding isolation of the support and limited plasticity of the pier, the purpose of expected graded energy dissipation is achieved, and the function of the bridge can be quickly recovered only by replacing the steel plate after an earthquake.

The invention relates to the technical field of earthquake risk analysis, in particular to a structural response danger curve determination method based on simulated earthquake, which comprises the following steps of: 1, dividing an earthquake potential source based on an earthquake activity model of a target site, and generating a random earthquake event directory in target observation time; 2, carrying out random seismic oscillation simulation on the seismic events in the random seismic directory, and constructing a simulated seismic oscillation database; 3, comparing the simulated seismic oscillation data with the seismic oscillation intensity index of the seismic oscillation experience prediction equation, and screening out a qualified time history subset meeting the physical consistency requirement; 4, inputting the qualified time history subset into a finite element model of a target structure to obtain a sample set of structural engineering demand parameters; 5, generating a structure response probability risk curve based on the engineering demand parameter sample set; and key scenes such as near-field large earthquakes can be included, the regional adaptability and authenticity are better, and the seismic oscillation input is more comprehensive.

The invention discloses a nested large-displacement multi-curved-surface beam falling prevention device which comprises a device body, the device body is composed of an upper pendulum and a lower pendulum, the upper pendulum is arranged on the lower pendulum, and a shock absorption and isolation structure is arranged between the upper pendulum and the lower pendulum; the seismic mitigation and isolation structure comprises a transition structure capable of providing a large displacement function and a limiting structure for limiting the transition structure; the transition structure comprises an upper transition plate and a lower transition plate, and the upper transition plate and the lower transition plate are matched with the inner wall of the upper hem and the inner wall of the lower hem respectively. By means of the mode, the nested large-displacement multi-curved-surface anti-beam-falling device is of a shock absorption and isolation structure, the requirements for temperature displacement and shock absorption and isolation displacement under the small earthquake condition can be met, the large-displacement shock absorption and isolation function is achieved under the large earthquake condition, and a bridge is prevented from falling.

The application relates to a horizontal displacement control structure for a seismic isolation building, which is installed outside a seismic isolation support in a seismic isolation layer of the building and comprises a pre-warning reset assembly, a limiting wall and a damping module. The pre-warning reset assembly is arranged adjacent to the seismic isolation support and is used for pre-warning the horizontal displacement of the building. A first buffer gap is formed between the pre-warning reset assembly and a top plate of the seismic isolation layer. The limiting wall is vertically arranged in the seismic isolation layer and is arranged outside the pre-warning reset assembly. The damping module is arranged on one side of the limiting wall close to the pre-warning reset assembly, and a second buffer gap is formed between the damping module and the top plate of the seismic isolation layer. In the horizontal displacement control structure for the seismic isolation building, the pre-warning reset assembly, the damping module and the limiting wall are arranged outside the seismic isolation support according to the distance, a multistage buffer is formed, the buffer gap can consume the horizontal seismic force, and the safety performance of the seismic isolation building under a large earthquake is improved.

The application discloses an anti-seismic energy dissipation column using piezoelectric materials, which comprises an aluminum column, a piezoelectric anti-seismic structure is sleeved in the aluminum column, the piezoelectric anti-seismic structure comprises a power supply and a plurality of first piezoelectric rings, second piezoelectric rings are arranged between adjacent first piezoelectric rings, the positive and negative poles of the power supply are respectively connected with wires, the other ends of the wires are respectively connected with the upper and lower ends of the piezoelectric anti-seismic structure, thin-walled steel pipes are tightly connected with the upper and lower sides of the aluminum column respectively, and the thin-walled steel pipes are filled with micro-expansion cement paste, the aluminum column and the piezoelectric anti-seismic structure are arranged, the elastic property of the aluminum column and the inverse piezoelectric effect of the piezoelectric materials are utilized, the structural damping is effectively increased, the anti-seismic performance of the structure is strengthened, the aluminum column is elastically deformed under small earthquakes, the active control of the structure is realized under large earthquakes through the inverse piezoelectric effect of the piezoelectric materials, and thus the building can be repaired under medium earthquakes and will not collapse under large earthquakes.

This invention relates to the field of engineering earthquake and disaster prevention engineering technology, and particularly to a method and system for predicting the probability of fault deformation in engineering fault resistance. The method includes acquiring basic data of the target active fault, including the fault's geometric characteristics, kinematic characteristics, upper magnitude limit, recurrence period, elapsed time, focal depth, and deformation width; inputting the basic data as input parameters into a computational model; calculating the fault length based on the fault's geometric characteristics; and constructing a two-dimensional computational grid for along and across the fault. This invention provides a novel probabilistic prediction method for assessing the permanent displacement of the shallow crust caused by fault displacement during large earthquakes, as well as the intense deformation of the shallow crust near the fault. It can provide sub-meter level data on fault-alternating dislocation and cross-fault deformation at important engineering sites under a certain exceedance probability.