20 results about "Seismic displacement" patented technology

The invention relates to the technical field of railway earthquake safety, in particular to a rail-bridge system earthquake resistance evaluation method, a medium and equipment. The method comprises the following steps: establishing a finite element model of a track-bridge system; carrying out nonlinear time-history analysis on the track-bridge system under different working conditions; analyzing control factors of earthquake response of the track-bridge system; establishing a mapping relation between the seismic response of the track structure and the seismic response of the main beam; calculating the earthquake response of the main beam, and evaluating the earthquake displacement response of the track structure; and the anti-seismic evaluation of the track-bridge system is realized. Through the method, the method can be used for all high-speed railway bridge types and rails at present, the anti-seismic evaluation of the rail-bridge system based on the driving performance can be indirectly and quickly realized based on the mapping relation, a large amount of time-consuming and labor-consuming train-rail-bridge system finite element simulation calculation does not need to be carried out, and the calculation efficiency is improved. The efficiency is effectively improved, the cost is reduced, the calculation is simple and convenient, and the calculation result is accurate.

The present application belongs to the technical field of earthquake sandy soil liquefaction evaluation, and in particular relates to an evaluation data acquisition method for earthquake liquefaction potential evaluation and an earthquake liquefaction evaluation method, wherein the evaluation data acquisition method comprises the following steps: S1, acquiring a seismic displacement waveform or a strain waveform of a target site during an earthquake; S2, detecting a wave peak and a wave trough of each period of each component seismic displacement waveform or strain waveform, calculating a difference value between the wave peak and the wave trough, and comparing the difference value with a preset statistical significance threshold; and S3, obtaining a dynamic cyclic vibration number representing the driving strength of earthquake liquefaction based on period counting. The present application solves the technical defect that the prior art cannot accurately reflect the actual dynamic loading level of soil during an earthquake, and provides a measurement method for directly acquiring key physical parameters that can truly reflect the driving strength of earthquake liquefaction from displacement waveforms or strain waveforms and a liquefaction potential evaluation method.

The invention discloses an intelligent early warning method for support displacement of a highway-railway dual-purpose bridge based on long-term monitoring data. The intelligent early warning method comprises the following steps: acquiring a temperature index and support displacement monitoring data; calculating longitudinal, vertical and transverse temperature differences of the steel truss girder structure; principal component analysis is carried out on the temperature indexes, and principal components influencing support displacement are extracted; establishing an optimal least square support vector machine prediction model; determining a support displacement early warning threshold value; calculating a displacement residual error of the test sample; and intelligent early warning is carried out on support displacement. The method can be used for accurately predicting the support displacement of the highway-railway dual-purpose bridge, and intelligent early warning of the support displacement under the influence of environmental factors is realized; the method can be implemented in a programmed manner, is simple and quick to operate and has wide engineering application value; the method is of great significance to guarantee driving safety of high-speed trains and overall performance of bridge structures.

This invention discloses an outdoor-mountable window system and its installation method, belonging to the technical field of fixed buildings. The window system includes: an aluminum alloy window frame, aluminum alloy mullions, aluminum alloy window mullions, and insulated glass. The aluminum alloy window mullions are fixed to the civil structure. The front insert of the aluminum alloy window mullion is used to securely connect the aluminum alloy window frame to the mullion. The aluminum alloy window frame is linearly fixed to a steel sub-frame. Using a glass curtain wall installation method combined with an adhesive injection process, the insulated glass can be installed from the outside within the profile frame composed of the aluminum alloy window frame and aluminum alloy mullions, effectively reducing the width of the window system's facade. The installed window system meets the three requirements of curtain walls and has the ability to resist seismic displacement and temperature stress deformation.

A method and system for calculating seismic displacement of friction pendulum bearings in the near-fault region. The method for calculating seismic displacement of friction pendulum bearings in the near-fault region is used to calculate the safety factor of near-fault earthquakes. The safety factor is used to multiply the bearing displacement D(H) when only horizontal ground motion is considered to obtain the bearing check displacement D(H+V) when both horizontal and vertical ground motions are considered. The safety factor calculation model constructed by the present invention only needs to input two ground motion intensity parameters to calculate the safety factor at any set guarantee rate. Calculators only need to calculate the bearing displacement under the action of horizontal ground motion (i.e., the bearing displacement D(H) when only horizontal ground motion is considered), and then multiply it by the safety factor to fully consider the influence of vertical ground motion, providing help for seismic calculation.

This invention discloses a method and system for probabilistic analysis of seismic displacement of heterogeneous slopes based on finite difference, which evaluates the seismic performance of important engineering slopes by generating slope sliding displacement hazard curves. The method and system first determine the statistical quantities of slope soil parameters and select seismic wave records that match the slope site conditions; then, it generates random field samples of soil parameters and iteratively executes stochastic finite difference numerical simulations to calculate the cumulative slope displacement; next, it constructs a slope displacement prediction model using seismic motion parameters and displacement data, and optimizes the seismic motion parameters based on the model's standard deviation; finally, it develops a slope seismic sliding displacement hazard curve within the framework of probabilistic seismic hazard analysis, estimating the displacement value corresponding to the exceedance probability in the target year. This invention can effectively characterize the spatial variability of soil parameters and the uncertainty of seismic loads, and capture the stress-deformation mechanism of slopes under seismic loading, providing an effective approach for the seismic design of highly important engineering slopes.

The invention relates to a plate-type fuel assembly anti-seismic performance analysis method, analysis system and equipment and a readable storage medium. The plate-type fuel assembly anti-seismic performance analysis method comprises the following steps: establishing a plate-type fuel assembly single assembly mechanical analysis model, and carrying out rigidity and modal analysis in two mutually independent horizontal directions to obtain a first analysis result; and comparing first test data of the single-component mechanical property measurement test, and iteratively adjusting model parameters to make the two consistent. Building a multi-component anti-seismic analysis model based on the model, and carrying out dynamic response analysis in two directions to obtain a second analysis result; and comparing second test data of the fuel assembly seismic response measurement test, and iteratively adjusting the parameters to make the second test data accord with the second test data. And inputting an earthquake displacement time history to perform dynamic response analysis, calculating anti-seismic performance data and comparing the anti-seismic performance data with a design limit value to complete anti-seismic performance evaluation. Accurate simulation and performance evaluation of the vibration response of the plate-type fuel assembly under the seismic load can be realized.

This invention relates to the field of railway seismic safety technology, specifically to a method, medium, and equipment for seismic assessment of track-bridge systems. The method includes: establishing a finite element model of the track-bridge system; performing nonlinear time-history analysis on the track-bridge system under different operating conditions; analyzing the controlling factors of the seismic response of the track-bridge system; establishing a mapping relationship between the seismic response of the track structure and the seismic response of the main girder; calculating the seismic response of the main girder and evaluating the seismic displacement response of the track structure; and achieving seismic assessment of the track-bridge system. This invention can be applied to all current high-speed railway bridge types and tracks. Based on the mapping relationship, it can indirectly and quickly achieve seismic assessment of track-bridge systems based on train performance, without requiring extensive and time-consuming finite element simulation calculations of the train-track-bridge system. This effectively improves efficiency, reduces costs, simplifies calculations, and provides relatively accurate results.

To provide a seismic displacement and trajectory inspection device for seismically isolated buildings that can reliably and accurately inspect the functionality of seismically isolated buildings. [Solution] A multi-axis sensor module 10 is installed on the seismically isolated building and can detect and record the acceleration and angular changes of the X, Y, and Z axes of the seismically isolated building. A motion trajectory sensor module 20 is installed on the seismically isolated building and can detect and record the range and trajectory of the movement of the seismically isolated building. A quantitative analysis module 30 is signal-connected to the multi-axis sensor module 10 and the motion trajectory sensor module 20, respectively. Based on the acceleration and angular changes of the X, Y, and Z axes detected by the multi-axis sensor module 10 and the range and trajectory of movement detected by the motion trajectory sensor module 20, the absorbed dynamic energy of the seismically isolated building and its response to the forces it receives can be quantified and analyzed.

This invention provides a rigid connection lightning protection construction method for seismic isolation, belonging to the field of building construction technology. The method includes the following steps: welding a pre-reserved lightning protection flat steel bar inside the upper concrete structure of the seismic isolation layer to a 20mm diameter round steel bar; marking the lower concrete floor slab according to measured length values; welding a 500mm diameter circular steel plate to the lightning protection flat steel bar inside the lower concrete structure at the marked points; welding and fixing a 50mm diameter circular steel plate along its upper end face to install the lower lightning protection round steel bar; installing and fixing the top of the lower lightning protection round steel bar to the upper lightning protection round steel bar using a high-strength spring and steel sleeve; and fixing a spare current shunt component to the upper and lower sides of the lightning protection connection assembly. This invention allows the lightning protection connection to be displaced, and the connection is firm, ensuring the reliability of the lightning protection connection during seismic displacement.

The invention relates to a multi-shaft vibration double-control multidirectional displacement comb plate expansion device, and belongs to the technical field of bridge expansion devices. Comprising a movable toothed plate, a fixed toothed plate, a rotating shaft, a displacement shaft, an upper supporting plate embedded into the movable toothed plate and independent of the movable toothed plate, and a lower supporting plate arranged below the upper supporting plate and fixedly connected with the upper supporting plate. A rotating cavity allowing the rotating shaft to penetrate through and rotate and a displacement cavity allowing the displacement shaft to penetrate through and capable of vertically displacing are formed between the upper supporting plate and the lower supporting plate, and a vibration reduction unit and an anti-seismic unit are arranged in the displacement cavity; the displacement shaft is arranged, and the anti-seismic unit and the vibration reduction unit are arranged in a matched mode, so that after an earthquake occurs, when the vertical displacement of the movable toothed plate exceeds the designed vertical displacement, certain earthquake displacement can still be obtained through plastic deformation of the anti-seismic unit, and meanwhile part of earthquake energy is absorbed; damage of earthquake action to the telescopic device is reduced, and the anti-seismic effect is improved.

The application provides a performance-based high-pile wharf seismic mitigation design method, and the steps are as follows: S0: determining a wharf seismic mitigation system; S1: determining a wharf seismic performance target and a panel displacement limit value; S2: performing a fortification earthquake level design to determine a design parameter of an isolation bearing; S3: performing a seismic mitigation design based on a rare earthquake level, and ensuring that the seismic mitigation wharf realizes the rare earthquake seismic performance target from the energy design angle; S4: performing a structure response check under a rare earthquake by using a nonlinear static method or a nonlinear time-history analysis method, checking a moderate earthquake and a rare earthquake displacement, and simultaneously considering material nonlinearity of a pile and the isolation bearing; and S5: performing a wharf protection component capacity design and a ship collision force check. The design method can satisfy multi-level seismic targets and realize performance-based design of the seismic mitigation wharf.

The invention discloses a Beidou short message real estate co-seismic deformation transmission and GNSS (Global Navigation Satellite System) resolving method, which belongs to the technical field of geophysics, is used for GNSS co-seismic deformation transmission and resolving, and comprises the following steps: a user side performs co-seismic deformation compression, executes information coding and information subpackage, obtains a short message and broadcasts an information subpackage; and the server side performs information sub-packet checking, information decoding, co-seismic deformation recovery and co-seismic deformation splicing integration. The resolving method comprises the steps that the server side collects SSR correction numbers, generates equivalent distance correction numbers of visible satellites of each BDS SMC broadcast epoch, and encodes the distance correction numbers; and the user side downloads the equivalent distance correction from the Beidou satellite, constructs a positioning model by using the original observation value, the broadcast ephemeris and the equivalent distance correction, and performs co-seismic deformation calculation. According to the invention, reliable transmission of the compressed co-seismic displacement is realized, and the risk of data packet loss in the transmission process of the Beidou short message can be avoided.

The invention discloses a fabricated earthquake displacement recording device which can record horizontal and vertical displacement of a building in an earthquake at the same time. The device is mainly composed of a horizontal scale plate substrate, a vertical scale plate substrate, a scale plate and an ejector pin assembly. The horizontal scale plate base plate and the vertical scale plate base plate are fixed to a building through anchor bolt assemblies, and the levelness and perpendicularity of the horizontal scale plate base plate and the vertical scale plate base plate are ensured through adjusting gaskets. Scale marks are marked on the surface of the scale plate and used for recording displacement traces. The ejector pin assembly comprises an ejector pin, a spring, a pressure adjusting gasket and the like and is fixed to a building through an anchor bolt assembly, and the height can be adjusted to ensure that the ejector pin makes contact with the scale plate. And the front end of the ejector pin is made of a metal material with higher hardness, so that displacement marks can be left on the wear-resistant scale plate. The device has the advantages of being high in universality, easy to mount and dismount, reliable in structure, convenient to maintain, good in economical efficiency and the like, and is suitable for earthquake displacement monitoring of new and old buildings.

The present invention relates to a novel low-damage ceiling system, comprising a friction damper and a vibration isolation hanger; the friction damper is located at the connection of the ceiling grid frame, capable of dissipating seismic energy, preventing joint damage, and allowing the ceiling frame to self-center after an earthquake; the friction damper comprises a connecting arm and a torsion spring, the connecting arm being connected to the base plate via a pivot bolt and absorbing seismic energy through a scissor-like motion, the torsion spring being concentrically mounted around the lower portion of the pivot bolt, and being used to allow the arm to self-center after the seismic force dissipates; the vibration isolation hanger comprises: a top hanger, an isolation component, a radial spring, a conventional spring, and a bottom hanger; a cylindrical assembly is provided at the end of the top hanger, and the radial spring is arranged around the cylindrical assembly and returns to its center position after earthquake displacement. Compared with the prior art, the present invention improves the seismic toughness of the ceiling, has high safety and resilience, and has flexibility and energy dissipation capabilities.

The present invention discloses a design method for a bridge AIFB bearing with a spatial damping self-repairing function, which belongs to the technical field of bridge shock absorption and aims to solve the problem that the existing bridge shock absorption structure cannot achieve active shock absorption. The AIFB bearing includes a base, a vertical shock absorption adjustment member, a supporting base plate, an X-direction damping shock absorber, an X-direction adjustment plate, a Y-direction damping shock absorber and a Y-direction adjustment plate from bottom to top. In the case of small vector displacement, the X-direction adjustment plate and the Y-direction adjustment plate begin to move back and forth freely, offsetting the seismic displacement in the X and Y directions respectively, and reducing the vibration amplitude of the box girder; in the case of large vector displacement, the upper computer adjusts the X-direction damping shock absorber and the Y-direction damping shock absorber to move back and forth in the opposite direction of the vibration displacement according to the displacement amount and frequency, so as to offset the displacement amount of the vibration. In this way, active shock reduction can be carried out under the action of high-intensity earthquakes to improve the seismic performance of bridge bearings.

This utility model provides a seismic displacement recording device, comprising: a base, a recording plate, a pin assembly, and a recorder assembly; the base is connected to the recording plate via a fixing column; the pin assembly includes a mounting column, an elastic element, and a pin, the mounting column is mounted on a building column, and the mounting column is connected to the pin via the elastic element, the tip of the pin contacting the surface of the recording plate; the recorder assembly includes a pull rope sensor and a rotation angle sensor, the pull rope of the pull rope sensor passes through a threaded post and connects to the tip of the pin, and the sensing end of the rotation angle sensor is connected to the threaded post. The device of this application is not easily affected by environmental factors, can provide long-term stable and reliable monitoring, and has a simple structure, is easy and quick to install, and is highly practical.

The present invention proposes a multi-level damage constitutive rapid analysis method and system for HSC-HSSB structures, which is applicable to the seismic multi-level damage constitutive analysis of high-strength reinforced concrete piers. After pre-defining the damage state index in the present invention, only by inputting the key parameters, i.e., the state characterization variables, the pier bottom shear force F and the pier top displacement Δ corresponding to each damage state can be obtained. By connecting the origin with the points corresponding to the damage states (the abscissa is the pier top displacement Δ, and the ordinate is the pier bottom shear force F) in sequence, the F-Δ curve (F-Δ: force-displacement) can be obtained. Through the present invention, the F-Δ hysteretic curve and the displacement time history of the pier can be obtained efficiently and conveniently, realizing the rapid assessment of the seismic performance of the pier and the quantitative description of the seismic displacement performance.

The application belongs to the field of satellite navigation and positioning technology, and discloses a method and system for realizing coseismic displacement extraction by using Beidou short message, wherein a monitoring center receives RTS correction numbers broadcast by IGS through a network and saves the RTS correction numbers, calculates RTS real-time precise ephemeris orbit and clock error correction numbers, calculates equivalent distance correction numbers and change rate correction numbers of visible satellites, removes redundant satellites according to a predefined GNSS constellation order and precision attenuation factor, encodes a message header part composed of minute count, satellite number mask per minute and IODSSR, and broadcasts the message header part to an earthquake monitoring station by using a Beidou short message communication terminal, each earthquake monitoring station decodes received short message information to obtain equivalent distance correction numbers, and the precise coseismic displacement sequence is obtained by substituting the equivalent distance correction numbers into a TPP method. The application realizes broadcasting of correction numbers calculated and encoded by IGS RTS, and reduces transmission cost.

The present application relates to the technical field of electric digital data processing, and especially relates to a kind of seabed pipeline multidimensional response correlation optimization method under seismic dynamic excitation, comprising the following steps: establishing seabed pipeline model;Seabed pipeline model is set constraint condition and is applied seismic displacement, the modal frequency of seabed pipeline model, mises stress data and displacement deformation data are calculated;Output pipeline initial mass, calculate pipeline maximum mises stress, pipeline end and central displacement difference, the correlation degree of three optimization criteria and cross section size;The weight of three optimization criteria is calculated;Establish optimization function, and seabed pipeline model is iteratively optimized, and the inner and outer diameter parameters of optimized pipeline are obtained.The method provided by the present application can more effectively improve the seismic performance of pipeline under seismic response, and takes into account pipeline strength, displacement control and quality optimization, improves the safety and reliability of pipeline.