51 results about "Earthquake intensity" patented technology

The invention discloses an intelligent anti-seismic structure optimization design method and system for a high-rise building, and relates to the technical field of anti-seismic design of the high-rise building. A working condition database considering multidirectional seismic oscillation and soil-structure interaction is established in combination with seismic oscillation time history and site investigation parameters; constructing a structure model on the BIM platform, and importing frequency characteristics and load to generate a preliminary design; an inter-story displacement angle, a story acceleration, a plastic rotation angle and an energy dissipation ratio index are set in the model, an anti-seismic performance comprehensive function is constructed, constraints are set according to a standard limit value, the structure model is converted into an optimizable problem, and optimal design is achieved by iteratively calling a working condition database and automatically correcting key component parameters and damping arrangement. According to the method disclosed by the invention, the structural optimization design of the high-rise building under the multidirectional earthquake action is realized by establishing an earthquake working condition database and parameterizing structural modeling and performance function constraint.

The invention relates to the technical field of rail bridge engineering, and particularly discloses a rail-bridge system residual traffic capacity assessment method, medium and equipment, and the assessment method comprises the steps: constructing a rail-bridge system seismic response model and a train-rail-bridge system coupling vibration model of a research object; constructing an earthquake-induced irregularity sample library; establishing a simplified calculation model of the shock-actuated irregularity equivalent coefficient; performing curved surface fitting to obtain a shock-induced composite unsmooth fitting curved surface; putting forward earthquake-induced irregularity thresholds in different driving performance index states, and establishing a linear mapping relation between the earthquake-induced irregularity thresholds and the driving speed; and establishing a mapping relationship among the seismic oscillation intensity, the structure natural vibration period and the post-earthquake driving speed limit value in different driving performance index states, and outputting a residual traffic capacity evaluation result according to the post-earthquake driving speed limit value. According to the method, the problem that in an existing method, the quantitative mapping relation between the current rail surface irregularity after the earthquake and the train operation performance is not clear is effectively solved.

The invention relates to the technical field of power system operation and control, in particular to a power system recovery capability evaluation method, device and equipment considering unconventional risks and a medium, and the method comprises the steps: determining parameters for calculating the occurrence probability of earthquake disasters of different earthquake magnitudes; calculating intensity distribution by using an earthquake intensity diffusion model; calculating transmission tower and transmission line fault probabilities to obtain a fault line set; according to the operation power flow and the maximum allowable power flow, the cascading failure situation is divided into high risk and low risk; aiming at the two conditions, respectively enumerating a first-order fault state set and a second-order fault state set to obtain a system recovery capability initial value; the value serves as input, a convergence threshold value is set, a ULBI-IISE algorithm is adopted for iterative calculation, when the difference value of the upper cut set and the lower complementary set is smaller than the threshold value, the recovery capacity and the interval are output, and the method reduces high-order fault complete enumeration and the calculation amount while guaranteeing the precision, and is suitable for rapid evaluation of emergency scenes such as earthquakes.

The application discloses a kind of track traffic bridge seismic toughness grading evaluation standard construction methods, comprising: determining the function target requirement after earthquake under different earthquake levels;Carry out seismic vulnerability and function vulnerability analysis, determine the structure damage grade and post-earthquake residual function under different earthquake intensity;Determine the repair procedure and repair path of track traffic bridge system component, calculate the repair quantity and component repair period, obtain the repair period of track traffic bridge system;Analysis obtains the traffic function in repair process;Draw ladder type function recovery function and calculate to obtain toughness index;Calculate the effective influence days of different damage grades under different earthquake intensity;Establish the relationship between damage grade and effective influence days, determine the effective influence days range of different damage degree grade, obtain the seismic toughness grading evaluation standard.The application reduces the number and calculation amount of bridge samples, accurately reflects the function recovery situation after earthquake, and is used to guide the seismic fortification of bridge.

This invention relates to the field of seismic isolation bearing technology, specifically a horizontal seismic isolation bearing based on air springs, comprising a lower connecting steel plate, an upper connecting steel plate, a lead-core rubber bearing element, a supporting sliding element, a sector-shaped air spring, and a dust cover. The lead-core rubber bearing element is fixedly connected to the upper part of the supporting sliding element, and the supporting sliding element and the lower connecting steel plate are connected through sliding contact, forming a sliding friction pair. Multiple sector-shaped air springs are arranged circumferentially around the supporting sliding element, and the outer sides of the sector-shaped air springs are connected to steel limiting rings fixed to the lower connecting steel plate. The sector-shaped air springs are internally equipped with limiting devices and buffer rubber to prevent excessive displacement and compression damage. A dust cover is installed on the upper part of the steel piston rod of the sector-shaped air spring. The bearing of this invention can automatically adjust its working state according to the earthquake intensity, primarily using sliding and air springs during minor earthquakes, and activating the lead-core rubber for energy dissipation during major earthquakes, achieving intelligent graded seismic isolation.

This invention provides a method for linking earthquake warnings with the identification of the number of people inside a room. [Solution] The method includes acquiring seismic waves in real time using an acceleration sensor, performing band-pass filtering to obtain seismic waves with a high signal-to-noise ratio, determining the maximum acceleration, maximum velocity, and maximum displacement based on the seismic waves with a high signal-to-noise ratio, predicting the seismic intensity of a seismometer, acquiring earthquake parameters announced by the national public warning system, acquiring the location of the building inside and the seismic design intensity, calculating the source distance based on the epicenter, source depth, and location of the building inside, calculating the earthquake warning intensity from the magnitude and source distance, calculating the earthquake intensity from the seismometer intensity and the earthquake warning intensity, acquiring the number of people inside in real time using a human presence sensor, determining the linked alarm level based on the earthquake intensity, seismic design intensity, and number of people inside, and issuing an alarm and transmitting alarm information according to the linked alarm level.

This invention provides a seismic intensity estimation system that can improve the accuracy of estimation when estimating the seismic intensity class based on the acceleration waveform obtained by the acceleration sensor of a smart device, while the smart device is placed on a stand on the floor. [Solution] The seismic intensity estimation system 1 includes: an acceleration waveform collection unit 23 that collects acceleration waveforms from each of a plurality of smart devices 10 during an earthquake; an acceleration waveform adjustment unit 24 that rotates the acceleration waveforms of the plurality of smart devices 10 so that their orientations in the horizontal plane coincide with each other to generate orientation-adjusted acceleration waveforms; a frame vibration characteristic derivation unit 25 that derives the vibration characteristics of at least one frame based on the orientation-adjusted acceleration waveforms of at least one pair of smart devices 10; and a floor seismic intensity class estimation unit 26 that derives the Fourier spectrum of the floor based on the acceleration waveform on the frame and the vibration characteristics of the frame to estimate the seismic intensity class of the floor.

The invention provides a high arch dam earthquake vulnerability analysis method and system based on an extreme gradient lifting tree theory, and the method comprises the steps: obtaining a plurality of pieces of earthquake vibration data meeting the feature requirements of a high arch dam site, and constructing an engineering demand parameter set and an earthquake vibration intensity parameter set; constructing a high arch dam probability earthquake demand model based on an extreme gradient lifting tree model, and fitting a non-linear relationship between engineering demand parameters and earthquake intensity parameters; fitting a change curve of the engineering demand parameters with respect to the acceleration response spectrum value in the first-order natural vibration period based on a scalar model, and extracting boundary values divided by different anti-seismic performance levels; and on the basis of an engineering demand parameter logarithmic normal distribution hypothesis, using the fitted high arch dam probability earthquake demand model to construct an earth surface vulnerability function, and inputting an earth vibration strength parameter and boundary values of different anti-seismic performance levels for calculation to obtain earthquake vulnerability probabilities of the high arch dam under the different anti-seismic performance levels.

The invention provides an earthquake scene simulation system and method and computer equipment, and relates to the technical field of earthquake emergency. The system comprises a natural language interaction layer, a central scheduling module, a multi-source data fusion layer, a professional calculation layer and a visualization and decision support layer. The earthquake scene simulation system receives a natural language instruction based on a natural language interaction layer under the condition of earthquake scene simulation; the central scheduling module is used for sequentially sending trigger instructions to other levels of the system based on the structured instruction; the multi-source data fusion layer is used for querying seismic data and obtaining a unified seismic feature data set based on association integration of a knowledge graph; the professional calculation layer is used for generating a structured decision scheme and determining seismic intensity and seismic loss evaluation results; and the visualization and decision support layer is used for constructing a city-level three-dimensional scene and generating multi-class earthquake thematic maps. The system can improve scientificity and timeliness of earthquake disaster response decisions.

This invention discloses a high-voltage DC bypass switch for improving reliability in areas with strong winds and high seismic intensity. It includes a switch body, a support bushing, and an operating mechanism. To enhance mechanical stability, a parallel insulating support structure is added beside the support bushing. This structure is rigidly connected to the flange at the top of the support bushing via a connecting plate, forming a triangular support frame. For the independent high-voltage node introduced by this structure, a split-type voltage equalization assembly is provided: a first voltage equalization ring is fixed to the top of the insulating support structure, and a second voltage equalization ring is fixed to the flange. Both voltage equalization rings are U-shaped, with opposite openings and electrical isolation, optimizing the electric field at two locations and effectively suppressing partial discharge. This invention synergistically solves the problem of improving the mechanical strength and insulation performance of high-voltage DC switches in harsh environments.

The invention relates to the technical field of earthquake disaster assessment, and particularly discloses a multi-precision earthquake disaster rapid assessment method, which comprises the following steps: step 1, processing building basic data, and dividing the precision of the collected building data from high to low; step 2, calculating and generating seismic intensity distribution through a seismic intensity attenuation formula on the basis of three-element information of seismic time, magnitude and epicenter position of the earthquake; 3, selecting an evaluation precision strategy, wherein the evaluation precision strategy comprises an optimal precision strategy and a manual specified precision strategy; and step 4, based on the processed building basic data, calculating the obtained seismic intensity distribution and the screened building data participating in the calculation. According to the method, the building basic data is graded according to the precision, the optimal precision strategy and the manual specified precision strategy are supported, the method can adapt to the basic data precision of different areas, the maximum benefit of the data precision is fully played, and the problem that the evaluation precision of an existing method is single is solved.

The invention relates to the technical field of power system grounding protection and seismic resistance, and discloses an equipment grounding connection structure suitable for a high seismic intensity region, which comprises a copper woven belt flexible connection unit bridged between an external equipment bracket and a grounding lead-up copper bar. The unit is a prefabricated integrated assembly and comprises a middle flexible braided section, rigid ends at two ends and a local insulating sheath. The upper end of the grounding lead-up copper bar is fastened with a grounding lug plate at the bottom of the support through an anti-loosening bolt assembly, and the lower end is fused with the grounding lead-up copper bar through exothermic welding and conductive paste filling. During installation, the flexible section is kept loose, and the length allowance which is 1.2-1.5 times of the designed displacement amount is reserved. Relative displacement caused by earthquakes is absorbed through flexible geometric deformation, mechanical tension is converted into deformation energy, the problem that traditional rigid connection is prone to breakage is solved, and the physical integrity and electrical conduction safety of a grounding loop in the high-intensity earthquake environment are ensured.

A prefabricated lightweight aggregate fiber concrete sandwich insulated composite wall with a frame structure is disclosed. The composite wall consists of prefabricated lightweight aggregate fiber concrete sandwich insulated composite wall panels connected to the frame structure to form an integral whole. The top and bottom ends of the prefabricated lightweight sandwich insulated composite wall are connected to the crossbeams via sliding energy-dissipating nodes. Limiting devices are provided between the left and right sides of the prefabricated lightweight sandwich insulated composite wall and the frame columns, and filling material is also adhered between the left and right sides of the prefabricated lightweight sandwich insulated composite wall and the frame columns. The lightweight aggregate fiber concrete uses fine ceramsite as coarse aggregate to reduce the weight of the wall and decrease seismic forces. The addition of polypropylene fibers to the formula improves the ductility and crack resistance of the concrete. This invention features fire resistance, thermal insulation, earthquake resistance, and convenient connection, effectively improving the seismic performance and thermal insulation performance of buildings in high seismic intensity and cold regions, while reducing construction difficulty.

The application discloses a kind of intelligent anti-seismic structure optimization design method and system for high-rise building, it is related to high-rise building anti-seismic design technical field, including taking seismic intensity zoning, site category and fault distribution information, establish the working condition database considering multi-directional ground motion and soil-structure interaction in combination with ground motion time history and site survey parameters;Structure model is constructed in BIM platform and is imported frequency characteristics and load to generate preliminary design;Inter-story drift angle, floor acceleration, plastic rotation and energy dissipation ratio index are set in the model, construct seismic performance comprehensive function, set constraint according to specification limit, convert structure model into optimization problem, realize optimization design by iteratively calling working condition database and automatically correcting key component parameters and damping arrangement.The method described in the application realizes the structure optimization design of high-rise building under multi-directional seismic action by establishing seismic working condition database, parameterized structure modeling and performance function constraint.

The invention discloses an intelligent analysis method and system for seismic isolation performance parameters based on a dynamic model, and relates to the technical field of seismic isolation performance analysis, and the method comprises the steps: obtaining seismic isolation system information, obtaining target seismic isolation grade information based on a seismic isolation design target according to seismic isolation system structure information, and obtaining a target seismic isolation grade according to protected equipment information; and based on the vibration sensitivity analysis of the protected equipment, obtaining the foundation vibration isolation grade information. According to the method, the stress condition of the seismic isolation system is accurately analyzed through the seismic stress feature points, the difference between different data is determined through the seismic isolation energy consumption coefficient, and the seismic isolation level is calculated by taking the basic seismic isolation level and the target seismic isolation level as the seismic simulation level range and the seismic intensity sensitive interval as the seismic level change value. The earthquake simulation test is carried out on the earthquake isolation system, the accurate test of the earthquake isolation performance is realized, the data is comprehensively processed through the weight coefficient, and the stability and the reliability of the analysis of the earthquake isolation performance are ensured.

The invention discloses a combined support for cooperative vibration control of a wooden framework column of a temple pavilion type ancient building. The combined support comprises a spring support assembly, a first rubber support, a connecting piece and a second rubber support. The bottom faces of the multiple spring support assemblies are connected to the foundation buttress in a bolted mode and support the multiple wooden framework columns in a one-to-one correspondence mode. The first rubber support is bolted on the top surface of the foundation buttress; the connecting piece comprises a connecting steel plate and a cylindrical plate; the connecting steel plate is anchored on the top surface of the first rubber support; the lower end face of the cylindrical plate is fixed to the top face of the connecting steel plate. The second rubber support is in an annular column shape and sleeved with the cylindrical plate, the annular inner wall of the second rubber support is in bolted connection with the cylindrical plate, and the annular outer wall of the second rubber support is in bolted connection with the wood framework column. The spring support assembly is used for providing vertical micro-vibration protection, the first rubber support is used for providing horizontal strong earthquake protection, the second rubber support is used for providing vertical strong earthquake protection, and the problem that subway vertical environment vibration control and horizontal earthquake aseismic design of ancient buildings close to the subway in a high earthquake intensity area are difficult to coordinate is solved.

The application discloses a kind of earthquake trigger calculation and information collection method, optical terminal intensity instrument and system, specifically include: in optical terminal intensity instrument, build edge computing unit, make it have local real-time data processing and trigger judgment ability;Through the improved multi-scale STA / LTA algorithm is combined with frequency domain feature recognition to carry out adaptive trigger detection, and real-time calculation of seismic parameters and seismic intensity value, then through special earthquake data collection protocol data is uploaded to regional collection server.The application will change the traditional "data upload-center processing-result issue" mode into "edge computing-result direct transmission" mode, fundamentally eliminate the network transmission delay of a large number of original waveform data and the queuing processing delay of central server, improve the early warning response speed, reduce network load, enhance system reliability and scalability.

To provide an earthquake information distribution system etc. that can realize evacuation taking into consideration the impact of damage to buildings. [Solution] The earthquake information distribution system includes a receiving unit that receives emergency earthquake alerts distributed by the Japan Meteorological Agency, a prediction unit that, when the emergency earthquake alert is received, calculates a predicted value of the seismic intensity at a specified location based on the emergency earthquake alert, an evaluation unit that predicts the response spectrum of a building at the specified location based on the emergency earthquake alert and performs a damage assessment of the building based on the predicted response spectrum results, and a distribution unit that distributes earthquake information including information regarding evacuation instructions based on the damage assessment to terminals at specified locations where the predicted value of the seismic intensity exceeds a threshold, and the evaluation unit calculates the response spectrum of the building using a response calculation model based on the observation results of a seismometer installed in the building, and performs a damage assessment of the building again based on the calculated response spectrum results.

An anti-seismic optimization design method for a structure belongs to the field of civil engineering and anti-seismic design, and comprises the following steps: step 1, selecting representative seismic intensity based on a field seismic risk curve; step 2, acquiring the layer stiffness and the layer shear strength of the initial building; step 3, establishing a multi-degree-of-freedom layer model by adopting OpenSees software; step 4, evaluating component damage and economic loss by adopting an HAZUS database; 5, constructing a cost constraint model and realizing equivalence; step 6, carrying out joint optimization on the shear strength and rigidity of each layer of the structure by adopting a particle swarm optimization algorithm; and 7, outputting an optimization result: outputting the optimal layer shear strength and rigidity distribution. According to the method, the economic loss is reduced on the premise of ensuring that the construction cost is not changed by combining site danger, component damage and loss evaluation and the swarm intelligence algorithm.

The invention relates to the technical field of seismic engineering, in particular to a method and a system for predicting a surface peak acceleration amplification coefficient. The method comprises the following steps: establishing a regional seismic intensity attenuation relation model based on a single random variable weighted least square method for carrying out regression analysis, and establishing a regional bedrock seismic oscillation attenuation relation model based on a step-by-step regression conversion method, proposing estimation of the amplification coefficient of the peak acceleration of the earth surface based on the average shear wave velocity prediction within 30 meters below the earth surface of the hybrid model; by adopting the above mode, the precision and reliability of seismic intensity and bedrock seismic oscillation attenuation prediction are improved, the efficient and accurate estimation of the earth surface peak acceleration amplification coefficient is realized, and the scientificity and effectiveness of earthquake risk assessment and aseismic design can be enhanced.

This invention provides a seismic lethality assessment system that couples seismic intensity with building structure type. It includes a sequentially connected epicenter setting module, intensity calculation module, building information acquisition module, coupling assessment module, and result output module. The coupling assessment module is communicatively connected to the other four modules, enabling fully automated seismic lethality assessment. This invention deeply couples seismic intensity with building structure type, taking into account factors such as regional topography and population density. It is adapted to the loess hilly topography and building distribution characteristics of the key earthquake defense area in southern Ningxia, with the epicenter setting and assessment model closely matching the actual regional conditions. The assessment results are directly related to the number of people requiring emergency resettlement and the demand for rescue materials, providing direct support for emergency response plan development and rescue force deployment. Furthermore, this invention can adapt to the assessment needs of different earthquake defense zones by updating building information and adjusting the parameters of the intensity attenuation formula.

The present application relates to the field of earthquake early warning technology, in particular to a noise detection method for MEMS seismic intensity meter of earthquake early warning network, comprising sensitivity coefficient check, vertical polarity determination, directional data missing determination and short-time abnormality detection, compared with the prior art, the present application removes abnormal data noise through sensitivity coefficient comparison, determination of station installation direction and determination of three directional data, and can determine and process short-time abnormal noise, which helps to improve the accuracy of earthquake early warning processing results.

The application relates to a seismic emergency detection adjustment method and system, and belongs to the technical field of communication equipment detection. The detection adjustment method comprises the following steps: receiving a seismic early warning information; the seismic early warning information comprises a seismic intensity grade; a preset anti-seismic grade of communication equipment in each building in a hydropower station is acquired; whether the seismic intensity grade exceeds the preset anti-seismic grade of the communication equipment in each building is judged respectively, if yes, the detection frequency of the communication equipment in the building is adjusted to a corresponding preset detection frequency peak value; if not, a grade ratio is calculated according to the seismic intensity grade and a preset anti-seismic grade threshold value, a to-be-adjusted detection frequency value is obtained according to the grade ratio and the preset detection frequency peak value, and the detection frequency of the communication equipment in the building is adjusted according to the to-be-adjusted detection frequency value. The application can meet the detection requirements of the communication equipment in different buildings at the same time when facing different seismic grades.

The invention discloses an earthquake trigger calculation and information collection method, an optical terminal intensity instrument and a system, and the method specifically comprises the steps: constructing an edge calculation unit in the optical terminal intensity instrument, and enabling the optical terminal intensity instrument to have local real-time data processing and trigger judgment capabilities; adaptive trigger detection is carried out through an improved multi-scale STA / LTA algorithm in combination with frequency domain feature recognition, seismic parameters and seismic intensity values are calculated in real time, and then data are uploaded to a regional collection server through a special seismic data collection protocol. According to the method, a traditional data uploading-central processing-result issuing mode is converted into an edge calculation-result direct transmission mode, network transmission time delay of a large amount of original waveform data and queuing processing time delay of a central server are fundamentally eliminated, the early warning response speed is increased, the network load is reduced, and the early warning efficiency is improved. And the reliability and the expandability of the system are enhanced.

The application relates to the technical field of anti-seismic design in civil engineering, and discloses an SMA bionic honeycomb sandwich structure, which comprises an outer honeycomb and an inner honeycomb, the wall thickness of the outer honeycomb can be expressed as: lambda L h1 , wherein Lh1 is the side length of the outer honeycomb, L h2 is the side length of the inner honeycomb, and lambda is the wall thickness side length ratio of the honeycomb; the gap 0.5u1 between the outer honeycomb and the inner honeycomb can be expressed as: 0.5u1=L h1 cos 30 DEG - lambda L h1 -L h2 cos 30 DEG, wherein Lh1 is the side length of the outer honeycomb, L h2 is the side length of the inner honeycomb, and lambda is the wall thickness side length ratio of the honeycomb; the gap 0.5u1 between the outer honeycomb and the inner honeycomb can be expressed as: 0.5u1=L h1 cos 30 DEG - lambda L h1 -L h2 cos 30 DEG, the multistage honeycomb sandwich structure can adapt to different levels of earthquake intensity, the honeycomb structure has different stiffness levels while having the geometric large deformation capacity, the embedded solid hexagonal block protection structure is damaged when the displacement is too large, self-resetting after the earthquake is realized, and the super-elasticity of the SMA material has strong self-resetting performance under strong earthquakes.

The application aims to provide a seismic disaster personnel risk assessment method, system and electronic equipment, and relates to the technical field of seismic disaster personnel risk determination. According to a remote sensing image of a to-be-measured region, the application determines the structure type, function type and population of a plurality of buildings in the to-be-measured region; and according to the probability of different damage degrees of buildings of different structure types under a current seismic intensity, the application determines the number of injured and the number of dead of each building under the current seismic intensity. The application can perform seismic disaster personnel risk assessment before an earthquake occurs, and the risk assessment result is used for formulating a seismic disaster relief plan and a disaster relief plan, thereby improving the rationality and efficiency of disaster relief work after an earthquake occurs.

The present disclosure provides a coal mine roadway mine earthquake intensity evaluation method and device, which relates to the technical field of coal mine safety. The method comprises: obtaining mine earthquake waveform data of a coal mine roadway area; determining the mine earthquake intensity of the coal mine roadway area according to the peak particle velocity (PPV) value of the mine earthquake waveform data and a mapping relationship between the PPV value and the mine earthquake intensity. The mapping relationship between the PPV value and the mine earthquake intensity is determined by using a plurality of mine earthquake waveform sample data and a numerical model for numerical simulation. The present disclosure can accurately predict the mine earthquake intensity according to the mine earthquake waveform data, and the obtained mine earthquake intensity can accurately reflect the influence and damage of the mine earthquake waveform data on the roadway, so that the staff can evaluate the potential threat of the roadway structure, significantly improve the effectiveness of mine safety management, and effectively control and reduce the economic losses caused by mine earthquakes.

To provide a shelter for protecting the body of a family in about several seconds at the time of a large earthquake (equivalent to a seismic intensity of 7) as an indoor frame material at ordinary times.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

To provide a shelter for protecting the body of a family in a few seconds at the time of a large earthquake (equivalent to a seismic intensity of 7) as an indoor frame material in a daily life.SOLUTION: A long side 11 of a rectangular main plate 1 which is a horizontal FRP member 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 and 2 formed of the same material as the rectangular main plate 1 and inclined downward toward the outside with a horizontal line as a reference, and a tension string-like object 4 is tied between both opposed end part raising parts 2 and 2. At ordinary times, the rectangular main plate 1 is formed in a flat shape, and at the time of a large earthquake, the tension string-like object 4 is properly shortened by tensile force by power, and the rectangular main plate 1 is formed and fixed in a curved shape in the whole longitudinal direction, and the end part high rise parts 2 and 2 are formed in a vertical shape, and can be formed as a body shelter.SELECTED DRAWING: Figure 13