55 results about "Earthquake engineering" patented technology

The invention belongs to the technical field of geotechnical engineering disaster prevention and reduction and earthquake engineering tests, and relates to a vibration table test method considering time-varying deterioration of anti-seismic performance of an anchored rock slope. The method comprises the following steps: firstly, constructing a dynamic performance time-varying deterioration model based on an anchoring system interface bonding force and a free section steel bar yield resistance attenuation rule; physical equivalent simulation of interface degradation and component yield resistance reduction is realized by regulating and controlling the proportion of rock mass similar materials and utilizing a graded rigidity anchoring system. The core of the method is that before a vibration table applies seismic waves, attenuation of the anchoring performance of a supporting structure is actively simulated in advance, so that a real evolution path that the bearing capacity of an anchoring system is reduced firstly, slope stress redistribution and accumulated damage are caused, and then sudden seismic loads are suffered is reproduced; the limitation that only the static low bearing capacity is simply simulated in a traditional test is broken through. According to the method, space-time coupling of static time-varying degradation accumulation and transient earthquake dynamic action is effectively achieved, the problems of interface degradation simulation distortion and the like are solved, and a reliable test method is provided for dynamic stability evaluation and reinforcement design of a long-term service anchoring slope.

The invention discloses an experiment device and method for dangerous rock mass collapse induced by earthquake-excavation-acid rain coupling, and belongs to the technical field of geotechnical engineering simulation experiments, and the device comprises a counter-force supporting assembly, an earthquake dynamic disturbance simulation application assembly, an engineering excavation disturbance simulation application assembly and an acid rain corrosion and rainfall simulation assembly; the earthquake dynamic disturbance simulation applying assembly, the engineering excavation disturbance simulation applying assembly and the acid rain corrosion and rainfall simulation assembly are all arranged on the counter-force supporting assembly, and the slope dangerous rock mass model is located in the counter-force supporting assembly. The experimental device can simulate influence factors such as earthquakes, engineering excavation, acid rain corrosion, rainfall and river scouring, the influence factors can be combined at will to simulate the inoculation and induction process of dangerous rock mass collapse disasters under the coupling condition of the various influence factors, and an experimental conclusion is obtained on the basis. The method can reflect the inoculation and induction mechanism of the dangerous rock mass collapse disaster more truly, and provides technical support for the prediction and forecast of the dangerous rock mass collapse disaster.

A seismic energy estimation method based on generalized spherical wave propagation, relating to the field of earthquake engineering. The method comprises: determining initial seismic total energy and seismic power on the basis of seismic source characteristics and a seismic magnitude; determining a generalized spherical wave equation, and calculating an average energy flow density of propagated waves on the basis of the wave equation of spherical waves; using an earth surface spherical crown, which is projected on the zone of a seismic source surface, as a main impact zone of seismic spherical waves on an earth surface, the main impact zone being equivalent to a square and performing grid division, and calculating the hypocentral distance between the center of each grid and the center of a seismic source so as to form a hypocentral distance matrix; and expressing the generalized spherical wave energy flow density of each grid as the sum of the energy flow density of longitudinal waves and the energy flow density of transverse waves, performing grid subdivision, estimating the average amplitude of each subdivided grid mass unit within a seismic action period, and evaluating the seismic action energy of a site. The present invention estimates the action of seismic energy on the earth surface by defining the generalized spherical wave propagation of seismic source energy, thereby more accurately evaluating the distribution condition of seismic energy on the earth surface.

The invention relates to the technical field of earthquake engineering, geotechnical engineering and geological disaster assessment, in particular to an earthquake landslide risk assessment method and system, and the method comprises the following steps: obtaining regional topographic data, and constructing a topographic geometric model based on the regional topographic data; on the basis of the terrain geometric model, identifying a specific landform unit in which energy convergence may exist in the region; for the specific landform unit, simulating a propagation path of a seismic wave in the terrain geometric model, and determining the energy influence degree of the specific landform unit on the seismic wave according to the change of the propagation path; according to the method, the influence of complex terrains on the local energy of seismic waves can be effectively considered by constructing a terrain geometric model, identifying an energy convergence landform unit, simulating seismic wave propagation and correcting seismic oscillation parameters, so that the influence of the complex terrains on the local energy of the seismic waves can be effectively considered.

The present application relates to the field of geotechnical engineering and earthquake engineering, in particular to a method for calculating the nonlinear buried super-barrier Rayleigh wave dispersion relation in the foundation. The method comprises: obtaining the structure data of the nonlinear buried super-barrier resonance layer, and obtaining the relative motion equation according to the structure data and the relative displacement; obtaining the total displacement amplitude by analyzing the relative motion equation; obtaining the first motion control equation by using the inner and outer displacement amplitudes; deriving the first displacement component and the first stress component according to the first motion control equation; constructing the second motion control equation, and deriving the second displacement component and the second stress component by using the second motion control equation; and obtaining the dispersion relation curve based on the first displacement component, the first stress component, the second displacement component and the second stress component. The method solves the problems in the prior art, such as the dependence on experience trial and error or large-scale numerical simulation for super-barrier vibration isolation design and low-frequency vibration suppression, and the insufficient prediction accuracy of dispersion characteristics.

The invention discloses a covering layer foundation soil dynamic pore pressure-deformation indoor triaxial test method for reflecting an earthquake loading process, and belongs to the field of geotechnical engineering and earthquake engineering. Firstly, a numerical geometric model is created, and soil physical and mechanical parameters are input; secondly, carrying out power time history response analysis, outputting seismic dynamic stress response time histories of soil mass units at different positions and different depths in a numerical simulation result, and converting the seismic dynamic stress response time histories into test control loads; thirdly, carrying out an indoor dynamic test, loading a test control load, and collecting dynamic response data of the soil body under the earthquake action; and finally, on the basis of the dynamic response data, determining dynamic test results of all units of the covering layer by adopting an interpolation method according to stress states and dynamic strain amplitude interpolation, and completing dynamic characteristic analysis. According to the method, excessive simplification and blind test of a traditional test can be avoided, the authenticity and accuracy of the foundation soil dynamic test are remarkably improved, and the method is suitable for accurate evaluation of the dynamic characteristics of the ultra-deep soft covering layer foundation soil.

The invention discloses a method and system for calculating a seismic oscillation amplification coefficient of a river valley field under SV wave incidence, and belongs to the technical field of rock-soil seismic engineering, and the method comprises the steps: building a model; analyzing an infinitesimal body; establishing a free field; establishing a scattering field; substituting boundary conditions; solving a matrix equation; and calculating an amplification coefficient. According to the method, a wave field caused by an irregular terrain of the earth surface is constructed by an interval decomposition strategy taking a terrain cuspidal point as a demarcation point, a method for calculating the seismic oscillation amplification coefficient of the river valley field under SV wave incidence is provided, and the influence of factors such as river valley geometric parameters, material parameters, the frequency and incident angle of incident waves and the like on the river valley seismic oscillation amplification coefficient is revealed; a theoretical basis is provided for aseismic design of major projects of river valleys; the calculation method is a semi-analytical method, reveals the physical nature of irregular terrains on seismic wave propagation and scattering, improves the calculation precision and efficiency, and can be used as a reference for verification of a numerical method.

The invention relates to a bridge plate type rubber support anti-seismic system adapting to bearing rotation, and relates to the field of bridge engineering and earthquake engineering. The bridge plate type rubber support anti-seismic system adapting to bearing rotation comprises a plate type rubber support, an upper top plate, an arc-shaped sliding block, a bridge pier and a polytetrafluoroethylene sliding plate. The top of the plate-type rubber support is fixedly connected with an upper top plate which is used for being connected with a bridge girder. The bottom of the arc-shaped sliding block protrudes downwards so that the bottom face can form a first arc-shaped face, and the top of the arc-shaped sliding block is fixedly connected with the bottom of the plate type rubber support. The arc-shaped sliding blocks are stressed to rotate relative to the arc-shaped sliding grooves, so that the arc-shaped sliding blocks adapt to relative rotation generated between the pier and the main beam, pure bending stress of the plate-type rubber support is avoided, excessive deformation of the plate-type rubber support is avoided, the effect of protecting the plate-type rubber support is achieved, and therefore the anti-seismic property of the plate-type rubber support is improved. The function exerting time of the plate type rubber support under the earthquake effect is prolonged, and effective guarantee is provided for construction rescue.

The invention discloses an earthquake sand liquefaction deformation prediction method based on machine learning, and relates to the technical field of earthquake engineering and machine learning. Missing value processing, abnormal value detection, feature selection and standardization processing are carried out on the multi-source coupling seismic data set to obtain a seismic sand liquefaction deformation data set, a seismic sand liquefaction deformation prediction model is constructed according to the seismic sand liquefaction deformation data set, the root-mean-square error, the mean absolute error and the decision coefficient of the model are calculated, and the seismic sand liquefaction deformation prediction result is obtained. And according to corresponding threshold judgment, carrying out hyper-parameter adjustment on the model through Bayesian optimization or carrying out model packaging through Flask, processing the obtained new seismic sand liquefaction characteristic data, and inputting the processed data into the packaged model to obtain a seismic sand liquefaction deformation prediction result. The method can effectively predict earthquake sand liquefaction deformation, and provides support for earthquake disaster prevention and engineering design.

The present application relates to railway route selection technical field, and relates to a kind of railway route selection scheme across seismic fault's total probability risk assessment method.The assessment method uses Monte Carlo simulation, establishes the total probability risk analysis model suitable for railway route selection design across fault zone, is based on the theory of performance-based earthquake engineering, integrates fault zone displacement probability risk analysis, railway structure object probability vulnerability analysis and railway fault rear probability economic loss analysis, can be combined with fault zone characteristics (position, geometric shape, seismic intensity) The annual exceedance probability of specific displacement value is calculated, the damage state of different railway structure (usually avoid using bridge mode to cross fault zone, therefore, the present application mainly considers the intersection of tunnel, embankment section and fault zone) under the influence of fault displacement is evaluated, simultaneously, total probability risk analysis model across fault zone and cost minimization model form cost-risk net present value model, and construction cost and cross-fault zone risk are simultaneously evaluated.

The invention aims to provide a three-dimensional pile-soil point-surface non-linear contact full-coupling numerical simulation method, and belongs to the technical field of rock-soil earthquake engineering. The method comprises the following steps: acquiring physical model test data; constructing a numerical model of the liquefied inclined field pile group supporting bridge, dividing a soil body sub-domain by adopting a discontinuous domain multi-scale method, and combining a variable permeability coefficient analysis model and a liquefied soil body constitutive model; establishing a point-surface contact model, and constraining and simulating shear stress transfer and dislocation deformation of a pile-soil interface through a penalty function; constructing a three-dimensional free field shear model, and simulating layered shear motion; and applying loads in stages, obtaining pile-soil-structure dynamic response, and comparing the pile-soil-structure dynamic response with test data. According to the method, the limitation of a constant permeability coefficient model is broken through, refined simulation of the aseismic design of the liquefied site pile foundation under the complex working condition is realized by dynamically updating the permeability coefficient, the point-surface contact model and multi-scale grid division, and the simulation precision and the calculation efficiency are remarkably improved.

The invention relates to a vibrating table sample manufacturing device, and belongs to the field of rock-soil earthquake engineering. The vibrating table sample manufacturing device comprises a shaping frame, a storage frame, a first bottom plate, a second bottom plate and an adjusting assembly. A shaping cavity for shaping a sample is formed in the shaping frame; the storage frame is located below the shaping frame, and a storage cavity used for containing a sample is formed in the storage frame; the first bottom plate is located between the shaping frame and the storage frame in the gravity direction, the first bottom plate moves relative to the shaping frame in the first direction so that the storage cavity and the shaping cavity can be separated or communicated, and the first direction is perpendicular to the gravity direction; the vibrating table sample manufacturing device further comprises a second bottom plate and an adjusting assembly, the second bottom plate is arranged in the storage cavity, and the adjusting assembly is configured to drive the second bottom plate to move in the gravity direction.

This invention discloses a seismic treatment effectiveness evaluation system for thick loess sites, belonging to the fields of geotechnical engineering and earthquake engineering technology. The system comprehensively evaluates the seismic treatment effect by acquiring dynamic characteristic parameters and seismic response parameters of thick loess sites before and after seismic treatment. The system includes a site foundation parameter acquisition module, a dynamic characteristic parameter acquisition module, a loess dynamic degradation characteristic analysis module, a seismic response simulation module, a seismic treatment effectiveness quantification module, and an evaluation result output module. Specifically, it analyzes the loess dynamic degradation characteristics based on parameters such as shear wave velocity, shear modulus, and damping ratio, and acquires seismic response results such as surface acceleration, shear strain, and site amplification factor under the same seismic motion input conditions. By normalizing and weighting the dynamic degradation improvement index and the seismic response improvement index, a comprehensive seismic treatment effectiveness index is constructed, enabling quantitative evaluation and classification of seismic treatment effectiveness.

The embodiment of the invention discloses a non-stationary seismic oscillation generation method and device, electronic equipment and a storage medium, and relates to the technical field of seismic engineering, and the method comprises the steps: 1, generating a seed seismic oscillation time history based on a power spectrum model; 2, performing wavelet packet decomposition on the seed seismic oscillation time history to obtain a group of sub-signal components in a time-frequency domain, and identifying a strong seismic time period; 3, constructing a time-varying function, and correcting sub-signal components in a strong earthquake time period; 4, reconstructing and generating an intermediate seismic oscillation time history according to the adjusted sub-signal components, and judging whether the intermediate seismic oscillation time history meets a preset precision requirement or not; if not, taking the intermediate seismic oscillation time history as a new seed seismic oscillation time history, and repeating the steps until a preset precision requirement is met; through time domain localization correction, the contradiction between response spectrum matching and intensity non-stationary maintenance is solved, seismic oscillation which accords with a target response spectrum and has real non-stationary characteristics is generated, and the reliability of anti-seismic analysis is improved.

The invention relates to the technical field of seismic engineering and geological disaster prevention and control, and discloses a slope seismic oscillation comprehensive risk assessment method considering gradient-incident angle-back-facing slope three-dimensional coupling, and the method comprises the steps: building a three-dimensional double-sided slope dynamic response model, laying monitoring points on a flat ground in front of a slope and slope surfaces at two sides, and carrying out the construction of a three-dimensional double-sided slope dynamic response model; setting free field boundaries around the model, inputting seismic waves subjected to polynomial baseline correction processing, and calculating peak acceleration amplification coefficients under the conditions of different gradients, incident angles and slope orientations; on the basis, a sensitive incident angle threshold weight and a back-facing slope asymmetric weight are introduced, a normalized amplification coefficient is combined, a gradient-incident angle-back-facing slope three-dimensional coupling comprehensive risk index is constructed, and unified quantification and grading evaluation of risk intensity under the conditions of different gradients, different incident angles and different slopes are achieved. The method can systematically reveal the coupling rule of the double-slope seismic oscillation amplification effect, and provides a scientific basis for the seismic design of mountainous engineering and regional seismic damage risk assessment.

The invention belongs to the field of rock-soil earthquake engineering, and particularly relates to a method for evaluating the anti-seismic performance of an end bearing pile in stratified soil under the action of earthquake S waves. According to the method, a pile-soil model is established on the basis of a continuous medium theory under a linear elastic frame, and displacement of a free field and a scattered field of a soil body is decoupled through a Helmholtz decomposition method; the soil layer boundary is processed by adopting the orthogonality of a modal function characteristic function, and the motion response of the pile foundation is described by adopting a strict closed form solution. Frequency domain amplitude-frequency characteristic analysis is adopted, a motion corresponding coefficient and a motion amplification coefficient are introduced to quantitatively evaluate the influence of the soil layer thickness and the soil layer rigidity ratio on the anti-seismic performance of the end bearing pile, and theoretical support is provided for pile foundation optimization design.

The invention provides a seismic oscillation intensity parameter prediction method considering a complex terrain effect, and belongs to the technical field of seismic engineering. According to the method, terrain data such as elevation, gradient and curvature are introduced, a comprehensive terrain effect coefficient formula is constructed, an existing seismic oscillation prediction equation is corrected, the amplification effect of the terrain on seismic oscillation is comprehensively considered, and seismic oscillation intensity parameters of a complex terrain area can be predicted more accurately.

The invention provides a method for determining seismic oscillation parameters of a deep and thick covering layer site, and belongs to the field of geotechnical engineering and seismic engineering.The method comprises the steps that firstly, the thickness and the average shear wave velocity of a site covering layer are obtained, and the site characteristic period is calculated; then establishing a site related target spectrum model comprising an ascending section function, a resonance section function and a descending section function; determining key control parameters of each function based on the site characteristic period, wherein the key control parameters comprise an ascending section inflection point period, a resonance section center period and a descending section attenuation index; integrating the three functions through a smooth connection technology to form a complete target spectrum; and finally generating site specific seismic oscillation parameters based on the target spectrum. Through systematic model construction and a parameter determination mechanism, accurate description of the seismic oscillation characteristics of the deep and thick covering layer field can be realized, the physical rationality and engineering applicability of the seismic oscillation parameters are improved, and a reliable basis is provided for engineering aseismic design.

The invention relates to the field of rock and soil earthquake engineering, and particularly discloses a three-way layered shearing assembly type model box for simulating an underground structure under earthquake action, which comprises eleven layers of H-shaped aluminum alloy rectangular frame laminated structures, eight groups of integrated EG series four-row steel ball linear guide rails, high-strength self-resetting springs and MEMS displacement sensor three-way shearing connecting devices, the model box adopts a bolt assembly type design, and is provided with a 3m * 3m Q345B steel plate bottom plate and a cross H-shaped steel external limiting frame. The device can synchronously simulate X / Y / Z three-direction six-degree-of-freedom seismic actions, realizes submillimeter displacement control through white noise frequency sweeping calibration, effectively inhibits boundary reflected wave interference, is suitable for seismic performance research of structures such as underground pipe galleries and subway stations, and has the advantages of rapid disassembly and assembly and accurate reproduction of three-dimensional coupling vibration.

The present application relates to the technical field of earthquake engineering, and provides a method for determining the seismic response of an engineering site under the action of a seismogenic fault, comprising the following steps: S1, determining the bedrock surface of the engineering site; S2, establishing the scale range of the engineering site; S3, selecting near-fault ground motion records and site categories for inputting seismic waves; S4, outputting the site response under the input of ground motion; and S5, outputting the site response under the input of dislocation. 地表 The dislocation input of the finite element software site earthquake is used to obtain the surface displacement deformation characteristics and select the maximum displacement value D 位移 The present application provides a method for selecting near-fault ground motion records considering dislocation in a consistent manner for the site classification of the input mode of the calculation and analysis of the seismogenic fault engineering site, respectively strips the seismic input of the acceleration time history and the bedrock dislocation amount input, and is closer to the actual earthquake disaster, so as to provide reasonable design parameters for the seismic design of the engineering structure and the design of the anti-fracture capacity.

The present application belongs to the field of geotechnical engineering disaster prevention and mitigation and earthquake engineering test technology, and relates to a shaking table test method considering time-varying degradation of seismic performance of anchored rock slope. The method first constructs a dynamic performance time-varying degradation model based on the attenuation law of the interface bonding force of the anchoring system and the yield resistance of the free section reinforcement; by adjusting the proportion of the rock similar material and using a staged stiffness anchoring system, the physical equivalent simulation of interface degradation and component yield resistance reduction is realized respectively. The core of the present application is that before the shaking table applies the seismic wave, the anchoring performance degradation of the supporting structure is simulated actively in advance, so as to reproduce the real evolution path that the bearing capacity of the anchoring system decreases first, leading to stress redistribution and cumulative damage of the slope, and then suffering from sudden seismic load, breaking through the limitation of traditional test which only simply simulates static low bearing capacity. The present application effectively realizes the space-time coupling of "static time-varying degradation accumulation" and "instantaneous seismic dynamic action", solves the problem of simulation distortion of interface degradation, and provides a reliable test method for dynamic stability evaluation and reinforcement design of long-term service anchored slope.

The invention discloses a two-dimensional seismic performance evaluation method, device and product for a large-diameter shield tunnel, and relates to the field of tunnel engineering and seismic engineering, the method comprises the steps that a performance evaluation matrix with two orthogonal dimensions is constructed, and the two orthogonal dimensions are the main lining damage level and the internal component damage level; obtaining a main lining damage index and an internal component damage index of the target large-diameter shield tunnel under different seismic intensities; determining a joint condition probability density function between the main lining damage index and the internal component damage index under each earthquake intensity, thereby determining the probabilities of the target large-diameter shield tunnel in different states under the corresponding earthquake intensity; and generating an earthquake performance evaluation result of the target large-diameter shield tunnel according to the probability that the target large-diameter shield tunnel is in different states under each earthquake intensity. According to the method, the seismic performance of the target large-diameter shield tunnel facing different seismic intensities can be accurately and finely evaluated.

The application discloses a building seismic performance evaluation method, device and equipment and a storage medium, relates to the technical field of earthquake engineering, and discloses a building seismic performance evaluation method, which comprises the following steps: acquiring observation acceleration of a target building, performing zero supplement processing on the observation acceleration to obtain reference acceleration; expanding the reference acceleration in series according to a preset acceleration characteristic function to obtain expansion coefficients; obtaining a target velocity time history and a target displacement time history according to the preset displacement characteristic function, the preset velocity characteristic function and the expansion coefficients; and evaluating the seismic performance of the target building according to the target velocity time history and the target displacement time history. The method generates stable reference acceleration from observation acceleration to obtain accurate target velocity time history and target displacement time history, avoids drift error in the traditional numerical integration process, ensures the physical authenticity and accuracy of the velocity and displacement time history, provides reliable basis for performance-based seismic design, and can more accurately evaluate the seismic performance of the target building.

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.

The invention belongs to the technical field of earthquake simulation tests, and particularly relates to a triaxial compression earthquake test sample preparation and test method which comprises a fault model. The fault model is composed of two beveled models which are in the same shape and are beveled along the diagonal line of the cross section on a cube with an ac * ac square cross section, the contact face of the two beveled models, namely the opposite face formed after beveled along the diagonal line, is a fault face, the size of the fault face is 1.414 ac * ac, and the size of the fault face is 1.414 ac * ac. By controlling the stress, temperature and water content conditions of the sample, the invention aims to improve the accuracy and reliability of earthquake simulation, and the control capability enables the earthquake simulation test under laboratory conditions to reproduce the mechanical behavior of deep rock in the earthquake process more truly. Therefore, more accurate data support is provided for understanding of an earthquake mechanism, assessment of earthquake risk and guidance of earthquake engineering practice.

The invention discloses a method and a system for analyzing vibration of a pile foundation in saturated soil under the action of an earthquake load, a storage medium and application of the storage medium. Relates to the crossing field of geotechnical engineering and seismic engineering, and mainly researches the motion response of a large-diameter end bearing pile in a transverse isotropic viscoelastic saturated soil body under the action of seismic longitudinal waves. Based on a de Boer porous medium theory, a fractional order viscoelastic constitutive model is introduced into a transverse isotropic saturated soil dynamic control equation, and a displacement-pore pressure coupling wave equation is established. A variable separation method is adopted for analyzing and deducing counter force of soil around a pile, longitudinal vibration of the pile is simulated into a Rayleigh-Love rod model considering the transverse inertia effect, scattered wave components in a total wave field are separated through a wave field decoupling technology, and a soil-pile interaction mechanism is accurately analyzed. The method provides an innovative theoretical framework for the analysis of the fluctuation-driven soil-pile system in the coastal soft soil area, and is particularly suitable for high-precision evaluation of the interaction between the pile foundation and the saturated soil body power in earthquake engineering.

This invention provides a method and apparatus for assessing the economic losses of buildings under the coupled effects of earthquakes and secondary fires, relating to the field of earthquake engineering technology. The method includes: obtaining the post-earthquake damage state of the building structure through nonlinear time history analysis based on earthquake motion input data; establishing a secondary fire CFD analysis model; determining the highest probability ignition point based on the location of flammable and explosive components and performing CFD analysis, outputting temperature field data and smoke propagation data for the structural solid part, non-structural solid part, and outer surface part of each component; analyzing the temperature field data to obtain the damage state of the structural and non-structural parts of the component; obtaining the smoke contamination status of the outer surface of the component based on the smoke propagation data, and then calculating the economic loss of each component, summing up the losses of all components to obtain the total building loss. This invention fills the technical gap in multi-hazard coupled loss assessment, providing a more effective and scientific decision-making basis for post-earthquake emergency response and reconstruction.

The application discloses a kind of ground fissure zone tunnel lining earthquake response and damage evolution simulation method and equipment, it is related to the field of earthquake engineering.The present application is based on the constructed shaking table model, and a numerical simulation model is established by using the modified lattice spring-discrete crack network coupling numerical method, then, MLSM-DFN model of the ground fissure zone tunnel structure profile is constructed based on the numerical simulation model, and the earthquake response and damage simulation of the ground fissure zone tunnel lining are completed based on this model, the expansion and propagation law of the ground fissure can be completely and truly simulated, the activity development trend of the ground fissure can be accurately predicted and quantitatively characterized, meanwhile, the influencing factors and action mechanism of the coupled dynamics response induced tunnel structure failure can be accurately judged, to better, targetedly carry out tunnel structure seismic design provide more explicit theoretical basis and technical support.

The invention discloses a self-resetting buttress device for a spanning section of an overground pipeline, and belongs to the field of rock-soil earthquake engineering, the self-resetting buttress device comprises an upper bearing plate, a lower bearing plate and two outer cylinders, the outer cylinders are arranged between the upper bearing plate and the lower bearing plate, springs are arranged between the two outer cylinders and the lower bearing plate, and the springs are arranged between the two outer cylinders and the lower bearing plate. A first circular tooth plate and a second circular tooth plate which are oppositely arranged are arranged in the outer cylinder, a first circular rack and a second circular rack are arranged on the two sides of the first circular tooth plate and the two sides of the second circular tooth plate, and first bolts are arranged at the two ends of the first circular rack and the two ends of the second circular rack. According to the self-resetting buttress device for the overground pipeline crossing section, the problems that the overground pipeline is large in residual displacement, difficult to repair and the like after an earthquake are solved, and under the synergistic effect of the self-resetting mechanism and the energy consumption assembly, the destructive effect of the earthquake on the pipeline is reduced, meanwhile, residual deformation is reduced, and the recovery capacity is improved.

The present invention relates to the field of earthquake engineering technology, and specifically discloses a design method for low-cycle repeated loading tests of pile foundations simulating the oblique incidence of seismic waves. First, a gravity compensation component and an angle compensator are used to ensure that the test results only reflect the effect of the obliquely incident seismic waves, eliminating the influence of non-seismic wave forces. Then, density anomaly factors and water content anomaly factors are obtained through the processing of soil data, and the pile foundation bearing capacity signal is calculated based on this. Based on the bearing capacity signal, the energy dissipation data and displacement data of the pile foundation are further obtained, and these data are comprehensively analyzed to calculate the comprehensive seismic performance score of the pile foundation. If the score is lower than the preset threshold, the test conditions are optimized by adjusting the obliquely incident seismic waves at different angles until the seismic performance of the pile foundation reaches above the predetermined standard. The present invention can improve the test accuracy and reliability and optimize the seismic performance of the pile foundation.