162 results about "Seismic damage" patented technology

The invention relates to a b ridge seismic analyzing method based on seismic risk assessment, a spectral acceleration Sa in a ground motion intensity index is mainly adopted, Pup (Imi) is guided to be a seismic damage probability when the intensity of a bridge structure is IM, [delta][lambda] H,i a is seismic risk contribution parameter under seismic fortification levels, the Pup (Imi) and the [delta][lambda] H,I are utilized to calculate a seismic risk value [lambda] UP of a bridge structure, and anti-seismic property of the bridge structure is assessed. According to the invention, seismic risk values of dangerous components of the bridge are solved through the method provided by the invention, according to structural risk assessment relevant regulation, the anti-seismic properties of components of the bridge are researched, comparative study can be performed on seismic risk values of the components under different bridge seismic mitigation and isolation measures, and feasibility and applicability of different bridge seismic mitigation and isolation measures are assessed.

The invention discloses a self-resetting multidimensional damping pipe pile group foundation and a construction method, and belongs to the technical field of building seismic resistance. The foundation comprises a bearing platform, a PHC (prestressed high strength concrete) pipe pile, damping supports and a damping ground anchor, wherein the damping supports are connected between peripheral foundation piles and the bearing platform, and each damping support comprises an upper seal plate, a lower seal plate, a soft steel core rubber pad, radial reset springs, an outer sleeve and an inner sleeve and extends into a groove in the bottom of the bearing platform, and the bottom of each damping support is arranged at the top of the corresponding pile through the corresponding inner sleeve in a sleeving manner for fixing; the damping ground anchor below a central pipe pile comprises a shearing damper and anchor rods, the shearing damper comprises vertical reset springs, soft steel clamps and steel clamping grooves, the ground anchor is used for penetrating into the soil layer at a pile end of the central pipe pile, and the upper end of the ground anchor is anchored on the top surface of the bearing platform through a steel pulling cable. By means of the foundation and the construction method, vibration energy during reciprocating motion of seism is effectively absorbed, the multidimensional damping effect of the pile group foundation is realized, pile-bearing platform joints with ductile energy consumption capacity are formed, and the problem that pipe pile heads are prone to seismic damage under the action of strong seism is solved.

The invention discloses a building seismic damage analysis method, and relates to the field of seismic damage assessment. The method comprises the following steps of: setting a contour sampling interval, extracting a point cloud set of different height of a building, then, obtaining a contour section profile line through a convex hull algorithm, and converting three-dimensional point cloud of the building into a two-dimensional contour polygon sequence; extracting shape discrete parameters of the building; and calculating standard deviation of building shape parameters, and through a Fisher discriminant analysis, performing statistics on the standard deviation obtained in a step S22 or a step S23, thereby obtaining a discrimination function corresponding to three types of degree of damage of the building. According to the invention, edge extraction, shape clustering and discriminant analysis are fused, and problems in building contour polygon sequence extraction, shape discrete parameter calculation, irregular building block segmentation and damage analysis are solved effectively.

The invention relates to an anti-seismic bridge support. The support comprises a first-stage anti-seismic shock-absorbing structure and a second-stage anti-seismic shock-absorbing structure, the first-stage anti-seismic shock-absorbing structure drives baffle rods to move upwards through the rotation of cams, and jacking rods cooperate with baffle blocks at the two sides of the lower portion of across beam to limit the horizontal displacement of the cross beam; the second-stage anti-seismic shock-absorbing structure drives first gears to rotate through the vertical displacement of the jackingrods in the baffle rods and then transmits the rotation to first bevel gears through retractable universal couplings, the first bevel gears are connected with second-stage anti-seismic devices to achieve bevel self-locking of pistons and pressing blocks, and therefore second-stage anti-seismic protection is achieved; meanwhile, through a bridge pier is protected through a linkage mechanism underthe cross beam; the anti-seismic bridge support limits the displacement of the bridge cross beam well, the beam falling risk is avoided, and the structural seismic damage and the structural damage degree are reduced; meanwhile, the anti-seismic bridge support achieves two-stage seismic protection, the anti-seismic capability of a bridge is greatly improved, the buffer protection capability of thebridge pier during an earthquake can also be improved, and the anti-seismic effect is remarkable.

A multidimensional seismic isolation layer/belt structure applicable to a multilayer construction foundation is characterized in that in the multidimensional seismic isolation structure, a seismic isolation layer is arranged at the bottom part of a building (between a ground base and a foundation) to prevent seismic waves; a slipping seismic isolation layer is arranged between the upper part of the building foundation and a foundation ring beam, so that seismic horizontal shear waves can be absorbed and relieved through slippage; meanwhile, a seismic isolation belt is arranged between the periphery of the building foundation and the soil layer to absorb and relieve the seismic horizontal waves, so that the seismic isolation layer arranged below the foundation and the slipping isolation layer arranged above the foundation can act together with the seismic isolation layer at the periphery of the foundation to prevent the acceleration peak value transmitted to the building and the predominant period leaving the site, influences of the seismic waves on the building are significantly reduced, and further the purposes of protecting house structure and equipment in the house from being damaged by the seismic and guaranteeing lives and safety of personnel in the house are achieved.

The invention provides a girder-falling prevention device. The device is arranged on a bridge girder base body and comprises a fixed guide rail, a fixed device and an elastic-plastic device, wherein the fixed guide rail is connected with a bridge girder body; the fixed device is connected with the base body; and the elastic-plastic device comprises a first end in clearance fit with the fixed guide rail and a second end connected with the fixed device. The device has the following advantages that: the device has a simple and reliable structure, is clear in force transferring and bearing and can achieve the effects of preventing girder from falling, dissipating seismic energy and resisting drawing, thus protecting the bridge girder in multiple directions, reducing seismic damage on the bridge girder and guaranteeing life and property safety.

The invention provides a seismic damage investigation system based on a smartphone and belongs to the technical field of seismic damage investigation. The system comprises three modules, i.e., a mobile phone module, a web page module and a database module, wherein the mobile phone module is mainly used for acquiring data, the web page module is mainly used for transmitting, displaying, viewing and managing data and integrating system functions, and the database module is mainly used for loading a database. The mobile phone module and the web page module can be used for carrying out data uploading and downloading directly, and the web page module and the database module can be used for carrying out writing and reading on the database. The system covers a plurality of links such as data acquisition, reduction, visualization and information sharing, so that human intervention is greatly reduced, efficient and convenient building seismic damage investigation is achieved, and a convenient, efficient and intelligent integrated tool is provided for the building seismic damage investigation.

The invention discloses a rock burst danger monitoring and early warning method based on dynamic and static combined stress analysis, which is used for monitoring and early warning rock burst danger based on a rock burst mechanism induced by superposition of a dynamic load effect and a static load effect in combination with a dynamic and static combined effect. According to the dynamic and staticcombined effect, parameter weights of a dynamic load effect parameter of seismic wave attenuation accumulation reconstruction, a static load effect parameter of seismic wave CT inversion and a staticload effect parameter of micro-seismic damage reconstruction are determined respectively; and a dynamic and static combined stress coefficient is calculated by adopting a weighted average method, anda final dangerous area and a dangerous degree thereof are comprehensively determined by combining the dynamic load stress coefficient of the instantaneous dynamic load stress increment of the mine pressure. The method has the advantages of clear calculation model and high universality and operability, realization of quantitative analysis of prediction of the rock burst dangerous area and the dangerous degree of the rock burst dangerous area, and good application feasibility.

A lattice box type mild steel damper is an energy dissipation and shock attenuation device mainly applied to the field of bridge and structural engineering. The lattice box type mild steel damper is formed by an upper connection steel plate, cover plates, hourglass-shaped mild steel plates and a lower connection steel plate. The transverse and longitudinal hourglass-shaped mild steel plates form a lattice structure with the lower portion connected with the lower connection steel plate and the upper portion connected with the upper connection steel plate through the cover plates. The lattice structure can be deformed inside and outside a plane at the same time by the aid of the hourglass-shaped mild steel plates, so that more energy can be absorbed and dissipated. The lattice box type mild steel damper has the advantages that seismic energy transmitted to structures can be partially dissipated by own deformation of the lattice box type mild steel damper, and accordingly main structures and critical components of bridges and buildings are protected from seismic damage, and structural deformation can be controlled reasonably; moreover, the lattice box type mild steel damper can be replaced quickly after earthquake.

The invention relates to a structure for strengthening anti-seismic performance of a steel frame, in particular to an anti-seismic structure of an energy-consumption angle brace. The anti-seismic structure of an energy-consumption angle brace comprises a frame beam and a frame column, wherein the node position of the frame beam and the frame column is provided with an energy-consumption angle brace plate; and the contact surface between the energy-consumption angle brace plate and the frame beam as well as the contact surface between the energy-consumption angle brace plate and the frame column are respectively fixedly connected by a connecting plate. The anti-seismic structure of an energy-consumption angle brace is favorable for flexible arrangement of frame structure space and is favorable for the arrangement and construction of a filler wall. Under the condition of no seism or under the condition of quaking frequently, the energy-consumption angle brace can perform the action of acommon angle brace to protect the node; under the action of seldom-occurred seism, when the beam and the column have great relative rotation, the energy-consumption plate of the energy-consumption angle brace can yield, energy can be continuously adsorbed and consumed by being continuously pulled and stressed to yield, and on the effects of supporting the beam and the column and protecting the node can be kept so as to protect the safety of the node, avoid node damage and reduce seismic damage.

The invention relates to a bridge anti-seismic and damping device. The device comprises a first grade anti-seismic and damping structure and a second grade anti-seismic and damping structure, the first grade anti-seismic and damping structure drives a stop lever to move upward through the rotation of a cam, and the cooperation of a top rod and check blocks at the two sides below a cross beam limits the horizontal displacement of the cross beam; the second grade anti-seismic and damping structure drives a first gear to rotate through the vertical displacement of the top rod in the stop lever and then transmits the rotation to a first bevel gear through a telescopic universal coupling, and the first bevel gear is connected with a second grade anti-seismic device to achieve the inclined slopeself-locking of a piston and pressing block to achieve the second grade anti-seismic protection; and the protection of a bridge pier is achieved through a link mechanism under the cross beam. The bridge anti-seismic and damping device has the advantages that the displacement of the bridge cross beam is limited very well, the risk of the beam falling is avoided, the structural seismic damage is reduced, the structural damage degree is reduced, two-stage earthquake protection is achieved, the seismic capability of the bridge itself is greatly improved, the buffering protective capability of thepier can also be strengthened when the earthquake occurs, and the earthquake resistant effect is significant.

The invention relates to a reinforcing structure and a reinforcing method for a door and window opening of a brick-and-concrete house and belongs to the technical field of seismic reinforcement. According to the reinforcing method, after an original door and window is removed, a closed supporting steel frame playing a role in reinforcing the door and window opening is arranged on an original wall, the supporting steel frame consists of four groups of parallel steel channels, each group is formed by parallel and spaced arrangement of two steel channels, bottom plates of the two parallel steel channels in each group are connected through a batten plate, a base plate is arranged on each batten plate, and an anchor bolt sequentially penetrates through each base plate, each batten plate and the gap between the two parallel steel channels in each group to be anchored and connected with the original wall; every two adjacent groups of parallel steel channels are welded with each other, and steel angle lacing bars are welded at corners of the supporting steel frame. By the aid of the reinforcing structure and the reinforcing method, the load-bearing and shear-resistant capacity of the wall can be improved, extension of wall cracks during an earthquake can be effectively prevented, the seismic damage degree of the door and window opening can be reduced, and the safety performance of the brick-and-concrete house can be guaranteed.

The invention provides a house earthquake damage matrix curve analysis method based on earthquake motion parameters and a corresponding system. Based on the corresponding relationship between the intensity and the seismic oscillation parameters, a maximum likelihood estimation method is adopted; A correct house vulnerability matrix or a damage ratio result of actual earthquake damage statistics isconverted into a dual-parameter vulnerability curve, the defect based on the intensity vulnerability curve is overcome, and a simpler and more convenient way for obtaining the vulnerability curve isprovided for the structural types, difficult to simulate and analyze, of civil engineering, bricks, stones and the like. And on the basis of the relationship between the intensity and the seismic oscillation parameters, seismic vulnerability curve characteristic parameters of various house structures are given, and basic data can be provided for house building seismic damage assessment based on the seismic oscillation parameters. The method and the system are high in reliability and wide in application range, and can be used for verifying and perfecting an existing vulnerability matrix or curve, so that the method and the system can better serve the fields of rapid evaluation of earthquake disasters, risk evaluation, insurance estimation and the like.

The invention provides a method for evaluating the earthquake damage degree of a reinforced concrete column based on machine learning. The method comprises the steps: firstly obtaining an apparent earthquake damage parameter and a component parameter according to a whole-process apparent damage image of a pseudo-static test of a reinforced concrete column component; then, according to the pseudo-static test hysteretic curve data of the reinforced concrete column component, establishing a comprehensive evaluation index of the earthquake damage degree of the reinforced concrete column, which has fixed upper and lower limits and can accurately reflect the nonlinear accelerated accumulation phenomenon of the component in the overall damage development process; and finally, establishing a deep neural network model of comprehensive evaluation indexes of apparent seismic damage parameters, component parameters and seismic damage degrees, and inputting the apparent damage parameters and size information of the component into a trained machine learning model to directly predict the seismic damage degree of the component. Finally, intelligent evaluation of the earthquake damage degree of the reinforced concrete column is achieved, and meanwhile the defects that a manual evaluation method based on expert experience wastes time and labor and is insufficient in accuracy and safety are overcome.

The invention provides a method and device for evaluating the function toughness for road traffic after an earthquake, and relates to the technical field of toughness evaluation. The method comprisesthe steps: determining a target transportation network to be evaluated, and acquiring a seismic damage situation of the target transportation network; segmenting the target transportation network to obtain multiple road segments; obtaining the area of each road segment and the recovery time after the earthquake; calculating the recoverability weight coefficient of each road segment according to the recovery time after the earthquake; calculating a functional toughness index of the target transportation network according to the area and recoverability weight coefficient of each road segment. According to the method and device, the target transportation network is divided into the road segments, and the area of each road segment and the recovery time after the earthquake are obtained. The method and device can calculate the recoverability weight coefficients to obtain the functional toughness index of the target transportation network, and an objective evaluation method for the post-earthquake functional toughness of road traffic is provided.

The invention discloses a self-resetting concrete-filled circular steel tube frame beam-column joint with energy dissipation parts on webs. The self-resetting concrete-filled circular steel tube framebeam-column joint comprises a concrete-filled circular steel tube column, an H-shaped steel beam, the energy dissipation parts, column connectors, grooved connectors, prestressed steel strands and ananchoring plate, wherein one end of each prestressed steel strand is anchored to the bottom of the corresponding grooved connector and the other end of each prestressed steel strand is anchored to the anchoring plate; and two ends of each energy dissipation part are connected to the corresponding web of an H-shaped short beam and the corresponding web of the H-shaped steel beam. Energy dissipation plates are arranged on the webs, so that the self-resetting concrete-filled circular steel tube frame beam-column joint has no influence on the construction of floors and is capable of being easilyreplaced after seismic damage and avoiding the situation that the energy dissipation plates are deformed resulting in cracking of the floors. Various processes such as welding of the column part and the grooved connectors of the self-resetting concrete-filled circular steel tube frame beam-column joint are completed in a factory, and then transported to a site for direct assembly after being prefabricated in the factory so as to realize prefabrication, reduce the labor cost and reduce the risk of overhead working.

The invention relates to a civil engineering structure, in particular to a reinforced concrete frame node comprising a reinforced concrete column, a reinforced concrete beam and a concrete floor, wherein angle cracks are arranged on the concrete floor around the intersection point of the reinforced concrete column and the reinforced concrete beam. Compared with the prior art, the invention has the advantages that the angle cracks arranged on the concrete floor around the intersection point of the reinforced concrete column and the reinforced concrete beam changes the structure of strong beam and weak column into a structure of strong column and weak beam, which enables the structure to perform an integral mechanism during earthquake damage and prevents continuous collapse of the structure during the earthquake damage.

The present invention relates to a stochastic simulation method for evaluating the reliability of an urban water supply network, and belongs to the technical field of seismic protection of the urban water supply network. The method comprises the following steps: calculating the pipeline seismic damage rate; generating the seismic damage scenario of the water supply network based on the Monte Carlosimulation; carrying out hydraulic analysis on the low-pressure water supply network based on the "step-by-step iteration" method; and calculating the seismic reliability index. According to the method provided by the present invention, without modifying a pipe network system file or writing an extra code, the hydraulic equations of the low-pressure pipe network can be solved, and the method hasthe advantages of high computational efficiency and good stability; and the method provides a new idea for hydraulic simulation and reliability evaluation of the water supply network during earthquake, and is of guiding significance to disaster relief and restoration after an earthquake.

This invention provides an inexpensive and plausible means of earthquake protection for personal residences in developing nations and economically distressed areas within the United States through the use of recycled tires containing a particular rock aggregate.

The invention discloses a bridge safety assessment method and system. The method includes the steps that the seismic damage index is firstly obtained; s seismic damage assessment result of a bridge is determined according to the seismic damage index; then the damage state of key components of the bridge is determined according to the seismic damage assessment result; finally, according to the damage state of all the key components, the structural damage state of the single bridge is determined. This method realizes double assessments, solves the problem about assessment accuracy, and also effectively solves the problem about assessment efficiency. In addition, by using a group correction method, the safety assessment of the structural damage state of the single bridge is transformed into that of bridge groups of the same type, and efficiency of the bridge assessment is thus improved.

The invention discloses a method for calculating track mapping deformation after earthquake-induced damage of a high-speed railway bridge. The method comprises the following steps: S1, establishing abasic hypothesis; s2, establishing a mapping relation calculation model between bridge structure deformation and ballastless track structure deformation; s3 model solution. The invention provides a method for calculating a mapping relation between track irregularity on a high-speed railway bridge and earthquake damage deformation of parts below the track, which is suitable for various track structural forms in a high-speed railway. Quantitatively analyzing a mapping relation between accumulated damage of key components of a pier, a support and a track structure and track surface deformation inthe high-speed railway bridge; the method overcomes the defect that nonlinearity of interlayer contact of a track structure is not considered in an existing method for calculating the mapping relation between track irregularity on a high-speed railway bridge and seismic damage deformation of components under the track; the method overcomes the defect that roadbed boundary conditions are not considered in an existing method for calculating the mapping relation between the track irregularity on the high-speed railway bridge and the seismic damage deformation of the under-track part.

The invention discloses a segment high pier bridge seismic reduction and isolation structure using inhaul cable supports arranged on double layers. The segment high pier bridge seismic reduction and isolation structure comprises a bearing platform, a lower pier body, an upper pier body and a beam body which are sequentially stacked from bottom to top; the segment high pier bridge seismic reduction and isolation structure further comprises the first inhaul cable support and the second inhaul cable support, the first inhaul cable support is arranged on the top surface of the upper pier body, the beam body is stacked on the top surface of the upper pier body through the first inhaul cable support, the second inhaul cable support is arranged on a butt joint surface of the lower pier body and the upper pier body, and the upper pier body is stacked on the lower pier body through the second inhaul cable support. The segment high pier bridge seismic reduction and isolation structure achieves the purposes of enhancing seismic reduction and limiting capability of a bridge system and meanwhile improving adaptability and diversity of seismic reduction and isolation technique used for high pier bridges, greatly reduces or even avoids seismic damage, is suitable for railway bridges, highway bridges and urban viaducts, and particularly has excellent seismic resistance for segment constructed high piers especially in high-intensity regions.

Described herein is a curtain wall system for multi-story buildings that is highly resistant to the damage caused by multidirectional swaying motions in building frames during an earthquake. In a conventional curtain wall system, each story is connected structurally to the stories above and/or below it. Earthquake-induced swaying motions of the building frame cause significant load transfers from story to story and cause such a conventional curtain wall system to be susceptible to earthquake damage. Not only does this damage necessitate expensive repairs, but serious threats to life safety are imposed when debris falls from a damaged wall system. In contrast, each story of the earthquake-immune curtain wall system is structurally isolated (i.e., decoupled) from adjacent stories, which produces the beneficial effects of minimizing wall system damage and the attendant risks of falling debris (in the forms of broken glass, stone, concrete, etc.) during an earthquake.

The invention discloses a high-elongation fiber concrete combined frame filled wall and a construction method thereof so as to solve the problem that the conventional common frame filled wall has fragility, low seismic resistance and low integrity. The high-elongation fiber concrete combined frame filled wall consists of a frame filled wall, short steel bars and high-elongation fiber concrete; and the construction method comprises the following steps of: during construction, building the frame filled wall, embedding a plurality of short steel bars into vertical mortar joints of the frame filled wall; and uniformly daubing the high-elongation fiber concrete on the surface of the frame filled wall. The seismic resistance, collapse resistance and deformation resistance of the frame filled wall are superior to those of the traditional frame filled wall, and brittle failure of the frame filled wall is difficult to occur; and meanwhile, according to the frame filled wall, partial seismic energy is consumed by utilizing the filled wall, so that the seismic damage of the frame is lightened, and the construction process is simple.

The invention discloses a damage controllable and seismic damage repairable steel column, comprising a steel column, dampers and first connecting plates. The steel column is connected with a bearing platform through end plates. The first connecting plates are fixed on the bearing platform. The steel column is connected with the first connecting plates through the dampers. Each damper comprises a plurality of demountable soft steel plates which are vertically placed. In the case of a small earthquake, the steel column and the dampers co-act and both the steel column and the dampers are elastic; in the case of a strong earthquake, with relatively good plasticity, the soft steel plates serving as energy-dissipating plates of the dampers can generate shearing yield, thereby absorbing most of earthquake energy, well protecting the steel column from being damaged and ensuring good aseismic performance; meanwhile, as the soft steel plates are demountable, after the strong earthquake, the damaged soft steel plates can be replaced with complete soft steel plates to provide post-earthquake quick repair.

The invention belongs to the anti-seismic technical field of building structures, and particularly relates to an energy storage shock-absorbing device comprising a connecting rod, and an upper sleeve and a lower sleeve which are arranged symmetrically; both ends of the connecting rod are respectively connected with the upper sleeve and the lower sleeve through energy storage springs; a first oblique slot and a second oblique slot with consistent orientation are respectively formed on the inner walls of the upper sleeve and the lower sleeve; telescopic latches which are matched with the first oblique slot and the second oblique slot are respectively arranged on both ends of the connecting rod; the telescopic latches can stretch in a direction which is vertical to the connecting rod. According to the shock-absorbing device, due to the matching of the telescopic latches and the oblique slots, the connecting rod can only move gradually in one way relative to the upper sleeve or the lower sleeve, so as to stretch or compress the energy storage springs in the sleeves, store seismic energy which is partially input into a building into the energy storage springs, consume partial seismic energy, and reduce the seismic damage. The device has the advantages of simple structure, strong durability, reusability and high installation applicability.

The invention discloses a seismic reliability design method for a building seismic support hanger. The seismic reliability design method is characterized by including: establishing a building-structure three-dimensional spatial analysis model of a to be installed seismic support hanger; generating N seismic-wave acceleration-time curves with probability; calculating floor response spectra at the center of the floor plan of the building structure under input of seismic waves; calculating extreme probability density function curves of floor plan response spectrum values on self-seismic periodicpoints; calculating the extreme probability density function curves of axial stress of an inclined strut of the seismic support hanger to acquire the reliability that the inclined strut of the seismicsupport hanger does not have seismic damage. The probability density evolution theory is combined with the floor response spectroscopy to perform the seismic design for the building seismic support hanger in terms of reliability, and seismic performance of the seismic support hanger is evaluated reliably and accurately.