Railway simply supported beam bridge strong earthquake response parameter analysis model

Abstract

The application provides a railway simply supported beam bridge strong earthquake response parameter analysis model, and a modeling method of the railway simply supported beam bridge comprises the following steps: performing structural analysis on the railway simply supported beam bridge, decomposing the railway simply supported beam bridge into multiple structural units, each structural unit comprising a pile foundation, a pier, a support structure, a fall prevention beam device, a beam structure and a fastening connecting piece; performing three-dimensional entity modeling on the pile foundation, the pier, the support structure, the fall prevention beam device, the beam structure and the fastening connecting piece, wherein the support structure, the fall prevention beam device and the beam structure are all set as elastic-plastic structural pieces; assembling the pile foundation, the pier, the support structure, the fall prevention beam device, the beam structure and the fastening connecting piece, wherein the pier is arranged on the pile foundation, the beam structure is connected to the pier through the support structure, the beam structure and the support structure are connected into one through the fastening connecting piece, and the fall prevention beam device is connected with the beam structure through the fastening connecting piece and is provided with an assembly gap with the support structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge engineering disaster prevention and mitigation technology, and particularly relates to a modeling method of a railway simply supported beam bridge and an analysis method of strong earthquake response parameters. BACKGROUND

[0002] The part provided in this part is merely background information related to the present disclosure, which is not necessarily prior art.

[0003] At present, in the current large-scale railway construction, the simply supported beam is an important content of railway design, especially in the railway bridge structure, the application proportion is large, and under the realistic conditions of short design period and short construction period, the optimization of the bridge structure design is an important work.

[0004] The analysis of the bridge structure usually adopts the following two methods:

[0005] One method is to set up seismic components in the bridge mechanism, but in the specific analysis process, the seismic components are not damaged, and a model is established according to the seismic response characteristics under the condition for analysis, but there is a certain limitation, and the disadvantage is that the bridge structure cannot enter the large deformation state because the seismic components are not damaged, so the analysis cannot be combined with the actual situation.

[0006] Another method is to set up energy dissipation components (such as viscous dampers) in the bridge structure, and a model is established according to the seismic response characteristics under the condition for analysis, which still has a certain limitation, and the disadvantage is that the seismic components are not considered to reduce the effect of the seismic load, and in actual engineering, the components generally have a certain seismic capacity when the bridge is designed to resist the impact force generated by small earthquakes, and only in the case of high earthquake grade and extremely severe working conditions, the seismic components will fail, and the shock absorption and energy dissipation device will play a role.

[0007] The above two analysis methods have a certain deviation from the actual situation of the bridge under strong earthquake conditions, which directly leads to low calculation accuracy and affects the design and improvement of the railway bridge. SUMMARY

[0008] The purpose of the present application is to at least solve how to more truly simulate the railway simply supported beam bridge under strong earthquake conditions to meet the dynamic nonlinear and large deformation analysis requirements of the railway simply supported beam bridge, and therefore a modeling method of a railway simply supported beam bridge is proposed.

[0009] The purpose is achieved by the following technical solutions:

[0010] The first aspect of the present application provides a modeling method of a railway simply supported beam bridge, which comprises:

[0011] performing structural analysis on a railway simply supported beam bridge, decomposing the railway simply supported beam bridge into a plurality of structural units, each of the structural units comprising a pile foundation, a pier, a support structure, a beam fall prevention device, a beam structure and a fastening connector;

[0012] performing three-dimensional solid modeling on the pile foundation, the pier, the support structure, the beam fall prevention structure, the beam structure and the fastening connector, wherein the support structure, the beam fall prevention structure and the beam structure are all set as elastic-plastic structural members;

[0013] assembling the pile foundation, the pier, the support structure, the beam fall prevention structure, the beam structure and the fastening connector, wherein the pier is arranged on the pile foundation, the beam structure is connected to the pier through the support structure, and the beam structure and the support structure are connected as a whole through the fastening connector, the beam fall prevention structure is connected with the beam structure through the fastening connector and is provided with an assembly gap with the support structure.

[0014] In addition, the modeling method of the railway simply supported beam bridge according to the present application can further have the following additional technical features:

[0015] In some embodiments of the present application, the modeling method of the railway simply supported beam bridge comprises:

[0016] performing structural analysis on a railway simply supported beam bridge, decomposing the railway simply supported beam bridge into a plurality of structural units, each of the structural units comprising a pile foundation, a pier, a support structure, a beam fall prevention device, a beam structure and a fastening connector;

[0017] performing three-dimensional solid modeling on the pile foundation, the pier, the support structure, the beam fall prevention structure, the beam structure and the fastening connector, wherein the support structure, the beam fall prevention structure and the beam structure are all set as elastic-plastic structural members;

[0018] assembling the pile foundation, the pier, the support structure, the beam fall prevention structure, the beam structure and the fastening connector, wherein the pier is arranged on the pile foundation, the beam structure is connected to the pier through the support structure, and the beam structure and the support structure are connected as a whole through the fastening connector, the beam fall prevention structure is connected with the beam structure through the fastening connector and is provided with an assembly gap with the support structure.

[0019] In some embodiments of the present application, the modeling method of the railway simply supported beam bridge further comprises:

[0020] The first support, the second support, the third support and the fourth support are arranged at different positions of the pier, and the first support, the second support, the third support and the fourth support jointly support the beam structure, and the first support, the second support, the third support and the fourth support are connected to the beam structure through the fastening connecting piece.

[0021] In some embodiments of the present application, the modeling method of the railway simply supported beam bridge further comprises:

[0022] The first support is arranged as a bidirectional movable support;

[0023] The second support is arranged as a longitudinal movable support;

[0024] The third support is arranged as a transverse movable support;

[0025] The fourth support is arranged as a fixed support.

[0026] In some embodiments of the present application, the modeling method of the railway simply supported beam bridge further comprises:

[0027] The first support, the first support, the second support, the third support and the fourth support are connected to the pier through a support piece respectively.

[0028] In some embodiments of the present application, the modeling method of the railway simply supported beam bridge further comprises:

[0029] The fastening connecting piece is arranged as a failure member; and / or the anti-falling beam structure is arranged as a failure member.

[0030] In some embodiments of the present application, the modeling method of the railway simply supported beam bridge further comprises:

[0031] In the process of three-dimensional entity modeling, C3D8R hexahedral mesh is selected and / or C3D6 wedge mesh is selected;

[0032] The support structure and the anti-falling beam structure are both modeled in detail by using entity elements.

[0033] The second aspect of the present application further provides a strong seismic response parameter analysis method, the strong seismic response parameter analysis method comprising:

[0034] Modeling according to the modeling method of the railway simply supported beam bridge as any one of the above;

[0035] Gradually applying a horizontal force to the beam structure, so that the support structure is in a linear elastic working stage, and recording the horizontal force and the maximum deformation of the support structure;

[0036] continue to apply the horizontal action force to the beam structure, and the support structure is in an elastic-plastic working stage;

[0037] continue to apply the horizontal action force until the support structure reaches a bearing limit and fails;

[0038] draw a curve graph with the horizontal action force as the longitudinal coordinate and the maximum deformation of the support structure as the transverse coordinate.

[0039] In some embodiments of the present application, the analysis method of the strong earthquake response parameter further comprises:

[0040] apply action forces in two opposite directions in the horizontal plane, and repeat the above steps to draw a first curve graph corresponding to the support structure.

[0041] In some embodiments of the present application, the modeling method of the railway simply supported beam bridge further comprises:

[0042] apply a horizontal action force to the beam structure, and the beam structure generates a horizontal displacement a;

[0043] continue to apply the horizontal action force to the beam structure, and the anti-collapse beam structure is in an elastic-plastic working stage, and record the horizontal action force and the maximum deformation of the anti-collapse beam structure;

[0044] continue to apply the horizontal action force to the beam structure, and the anti-collapse beam structure is in an elastic-plastic working stage;

[0045] continue to apply the horizontal action force until the anti-collapse beam structure reaches a bearing limit and fails;

[0046] draw a curve graph with the horizontal action force as the longitudinal coordinate and the maximum deformation of the anti-collapse beam structure as the transverse coordinate.

[0047] In some embodiments of the present application, the analysis method of the strong earthquake response parameter further comprises:

[0048] apply action forces in two opposite directions in the horizontal plane, and repeat the above steps to draw a second curve graph corresponding to the anti-collapse beam structure. BRIEF DESCRIPTION OF DRAWINGS

[0049] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings.

[0050] Figure 1A structural unit of a railway simply supported beam bridge constructed by the modeling method of the railway simply supported beam bridge provided by the application is shown;

[0051] Figure 2 A side pier, support structure and anti-falling beam structure constructed by the modeling method of the railway simply supported beam bridge provided by the application are shown in the schematic view;

[0052] Figure 3 Another side pier, support structure and anti-falling beam structure constructed by the modeling method of the railway simply supported beam bridge provided by the application are shown in the schematic view;

[0053] Figure 4 A structural schematic view of the railway simply supported beam bridge of the application is shown, wherein an assembly gap is shown;

[0054] Figure 5 A schematic view of the anti-falling beam structure of the railway simply supported beam bridge of the application is shown;

[0055] Figure 6 A structural schematic view of the first support of the railway simply supported beam bridge of the application is shown;

[0056] Figure 7 A structural schematic view of the second support of the railway simply supported beam bridge of the application is shown;

[0057] Figure 8 A structural schematic view of the third support of the railway simply supported beam bridge of the application is shown;

[0058] Figure 9 A structural schematic view of the fourth support of the railway simply supported beam bridge of the application is shown;

[0059] Figure 10 A first curve diagram drawn according to the analysis method of the strong earthquake response parameter provided by the application is shown;

[0060] Figure 11 A second curve diagram drawn according to the analysis method of the strong earthquake response parameter provided by the application is shown.

[0061] The reference signs are as follows:

[0062] 100, structural unit;

[0063] 110, pier;

[0064] 120, support structure; 121, first support; 122, second support; 123, third support; 124, fourth support;

[0065] 130, anti-falling beam structure; 140, beam structure; 150, fastening connector;

[0066] 160. support member;

[0067] a. assembly gap. DETAILED DESCRIPTION

[0068] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure can be embodied in various forms without being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present disclosure to those skilled in the art.

[0069] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0070] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0071] For the purposes of the description, a spatially relative term, as used herein, can be understood to refer to the orientation of an item in the figure in which that item is shown or described, such as "inner", "outer", "interior", "exterior", "lower", "bottom", "upper", "top", and the like. Such relative terms can be understood to be relative to the orientation as shown or described unless otherwise stated. For example, if an item is shown to be "below" another item, it can be understood that the item is oriented below the other item, unless otherwise stated. Such relative terms can include different orientations of the device, structure, or component in use or in an operational orientation position in use. For example, if the device depicted in the figures is turned over, such relative terms as "below" or "above" can be understood to mean "above" or "below" respectively. The spatially relative terms can be understood to encompass different orientations of the device in use or operation, depending on the particular context in which they are used. The spatially relative terms can be understood to include different orientations of the device, structure, or component in use or in an operational orientation position in use.

[0072] An embodiment of a modeling method of a railway simply supported beam bridge and an analysis method of strong earthquake response parameters of the railway simply supported beam bridge is given below in combination with the accompanying drawings, and the drawings and the embodiment are only used to explain the present application and cannot be understood as limiting the present application.

[0073] The present application provides a modeling method of a railway simply supported beam bridge, and the modeling method of the railway simply supported beam bridge comprises the following steps:

[0074] The railway simply supported beam bridge is subjected to structural analysis, and the railway simply supported beam bridge is decomposed into a plurality of structural units 100, each structural unit 100 comprising a pile foundation, a pier 110, a support structure 120, a fall prevention structure 130, a beam structure 140, and a fastening connecting piece 150.

[0075] The pile foundation, the pier 110, the support structure 120, the fall prevention structure 130, the beam structure 140, and the fastening connecting piece 150 are subjected to three-dimensional solid modeling, wherein the support structure 120, the fall prevention structure 130, and the beam structure 140 are all set as elastic-plastic structural pieces.

[0076] The pile foundation, the pier 110, the support structure 120, the fall prevention structure 130, the beam structure 140, and the fastening connecting piece 150 are assembled, wherein the pier 110 is arranged on the pile foundation, the beam structure 140 is connected to the pier 110 through the support structure 120, the beam structure 140 and the support structure 120 are connected as a whole through the fastening connecting piece 150, and the fall prevention structure 130 is connected with the beam structure 140 through the fastening connecting piece 150 and is provided with an assembly gap a with the support structure 120.

[0077] The modeling method of the railway simply supported beam bridge provided by the application can combine the seismic calculation analysis and the energy dissipation calculation analysis organically, and can meet the demand of the dynamic nonlinear and large deformation analysis of the railway bridge.

[0078] Figure 1 A structural unit of the railway simply supported beam bridge constructed by the modeling method of the railway simply supported beam bridge provided by the application is shown. Figure 1 As shown in the figure, according to the modeling method of the railway simply supported beam bridge provided by the application, after the structural analysis of the railway simply supported beam bridge, each structural unit 100 of the railway simply supported beam bridge is divided into a pile foundation, a pier 110, a bearing structure 120, a fall prevention device, a beam structure 140 and a fastening connector 150, each part is simplified by using a linear element, and finally the analysis model of the whole bridge is constructed, so that the macro phenomenon and the macro mechanical index of the whole bridge failure can be obtained.

[0079] The pile foundation, the pier 110 and the beam structure 140 are all three-dimensional space beam elements which can consider three translational and three rotational degrees of freedom, the bearing structure 120 and the fall prevention structure 130 are elastic-plastic connecting elements which can consider three translational and three rotational degrees of freedom, the linear element has the advantages of fewer nodes, elements and degrees of freedom, and can quickly converge when performing nonlinear time history analysis, so that the calculation and analysis efficiency can be improved.

[0080] The mutual influence and action between the bridge spans or the structural units 100 are considered by using the whole bridge model, so that the deficiency that the mutual influence and action between the bridge spans cannot be considered when the single pier 110 model is analyzed can be avoided.

[0081] The modeling method of the railway simply supported beam bridge provided by the application constructs the analysis model of the whole bridge, all components are three-dimensional solid elements of the whole bridge finite element model, the whole process of the bridge failure under the action of the earthquake can be simulated, the mechanical behavior of each component of the bridge in the process of the normal work and failure of the bearing structure 120, the sliding of the beam structure 140 and the collision of the fall prevention structure 130 can be analyzed, and the failure mechanism of the bridge under the action of the strong earthquake can be obtained.

[0082] The modeling method of the railway simply supported beam bridge provided by the application constructs the analysis model of the whole bridge, the fastening connector 150 includes shear pins, anchoring bolts and the like, and can keep normal work under the action of the frequent earthquake or the design earthquake, and can be used as the first line of defense for the structure seismic resistance; when a rare earthquake is encountered, the shear pins, the anchoring bolts and the like can be damaged, and can be used as the failure component to absorb part of the seismic energy, so that the seismic force can be reduced, the seismic calculation analysis and the energy dissipation calculation analysis can be combined organically, and when the shear pins, the anchoring bolts and the like are damaged, the fall prevention device enters the working state, and forms the second line of defense for the structure seismic resistance.

[0083] The modeling method of the railway simply supported beam bridge provided by the application can quickly restore the operation of the railway because the support structure 120 can be easily replaced after the earthquake.

[0084] The modeling method of the railway simply supported beam bridge provided by the application can realize the demand of dynamic nonlinear and large deformation analysis of the bridge by defining the slip type restoring force model, the restoring force model considering the hardening of steel and other parameters, and simplifies the analysis before and after the failure of the shear dowel, anchoring bolt and the like into one step, thereby improving the calculation efficiency and analysis efficiency to a certain extent.

[0085] In an embodiment of the application, the modeling method of the railway simply supported beam bridge further comprises: setting the first support 121, the second support 122, the third support 123 and the fourth support 124 at different positions of the pier 110, and the first support 121, the second support 122, the third support 123 and the fourth support 124 jointly support the beam structure 140, and the first support 121, the second support 122, the third support 123 and the fourth support 124 are all connected to the beam structure 140 through the fastening connecting piece 150.

[0086] In the formula, the first support 121, the second support 122, the third support 123 and the fourth support 124 are all connected to the beam structure 140 through the fastening connecting piece 150. Figure 6 The structural schematic diagram of the first support of the railway simply supported beam bridge of the application is shown; Figure 7 The structural schematic diagram of the second support of the railway simply supported beam bridge of the application is shown; Figure 8 The structural schematic diagram of the third support of the railway simply supported beam bridge of the application is shown; Figure 9 The structural schematic diagram of the fourth support of the railway simply supported beam bridge of the application is shown;

[0087] In an embodiment of the application, the modeling method of the railway simply supported beam bridge further comprises: setting the first support 121 as a bidirectional movable support; setting the second support 122 as a longitudinal movable support; setting the third support 123 as a transverse movable support; and setting the fourth support 124 as a fixed support. Figure 2 The structural schematic diagram of the one side of the pier 110, the support structure 120 and the fall prevention structure 130 constructed by the modeling method of the railway simply supported beam bridge provided by the application is shown; Figure 3 The structural schematic diagram of the other side of the pier 110, the support structure 120 and the fall prevention structure 130 constructed by the modeling method of the railway simply supported beam bridge provided by the application is shown;

[0088] In an embodiment of the application, the modeling method of the railway simply supported beam bridge further comprises: setting the fastening connecting piece 150 as a failure component; and / or setting the fall prevention structure 130 as a failure component.

[0089] In an embodiment of the present application, the modeling method of the railway simply supported beam bridge further comprises: in the three-dimensional entity modeling process, the support structure 120 and the anti-falling beam structure 130 are modeled in detail by using C3D8R hexahedral mesh and / or C3D6 wedge mesh.

[0090] In an embodiment of the present application, the modeling method of the railway simply supported beam bridge further comprises: the modeling method of the railway simply supported beam bridge further comprises:

[0091] The first support 121, the first support 121, the second support 122, the third support 123 and the fourth support 124 are connected to the pier 110 through the support 160 respectively.

[0092] According to the modeling method of the railway simply supported beam bridge provided by the present application, after the whole bridge is modeled, the following advantages are obtained:

[0093] Firstly, by using the three-dimensional entity unit model of the support structure 120 and the anti-falling beam structure 130, the whole process of mechanical behavior of the bridge under strong earthquake can be simulated.

[0094] Secondly, by setting the failure component, the seismic analysis calculation and the energy dissipation analysis calculation are organically combined, the reduction effect of the failure component on the seismic force is considered, and the actual situation is more close.

[0095] Thirdly, after part of the seismic components such as the shear pin and the anchoring bolt in the calculation model fail, the energy dissipation component or the anti-falling beam structure 130 plays a role, and the demand of dynamic nonlinear and large deformation analysis of the bridge can be realized.

[0096] Fourthly, by designing the restoring force model of the finite element unit of the failure component and the anti-falling beam structure 130, when the bridge is subjected to seismic design, the analysis of the working stage of the two types of components can be simplified into one step, and the calculation and analysis workload is reduced to a certain extent.

[0097] The present application further provides a strong earthquake response parameter analysis method, characterized in that the strong earthquake response parameter analysis method comprises:

[0098] Modeling according to the modeling method of the railway simply supported beam bridge in any one of the above embodiments;

[0099] Gradually applying a horizontal force to the beam structure 140 so that the support structure 120 is in a linear elastic working stage, and recording the maximum deformation of the support structure 120 generated by the horizontal force;

[0100] Continuing to apply the horizontal force to the beam structure 140 so that the support structure 120 is in an elastic-plastic working stage;

[0101] Continue to apply the horizontal force until the support structure 120 reaches the load limit and fails;

[0102] A curve is plotted with the horizontal force as the longitudinal coordinate and the maximum deformation of the support structure 120 as the lateral coordinate.

[0103] In an embodiment of the method for analyzing strong earthquake response parameters, forces are applied in two opposite directions in the horizontal plane, and the above steps are repeated to plot a first curve corresponding to the support structure.

[0104] Figure 10 A first curve plotted by the method for analyzing strong earthquake response parameters provided by the present application is shown in FIG. 1. Figure 10 As shown in FIG. 1, the first support 121, the second support 122, the third support 123, and the fourth support 124 are all set as failure members. When the horizontal seismic force is less than Fy, the support structure 120 is in the linear elastic working stage for the elements in the model. When the seismic force reaches Fy, the support structure 120 enters the elastic-plastic working stage. When the seismic force reaches Fu, the support failure member reaches the load limit state and is broken, and the corresponding deformation is δu. When the seismic force acts in the opposite direction, the process is the same as that of the positive direction, but when unloading and loading in the elastic-plastic stage, strain hardening effect occurs, that is, Fy increases.

[0105] In an embodiment of the present application, the method for analyzing strong earthquake response parameters of a railway further comprises:

[0106] A horizontal force is applied to the beam structure 140, and the beam structure 140 generates a horizontal displacement a;

[0107] The horizontal force is continuously applied to the beam structure 140, and the anti-collapse beam structure 130 is in the linear elastic working stage. The horizontal force and the maximum deformation of the anti-collapse beam structure 130 are recorded.

[0108] The horizontal force is continuously applied to the beam structure 140, and the anti-collapse beam structure 130 is in the elastic-plastic working stage.

[0109] The horizontal force is continuously applied until the anti-collapse beam structure 130 reaches the load limit and fails.

[0110] A curve is plotted with the horizontal force as the longitudinal coordinate and the maximum deformation of the anti-collapse beam structure 130 as the lateral coordinate.

[0111] In an embodiment of the method for analyzing strong earthquake response parameters, forces are applied in two opposite directions in the horizontal plane, and the above steps are repeated to plot a second curve corresponding to the anti-collapse beam structure 130.

[0112] Figure 11A second curve diagram drawn according to the analysis method of the strong earthquake response parameter provided by the application is shown in Figure 2. Figure 11 As shown in combination with Figure 1 , Figure 2 and Figure 3 , the transverse anti-collapse beam structure 130 is arranged in pairs, that is, after the failure of the failure member such as the bearing bolt or anchor bolt under the transverse horizontal seismic action, each pair of anti-collapse beam structures 130 provides horizontal supporting force in different directions against the reciprocating seismic force, preventing the beam structure 140 from collapsing.

[0113] Wherein a is the gap between the anti-collapse beam and the box girder, when the stiffness of the rubber pad or the friction force of the bearing failure surface is considered, the line segment can be provided with a certain slope, and when the rigid body moves smoothly, the line segment coincides with the horizontal axis, and the gap is simulated by using hook elements or friction contact elements in the finite element model; when the structural displacement exceeds the gap, the anti-collapse beam structure 130 starts to work, when the horizontal seismic force is less than Fy, the anti-collapse beam member is in the linear elastic working stage in the model, when the seismic force reaches Fy, the anti-collapse beam enters the elastic-plastic working stage; but when the anti-collapse beam reaches the ultimate bearing capacity and unloads and the reverse seismic force, the sliding effect D1(+)+a+a is generated, and then the other anti-collapse beam member acts on the reverse seismic force, and the same double-folded line restoring force model is also used.

[0114] The modeling method of the railway simply supported beam bridge and the analysis method of the strong earthquake response parameter provided by the application are aimed at the actual production problems and the problems existing in the existing calculation and analysis model, how to combine the actual simply supported beam bridge situation, optimize the analysis model, and quickly and effectively model, calculate and analyze in the design stage to meet the demand of dynamic nonlinear and large deformation analysis of the bridge, improve the design efficiency and calculation accuracy, and can be widely applied in practical engineering is the key problem that we urgently need to solve and research.

[0115] The above is only the preferred specific embodiment of the application, but the protection scope of the application is not limited thereto, any change or replacement easily thought of by those skilled in the art within the technical range disclosed by the application should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A method of modeling a railway simply supported beam bridge, characterized by, The modeling method of the railway simple beam bridge comprises the following steps: performing structural analysis on the railway simple beam bridge, and decomposing the railway simple beam bridge into a plurality of structural units, each of the structural units comprising a pile foundation, a pier, a support structure, a fall-prevention structure, a beam structure and a fastening connecting piece; setting a first support, a second support, a third support and a fourth support at different positions of the pier respectively, the first support, the second support, the third support and the fourth support collectively supporting the beam structure, and the first support, the second support, the third support and the fourth support being connected to the beam structure through the fastening connecting piece; setting the first support as a bidirectional movable support; setting the second support as a longitudinal movable support; setting the third support as a transverse movable support; setting the fourth support as a fixed support; setting the fastening connecting piece as a failure member; and / or, setting the fall-prevention structure as a failure member; performing three-dimensional entity modeling on the pile foundation, the pier, the support structure, the fall-prevention structure, the beam structure and the fastening connecting piece, the support structure and the fall-prevention structure being finely modeled by using entity units, wherein the support structure, the fall-prevention structure and the beam structure are all set as elastic-plastic structural members; assembling the pile foundation, the pier, the support structure, the fall-prevention structure, the beam structure and the fastening connecting piece, wherein the pier is arranged on the pile foundation, the beam structure is connected to the pier through the support structure, and the beam structure and the support structure are connected as a whole through the fastening connecting piece, and the fall-prevention structure is connected to the beam structure through the fastening connecting piece and is provided with an assembly gap with the support structure.

2. The method of modeling a railway simply supported beam bridge according to claim 1, wherein, The modeling method of the railway simple beam bridge further comprises the following steps: the first support, the first support, the second support, the third support and the fourth support are connected to the pier through a support piece respectively.

3. The method of modeling a railway simply supported beam bridge according to claim 1, wherein, The modeling method of the railway simple beam bridge further comprises the following steps: in the process of three-dimensional entity modeling, C3D8R hexahedral mesh and / or C3D6 wedge mesh are selected.

4. A method of analyzing a strong seismic response parameter, characterized by, The analysis method of the strong earthquake response parameter comprises the following steps: modeling according to the modeling method of the railway simple beam bridge in any one of claims 1-3; gradually applying a horizontal force to the beam structure, so that the support structure is in a linear elastic working stage, and recording the maximum deformation of the support structure generated by the horizontal force; continuing to apply the horizontal force to the beam structure, so that the support structure is in an elastic-plastic working stage; continuing to apply the horizontal force until the support structure reaches a bearing limit and fails; plotting a curve graph with the horizontal force as the longitudinal coordinate and the maximum deformation of the support structure as the transverse coordinate.

5. The analysis method of a strong seismic response parameter according to claim 4, characterized by, The analysis method of the strong earthquake response parameter further comprises the following steps: applying forces in two opposite directions in the horizontal plane, and repeating the above steps to plot a first curve graph corresponding to the support structure.

6. The analysis method of a strong seismic response parameter according to claim 4, characterized by, The analysis method of the strong earthquake response parameter further comprises the following steps: A horizontal force is applied to the beam structure, and the beam structure generates a horizontal displacement a; The horizontal force is continuously applied to the beam structure, the anti-collapse beam structure is in a linear elastic working stage, and the maximum deformation of the anti-collapse beam structure is recorded; The horizontal force is continuously applied to the beam structure, and the anti-collapse beam structure is in an elastic-plastic working stage; The horizontal force is continuously applied until the anti-collapse beam structure reaches a bearing limit and fails; A curve graph is drawn with the horizontal force as a longitudinal coordinate and the maximum deformation of the anti-collapse beam structure as a transverse coordinate.

7. The analysis method of a strong seismic response parameter according to claim 6, characterized by, The analysis method of the strong earthquake response parameter further comprises: The forces are applied in two opposite directions in the horizontal plane, and the above steps are repeated to draw a second curve graph corresponding to the anti-collapse beam structure.

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