CN115470661A - Supporting condition conversion anti-jacking simulation method in steel structure modular construction - Google Patents
Supporting condition conversion anti-jacking simulation method in steel structure modular construction Download PDFInfo
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Abstract
The invention discloses a support condition conversion anti-jacking simulation method in steel structure modular construction, which applies reverse load to a support point position when converting a support state, restores the actual vertical displacement of the support point position to eliminate the deformation transmitted to the next support point position, thereby avoiding the accumulated error in simulation analysis, accurately simulating the deformation stress mechanism of a module structure and avoiding the distortion of an analysis result; through more accurate simulation for the simulation condition is unanimous with actual construction, and then can appoint more accurate countermeasure, can satisfy actual construction demand and solve the problem in the actual construction, promotes construction quality and efficiency of construction.
Description
Technical Field
The invention relates to the technical field of building simulation construction, in particular to a supporting condition conversion anti-jacking simulation method in steel structure modular construction.
Background
When the large building is constructed in a modularized manner, simulation is generally needed to be used for analysis and research to find key difficulties in the construction process, so as to ensure the smooth operation of actual construction.
Aiming at the large building adopting the full-modular construction method, the structure, the stress, the working condition, the construction steps and the installation operation are extremely complex, the problems in the construction process need to be found through simulation construction, and specific measures are taken for the problems to ensure the actual construction. However, the existing simulation analysis method does not consider the stress mechanism that the steel structure module is in an elastic state in the temporary transportation and installation processes, and the elastic deformation can be recovered in the support transformation process, so that the geometric configuration distortion in the structural analysis is caused, and the problem of analysis result distortion caused by the accumulation of analysis errors due to the superposition of the support transformation times cannot be solved.
Particularly, aiming at frequent problems, the invention provides a supporting condition conversion anti-jacking simulation method in steel structure modularization construction to solve the problems.
Disclosure of Invention
The invention provides a method for simulating the conversion of supporting conditions to the reverse jacking in the steel structure modularization construction, which gradually eliminates the accumulative error of simulation analysis, accurately simulates the deformation stress mechanism of a module structure and avoids the distortion of an analysis result.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a supporting condition conversion anti-jacking simulation method in steel structure modular construction comprises the following steps:
s1, establishing a model: building a steel structure module model in simulation software, increasing construction parameters, and adding a module construction step;
s2, adding attributes: adding a support rod piece simulation support structure system at the support point position of the steel structure module, classifying and grouping the support rod pieces according to the construction steps, and increasing and decreasing the attributes of the support rod pieces to form a rigid rod piece;
s3, applying a load: determining that the steel structure module is in an initial state when being in a supporting state of a supporting rod group I, then applying constant load to the steel structure module in the current state, performing simulation operation of the supporting state I, acquiring downward disturbance deformation of the whole module in the current supporting constraint and loading states, and stopping simulation;
s4, obtaining a deformation amount: extracting the three-dimensional geometric deformation of the steel structure module in the step S3, and extracting the vertical deformation of the lower chord of the sub-truss positioned at the next support point in the three-dimensional geometric deformation;
s5, adding reverse load: adding a vertical reverse displacement load when the next construction step is carried out, wherein the value of the applied reverse displacement load is consistent with the vertical deformation value of the lower chord of the sub-truss in the step S3;
s6, converting and supporting: adding a support rod group II which plays a supporting role in the construction step, activating the applied constant load, removing the support rod member in the support state group I, performing simulation operation of the support state group II, acquiring downward disturbance deformation of the whole module in the current support constraint and loading state, and stopping simulation;
s7, obtaining a deformation amount: extracting the three-dimensional geometric deformation of the steel structure module in the step S6, and extracting the vertical deformation of the lower chord of the sub-truss positioned at the next supporting point in the three-dimensional geometric deformation;
s8, repeating the operation: the operations according to S3-S7 are carried out step by step according to the construction steps until the steel structural modules are supported by the permanent support structure.
Further, in the step S1, the construction parameters include three-dimensional geometric configuration, material properties, section characteristics, release conditions of the rod members and structural support point location constraints, and the real-time state of the steel structure module is determined according to the construction steps, including load change, dynamic acceleration change of the whole structure in the motion process, and change of support point locations under different construction site states.
Further, in step S2, the attributes of the support rod include a cross-sectional area, a cross-sectional modulus, and a weight attribute, and the attributes of the support rod are set to have no design strength, so that the support rod is always in a rigid state, and elastic deformation is realized.
Further, in step S2, the support rods are classified according to different support functions that the support rods are arranged at different support points, and the classified support rods are grouped.
Further, in step S3, the constant load applied to the steel structure module includes a total weight load and an external additional load.
Further, in step S2, the simulation operation of adding the support bar is as follows:
s21, extracting the deviation and the gap of the geometrical size of the chord connected with the support rod;
s22, fixing support restraint at the bottom of the support rod piece;
s23, simulating the rigidity of the temporary support structure in a mode of applying horizontal lateral spring rigidity to the support rod;
and S24, at the bearing position where the support rod is connected with the chord member, rotation and horizontal displacement release are given according to the actual construction state.
The invention has the following beneficial effects:
when the steel structure module is in supporting state conversion, reverse load is applied to the supporting point location, and the actual vertical displacement of the supporting point location is restored to eliminate the deformation transmitted to the next supporting point location, so that the accumulated error in simulation analysis is avoided, the deformation stress mechanism of the module structure is accurately simulated, and the distortion of the analysis result is avoided; through more accurate simulation for the simulation condition is unanimous with actual construction, and then can appoint more accurate countermeasure, can satisfy actual construction demand and solve the problem in the actual construction, promotes construction quality and efficiency of construction.
Drawings
FIG. 1 is a schematic flow chart of the construction steps of the present invention;
FIG. 2 is a schematic view of the reverse loading step of the present invention;
fig. 3 is a schematic view of the arrangement state of the support rods according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
As shown in fig. 1, 2 and 3, a method for simulating the conversion of the support condition in the steel structure modularization construction comprises the following steps:
s1, establishing a model: building a steel structure module model in SAP2000 simulation software, increasing construction parameters, and adding a module construction step;
s2, adding attributes: adding a support rod piece simulation support structure system at the support point position of the steel structure module, classifying and grouping the support rod pieces according to the construction steps, and increasing and decreasing the attributes of the support rod pieces to form a rigid rod piece;
s3, applying a load: determining that the steel structure module is in an initial state when being in a supporting state of a supporting rod group I, then applying constant load to the steel structure module in the current state, performing simulation operation of the supporting state I, acquiring downward disturbance deformation of the whole module in the current supporting constraint and loading states, and stopping simulation;
s4, obtaining a deformation amount: extracting three-dimensional geometric deformation of the steel structure module supported by the first support rod piece group in the step S3, and extracting vertical deformation of a sub-truss lower chord positioned at the next support point position in the three-dimensional geometric deformation;
s5, adding reverse load: adding a vertical reverse displacement load when the next construction step is carried out, wherein the value of the applied reverse displacement load is consistent with the vertical deformation value of the lower chord of the sub-truss in the step S3, so that the deformation of the supporting point position is eliminated through the reverse jacking;
s6, conversion support: adding a support rod group II which plays a supporting role in the construction step, activating the applied constant load, removing the support rod member in the support state group I, performing simulation operation of the support state group II, acquiring downward disturbance deformation of the whole module in the current support constraint and loading state, and stopping simulation;
s7, obtaining a deformation amount: extracting the three-dimensional geometric deformation of the steel structure module in the step S6, and extracting the vertical deformation of the lower chord of the sub-truss positioned at the next support point in the three-dimensional geometric deformation;
s8, repeating the operation: the operations according to S3-S7 are carried out step by step according to the construction steps until the steel structural module is supported by the permanent support structure.
The invention mainly simulates the simulation of the deformation of the steel structure when a large-scale steel structure module is constructed, in particular the simulation of the deformation of the steel structure when the supporting state is converted. Because the steel structure module has the nature that automatic resilience resets in the actual construction, when carrying out the support state conversion, the elastic deformation that its support point position and structure form produced can automatic recovery, but structure form can not automatic re-setting after bearing the load in simulation, consequently can lead to the deformation of next support point position to be recorded, and after repeated many times of simulation, accumulative deformation can make analog analysis data and structure actual data have great error, and then lead to simulation not conform to with the reality, the measure of answering that adopts simulation data to formulate has certain hidden danger, for example, the error is great or unable the use, consequently, the data that need simulation to obtain are the same with actual, just can realize corresponding purpose.
The action principle of the invention is as follows: the steel structure module is when bearing the load, except that the deformation on the support point position, still lead to next support point position because the transmission of load, lead to next support point position also to take place deformation, when applying new support and removing old support, elastic displacement takes place for the structural system under the effect of new support, but because the deformation that old support point position leads to exists, there is relative deformation between the elevation that can make new support point position and the actual elevation, and this relative deformation can produce the internal force to the support member of a plurality of positions, and then can lead to producing harmful inferior internal force, also can lead to simulation form and actual form to have the error equally, above-mentioned relative deformation can be along with the gradual accumulation of the conversion of support system, and then lead to the analog data error great. According to the invention, when a new support is added, reverse load is synchronously added to the support point position which is relatively deformed, so that the elevation of the new support point position is the same as the actual elevation, and further, the accumulation of relative deformation is avoided.
Further, in the step S1, the construction parameters comprise three-dimensional geometric configuration, material properties, section characteristics, release conditions of the rod piece and structural support point location constraints, and the real-time state of the steel structure module is determined according to the construction steps, wherein the real-time state comprises load change, dynamic acceleration change of the whole structure in the motion process and change of support point locations under different construction site states.
Further, in step S2, the attributes of the support rod include a cross-sectional area, a cross-sectional modulus, and a weight attribute, and the attributes of the support rod are set to have no design strength, so that the support rod is always in a rigid state, and the rod can be elastically deformed when the rod is in the rigid state.
Further, in the step S2, the support rods are classified according to different support functions that the support rods are arranged at different support points, and the classified support rods are grouped, so that the grouped support rods can be conveniently and uniformly called and dismantled.
Further, the steps S5 and S6 are performed synchronously, so that the reverse load and the second support rod set are effective at the same time.
As shown in fig. 2, when the steel structure module is in a supporting state of the supporting rod group, deformation of the steel structure is expanded to a next supporting point under the support of the supporting rod group i, and vertical deformation of a lower chord of the sub-truss at the next supporting point is caused, so that a reverse load is applied while the next supporting point is supported by the supporting rod group ii, the vertical deformation of the lower chord of the sub-truss is eliminated through the reverse load, harmful sub-internal force is avoided, and error accumulation is avoided.
Further, in step S3, the constant load applied to the steel structure module includes a total weight load and an external additional load.
As shown in fig. 3, further, in step S2, the simulation operation of adding the support rod is as follows, the support constraint of the support rod on the steel structure module is simulated, the support constraint state is ensured to be the same as the actual construction, the actual construction condition is more conformed to, and the support rod is also conveniently replaced in the simulation software:
s21, extracting the deviation and the gap of the geometrical size of the chord connected with the support rod;
s22, fixing support restraint at the bottom of the support rod piece;
s23, simulating the rigidity of the temporary support structure in a mode of applying horizontal lateral spring rigidity to the support rod;
and S24, at the bearing position where the support rod is connected with the chord member, rotation and horizontal displacement release are given according to the actual construction state.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (6)
1. A supporting condition conversion anti-jacking simulation method in steel structure modular construction is characterized by comprising the following steps:
s1, establishing a model: building a steel structure module model in simulation software, increasing construction parameters, and adding a module construction step;
s2, adding attributes: adding a support rod piece simulation support structure system at the support point position of the steel structure module, classifying and grouping the support rod pieces according to the construction steps, and increasing and decreasing the attributes of the support rod pieces to form a rigid rod piece;
s3, applying a load: determining that the steel structure module is in an initial state when being in a supporting state of a supporting rod group I, then applying constant load to the steel structure module in the current state, performing simulation operation of the supporting state I, acquiring downward disturbance deformation of the whole module in the current supporting constraint and loading states, and stopping simulation;
s4, obtaining deformation: extracting the three-dimensional geometric deformation of the steel structure module in the step S3, and extracting the vertical deformation of the lower chord of the sub-truss positioned at the next supporting point in the three-dimensional geometric deformation;
s5, adding reverse load: adding a vertical reverse displacement load when the next construction step is carried out, wherein the value of the applied reverse displacement load is consistent with the vertical deformation value of the lower chord of the sub-truss in the step S3;
s6, converting and supporting: adding a second supporting rod set which plays a supporting role in the construction step, activating the applied constant load, removing the supporting rods in the first supporting state set, performing simulation operation of the second supporting state set, acquiring lower disturbance deformation of the whole module in the current supporting constraint and loading states, and stopping simulation;
s7, obtaining a deformation amount: extracting the three-dimensional geometric deformation of the steel structure module in the step S6, and extracting the vertical deformation of the lower chord of the sub-truss positioned at the next support point in the three-dimensional geometric deformation;
s8, repeating the operation: the operations according to S3-S7 are carried out step by step according to the construction steps until the steel structural modules are supported by the permanent support structure.
2. The method for simulating the conversion of the support condition to the reverse top in the modular construction of the steel structure as claimed in claim 1, wherein the method comprises the following steps: in the step S1, the construction parameters comprise three-dimensional geometric configuration, material properties, section characteristics, release conditions of the rod piece and structural support point position constraints, and the real-time state of the steel structure module is determined according to the construction steps, wherein the real-time state comprises load change, dynamic acceleration change of the whole structure in the motion process and change of support point positions in different construction site states.
3. The method for simulating the conversion of the support condition to the reverse top in the modular construction of the steel structure as claimed in claim 1, wherein the method comprises the following steps: in the step S2, the attributes of the support rod member include a cross-sectional area, a cross-sectional modulus, and a weight attribute, and the attributes of the support rod member are set to have no design strength, so that the support rod member is always in a rigid state, and elastic deformation is realized.
4. The method for simulating the conversion of the support condition to the reverse top in the modular construction of the steel structure as claimed in claim 1, wherein the method comprises the following steps: in the step S2, the support rods are classified according to different support functions which are set at different support point positions, and the classified support rods are grouped.
5. The method for simulating the conversion of the support condition to the reverse top in the modular construction of the steel structure as claimed in claim 1, wherein the method comprises the following steps: in step S3, the constant load applied to the steel structure module includes a total weight load and an external additional load.
6. The method for simulating the conversion of the support condition to the reverse top in the modular construction of the steel structure as claimed in claim 1, wherein the method comprises the following steps: in step S2, the simulation operation of adding the support bar is as follows:
s21, extracting the deviation and the gap of the geometric dimension of the chord connected with the support rod;
s22, fixing support restraint at the bottom of the support rod piece;
s23, simulating the rigidity of the temporary support structure in a mode of applying horizontal lateral spring rigidity to the support rod;
and S24, at the bearing position where the support rod is connected with the chord member, rotation and horizontal displacement release are given according to the actual construction state.
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| CN116842624B (en) * | 2023-09-01 | 2023-11-14 | 北京城建集团有限责任公司 | Method for controlling and simulating vertical force of steel roof and support tower under wind suction effect |
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