CN103678820B - A kind of method for building structure geometric information model stress and strain model - Google Patents
A kind of method for building structure geometric information model stress and strain model Download PDFInfo
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Abstract
The invention discloses a kind of method for building structure geometric information model stress and strain model, comprise the steps: to arrange orchestration boundary point for building structure model；Different component according to this building structure carries out respective members stress and strain model, for framing component, then directly generate 2 node units, free mesh is used for floor or Base isolation system, for shear wall, then distinguish stalk and curved wall, judgement direct for stalk its can split and use map grids or free mesh, for curved wall, the most first curved surface is mapped to parameter plane, then can basis split and select map grids or free mesh, finally again parameter plane mesh mapping is returned luv space curved surface to obtain surface mesh, present invention achieves the stress and strain model of building structure geometric information model, can be used for arbitrarily complicated building structure, there is the strongest versatility.
Description
Technical field
The present invention relates to BIM (BIM) field, particularly relate to a kind of method for building structure geometric information model stress and strain model.
Background technology
Up to now, the development of computer technology had twice revolutionary contribution to building trade, was CAD(Computer Aided Design for the first time) technology replaces tradition drawing, is BIM (Building Information for the second time
Modeling), " BIM " generally it is translated as.The former is the transformation on instrument, and the latter is the transformation in thinking；The former only affects the design phase of building structure, and the latter will pass through the Life cycle (containing planning, design, construct, O&M etc.) of building structure.Therefore, for building trade, BIM is to impact the most up hill and dale and change.
The content that BIM comprises is very wide, and the safety analysis of wherein building structure and Analysis of Comfort are one of most basic contents.For such issues that, with computer, the Finite Element Method that grows up has become main stream approach.The basic thought of finite element is " first the most discrete after the most integrated ", therefore first structure must be carried out finite element discretization, i.e. stress and strain model for obtaining Finite-Element Solution.Stress and strain model from topological relation for can be divided into map grids (structured grid) and free grid (unstructured grid).Map grids refers to that the topological relation of internal node is consistent, say, that each internal node is all connected with equal number of unit, and the generating mode of this grid is the simplest, stress and strain model speed is quickly, mesh quality is also fine, but it is only applicable to special geometrical boundary, the most restricted in Practical Project.Free grid refers to that the topological relation of internal node can be any, the most each internal node can connect any number of node and unit, the generating mode of this grid is complex, but is theoretically adapted to arbitrarily complicated geometrical boundary, is therefore widely adopted in common software.
The most basic requirement of stress and strain model is " can adapt to all kinds of complex geometry boundary, grid discrete results can truly reflect original geometry model ", and in order to adapt to the requirement of finite element analysis, and stress and strain model also needs to meet following several condition:
Border sensitivity: because result of finite element is very sensitive to boundary mesh, need to preferentially ensure the quality of boundary mesh during stress and strain model, allows boundary mesh and boundary shape keep one to show uniformity and the Founder guaranteeing boundary mesh as far as possible；
Direction independence: rotate or change a given geometric areas and can not change the result of its stress and strain model, that is, the result of stress and strain model is determined by region shape, and with the selection of global coordinate is unrelated, to avoid the selection of global coordinate to affect result of finite element；
Singular point number is less and away from border: for quadrilateral mesh, singular point refers to the internal node that the number of unit being attached thereto is not equal to 4, and for triangular mesh, singular point refers to the internal node that the number of unit being attached thereto is not equal to 6.This is a problem the most crucial in stress and strain model, because the quantity of singular point and position will directly determine the final mesh quality after optimizing.As a rule, free mesh occurring, singular point is inevitable, but the number of singular point can be reduced by algorithm optimization as far as possible, avoid singular point to occur near border as far as possible, because boundary mesh is the most notable on the impact of finite element result simultaneously.
For the angle of finite element, stress and strain model is not only its premise and basis, and mesh quality also will directly affect reliability and the accuracy of finite element result simultaneously.It is true that at the commitment of finite element development, stress and strain model was once restriction finite element analysis application and a key factor of popularization, even if to today, grid automatic dividing technique is the most perfect.Just because of this, in recent decades, whole world Ge great colleges and universities, company, scientific research institution have all put into substantial amounts of manpower and materials and have carried out correlational study, have developed various different reseau-dividing algorithm.But these algorithms are substantially for general geometric model (especially mechanistic model), do not account for the particularity of (utilizing in other words) building structure, if it is the most very good to be used directly to carry out its effect of building structure stress and strain model, therefore the stress and strain model about building structure also needs to do to specialize in targetedly.
Summary of the invention
For the deficiency overcoming above-mentioned prior art to exist, the main purpose of the present invention is to provide a kind of method for building structure geometric information model stress and strain model, that takes into account the particularity of building structure, achieve the stress and strain model of building structure geometric information model, can be used for arbitrarily complicated building structure, there is the strongest versatility.
For reaching above and other purpose, the present invention proposes a kind of method for building structure geometric information model stress and strain model, comprises the steps:
Step one, arranges orchestration boundary point for building structure model；
Step 2, carries out component grid division according to the different component of this building structure, for framing component, then directly generates 2 node units；Free mesh is used for floor or Base isolation system；For shear wall, then distinguish stalk and curved wall, judgement direct for stalk its can split and use map grids or free mesh, for curved wall, the most first curved surface is mapped to parameter plane, then can basis split and select map grids or free mesh, the most again parameter plane mesh mapping is returned luv space curved surface to obtain surface mesh.
Further, in step 2, free mesh carries out pure tetragon free mesh for using pitching method to arbitrary plane pel.
Further, this free mesh comprises the steps:
Step 3.1, is formed along the fixed boundary of arbitrary plane figure according to the density of the grid of to be marked point and size and initializes boundary node；
Step 3.2, those nodes are formed a doubly linked list, select quadrilateral mesh from extenal fixation border inwards, inner boundary outwards starts to pave from level to level, after paving one layer, extenal fixation border is the most more newly formed mobile external boundary, and interior fixed boundary is the most more newly formed mobile inner boundary；
Step 3.3, with the moving boundary that formed as external boundary, inner boundary repeat abovementioned steps until fill up whole region；
Step 3.4, when mobile external boundary node is with mobile inner boundary nodal pitch close appointment sizing grid, start unit closed pair node closed-loop carries out sealing treatment；
Step 3.5, combines the weighting floating algorithm of Laplce and grid node is carried out floating by the constraint floating algorithm of Laplce.
Further, in step 3.1, the node paving outward border arranges counterclockwise, and the node inside paving border arranges in the direction of the clock.
Further, in step 3.4, sealing treatment includes that knot removal, unit open, unit closes, cell translation, element sides are deleted, Compound Topology optimization.
Further, in step 3.5, Laplace method calculates the floating vector of node routinely, then judge whether this floating can ensure that mesh quality increases, if it is this is performed floating, floating amount is halved by no person, if floating amount is too small after halving, abandons floating, otherwise repeat the above steps.
Further, in step 2, for Base isolation system, also need to process for restrained boundary problem in the territory of Base isolation system, this process operation includes following two parts: (1) is when paving grid, often generating a new unit and all can judge whether region exists isolated about end node, if had, processing this node；(2) initial restrained boundary is modeled to crack edge, then generate broad sense Close edges for this crack edge and perform grid and pave, and during for restrained boundary self intersection, then it is modeled to composite mode crack border according to joining position, then perform grid and pave.
Further, composite mode crack boundary mesh is divided, first quadrilateral mesh unit is paved along broad sense inner boundary, secondly quadrilateral mesh unit is paved along broad sense external boundary, again continue to pave quadrilateral mesh unit along mobile inside/outside border, finally complete paving of all quadrilateral mesh by free mesh.
Further, in step 2, quadrangular mesh partition is carried out for curved wall, combined parameters space law and pitching method, the grid problem of space curved surface is converted to plane grid problem, after stress and strain model, map back initial three-dimensional space by coordinate transform.
Further, in step 2, the geometry for shear wall structure splits, and adopts with the following method: for the shear wall without hole, there is not fractionation；For there being the shear wall at hole, geometry fractionation the most all can be carried out；For inclined roof wall or the trapezoidal wall at part band hole, then determine whether splitting condition according to openings position.
Compared with prior art, a kind of method for building structure geometric information model stress and strain model of the present invention is with pitching method as core, Joint Mapping grid and geometry Split Method, and take into account the versatility of free grid and the high efficiency of map grids, achieve the stress and strain model of building structure geometric information model, can be used for arbitrarily complicated building structure, there is the strongest versatility, structural separation is become the more uniform Coordination Model of ratio by the Meshing Method of the present invention simultaneously, it is adaptable to finite element analysis.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of a kind of method for building structure geometric information model stress and strain model of the present invention；
Fig. 2 is pitching method free grid schematic diagram in present pre-ferred embodiments；
Fig. 3 is the schematic diagram that in present pre-ferred embodiments, space surface mesh divides (as a example by round platform and cylinder)；
Fig. 4 is that in present pre-ferred embodiments, about end node processes schematic diagram；
Fig. 5 is constraint line segment processing schematic diagram in present pre-ferred embodiments；
Fig. 6 is that in present pre-ferred embodiments, a composite mode crack boundary mesh divides example；
Fig. 7 is shear wall split mode schematic diagram in present pre-ferred embodiments；
Fig. 8 is the flow chart of steps of the preferred embodiment of a kind of method for building structure geometric information model stress and strain model of the present invention.
Detailed description of the invention
Below by way of specific instantiation accompanying drawings embodiments of the present invention, those skilled in the art can be understood further advantage and effect of the present invention easily by content disclosed in the present specification.The present invention also can be implemented by other different instantiation or be applied, and the every details in this specification also can carry out various modification and change based on different viewpoints and application under the spirit without departing substantially from the present invention.
Fig. 1 is the flow chart of steps of a kind of method for building structure geometric information model stress and strain model of the present invention.As it is shown in figure 1, a kind of method for building structure geometric information model stress and strain model of the present invention, comprise the steps:
Step 101, arranges orchestration boundary point (coordination of beam column buttress plate) for building structure model.
Step 102, carries out respective members gridding according to the different component of building structure and divides, if framing component, then directly generates 2 node units；If floor or Base isolation system then use free mesh；If shear wall then distinguishes stalk and curved wall, for stalk, then directly judge to split and to use map grids or free mesh, for curved wall, the most first curved surface is mapped to parameter plane, then can basis split and select map grids or free grid, the most again parameter plane mesh mapping is returned luv space curved surface to obtain surface mesh.
Hereinafter the stress and strain model of different component in step 102 is described further:
1.1, use pitching method that arbitrary plane pel carries out pure tetragon free mesh.Its density specifically comprising the following steps that the grid according to be marked point and size are formed along the fixed boundary (interior fixed boundary or extenal fixation border) of arbitrary plane figure and initialize boundary node, wherein, the node paving outward border arranges counterclockwise, and the node inside paving border arranges in the direction of the clock；These nodes form a doubly linked list, select quadrilateral mesh from extenal fixation border inwards, inner boundary outwards starts to pave from level to level, after paving one layer, extenal fixation border is the most more newly formed mobile external boundary, interior fixed boundary is the most more newly formed mobile inner boundary, in this process, the situation that between moving boundary self and moving boundary with former fixed boundary it is possible that border is intersected or folded, now needs unit to be sewed up process accordingly with the independence and the closure that guarantee each edge circle；With the moving boundary (mobile external boundary, mobile inner boundary) that formed as external boundary, inner boundary repeat abovementioned steps until filling up whole region；When mobile external boundary node is with mobile inner boundary nodal pitch close appointment sizing grid, start unit closed pair node closed-loop carries out sealing treatment, specifically include knot removal, unit opens, unit closes, the deletion of cell translation, element sides, Compound Topology optimization etc.；Combine the weighting floating algorithm of Laplce and grid node is carried out floating by the constraint floating algorithm of Laplce, concrete thought is: Laplace method calculates the floating vector of node routinely, then judge whether this floating can ensure that mesh quality increases, if it is this is performed floating, otherwise floating amount is halved, if floating amount is too small after halving, abandon floating, otherwise repeat to appeal step.
Fig. 2 is pitching method free grid schematic diagram in present pre-ferred embodiments.nullFirst quadrilateral mesh unit is paved along extenal fixation border，In the most optional one, fixed boundary paves quadrilateral mesh unit，Paved the moving boundary formed by seen from Fig. 2 (a) twice and exist at A overlapping，Now relevant grid cell is sewed up accordingly process with the independence and the closure that guarantee each edge circle，Continue fixed boundary along another after process and carry out paving of quadrilateral mesh unit，Overlapping at A as seen from Fig. 2 (b) is eliminated，But occur again when paving new grid cell that the moving boundary at B1 and B2 overlaps，Relevant grid cell at B1 and B2 is carried out corresponding stitching process，And continue to pave quadrilateral mesh unit，As shown in Fig. 2 (c)，So persistently pave quadrilateral mesh unit，Occur moving boundary intersect or fold time relevant grid cell is carried out stitching process，Until the grid completing whole plane pel is paved.The process intersected about border, even-numbered nodes must be observed and retrain (node total number of Arbitrary Boundaries is even number) and grid optimization criteria, it is broadly divided into following 4 kinds of situations: (1) directly merges and intersects border, at B1 and B2 of A, Fig. 2 (b) of Fig. 2 (a)；(2) merging of staggering closes on the border of intersection location, at the C of Fig. 2 (c)；(3) insert a unit assisted border and intersect process, at the D2 of Fig. 2 (d)；(4) delete certain unit with guarantee intersect after borderline quality, at the D1 of Fig. 2 (d) and the E of 2 (e).
1.2, carry out quadrangular mesh partition for the developable space Surface Problems of building structure, combined parameters space law and pitching method, the grid problem of space curved surface is converted to plane grid problem, then maps back initial three-dimensional space by coordinate transform.Idiographic flow is as follows: first spread out as plane according to curved surface self-characteristic (such as cylinder, round table surface, hyperboloid, parabola etc.), planar carry out free mesh (see 1.1), then plane grid is mapped back luv space curved surface and obtains surface mesh (its mapping function is relevant with the concrete form of curved surface), as a example by round platform and Cylinder Surface, its stress and strain model is as it is shown on figure 3, the surface mesh that Fig. 3 (a) and Fig. 3 (b) is respectively round platform and cylinder divides schematic diagram.
null1.3、For restrained boundary problem in the territory of Base isolation system (fixed point alignment problem)，Its basic operation mainly includes two parts: (1) is when paving grid，Often generate a new unit and all can judge whether this region exists isolated about end node (fixed point)，If had, process this node，The most as shown in Figure 4，To building structure，The quadrilateral mesh divided typically will not comprise a lot of restraint joint，If only one of which restraint joint in quadrilateral units，Then delete the grid node close to this restraint joint，Reconstruct 4 quadrilateral units closed on as grid node using this restraint joint，If only two restraint joints in quadrilateral units，Then delete two grid nodes close to this restraint joint，Reconstruct 6 quadrilateral units closed on as grid node using these two restraint joints，When two restraint joints in quadrilateral units just have one to be grid node，Problem deteriorates to the situation of only one of which restraint joint in quadrilateral units，When there is 3 nearer restraint joints，Two restraint joints are selected to make quadrilateral units grid node，Its 3rd restraint joint can be only positioned in certain quadrilateral units，Problem deteriorates to the situation of only one of which restraint joint in quadrilateral units，When there is four nearer restraint joints，Directly using these 4 restraint joints as the grid node of quadrilateral units，When there is 5 nearer restraint joints，Directly using these 4 restraint joints as the grid node of quadrilateral units，Its 5th restraint joint is placed in inside this quadrilateral units，Problem deteriorates to the situation of only one of which restraint joint in quadrilateral units；null(2) initial restrained boundary is modeled to crack edge，Then generate broad sense Close edges for this crack edge and perform grid and pave，When retraining line segment and intersecting with border，With original boundaries as the end、Constraint line segment is the broad sense Close edges that waist generates that area is zero，It is that interior fixed boundary generates quadrilateral mesh unit by above-mentioned 1.1 with this broad sense Close edges，When retraining line segment with border independence，Generate, for diagonal, the broad sense Close edges that area is zero with constraint line segment，It is that interior fixed boundary generates quadrilateral mesh unit by above-mentioned 1.1 with this broad sense Close edges，And during for restrained boundary self intersection，Then it is modeled to composite mode crack border according to joining position，Then perform grid to pave，The most as shown in Figure 5，Fig. 5 (a)、(b)、C () respectively illustrates the constraint line segment being connected with border、Constraint line segment and compound constant line segment with border independence.It should be noted that at this: owing to retraining the self intersection of line segment and intersecting with original inner and outer boundary, the generalized boundary eventually formed either quantity or shape all may be entirely different with original boundaries, than composite mode crack border as shown in Figure 5 c, its broad sense external boundary is formed by retraining the line segment original inner and outer boundary of connection, broad sense inner boundary is formed by retraining line segment self intersection, total boundary number is become final two from original three, but boundary shape is complicated a lot.Fig. 6 show a composite mode crack boundary mesh and divides example, first quadrilateral mesh unit is paved along broad sense inner boundary, as shown in Figure 6 a, secondly quadrilateral mesh unit is paved along broad sense external boundary, as shown in Figure 6 b, again continue to pave quadrilateral mesh unit, as fig. 6 c along mobile inside/outside border, finally complete paving of all quadrilateral mesh by above-mentioned 1.1, as shown in fig 6d.
1.4, carry out geometry fractionation for shear wall structure, make the wall beam in structural meaning and wall column, it is simple to follow-up internal force statistics and structure design.As a rule geometry splits is relatively difficult, but shear wall structure has certain regularity, the shape of its monolithic wall is the most fixing, is exactly generally that a tetragon external boundary adds a tetragon hole, and this hole may be placed in the middle, it is likely to keep to the side, the most all can carry out geometry fractionation, concrete as it is shown in fig. 7, and for the inclined roof wall at part band hole or trapezoidal wall, then to determine whether splitting condition according to openings position, in particular cases may not split.Table 1 is for the shear wall split mode table of Fig. 7:
| Hole type | Split block | Hole type | Split block |
| Without hole | — | Hole, the lower left corner | ④⑤⑥ |
| Internal hole | ①②③④⑤⑥⑦⑧ | Hole, the upper left corner | ②③④ |
| Hole, the left side | ②③④⑤⑥ | Hole, the lower right corner | ⑥⑦⑧ |
| Hole, the right | ①②⑥⑦⑧ | Hole, the upper right corner | ①②⑧ |
| Hole, top | ①②③④⑧ | Left Ban Qiang hole | ④ |
| Hole below | ④⑤⑥⑦⑧ | Right Ban Qiang hole | ⑧ |
| Lateral direction penetrating | ②⑥ | Upper half wall hole | ② |
| Vertically communicated | ④⑧ | Lower half wall hole | ⑥ |
Visible, in the specific embodiment of the invention:
In time without hole, there is not fractionation in shear wall；
Internal hole shear wall is split as the most totally 8 plane pels；
Hole, left side shear wall is split as the most totally 5 plane pels；
Hole, the right shear wall is split as the most totally 5 plane pels；
Hole, top shear wall is split as the most totally 5 plane pels；
Hole shear wall is split as the most totally 5 plane pels below；
Lateral direction penetrating shear wall is split as the most totally 2 plane pels；
Vertically communicated shear wall is split as the most totally 2 plane pels；
Hole, lower left corner shear wall is split as the most totally 3 plane pels；
Hole, upper left corner shear wall is split as the most totally 3 plane pels；
Hole, lower right corner shear wall is split as the most totally 3 plane pels；
Hole, upper right corner shear wall is split as the most totally 3 plane pels；
Left Ban Qiang hole shear wall is split as the most totally 1 plane pel；
Right Ban Qiang hole shear wall is split as the most totally 1 plane pel；
Upper half wall hole shear wall is split as 2. 1 plane pel；
Lower half wall hole shear wall is split as 6. 1 plane pel.
Fig. 8 is the flow chart of steps of the preferred embodiment of a kind of method for building structure geometric information model stress and strain model of the present invention.As shown in Figure 8, a kind of preferred embodiment step for the method for building structure geometric information model stress and strain model of the present invention is as follows: the geological information of input building structure；Geological information according to building structure arranges orchestration boundary node；The different component of building structure is carried out component grid divide: framing component (beam column support) is directly divided into 2 node units；Floor or Base isolation system are used free mesh (being specifically shown in above-mentioned 1.1 and 1.3)；For shear wall, then judge it is stalk or curved wall；For stalk, the most directly judge whether to split border, for curved wall, then after curved wall expands into planar walls (being specifically shown in above-mentioned 1.2), then judge whether to split border；If border can be split, then carry out geometry fractionation (being specifically shown in above-mentioned 1.4), then judge whether to meet mapping condition, if border can not be split, then judge whether to meet mapping condition；If meeting mapping condition, then use map grids to divide, otherwise use free mesh (being specifically shown in above-mentioned 1.1);Determine whether Developing Surface；If then plane grid being mapped as space curved surface (being specifically shown in above-mentioned 1.2) and terminating, the most directly terminate.
In sum, a kind of method for building structure geometric information model stress and strain model of the present invention is with pitching method as core, Joint Mapping grid and geometry Split Method, and take into account the versatility of free grid and the high efficiency of map grids, achieve the stress and strain model of building structure geometric information model, can be used for arbitrarily complicated building structure, there is the strongest versatility, structural separation is become the more uniform Coordination Model of ratio by the Meshing Method of the present invention simultaneously, it is adaptable to finite element analysis.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Above-described embodiment all can be modified under the spirit and the scope of the present invention and change by any those skilled in the art.Therefore, the scope of the present invention, should be as listed by claims.
Claims (9)
1., for a method for building structure geometric information model stress and strain model, comprise the steps:
Step one, arranges orchestration boundary point for building structure model；
Step 2, carries out respective members stress and strain model according to the different component of this building structure, for framing component, then directly generates 2 node units；Free mesh is used for floor or Base isolation system；For shear wall, then distinguish stalk and curved wall, judgement direct for stalk its can split and use map grids or free mesh, for curved wall, the most first curved surface is mapped to parameter plane, then can basis split and select map grids or free mesh, the most again parameter plane mesh mapping is returned luv space curved surface to obtain surface mesh；For Base isolation system, also need to process for restrained boundary problem in the territory of Base isolation system, this process operation includes following two parts: (1), when paving grid, often generating a new unit and all can judge whether region exists isolated about end node, if had, processing this node；(2) initial restrained boundary is modeled to crack edge, then generate broad sense Close edges for this crack edge and perform grid and pave, and during for restrained boundary self intersection, then it is modeled to composite mode crack border according to joining position, then perform grid and pave.
A kind of method for building structure geometric information model stress and strain model, it is characterised in that: in step 2, free mesh carries out pure tetragon free mesh for using pitching method to arbitrary plane pel.
A kind of method for building structure geometric information model stress and strain model, it is characterised in that this free mesh comprises the steps:
Step 3.1, is formed along the fixed boundary of arbitrary plane figure according to the density of the grid of to be marked point and size and initializes boundary node；
Step 3.2, those nodes are formed a doubly linked list, select quadrilateral mesh from extenal fixation border inwards, inner boundary outwards starts to pave from level to level, after paving one layer, extenal fixation border is the most more newly formed mobile external boundary, and interior fixed boundary is the most more newly formed mobile inner boundary；
Step 3.3, with the moving boundary that formed as external boundary, inner boundary repeat abovementioned steps until fill up whole region；
Step 3.4, when mobile external boundary node is with mobile inner boundary nodal pitch close appointment sizing grid, start unit closed pair node closed-loop carries out sealing treatment；
Step 3.5, combines the weighting floating algorithm of Laplce and grid node is carried out floating by the constraint floating algorithm of Laplce.
A kind of method for building structure geometric information model stress and strain model, it is characterised in that: in step 3.1, the node paving outward border arranges counterclockwise, and the node inside paving border arranges in the direction of the clock.
A kind of method for building structure geometric information model stress and strain model, it is characterized in that: in step 3.4, sealing treatment includes that knot removal, unit open, unit closes, cell translation, element sides are deleted, Compound Topology optimization.
A kind of method for building structure geometric information model stress and strain model, it is characterized in that: in step 3.5, Laplace method calculates the floating vector of node routinely, then judge whether this floating can ensure that mesh quality increases, if it is this is performed floating, floating amount is halved by no person, if floating amount is too small after halving, abandons floating, otherwise repeat the above steps.
A kind of method for building structure geometric information model stress and strain model, it is characterized in that: composite mode crack boundary mesh is divided, first quadrilateral mesh unit is paved along broad sense inner boundary, secondly quadrilateral mesh unit is paved along broad sense external boundary, again continue to pave quadrilateral mesh unit along mobile inside/outside border, finally complete paving of all quadrilateral mesh by free mesh.
A kind of method for building structure geometric information model stress and strain model, it is characterized in that: in step 2, for curved wall, combined parameters space law and pitching method carry out quadrangular mesh partition, the grid problem of space curved surface is converted to plane grid problem, after stress and strain model, maps back initial three-dimensional space by coordinate transform.
A kind of method for building structure geometric information model stress and strain model, it is characterised in that in step 2, the geometry for shear wall structure splits, and adopts with the following method: for the shear wall without hole, there is not fractionation；For there being the shear wall at hole, geometry fractionation the most all can be carried out；For inclined roof wall or the trapezoidal wall at part band hole, then determine whether splitting condition according to openings position.
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