CN112990726A - Evaluation method for influence of historical block reconstruction design - Google Patents
Evaluation method for influence of historical block reconstruction design Download PDFInfo
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Abstract
The invention discloses an evaluation method of influence of historical block reconstruction design, which comprises the steps of constructing a historical block influence evaluation index system, carrying out quantitative analysis and evaluation on the existing historical block reconstruction design scheme, establishing quantitative association of an influence source and an evaluation result, and exploring the evaluation method of the influence of the historical block reconstruction design; the method provided by the invention is characterized in that the influence of the transformation historical block transformation design is evaluated by utilizing a quantitative analysis method, the feasibility of the historical block transformation design can be judged scientifically and systematically according to the influence quantitative evaluation, the subjective judgment ambiguity is reduced, the accuracy of objective judgment is improved, and the method can be widely applied to the field of historical block protection and updating design engineering. Compared with the prior art, the method has the advantages of quantitative analysis, good real-time performance, clear analysis elements and popularization and application prospect.
Description
Technical Field
The invention relates to the technical field of historical block assessment and protection, in particular to a method for assessing influence of historical block reconstruction design.
Background
At present, historical block protection and updating work is in development, and domestic attention to protection and updating of the spatial hierarchy of the historical blocks in advance influences assessment is less. The method comprises the following steps of evaluating the transformation design of the historical blocks in advance, namely evaluating the influence of artificial activities such as protection, regulation, updating and development on the historical blocks possibly caused by the transformation of the existing historical blocks in advance. At present, domestic expert consultation or review for protection planning in a historical block protection management system is also a mode for estimating influence in advance, and belongs to a Delphi assessment method in qualitative assessment. However, the assessment method has the characteristic of subjective judgment ambiguity, is lack of quantitative assessment method, is difficult to completely control the scientific and reasonable protection of the historical block, leads to a plurality of protection measures in a lagging or excessive state, and causes the adverse effect of the historical block or the inestimable measures.
Therefore, it is necessary to provide a quantitative prior assessment method for the influence of the reconstruction design of the historical blocks.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an evaluation method for the influence of historical block reconstruction design, which is characterized in that a historical block influence evaluation index system is constructed to quantitatively analyze and evaluate the existing historical block reconstruction design scheme; the quantitative association of the influence source and the evaluation result is established, the feasibility of the historical block reconstruction design can be judged scientifically and systematically according to the influence quantitative evaluation, the subjective judgment ambiguity is reduced, and the accuracy of objective judgment is improved.
In order to achieve the above object, the present invention provides the following technical solutions
A method for evaluating the influence of historical block renovation design comprises the following steps:
(1) determining an influence source: determining an influence subject;
(2) determining an influencing receptor;
(3) setting an influence level: comprehensively setting an influence level according to the specific type of the modification project and the block protection and update target;
(4) carrying out influence evaluation: establishing a matrix evaluation table to obtain a comprehensive influence level weight value W, and finally calculating to obtain a comprehensive influence loss benefit degree delta W;
(5) judging an influence result: and judging the comprehensive influence level of the reconstruction project on the historical block according to the value of the comprehensive influence profit margin.
And (2) analyzing and comprehensively judging the influence factors of the historical blocks, establishing an index system for influence evaluation, and determining the weight of the influence index system.
And the index system for establishing the influence evaluation determines the influenced influence factors as the basis of the influence evaluation index.
And the weight of the influence index system is determined to form a basis for determining the weight of the influence evaluation index by using data corresponding to the influence level of the historical block as a basis, and then the weight of the influence evaluation index is processed, so that the weight of the influence evaluation index is determined, and a pre-influence weight value W' is obtained through calculation.
And an analytic hierarchy process is adopted for establishing an index system, determining the weight and calculating the weight value.
And (4) evaluating by adopting one or more methods of sight analysis, hierarchical analysis, quantitative calculation or fuzzy comprehensive evaluation.
The calculation formula of the comprehensive influence loss degree in the step (4) is as follows:
△W＝W/W’*100％。
the influence receptor comprises 4 factor layers and 13 index layers, wherein the factor layers are overall space, buildings, historical street and environmental factors.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method for evaluating the influence of the historical block reconstruction design provided by the invention aims at protecting and updating the historical block, takes quantitative analysis and evaluation of the block reconstruction design as a basis, and takes advance evaluation as a means to construct a historical block influence evaluation index system. The quantitative association of an influence source and an evaluation result is established by analyzing and evaluating the historical block reconstruction design, the objective reconstruction actual state of the block is taken as a prerequisite, the relationship is established between the evaluation result and the reconstruction factors of the reconstruction design, the evaluation is taken as a guide, the core problem of protection and update is improved, the vacancy of the method for evaluating and quantitatively evaluating the historical block reconstruction design in advance is filled, and the method belongs to the first proposal of an applicant.
(2) The evaluation method provided by the invention is characterized in that the quantitative analysis method is used for evaluating the prior influence of the transformation history block design, the feasibility of the transformation history block design can be scientifically and systematically judged according to the influence quantitative evaluation, the subjective judgment ambiguity is reduced, and the accuracy of objective judgment is improved.
(3) The method is suitable for protecting and updating the historical block, good in real-time performance, clear in analysis elements and promising in popularization and application prospect.
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FIG. 1 is a general technical roadmap of a method for evaluating the impact of historical street furniture remodeling design in the present invention.
Detailed Description
The present invention will be described in more detail with reference to specific preferred embodiments, but the present invention is not limited to the following embodiments.
Example 1
As shown in fig. 1, before the influence evaluation of the modification design is started, basic research needs to be performed on the development and current research situation of the historical block, and then, the advanced historical block analysis and identification needs to be performed, that is, "influence identification and analysis" step, which specifically includes three processes of molecular modification project factor, identification of influence source, and analysis of influence process, and the present invention does not specifically limit the above technical contents.
In this embodiment, a method for evaluating an influence of a historical block reconstruction design includes the following steps:
(1) determining an influence source: determining an influence main body, and if the scale of the modified design project is large and the type is complex, decomposing an influence source into a plurality of factors by a factor analysis method; if the modification design project is far away from the influence receptor, whether the modification design project has potential influence on protection and updating of the historical block or not needs to be analyzed, and whether the modification design project needs to be included as an influence source or not is judged;
(2) determination of the influencing receptors: determining influence factors, establishing an index system, and finally determining weights, wherein the method specifically comprises three steps of analyzing and comprehensively judging the influence factors of the historical block, establishing the index system for influence evaluation, and determining the weights of the influence index system;
in this embodiment, on the basis of the influence source determined in step (1), the establishment of the index system is to use the determined influenced attribute as a basis for the influence evaluation index, and the influence receptor in this embodiment includes 4 factor layers such as "overall space", "building", "historical street", "environmental element" and 13 index layers; then, establishing an influence evaluation index system by using an analytic hierarchy process, wherein the influence evaluation index system is shown in table 1;
TABLE 1 historical blocks index Table of index system for establishing influence evaluation
In this embodiment, the historical neighborhood influence data is used as a basis for determining the weight of the influence evaluation index, and then the weight of the influence evaluation index is processed through hierarchical analysis, so that the weight of the influence evaluation index is determined, and a pre-influence weight value W' is obtained.
(3) Setting an influence level: comprehensively setting an influence level according to the specific type of the modification project and the block protection and update target;
wherein, generally, after determining the weight of each index, a scoring standard needs to be set; however, in the evaluation of the influence on the protection of a single historical block, the evaluation criterion needs to be replaced by the influence level, namely the influence level of the protection and update activities on the historical block; in order to facilitate visual comparison of relative importance of factor layers and index layers, the weighted value of each index can be converted into a score, namely the total score of the index layers (influence receptors) of the historical blocks is calculated by 100, and the actual score of each index is 100;
in this embodiment, "influence degree" is introduced as a quantitative determination standard of the influence level, "-50%" to + 50% "is used as an interval of the influence degree, and" no influence "(+ 5% to-5%) is used as a reference," beneficial influence "(+ 6% to + 50%)," damage influence "(-6% to-50%) is used as positive and negative two levels of influence, and" influence degree "absolute value 14% is used as one influence level, so that 7 influence levels are divided into" large beneficial influence "(+ 36% to + 50%) at level 1," general beneficial influence "(+ 21% to + 35%) at level 2," small beneficial influence "(+ 6% to + 20%) at level 3," no influence "(+ 5% to-5%) at level 4," small destructive influence "(" 6% to-20%) at level 5%), "small damage influence" ("in level 5%)," the positive and negative two levels of influence "(+ 5%)," influence levels are divided, The 'lossy influence of the level 6' is general (-21% to-35%), the 'lossy influence of the level 7' is larger (-36% to-50%); therefore, in the present embodiment, the "factor layer — index layer" in the historical street block influence assessment index system judges the influence level according to the 7 influence level criteria;
(4) carrying out influence evaluation: establishing a matrix evaluation table, and calculating to obtain a comprehensive influence level weight value;
in this embodiment, the influence evaluation is performed by a matrix evaluation method, a matrix table is used as a platform for the influence evaluation, the key points of the modification design project are decomposed into a plurality of influence factors (influence sources) and used as rows of a matrix, and the influence evaluation indexes are used as influence receptors and used as columns of the matrix, so that the influence cause-effect relationship between the influence sources and the influence receptors is established, and the specific method is as follows:
first, the letter A represents the influence source (influence factor), the letter B represents the influence receptor (index layer), the letter C represents the influence level, and the influence of the nth influence factor on the mth index is expressed as AnBmThe influence level is CkI.e. CkRepresenting one of the impact levels. Thus, Ck＝AnBm(k ═ 1,2,3,. times, n); the specific matrix evaluation table is shown in table 2;
TABLE 2 historical block 'development influence assessment' matrix assessment table
| B1 | B2 | B3 | B4 | ... | Bm | |
| A1 | A1B1 | A1B2 | A1B3 | A1B4 | ... | A1Bm |
| A2 | A2B1 | A2B2 | A2B3 | A2B4 | ... | A2Bm |
| A3 | A3B1 | A3B2 | A3B3 | A3B4 | ... | A3Bm |
| A4 | A4B1 | A4B2 | A4B3 | A4B4 | ... | A4Bm |
| ... | ... | ... | ... | ... | ... | ... |
| An | AnB1 | AnB2 | AnB3 | AnB4 | ... | AnBm |
Secondly, the influence degree (taking a middle value, for example, the middle value of + 10% -10% is 0) corresponding to each index influence level and the corresponding index weight value are weighted and calculated to obtain the influence weight value of each single index, namely the influence weight value of each single index
Then, the values of the individual cumulative weights are accumulated to obtain a comprehensive influence level weight value W, namely
Finally, from this, the combined impact gain (Δ W) ═ W/W' × 100% can be calculated.
(5) Judging an influence result: judging the comprehensive influence level of the reconstruction project on the historical block according to the comprehensive influence profit and loss;
and (4) judging the 'influence degree' of the reconstruction design on the protection and the updating of the historical block through the delta W value obtained by calculation in the step (4). If the comprehensive influence level of the reconstruction project on the historical block is judged to be weak damage according to the comprehensive influence level weighted value, namely the influence of the reconstruction design on the historical block is weak damage, the comprehensive influence result of the weak damage can be evaluated to be far away from the requirement of the historical block protection and updating, and an influence source with damage influence needs to be screened out and the scheme of the influence source needs to be adjusted to achieve the aim of the historical block protection and updating.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions within the technical scope of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method for evaluating the influence of historical block renovation design is characterized by comprising the following steps:
(1) determining an influence source: determining an influence subject;
(2) determining an influencing receptor;
(3) setting an influence level: comprehensively setting an influence level according to the specific type of the modification project and the block protection and update target;
(4) carrying out influence evaluation: establishing a matrix evaluation table to obtain a comprehensive influence level weight value W, and finally calculating to obtain a comprehensive influence benefit degree delta W;
(5) judging an influence result: and judging the comprehensive influence level of the reconstruction project on the historical block according to the value of the comprehensive influence profit margin.
2. The method for evaluating the influence of historical block reconstruction design according to claim 1, wherein the step (2) comprises three steps of analyzing and comprehensively judging the influence factors of the historical blocks, establishing an index system for influence evaluation, and determining the weight of the influence index system.
3. The method for evaluating the influence of historical block reform design according to claim 1, wherein the index system for establishing influence evaluation is used to determine influenced influence factors as a basis for influence evaluation indexes.
4. The method according to claim 3, wherein the determining of the weight of the influence index system is performed by using data corresponding to the influence level of the historical block as a basis for determining the weight of the influence evaluation index, and then processing the weight of the influence evaluation index to determine the weight of the influence evaluation index and calculate a pre-influence weight value W'.
5. The method of claim 4, wherein the index system is established, the weights are determined, and the weights are calculated by an analytic hierarchy process.
6. The method for evaluating influence of historical street remodeling design according to claim 5, wherein the evaluation in step (4) is performed by one or more of line-of-sight analysis, hierarchical analysis, quantitative calculation, or fuzzy comprehensive evaluation.
7. The method for evaluating influence of historical street remodeling design according to claim 6, wherein the formula for calculating the comprehensive influence profit margin in step (4) is as follows:
△W＝W/W’*100％。
8. the method of any one of claims 2-7, wherein the influence receptors comprise 4 factor layers and 13 index layers, wherein the factor layers are overall space, building, historical street and environmental factors.
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