Method for calculating length of long side of smoke-proof partition of aisle in building

Abstract

The invention relates to a method for calculating the length of a long side of a smoke-proof partition of an inner aisle of a building. The method comprises the following steps: 1) constructing a simplified graph of the inner aisle of the building by a graph theory; 2) arranging aisle system information in the building; 3) according to Technical Standard for Smoke Control and Exhaust System of Building GB51251-2017, determining the maximum allowable length of the long side of the smoke control subarea of the inner aisle; 4) calculating the length of the long side of the inner aisle by using an inner aisle long side length calculation general formula; 5) comparing the length of the long side of the inner aisle with the maximum allowable length of the long side of the smoke-proof partition of the inner aisle; and 6) determining the length of the long side of the smoke-proof partition of the inner aisle. Under the condition that aisle nodes, channels and closed loop information (node numbers, channel numbers, channel lengths and the like) in a building are known, the method for calculating the length of the long side of the aisle smoke-proof zone in the building can accurately and rapidly calculate the length of the long side of the aisle smoke-proof zone in the corresponding building, and convenience is provided for the smoke-proof and smoke-exhaust design work of the building.

Description

Technical Field

[0001] The present invention belongs to the technical field of smoke prevention and exhaust zone design in building smoke prevention and exhaust systems, and particularly relates to a calculation method for the long side length of a smoke prevention zone in an interior corridor of a building. Background Art

[0002] The building smoke exhaust system is related to the evacuation and escape of people after a fire, and is crucial for building fire safety. In the design of the smoke exhaust system, designers need to scientifically divide the smoke prevention zones according to the provisions of the Technical Standard for Building Smoke Prevention and Exhaust Systems GB51251-2017, and then reasonably arrange the smoke exhaust settings according to the smoke prevention zones. There is an important principle for setting the smoke prevention zones, that is, the maximum allowable long side length. The purpose of setting this principle is to scientifically control the area size of the smoke prevention zones. If the area of the smoke prevention zone is too large, when the smoke diffuses horizontally, it will entrain a large amount of cold air and settle, which is not conducive to the timely discharge of the smoke.

[0003] In a building, rooms are generally rectangular, and the measurement of the long side length is relatively simple. However, due to the changes in building functions and layouts, the interior corridors will present more complex situations, such as "L" shape, "I" shape, "return" shape, etc. For the calculation of the long side length of the above complex interior corridors, since the corridor is no longer a single "long and straight" evacuation passage, but there is one or more "forks", and the lengths in each direction are different, there has been no scientific and reasonable calculation method. Therefore, scientifically calculating the long side length of the interior corridor of a building is of great significance for the division of the smoke prevention zones in the interior corridor. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a calculation method for the long side length of a smoke prevention zone in an interior corridor of a building. By introducing graph theory knowledge, a reasonable calculation method for the long side length of the interior corridor of a building is established to improve the accuracy of calculating the long side length of the smoke prevention zone in the interior corridor of a building; and this method is applicable to interior corridors of buildings with different complex situations, such as "L" shape, "I" shape, "return" shape, etc., and can quickly complete the calculation of the long side length of the smoke prevention zone and the division of the smoke prevention zone in the interior corridor of a building. This method is easy to be realized by computer programming, and only requires information such as nodes, channels, and closed loops in the interior corridor of a building (node numbers, channel numbers, channel lengths, etc.), and can accurately and quickly obtain the long side length of the corresponding smoke prevention zone in the interior corridor of a building.

[0005] A calculation method for the long side length of a smoke prevention zone in an interior corridor of a building includes the following steps:

[0006] 1) Construct a simplified graph of the interior corridor of a building by graph theory. The simplified graph includes nodes, channels, and closed loops; the nodes are the endpoints or intersections of the interior corridor, and the number of them is N, and the node set is n = {n1, n2,..., n N}; The channel is the inner corridor between any two adjacent nodes, the number of which is B, and the channel set is b = {b1, b2, ..., b B}; The closed loop is any closed inner corridor, the number of which is C, and the closed loop set is c = {c1, c2, ..., c C};

[0007] 2) Organize the corridor system information in the building, including the corridor building information and the simplified corridor graph information constructed by graph theory; the corridor building information includes the corridor space net height H, corridor width W and the length L of each corridor channel bi (i=1,2,…,B); the simplified graph information of the inner corridor includes node numbers, node sets, channel sets and closed loop sets;

[0008] 3) According to Table 4.2.4 of the Technical Standard for Smoke and Exhaust Systems in Buildings GB51251-2017, combined with steps 1) and 2), determine the maximum allowable length L of the long side of the inner corridor smoke partition. max ;

[0009] 4) According to step 1) and step 2), the length L' of the long side of the inner aisle is calculated;

[0010] 5) Compare the length of the long side of the inner corridor L' and the maximum allowable length of the long side of the inner corridor smoke partition L max ; if L' <L max The inner corridor only needs to be divided into one smoke-proof partition, and the length of the long side of the smoke-proof partition is L f =L'; if L'>L max The inner aisle should be based on L' and L max Divided into multiple smoke-proof partitions, each smoke-proof partition has a long side length of L f The calculation requires rebuilding the simplified diagram of the inner corridor and repeating steps 4) and 5).

[0011] Preferably,

[0012] 1.1. In a corridor system within a building, the node numbering rules are unified, and the node numbers are set according to the principle of first from top to bottom, then from left to right, or first from left to right, then from top to bottom.

[0013] 1.2. The passages in the simplified diagram of the corridor inside the building can be represented by nodes, n j 、n k To simplify any two adjacent nodes in the graph, b i For the node n j 、n k The channel between them, then channel b i Expressed as (n j ,n k ) or (n k,n j )。

[0014] 1.3. The numbering rules for the closed loops in the simplified diagram of the inner corridor are unified. The closed loop numbers are set according to the principle of first from top to bottom and then from left to right, or first from left to right and then from top to bottom.

[0015] 1.4. The maximum allowable length L of the long side of the smoke prevention zone in the building inner corridor max shall follow the following principles:

[0016] 1) If the width W of the inner corridor < 2.5 m, then the maximum allowable length L of the long side of the smoke prevention zone max = 60 m;

[0017] 2) If the width W of the inner corridor > 2.5 m, then further judge the net height of the inner corridor space. If the net height H of the inner corridor space < 3 m, then the maximum allowable length L of the long side of the smoke prevention zone max = 24 m; If the net height 3 m < H < 6 m of the inner corridor space, then the maximum allowable length L of the long side of the smoke prevention zone max = 36 m; If the net height H of the inner corridor space > 6 m, then the maximum allowable length L of the long side of the smoke prevention zone max = 60 m.

[0018] 1.5. The calculation of the long side length L' of the building inner corridor shall follow the following principles:

[0019] 1) The long side length L' of the inner corridor is the maximum along - distance D between any two points in the inner corridor max ;

[0020] 2) Let the function F represent selecting the largest element from the set;

[0021] 3) The calculation of the long side length L' of the inner corridor is divided into the inner corridor with a closed loop and the inner corridor without a closed loop;

[0022] 4) If it is an inner corridor with a closed loop, the set of the inner corridor lengths in the loop is E, specifically in formula (1)

[0023]

[0024] 5) Calculate the maximum closed - loop length P max , specifically in formula (2)

[0025] P max = F(E) (2)

[0026] 6) The maximum along - distance D between any two points in the inner corridor with a closed loop max , specifically in formula (3)

[0027]

[0028] 7) If it is an inner aisle within a non - closed loop, the along - the - way distance D between any two points in the non - loop inner aisle can be accurately represented by nodes, and its set function is specifically Equation (4).

[0029]

[0030] 8) The maximum along - the - way distance D between any two points in the inner aisle max , which is specifically Equation (5).

[0031] D max = F(D) (5)

[0032] 9) In summary, the length L' of the long side of the inner aisle is specifically Equation (6).

[0033]

[0034] 1.6. The length of the passage in the building inner aisle follows the following principle, that is

[0035] 1.7. If the inner aisle in the building is an inner aisle within a closed loop, the set of the lengths of the inner aisle within the loop is E, and each closed - loop element in the set E can be accurately represented by nodes.

[0036] 1.8. If there is a closed loop in the simplified diagram of the building inner aisle, the length L of the long side of the inner aisle between node n i and node n k can be expressed as bj , and and (j, l, m, and k are successively connected nodes), taking as the criterion.

[0037] 1.9. The smoke - prevention zone of the building inner aisle meets the condition that the horizontal distance between any point and the nearest natural smoke exhaust opening or mechanical smoke exhaust opening is not greater than 30 m.

[0038] The beneficial effects of the present invention are as follows:

[0039] 1) A calculation method for the length of the long side of the smoke - prevention zone of the building inner aisle is established, realizing the rapid solution of the length of the long side of the smoke - prevention zone of the building inner aisle under any working conditions.

[0040] 2) Using graph - theory knowledge, the complex inner aisle of the building is transformed into a simple graph composed of nodes, channels, etc., and the length of the long side of the building inner aisle is more clearly and accurately expressed through nodes, improving the accuracy of the calculation of the length of the long side of the smoke - prevention zone of the building inner aisle.

[0041] 3) This method is easy to write a program for calculating the length of the long side of the smoke - prevention zone of the building inner aisle using programming languages, greatly reducing the workload of calculating the length of the long side of the smoke - prevention zone of the complex inner aisle of the building. Brief Description of the Drawings

[0042] Figure 1 It is a logic block diagram of a calculation method for the long side length of a smoke prevention zone in an interior corridor of a building;

[0043] Figure 2 It is a flowchart of a calculation method for the long side length of a smoke prevention zone in an interior corridor of a building;

[0044] Figure 3 It is a floor plan of a "work" - shaped interior corridor in an embodiment;

[0045] Figure 4 It is a floor plan of a "return" - shaped interior corridor in an embodiment;

[0046] Figure 5 For Figure 3 the simplified diagram of the "work" - shaped interior corridor shown;

[0047] Figure 6 For Figure 4 the simplified diagram of the "return" - shaped interior corridor shown;

[0048] Figure 7 For Figure 4 the reconstructed simplified diagram of the "return" - shaped interior corridor shown;

[0049] Figure 8 For Figure 3 the smoke prevention zone division and information summary diagram of the "work" - shaped interior corridor shown;

[0050] Figure 9 For Figure 4 the smoke prevention zone division and information summary diagram of the "return" - shaped interior corridor shown. Detailed Embodiment

[0051] The following further describes the specific implementation manners of the present invention in combination with embodiments and drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope of the present invention and its applications.

[0052] A calculation method for the long side length of a smoke prevention zone in an interior corridor of a building, and the flowchart is as Figure 2 shown:

[0053] Step 1: Input parameters (information related to the interior corridor system of the building)

[0054] Construct a simplified diagram of the interior corridor of the building by graph theory. The simplified diagram includes nodes, channels, and closed loops; the nodes are the endpoints or intersections of the interior corridor, and the number of nodes is N, and the node set is n = {n1, n2, …, n N}; the channels are the interior corridors between any two adjacent nodes, and the number of channels is B, and the channel set is b = {b1, b2, …, b B}; The enclosed loop is any closed inner aisle, and its quantity is C. The set of enclosed loops is c = {c1, c2, …, c C}; and organize the information of the inner aisle system in the building, including the information of the inner aisle building and the information of the simplified graph of the inner aisle constructed by graph theory; the information of the inner aisle building includes the net height H of the inner aisle space, the width W of the inner aisle, and the length L of each passage in the inner aisle bi (i = 1, 2, …, B); the information of the simplified graph of the inner aisle includes node numbers, node sets, passage sets, and enclosed loop sets;

[0055] The node numbering rules are unified. The node numbers are set according to the principle of first from top to bottom and then from left to right or first from left to right and then from top to bottom; the enclosed loop numbering rules are unified. The enclosed loop numbers are set according to the principle of first from top to bottom and then from left to right or first from left to right and then from top to bottom; the passage can be represented by nodes, n j 、n k are any two adjacent nodes in the simplified graph, and b i is the passage between the nodes n j 、n k , then the passage bi is represented as (n j , n k ) or (n k , n j );

[0056] Step 2: Judge the width of the inner aisle

[0057] 1) If the width W of the inner aisle < 2.5 m, then the maximum allowable length L of the long side of the smoke prevention zone max = 60 m;

[0058] 2) If the width W of the inner aisle > 2.5 m, then further judge the net height of the inner aisle space; if the net height H of the inner aisle space < 3 m, then the maximum allowable length L of the long side of the smoke prevention zone max = 24 m; if the net height 3 m < H < 6 m of the inner aisle space, then the maximum allowable length L of the long side of the smoke prevention zone max = 36 m; if the net height H of the inner aisle space > 6 m, then the maximum allowable length L of the long side of the smoke prevention zone max = 60 m.

[0059] Step 3: Calculate the length of the long side of the inner aisle

[0060] The calculation of the length L' of the long side of the inner aisle follows the following principles:

[0061] 1) The length L' of the long side of the inner aisle is the maximum along - distance D between any two points in the inner aisle max ;

[0062] 2) Let the function F represent selecting the largest element from the set;

[0063] 3) The calculation of the long side length L' of the inner aisle is divided into the inner aisle of the closed loop and the inner aisle of the non-closed loop;

[0064] 4) If it is the inner aisle of the closed loop, the set of the inner aisle lengths of the loop is E, specifically as shown in Equation (1)

[0065]

[0066] 5) Calculate the maximum length P of the closed loop max , specifically as shown in Equation (2)

[0067] P max = F(E) (2)

[0068] 6) The maximum along-distance D between any two points in the inner aisle of the closed loop max , specifically as shown in Equation (3)

[0069]

[0070] 7) If it is the inner aisle of the non-closed loop, the along-distance D between any two points in the non-loop inner aisle can be accurately represented by nodes, and its set function is specifically as shown in Equation (4)

[0071]

[0072] 8) The maximum along-distance D between any two points in the inner aisle max , specifically as shown in Equation (5)

[0073] D max = F(D) (5)

[0074] 9) In summary, the long side length L' of the inner aisle, specifically as shown in Equation (6)

[0075]

[0076] Step 4: Compare the long side length of the inner aisle and the maximum allowable long side length of the smoke prevention zone of the inner aisle

[0077] 1) If L' < L max , the inner aisle only needs to be divided into one smoke prevention zone, and the long side length L of its smoke prevention zone f = L';

[0078] 2) If L' > L max , the inner aisle needs to be divided into multiple smoke prevention zones according to L' and L max , and the long side length L of each smoke prevention zone f It is necessary to reconstruct the simplified diagram of the inner aisle and repeat Step 3 and Step 4;

[0079] Step 5: Determine the long side length of the smoke prevention zone in the inner corridor. The smoke prevention zone meets the condition that the horizontal distance between any point and the nearest natural smoke exhaust opening or mechanical smoke exhaust opening is not greater than 30 m.

[0080] Embodiment:

[0081] In a certain multi-story building, there are respectively an "I"-shaped inner corridor and a "return"-shaped inner corridor. The clear heights of the "I"-shaped inner corridor and the "return"-shaped inner corridor are 2.90 m and 3.05 m respectively, the widths are 2.4 m and 2.7 m respectively, and the areas are 141 m 2 and 242 m 2 ; Figure 3 、 Figure 4 are respectively the floor plans of the "I"-shaped inner corridor and the "return"-shaped inner corridor.

[0082] For the above multi-story building, the steps of a calculation method for the long side length of the smoke prevention zone in the building inner corridor in this embodiment are briefly described as follows:

[0083] Step 1: Input the relevant information of the "I"-shaped inner corridor and the "return"-shaped inner corridor in a certain multi-story building, including the building information of the inner corridor and the information of the simplified diagram of the building inner corridor abstracted by using graph theory knowledge. Figure 5 、 Figure 6 are respectively the simplified diagrams of the "I"-shaped inner corridor and the "return"-shaped inner corridor of the above multi-story building;

[0084] Step 2: According to Table 4.2.4 of the Technical Standard for Building Smoke Prevention and Exhaust Systems GB51251-2017, and combining the relevant information sorted out in Step 1, respectively determine the maximum allowable long side length L of the smoke prevention zone of the "I"-shaped inner corridor and the "return"-shaped inner corridor max :

[0085] 1) "I"-shaped inner corridor: The net width W of this inner corridor is 2.4 m. When the net width of the inner corridor is less than 2.5 m, the maximum allowable long side length L of its smoke prevention zone max = 60 m;

[0086] 2) "Return"-shaped inner corridor: The net width W of this inner corridor is 2.7 m. Since the net width of the above inner corridor is greater than 2.5 m, it is necessary to further judge the maximum allowable long side length of its smoke prevention zone in combination with the clear height of the inner corridor; and it is also known that its clear height H = 3.05 m. Therefore, the maximum allowable long side length L of its smoke prevention zone max = 36 m;

[0087] Step 3: According to the simplified diagrams of the "I"-shaped inner corridor and the "return"-shaped inner corridor constructed in Step 1, and the general formula for calculating the long side length of the inner corridor, respectively calculate the long side lengths of the "I"-shaped inner corridor and the "return"-shaped inner corridor:

[0088] 1) “I”-shaped inner walkway: The distance D between any two points in the “I”-shaped inner walkway is a set function represented by nodes, specifically, formula (7):

[0089]

[0090] The specific values of each element in set D are as follows:

[0091]

[0092]

[0093] The maximum distance D between any two points in the above-mentioned “I”-shaped walkway max , solved by function F, specifically formula (23) represents selecting the largest element from a set

[0094]

[0095] The length of the long side of the “I” shaped inner aisle L’ is specifically expressed by formula (24):

[0096] L'=D max =37.4m (24)

[0097] In summary, the length of the long side of the "I"-shaped corridor L' is less than the maximum allowable length of the long side of its smoke-proof partition L max Therefore, the length of the long side of the smoke partition in the "I" shaped corridor is L f =L'=37.4m.

[0098] 2) “U”-shaped inner aisle: The length of the “U”-shaped inner aisle is E, which is specifically expressed as formula (25):

[0099]

[0100] The length of loop c1 in the above set E is specifically expressed as formula (25)

[0101]

[0102] The maximum loop length P of the above U-shaped inner corridor max , solved by function F, specifically formula (26)

[0103] P max =F(E)=89.8m (26)

[0104] The maximum distance D between any two points in the above U-shaped walkway max , which is specifically formula (27)

[0105]

[0106] Because the D of the above-mentioned "hui"-shaped inner aisle max is greater than L max , it is necessary to reconstruct the simplified diagram of the inner aisle, and split the "hui"-shaped inner aisle into three "L"-shaped inner aisles, namely L1, L2, and L3. Figure 7 Reconstruct the simplified diagram for the "hui"-shaped inner aisle of the above multi-story building;

[0107] The along-distance D between any two points of the "L1" inner aisle, which is a set function represented by nodes, specifically as Equation (28)

[0108]

[0109] The specific numerical values of each element in the set D, specifically as Equations (29) to (31)

[0110]

[0111] The maximum along-distance D between any two points of the above "L1" inner aisle max , is solved by the function F, specifically as Equation (32) which represents selecting the largest element from the set

[0112] D max = F(D) = 34m (32)

[0113] The length L' of the long side of the above "L1" inner aisle, which is specifically as Equation (33)

[0114] L' = D max = 34m (33)

[0115] In summary, the length L' of the long side of the "L1" inner aisle is not greater than the maximum allowable length L of the long side of its smoke prevention zone max . Therefore, the length L of the long side of the smoke prevention zone of the "L1" inner aisle f = L' = 34m.

[0116] The along-distance D between any two points of the "L2" inner aisle, which is a set function represented by nodes, specifically as Equation (34)

[0117]

[0118] The specific numerical values of each element in the set D, specifically as Equations (35) to (37)

[0119]

[0120] The maximum along-distance D between any two points of the above "L2" inner aisle max , is solved by the function F, specifically as Equation (38) which represents selecting the largest element from the set

[0121] D max = F(D) = 32m (38)

[0122] The length L' of the long side of the "L2" - shaped inner aisle mentioned above is specifically given by Equation (39)

[0123] L' = D max = 32m (39)

[0124] In summary, the length L' of the long side of the "L2" - shaped inner aisle is not greater than the maximum allowable length L of the long side of its smoke - prevention zone max . Therefore, the length L of the long side of the smoke - prevention zone of the "L2" - shaped inner aisle f = L' = 32m

[0125] The along - the - way distance D between any two points in the "L3" - shaped inner aisle is a set function represented by nodes, specifically given by Equation (40)

[0126]

[0127] The specific numerical values of each element in the set D are specifically given by Equations (41) - (43)

[0128]

[0129] The maximum along - the - way distance D between any two points in the above - mentioned "L3" inner aisle max , is solved by the function F, specifically represented by Equation (44) which means selecting the largest element from the set

[0130] D max = F(D) = 24m (44)

[0131] The length L' of the long side of the "L3" - shaped inner aisle mentioned above is specifically given by Equation (45)

[0132] L' = D max = 24m (45)

[0133] In summary, the length L' of the long side of the "L3" - shaped inner aisle is not greater than the maximum allowable length L of the long side of its smoke - prevention zone max . Therefore, the length L of the long side of the smoke - prevention zone of the "L3" - shaped inner aisle f = L' = 24m

[0134] The smoke - prevention zone division and information summary diagrams of the "I" - shaped inner aisle and the "Hui" - shaped inner aisle in the multi - storey building in the above - mentioned embodiments are as shown in Figure 8 , Figure 9 .

[0135] As can be seen from the steps and results of the method for calculating the long side length of the smoke prevention zone in the building inner aisle according to the present invention, the present invention calculates the long side length of the inner aisle quickly by establishing a general formula for the long side length relationship of the inner aisle. Given the lengths of the passages between the nodes of the inner aisle, the present invention can accurately and quickly obtain the corresponding long side length of the inner aisle. The present invention can be implemented by computer language programming. Users can input the building information of the inner aisle system, such as nodes, passage lengths, etc., for any building inner aisle system, and then quickly obtain the long side length of the smoke prevention zone in the inner aisle, which is the purpose that the present invention hopes to achieve.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A calculation method for the long side length of a smoke prevention zone in an interior corridor of a building, characterized in that It includes the following steps: 1) Construct a simplified graph of the interior corridors in a building using graph theory. The simplified graph includes nodes, corridors, and closed loops. The nodes are the endpoints or intersections of the interior corridors, and the number of nodes is N. The node set is n = {n1, n2, …, n N}; The corridors are the interior corridors between any two adjacent nodes, and the number of corridors is B. The corridor set is b = {b1, b2, …, b B}; The closed loops are any closed interior corridors, and the number of closed loops is C. The closed loop set is c = {c1, c2, …, c C}; 2) Organize the information of the inner corridor system in the building, including the inner corridor building information and the simplified inner corridor graph information constructed by graph theory; the inner corridor building information includes the net height H of the inner corridor space, the width W of the inner corridor, and the length L of each channel in the inner corridor bi (i = 1, 2, …, B); the simplified inner corridor graph information includes node numbers, node sets, channel sets, and closed loop sets; 3) According to Table 4.2.4 of the Technical Standard for Building Smoke Prevention and Exhaust Systems GB51251-2017, in combination with the said step 1) and the said step 2), determine the maximum allowable length L of the long side of the smoke compartment in the inner corridor max ; 4) Calculate the length L' of the long side of the inner aisle according to step 1) and step 2) above; 5) Compare the length L’ of the long side of the inner aisle with the maximum allowable length L of the long side of the smoke prevention zone in the inner aisle max ; If L’ < L max , the inner aisle only needs to be divided into one smoke prevention zone, and the length L of the long side of its smoke prevention zone f = L’; If L’ > L max , the inner aisle needs to be divided into multiple smoke prevention zones according to L’ and L max , and the length L of the long side of each smoke prevention zone f Calculate that it is necessary to reconstruct the simplified diagram of the inner aisle and repeat steps 4) and 5).

2. The calculation method for the long side length of a smoke prevention zone in an interior corridor of a building according to claim 1, wherein The node numbering rules are unified, and the node numbers are set according to the principle of first from top to bottom and then from left to right or first from left to right and then from top to bottom.

3. The calculation method for the long side length of a smoke prevention zone in an interior corridor of a building according to claim 1, characterized in that The passage in the simplified diagram of the inner aisle can be represented by nodes, n j , n k are any two adjacent nodes in the simplified diagram, and bi is the passage between the nodes n j , n k . Then the passage bi is represented as (n j , n k ) or (n k , n j ).

4. The calculation method for the long side length of a smoke prevention zone in an interior corridor of a building according to claim 1, wherein The numbering rules for the closed loops in the simplified diagram of the inner aisle are unified, and the closed loop numbers are set according to the principle of first from top to bottom and then from left to right or first from left to right and then from top to bottom.

5. The calculation method for the long side length of a smoke prevention zone in a building corridor according to claim 1, characterized in that, The maximum allowable length L of the long side of the smoke compartment in the inner corridor max Follows the following principles: 1) If the width W of the inner corridor < 2.5m, then the maximum allowable length L of the long side of the smoke prevention zone max = 60m; 2) If the width W of the inner corridor > 2.5m, then further judge the net height of the inner corridor space; if the net height H of the inner corridor space < 3m, then the maximum allowable length L of the long side of the smoke prevention zone max = 24m; if the net height of the inner corridor space 3m < H < 6m, then the maximum allowable length L of the long side of the smoke prevention zone max = 36m; if the net height H of the inner corridor space > 6m, then the maximum allowable length L of the long side of the smoke prevention zone max = 60m.

6. The calculation method for the long side length of a smoke prevention zone in an interior corridor of a building according to claim 1, characterized in that, The calculation of the length L' of the long side of the inner aisle follows the following principles: 1) The length L' of the inner aisle long side is the maximum along - distance D between any two points in the inner aisle max ; 2) Let the function F represent selecting the largest element from the set; 3) The calculation of the length L' of the long side of the inner aisle is divided into the inner aisle of the closed loop and the inner aisle of the non-closed loop; 4) If it is the inner aisle of the closed loop, the set of the lengths of the inner aisles of the loop is E, specifically in formula (1) 5) Calculate the maximum enclosed loop length P max , specifically as shown in Equation (2) P max = F(E) (2) 6) The maximum along - the - path distance D between any two points in the enclosed - loop inner walkway max , which is specifically Equation (3) 7) If it is the inner aisle of the non-closed loop, the along-distance D between any two points of the non-loop inner aisle can be accurately represented by the nodes, and its set function is specifically in formula (4) 8) The maximum along - the - path distance D between any two points in the inner aisle max , which is specifically given by Equation (5) D max = F(D) (5) 9) In summary, the length L' of the long side of the inner aisle, specifically in formula (6) 7. According to the calculation principle of the long side length L' of the inner aisle described in claim 6, it is characterized in that, The long side length of the walkway between two nodes satisfies 8. According to the calculation principle of the long side length L' of the inner aisle described in claim 6, it is characterized in that, If it is the inner aisle of the closed loop, the set of the lengths of the inner aisles of the loop is E, and each closed loop element in the set E can be accurately represented by the nodes.

9. According to the calculation principle of the long side length L' of the inner aisle described in claim 6, it is characterized in that, If there is a closed loop in the simplified diagram of the internal corridor in the building, the length L of the long side of the internal corridor between node n j and node n k can be expressed as bi , and and (j, l, m, and k are successively connected nodes), taking as the standard.

10. The calculation method for the long side length of a smoke prevention zone in an interior corridor of a building according to claim 1, wherein, Determine the long side length L of the smoke prevention zone f , and the smoke prevention zone meets the condition that the horizontal distance between any point and the nearest natural smoke exhaust opening or mechanical smoke exhaust opening is not greater than 30 m.

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