CN113868741A - Pressure relief design determination method for warehouse for storing 3 and 4 items of class A - Google Patents

Pressure relief design determination method for warehouse for storing 3 and 4 items of class A Download PDF

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CN113868741A
CN113868741A CN202111126561.2A CN202111126561A CN113868741A CN 113868741 A CN113868741 A CN 113868741A CN 202111126561 A CN202111126561 A CN 202111126561A CN 113868741 A CN113868741 A CN 113868741A
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高阳
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China Shipbuilding NDRI Engineering Co Ltd
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Abstract

The invention discloses a method for judging the pressure relief design of a warehouse for storing 3 and 4 items of A-type goods, which is characterized in that the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of A-type goods are obtained by adopting a data reasoning and nonlinear equation set calculation method according to the constraint condition of a building design specification, and whether the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of A-type goods meet the pressure relief design requirement is judged. Compared with the prior art, the method has the advantages of quickly and accurately judging whether the warehouse of 3 and 4 items of articles to be built meets the pressure release design requirement, having few judging steps, omitting various basis conditions, being simple and convenient, greatly accelerating the project progress and obtaining good working efficiency and economic benefit.

Description

Pressure relief design determination method for warehouse for storing 3 and 4 items of class A
Technical Field
The invention relates to the technical field of industrial building fireproof design, in particular to a pressure relief design judgment method for a warehouse for storing 3 and 4 items of class A.
Background
At present, in the warehouse pressure relief design judgment process of 3 and 4 items of storage A, whether the pressure relief design requirement is met or not is judged to be generally divided into three steps according to the known building length (L), width (W) and height (H): step one, determining a specific number of a pressure relief ratio C value according to a stored article; secondly, defining the position and size of an evacuation door and the position and size of a fire rescue window, providing the size of the cross section of each of a column, a beam and a block low wall, and providing the size of the width of a roof drainage ditch; and thirdly, judging whether the requirement of an aspect ratio formula (L x [ (W + H) × 2]/(4 x W x H) ≦ 3) is met, whether the requirement of a standard pressure relief area formula (10 x C (L x W x H) 2/3 is not more than the design pressure relief area) is met, and the like, and then judging whether the design requirement of pressure relief is met. According to the method, the size of the width of the roof drainage ditch is given according to the known length (L), width (W) and height (H) of the building, the fire hazard category of stored article production, the respective section sizes of the columns, beams and low walls, the position and size of an evacuation door and the position and size of a fire rescue window, and then whether the pressure release design requirement is met or not is judged through design specifications and calculation.
In the prior art, pressure relief design judgment is difficult to apply under the condition that the length (L), the width (W) and the height (H) of a warehouse for storing 3 and 4 items of articles such as a class A are only known, so that the judgment process is complex, time and labor are wasted, the working efficiency is low, and the judgment result is inaccurate or the judgment cannot be carried out due to the lack of judgment conditions.
Disclosure of Invention
The invention aims to provide a method for judging the pressure relief design of a warehouse for storing 3 and 4 items of A-type goods, which is designed aiming at the defects of the prior art, and is characterized in that the respective value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of A-type goods are obtained by adopting a data reasoning and nonlinear equation system calculation method according to the constraint conditions of building design specifications, and the value ranges obtained by data reasoning and calculation are used for judging whether the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of A-type goods to be built are in the value ranges, so as to judge whether the pressure relief design requirements are met, so that the judgment steps are greatly reduced, various basis conditions are omitted, the judgment result is quick and accurate, and the working efficiency is further improved.
The purpose of the invention is realized as follows: a method for judging pressure release design of a warehouse for storing 3 and 4 items of A-type goods is characterized in that according to the constraint condition of building design specifications, a method for carrying out data reasoning and nonlinear equation system calculation is adopted to obtain the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of A-type goods, whether the length (L), the width (W) and the height (H) of the warehouse to be built are in the value ranges is judged, whether the pressure release design requirements are met is further judged, and the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of A-type goods are calculated, and specifically comprises the following steps:
(one) determining a monomer area indicator
According to the 'building design fire protection code' (GB 50016-2014 (2018 edition) table 3.3.2), only single-layer small warehouses are allowed to be built for the items A and B, the maximum floor area of each small warehouse is 180 square meters, the maximum allowable area of each fire protection subarea of the warehouse is not more than 60 square meters, and accordingly, the building area for storing the items A and B, 3 and 4 warehouses is determined to be not more than 180 square meters, and the area of each fire protection subarea is not more than 60 square meters.
(II) determining the value of each part component
According to unified design standards for civil buildings (GB 50352-2019 item 6.8.6), the minimum evacuation clear height is determined to be 2.0 m, and the height of the door frame at the top is added, so that the height of the door is 2.1 m.
According to the 'building design fire protection code' (GB 50016-2014 (2018 edition) 7.2.4 strips and 7.2.5 strips), the clear width of a fire-fighting rescue window is not less than 1.0 m, the width of a door frame (a steel door commonly used for a warehouse evacuation door) is increased, the width of the door is 1.2 m (the upper part of the door is provided with breakable safety glass which can be used as a fire-fighting rescue window), and in addition, the height difference in a transport room is 0.15 m conveniently.
The roof is a light roof, and the slope is unchanged according to the conventional 5 percent value.
According to the size of the current building, the beam, the pillar, the block wall and the fireproof and explosion-proof wall, the cross section is taken according to the worst condition, the cross section of the pillar is taken as 0.6 meter (long) x 0.6 meter (wide), the cross section of the beam is taken as 0.4 meter (wide) x0.9 meter (high), the block short wall is taken as 1.2 meter (high) x 0.24 meter (wide), and the fireproof and explosion-proof wall is taken as 0.24 meter (wide).
In summary, based on the inverse ratio of the pressure relief area to the non-pressure relief area, the lower limit value is set for each component of the pressure relief area, and the upper limit value is set for each component of the non-pressure relief area, so as to ensure that the pressure relief area requirement specified by the specification can be met under the condition of the minimum pressure relief area.
Thirdly, preliminarily determining the respective value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the 3 and 4 items of the A class according to the building design specification and data reasoning
In the step (one), the warehouse regulations for clearly storing 3 and 4 items of class A require that the area of the warehouse building is not more than 180 square meters, the area of each fireproof subarea is not more than 60 square meters, the warehouse building is divided into 3 fireproof subareas in total, and the wide edge (W) of each fireproof subarea is formedPartitioning) The long side (X) is the same.
According to the building design fire protection code (GB 50016-2014 (2018 edition) 6.3.1), the horizontal distance of the nearest edge between the door, the window and the hole on two sides of the fire protection wall is not less than 2.0 meters.
According to the 'building design fire protection code' (GB 50016-2014 (2018 edition) 7.2.5), the net height and the net width of a window for fire rescue personnel to enter should not be less than 1.0 m, the distance should not be more than 20 m, and each fire protection zone should not be less than 2, so that the minimum value of the long edge X of each fire protection zone, namely X is obtainedMINNot less than 9.6 m.
In the step (one), the building area of the warehouse for definitely storing the items A and B3 and 4 in the index of the monomer area is determined to be not more than 180 square meters, so that L W is not more than 180 square meters. When L takes the minimum value, i.e. LMINWhen =9.6 m, W is the maximum value, and hence L is known to beMIN*WMAXLess than or equal to 180 square meters, WMAXLess than or equal to 18.75 meters. The width (W) is composed of the width of pillars at two sides and the distance between the pillars, the width of the pillars is 0.6 m (considered from the most adverse factors), the distance between the pillars is the minimum value meeting the evacuation requirement of fire protection design, namely 1.4 m (refer to 'architectural design fire protection Specification' GB50016-2014 (2018 edition) No. 3.7.5), and the W is determinedMINNot less than 0.6 m +1.4 m +0.6 m =2.6 m, and WMAXNot more than 18.75 meters, and primarily determining that W is not less than 2.6 meters and not more than 18.75 meters.
According to known LMINNot less than 9.6 m, and because L W is not more than 180 square meters, when W is the minimum value, W isMINIf =2.6 m, L is the maximum value, and L can be obtained therefromMAX*WMIN≤180，LMAXLess than or equal to 69.23 meters, so that the L less than or equal to 69.23 meters is preliminarily determined to be less than or equal to 9.6 meters.
And (5) in the step (II), the values of the components of each part are determined, and the beam height is definitely 0.9 m and the gate height is definitely 2.1 m under the consideration of the most adverse factors. From this, the minimum height (H) of the building is knownMIN) Not less than 3 m, due to the maximum height (H)MAX) No relevant design specification limit, and no maximum height (H)MAX) The reasoning and calculation basis of (1), therefore, the H is preliminarily determined to be more than or equal to 3 meters.
Fourthly, the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the 3 and 4 items of the class A are verified and determined according to the calculation of the building design specification and the nonlinear equation set
And (c) preliminarily determining the length (L), the width (W) and the height (H) of the warehouse for storing the 3 or 4 items of the A class according to the building design specification and data reasoning, wherein the length (L), the width (W) and the height (H) are respectively as follows: l is more than or equal to 9.6 meters and less than or equal to 69.23 meters, W is more than or equal to 2.6 meters and less than or equal to 18.75 meters, and H is more than or equal to 3 meters.
According to the fireproof standard of building design (GB 50016-2014 (2018 edition) No. 3.6.4), the length (L), width (W) and height (H) of the building have the length-diameter ratio of no more than 3, namely L [ (W + H) × 2](4W H) is less than or equal to 3; normalized relief area is not greater than design relief area, i.e., 10C H2/3The pressure relief area is not more than designed.
According to 'building design fire protection code' GB50016-2014 (2018 edition) table 3.6.4), the pressure relief ratio C is 0.030-0.250, and the requirement of the code can be met, so that C is introducedDesign ofTaking 0.25, namely taking the value under the most unfavorable condition can meet the specification requirement.
According to the building design fire protection code (GB 50016-2014 (2018 edition) 3.6.2, 3.6.3, 3.6.4 and 3.6.14), explosion-proof measures are taken and pressure relief facilities are arranged on a warehouse or a part in the warehouse with explosion risk, wherein the weight of the pressure relief facilities is not more than 60 kg/square meter. Therefore, the external surface area of the building consists of a pressure relief area and a non-pressure relief area, and the pressure relief area and the non-pressure relief area are in an inverse proportion relation. The beam, the column, the block wall and the outer surface area are not counted in the pressure relief area, and in addition, the fireproof and explosion-proof wall body plays roles in fire prevention, explosion prevention and separation, so the fireproof and explosion-proof wall is not counted in the pressure relief area; the light roof board, the light wall, the door and the window outer surface are counted in the pressure relief area, but the outer wall body and the light roof covered by the inner beam and the pillar outer wall are not counted in the pressure relief area.
From the above outer surface area relief area location, the following equation can be derived:
Llength of pressure relief= L-column width;
Hpressure relief heightH-low wall height-boundary beam height;
Wwidth of pressure reliefWidth of = W-edge beam width-ridge beam width;
referring to the attached drawing 6, the long sides and the short sides of each fireproof subarea are the same, the fireproof subarea 2 is the fireproof subarea with the smallest pressure relief area, the pressure relief area of the fireproof subarea 2 meets the condition that the length-diameter ratio is less than or equal to 3, both the fireproof subareas 1 and 3 meet the condition that the length-diameter ratio is less than or equal to 3, and similarly, the designed pressure relief area of the fireproof subarea 2 is greater than or equal to the standard pressure relief area of the fireproof subarea 2, the designed pressure relief area of the fireproof subarea 1 is greater than or equal to the standard pressure relief area of the fireproof subarea 1, and the designed pressure relief area of the fireproof subarea 3 is greater than or equal to the standard pressure relief area of the fireproof subarea 3.
Mixing L with(fire zone 2) length of pressure relief=1/3 × L-0.6 meters (column width); h(fire partition 2) pressure relief heightH-1.2 meters (low wall height) -0.9 meters (sill height); w(fire partition 2) pressure relief WidthAnd the value of = W-0.4 m (side beam width) -0.4 m (roof beam width) -0.4 m (side beam width), and the value is substituted into 10 × C (L × W × H)2/3In the design of the pressure relief area less than or equal to (fire partition 2), the following inequality is obtained:
10*0.25*（1/3L*W*H）2/3less than or equal to 2 [ (H-0.9 m-1.2 m). + (1/3L-0.6 m) + (1/2W-0.4 m-0.2 m). + (1/3L-0.2 m)]；
L is more than or equal to 9.6 meters and less than or equal to 69.23 meters;
w is more than or equal to 2.6 meters and less than or equal to 18.75 meters;
h is more than or equal to 3 meters;
l W is less than or equal to 180 square meters;
1/3 where L [ (W + H). times.2 ]/(4 W.times.H) ≦ 3 simultaneous inequality, the following system of nonlinear equations can be obtained:
l is more than or equal to 9.6 meters and less than or equal to 69.23 meters;
w is more than or equal to 2.6 meters and less than or equal to 18.75 meters;
h is more than or equal to 3 meters;
l W is less than or equal to 180 square meters;
1/3*L*[(W+H)*2]/(4*W*H)≤3；
10*0.25*（1/3L*W*H）2/3less than or equal to 2 [ (H-0.9 m-1.2 m). + (1/3L-0.6 m) + (1/2W-0.4 m-0.2 m). + (1/3L-0.2 m)]；
The following results are obtained through calculation of the nonlinear equation system: l is more than or equal to 9.6 meters and less than or equal to 56.92 meters; w is more than or equal to 2.6 meters and less than or equal to 18.75 meters; h is not less than 4.52 m and not more than 4006410 x 1022Meter (maximum 2 significant digits remaining after the decimal point). Therefore, whether the length (L), the width (W) and the height (H) of the warehouse for storing the items A and B3 and 4 meet the pressure relief design requirement can be judged.
Compared with the prior art, the method has the advantages of few judging steps, omission of various basis conditions, simplicity and convenience, and capability of quickly and accurately judging whether the length (L), the width (W) and the height (H) of the warehouse for storing the 3 and 4 items of the class A meet the pressure release design requirement. Greatly quickening the project progress and obtaining good working efficiency and economic benefit.
Drawings
FIG. 1 is a value-taking diagram (a layer of schematic plan view) of the door width, the column cross section, the block wall width and the fireproof and explosion-proof wall width;
FIG. 2 is a diagram of slope measurements of a roof (schematic plan view of a roof covering);
FIG. 3 is a cross-sectional view of the door height, the beam cross-section, the block wall height, and the indoor and outdoor height difference;
FIG. 4 is a schematic side length view of a fire zone;
FIG. 5 is a schematic view of a fire rescue window arrangement;
FIG. 6 is a schematic view of a pillar, a fireproof and explosion-proof wall without the pressure relief area;
FIG. 7 is a schematic view of a beam and a low wall without the input of a pressure relief area;
FIG. 8 to FIG. 13 show L under constraint conditionsMIN、LMAX、WMIN、WMAX、HMIN、HMAXAnd solving screen capture of the result.
Detailed Description
Referring to the attached drawing 1, the method of the invention adopts data reasoning and nonlinear equation system calculation to obtain the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of the first class, and determines whether the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of the first class are in the value ranges, and further determines whether the pressure release design requirements are met, and the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of the first class are calculated, and the method specifically comprises the following steps:
(one) determining a monomer area indicator
According to the building design fire protection code GB50016-2014 (2018 edition) table 3.3.2, only single-layer small warehouses are allowed to be built for the items A and B, the maximum floor area of each small warehouse is 180 square meters, the maximum allowable area of each fire protection subarea of the warehouse is not more than 60 square meters, and accordingly, the building area for storing the items A and B, 3 and 4 warehouses is determined to be not more than 180 square meters, and the area of each fire protection subarea is not more than 60 square meters.
(II) determining the value of each part component
Referring to fig. 3, according to article 6.8.6 of unified design for civil buildings GB50352-2019, the minimum clear height for evacuation is determined to be 2.0 meters, and the height of the door frame at the top is 2.1 meters.
Referring to the attached drawings 1 and 3, according to the building design fire protection code GB50016-2014 (2018 edition) 7.2.4 strips and 7.2.5 strips, the clear width of a fire rescue window is not less than 1.0 m, and the width of a door frame (a steel door commonly used for a warehouse evacuation door) is increased, wherein the width of the door is 1.2 m (easy-to-break safety glass is arranged at the upper part of the door and can be used as the fire rescue window), and in addition, the indoor height difference is 0.15 m for facilitating transportation.
Referring to the attached figure 2, the roof is a light roof, and the slope is unchanged according to the conventional 5 percent value.
Referring to the attached drawings 1 and 3, according to the size of the current building, beams, pillars, block walls and fireproof and explosion-proof walls, the cross section of the fireproof and explosion-proof walls is taken according to the worst condition, the cross section of the pillars is taken to be 0.6 meter (long) x 0.6 meter (wide), the cross section of the beams is taken to be 0.4 meter (wide) x0.9 meter (high), the block short walls are taken to be 1.2 meter (high) x 0.24 meter (wide), and the fireproof and explosion-proof walls are taken to be 0.24 meter (wide).
Based on the fact that the pressure relief area is inversely proportional to the non-pressure relief area, the lower limit value is adopted for the components of each part of the pressure relief area, and the upper limit value is adopted for the components of each part of the non-pressure relief area, so that the requirement of the pressure relief area specified by a standard can be met under the condition that the pressure relief area is minimum.
Thirdly, preliminarily determining the respective value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the 3 and 4 items of the A class according to the building design specification and data reasoning
Referring to fig. 4, in the step (a) of determining the index of the monomer area, the warehouse regulations for clearly storing 3 and 4 items of class a require that the area of the warehouse building is not more than 180 square meters, the area of each fire-proof subarea is not more than 60 square meters, the warehouse building is divided into 3 fire-proof subareas in total, and the W of each fire-proof subareaPartitioningThe sides and the X sides have the same length.
Referring to fig. 5, according to the "architectural design fire protection code" GB50016-2014 (2018 edition) 6.3.1, the horizontal distance between the nearest edges of the door, window and hole on both sides of the fire wall should not be less than 2.0 meters.
Referring to fig. 5, according to item GB50016-2014 (2018 edition) 7.2.5 in the "architectural design fire protection code", the clear height and the clear width of the window for fire rescue personnel to enter should not be less than 1.0 meter, the distance between the windows should not be more than 20 meters, and each fire-protection zone should not be less than 2.
Referring to FIG. 5, the following set of equations is set forth:
a + B = C + D; c + D = E + F; b + C is more than or equal to 2 meters; d + E is more than or equal to 2 meters; 1/2 (B + C) = a; 1/2 (D + E) = F;
solving the above system of equations yields: a = B = C = D = E = F =1 meter;
as can be seen from the equation set above, the value obtained at this time is the minimum value of the long side X of each fire zone, namely X MIN1+1.2+1=3.2 m, whereby 3 X.gtoreq.9.6 m, i.e. L, is deducedMINNot less than 9.6 m.
In the step (one), the building area of the warehouse for definitely storing the items A and B3 and 4 in the index of the monomer area determined in the step (one) is not more than 180 degreesSquare meter, it can be seen that L W is less than or equal to 180 square meter. When L takes the minimum value, i.e. LMINWhen =9.6 m, W is the maximum value, and hence L is known to beMIN*WMAXLess than or equal to 180 square meters, WMAXLess than or equal to 18.75 meters.
Referring to fig. 1, the width (W) is composed of the widths of pillars at two sides and the distance between the pillars, the width of the pillars is 0.6 m (considered from the most adverse factors), the distance between the pillars is the minimum value meeting the evacuation requirement of fire protection design, namely 1.4 m (refer to (specification for fire protection of building design GB50016-2014 (2018 edition) No. 3.7.5), and the W is determinedMINNot less than 0.6 m +1.4 m +0.6 m =2.6 m, and WMAXNot more than 18.75 meters, and primarily determining that W is not less than 2.6 meters and not more than 18.75 meters.
Referring to FIG. 5, known LMINNot less than 9.6 m, L W not more than 180 square meter, when W is minimum value, W isMINIf =2.6 m, L is the maximum value, and L can be obtained therefromMAX*WMIN≤180，LMAXLess than or equal to 69.23 meters, so that the L less than or equal to 69.23 meters is preliminarily determined to be less than or equal to 9.6 meters.
And (5) in the step (II), determining the values of the components of each part, wherein the beam height is 0.9 m and the gate height is 2.1 m due to the most adverse factors. From this, the minimum height (H) of the building warehouseMIN) Not less than 3 m, due to the maximum height (H)MAX) No relevant design specification limit, and no maximum height (H)MAX) Therefore, the H of the warehouse is preliminarily determined to be more than or equal to 3 meters.
Fourthly, according to the building design specification and the calculation of the nonlinear equation set, the respective value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the items A and B3 and 4 are verified and determined
And (3) preliminarily determining the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the items A and B, namely L is more than or equal to 9.6 meters and less than or equal to 69.23 meters, W is more than or equal to 2.6 meters and less than or equal to 18.75 meters, and H is more than or equal to 3 meters.
According to the 'architectural design fireproof specification' GB50016-2014 (2018 edition) No. 3.6.4, the length (L), width (W) and height (H) of a building have the length-diameter ratio of no more than 3, namely L [ (W + H) × 2](4W H) is less than or equal to 3; normalized pressure relief areaDesign relief area ≦ 10C H2/3The pressure relief area is not more than designed.
According to 3.6.4 bars in the 'building design fire protection Specification' GB50016-2014 (2018 edition), the pressure relief ratio C is 0.030-0.250, so that the requirement of the Specification can be met, and the conclusion is that CDesign ofTaking 0.25, namely taking the value under the most unfavorable condition can meet the specification requirement.
According to the building design fire protection code GB50016-2014 (2018 edition) 3.6.2 strips, 3.6.3 strips, 3.6.4 strips and 3.6.14 strips, explosion-proof measures are taken and pressure relief facilities are arranged on a warehouse with explosion risks or positions with explosion risks in the warehouse, and the weight of the pressure relief facilities is not more than 60 kg/square meter. Therefore, the external surface area of the building consists of a pressure relief area and a non-pressure relief area, and the pressure relief area and the non-pressure relief area are in an inverse proportion relation.
Referring to the attached drawings 6-7, the beam, the pillar, the block wall and the outer surface area are not counted in the pressure relief area, and in addition, the fireproof and explosion-proof wall does not count in the pressure relief area because the fireproof and explosion-proof wall plays the roles of fire prevention, explosion prevention and separation; the light roof board, the light wall, the door and the window outer surface are counted in the pressure relief area, but the outer wall body and the light roof covered by the inner beam and the pillar outer wall are not counted in the pressure relief area.
From the above outer surface area relief area location, the following equation can be derived:
Llength of pressure relief= L-column width;
Hpressure relief heightH-low wall height-boundary beam height;
Wwidth of pressure reliefAnd the width of the edge beam is not less than the width of the ridge beam.
Referring to FIG. 6, the broadside (W) of each fire zonePartitioning) Long limit (X) all the same, and fire prevention subregion 2 is the minimum fire prevention subregion of pressure release area, and the pressure release area of fire prevention subregion 2 satisfies that draw ratio is less than or equal to 3, then fire prevention subregion 1, 3 all can satisfy draw ratio and be less than or equal to 3, and on the same hand, the design pressure release area of fire prevention subregion 2 is greater than or equal to the standard pressure release area of fire prevention 2, then the design pressure release area of fire prevention subregion 1 is greater than or equal to the standard pressure release area of fire prevention subregion 1, the design pressure release area of fire prevention subregion 3 is greater than or equal to the standard pressure release area of fire prevention subregion 3.
Mixing L with(fire zone 2) length of pressure relief=1/3 × L-0.6 meters (column width); h(fire partition 2) pressure relief heightH-1.2 meters (low wall height) -0.9 meters (sill height); w(fire partition 2) pressure relief WidthAnd the value of = W-0.4 m (side beam width) -0.4 m (roof beam width) -0.4 m (side beam width), and the value is substituted into 10 × C (L × W × H)2/3Design the pressure relief area less than or equal to (fire partition 2) to obtain the inequality 10X 0.25X (1/3L W H)2/3Less than or equal to 2 [ (H-0.9 m-1.2 m). + (1/3L-0.6 m) + (1/2W-0.4 m-0.2 m). + (1/3L-0.2 m)]L is more than or equal to 9.6 meters and less than or equal to 69.23 meters, W is more than or equal to 2.6 meters and less than or equal to 18.75 meters, H is more than or equal to 3 meters, L is less than or equal to 180 square meters, 1/3L [ (W + H). multidot.2 meters]And (4W H) is less than or equal to 3, and the following nonlinear equation set can be obtained:
l is more than or equal to 9.6 meters and less than or equal to 69.23 meters; w is more than or equal to 2.6 meters and less than or equal to 18.75 meters; h is more than or equal to 3 meters; l W is less than or equal to 180 square meters;
1/3*L*[(W+H)*2]/(4*W*H)≤3；10*0.25*（1/3L*W*H）2/3less than or equal to 2 [ (H-0.9 m-1.2 m). + (1/3L-0.6 m) + (1/2W-0.4 m-0.2 m). + (1/3L-0.2 m)]。
The following are calculated: l is more than or equal to 9.6 meters and less than or equal to 56.92 meters; w is more than or equal to 2.6 meters and less than or equal to 18.75 meters; h is not less than 4.52 m and not more than 4006410 x 1022Meter (maximum 2 significant digits remaining after the decimal point).
The solution under the constraint condition is as follows:
referring to FIG. 8, L under constraintMINThe solution result of (2).
Referring to FIG. 9, L under constraintMAXThe solution result of (2).
With reference to FIG. 10, W under constraintMINThe solution result of (2).
With reference to FIG. 11, W under constraintMAXThe solution result of (2).
Referring to FIG. 12, constraint HMINThe solution result of (2).
Referring to FIG. 13, constraint HMAXThe solution result of (2).
The present invention will be described and explained in further detail below by taking a lithium battery storage warehouse to be newly built in a certain construction unit as an example:
example 1
In order to build a lithium battery storage warehouse (lithium belongs to class A4 articles, the pressure relief ratio C value is 0.110), the length (L) is 24.9 meters, the width (W) is 7.2 meters, and the height (H) is 7.6 meters, information such as columns, beams, building block short walls, the size and the position of a door, the size and the position of a window, the size and the position of a roof drainage ditch width and the like is unknown, and whether the size warehouse meets the pressure relief design requirement needs to be determined on site.
The value ranges of three dimensional sizes and areas of the warehouse for storing the 3 and 4 items of the class A, which are determined by data reasoning and calculation, namely L is more than or equal to 9.6 meters and less than or equal to 56.92 meters, W is more than or equal to 2.6 meters and less than or equal to 18.75 meters, H is more than or equal to 4.52 meters and less than or equal to 4006410 x 1022The square meter L and W is less than or equal to 180 square meters, and the warehouse can meet the design requirement of pressure relief.
The following steps are carried out according to the conventional judgment:
step one, determining a specific number of a pressure relief ratio C value according to a stored article;
secondly, defining the position and size of an evacuation door and the position and size of a fire rescue window, providing the size of the cross section of each of the pillars, the beams and the block low walls, and providing the size of the width of the roof drainage ditch;
thirdly, judging whether the length-diameter ratio formula requirement (L [ (W + H) × 2) is met]V (4W H) is less than or equal to 3), whether the standard pressure relief area formula requirement (10C W H) is met or not2/3Not more than design pressure relief area) and the like, whether the pressure relief design requirement is met can be judged, and the judging step is complex and tedious. The method has fewer judging steps, omits various basis conditions, can quickly and accurately judge the pressure relief design, and obtains good efficiency and benefit for accelerating the engineering progress.
The invention is further described and not intended to be limited to the specific embodiments disclosed, but rather, the invention is to be accorded the full scope and equivalents thereof.

Claims (1)

1. A method for judging pressure release design of a warehouse for storing 3 and 4 items of A-type goods is characterized in that value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of A-type goods are obtained by adopting a method of data reasoning and nonlinear equation system calculation according to constraint conditions of building design specifications, whether the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of A-type goods meet pressure release design requirements is judged according to the value ranges, and the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing 3 and 4 items of A-type goods are determined, and the method specifically comprises the following steps:
(one) determining an index of the area of the monomer
According to the 'building design fire protection code', the 3 and 4 items of the storage class A are determined to be allowed to build a single-layer warehouse only, the building area is less than or equal to 180 square meters, the maximum area of each fire protection subarea is less than or equal to 60 square meters, the total number is 3 fire protection subareas, and the wide edge (W) of each fire protection subareaPartitioning) The long sides (X) are the same;
(II) determining the value of each part component
The minimum evacuation clear height is determined to be 2.0 meters according to the unified design standards of civil buildings, and the height of a door frame at the top is added to determine the height of the door to be 2.1 meters;
determining the door width to be 1.2 meters and the indoor height difference to be 0.15 meter according to the clear width of a fire rescue window of 'building design fire protection code' to be more than or equal to 1.0 meter and the width of a door frame;
according to the current building size, beams, pillars and block walls, the cross section of the pillar is 0.6 meter (length) x 0.6 meter (width) under the most unfavorable condition; the cross section of the beam is 0.4 meter (width) x0.9 meter (height); the block short wall is 1.2 meters (height) x 0.24 meters (width); the explosion-proof wall is 0.24 meter (wide); the slope of the roof is 5% (double slopes);
based on the fact that the pressure relief area is inversely proportional to the non-pressure relief area, the components of each part of the pressure relief area take lower limit values, and the components of each part of the non-pressure relief area take upper limit values, so that the requirement of the pressure relief area specified by a standard can be met under the condition that the pressure relief area is minimum;
thirdly, preliminarily determining the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the 3 and 4 items of the A class according to the building design specification and data reasoning
According to the 'building design fire protection code', the horizontal distance of the nearest edge between the door, the window and the opening at the two sides of the fire protection wall is not less than 2.0 m, the net height and the net width of fire rescue workers entering the window are not less than 1.0 m, the distance is not more than 20 m, and each fire protection partition is not less than 2, so that the minimum value of the long edge (X) of each fire protection partition is obtained, namely X is the minimum value of the long edge (X) of each fire protection partitionMINNot less than 3.2 m, LMINNot less than 9.6 m;
determining the area of the building to be less than or equal to 180 square meters according to the step (one), and then obtaining the length (L) and the width (W) of the warehouse to be less than or equal to 180 square meters when the length (L) is the minimum value, namely the minimum length (L)MIN) When =9.6 m, the width (W) is the maximum value, and the minimum length (L) is thus knownMIN) Maximum width (W)MAX) Less than or equal to 180 square meters and maximum width (W)MAX) Not more than 18.75 meters, the width (W) is composed of the width of the pillars at two sides and the distance between the pillars, the width of the pillars is 0.6 meter, the distance between the pillars is the minimum value which meets the evacuation requirement of the fire protection design, namely 1.4 meters, and the minimum width (W) is determinedMIN) Not less than 0.6 m +1.4 m +0.6 m =2.6 m, plus the maximum width (W)MAX) And (3) the width (W) value range of the warehouse is preliminarily determined to be less than or equal to 18.75 meters:
the width (W) is more than or equal to 2.6 meters and less than or equal to 18.75 meters;
according to a known minimum length (L)MIN) More than or equal to 9.6 meters, length (L) and width (W) less than or equal to 180 square meters, and when the width (W) takes the minimum value, namely the minimum width (W)MIN) When =2.6 m, the length (L) is the maximum value, and the maximum length (L) can be obtained by thisMAX) Minimum width (W)MIN) Less than or equal to 180 square meters and maximum length (L)MAX) 69.23 m or less, thus preliminarily determining the length (L) value range of the warehouse: the length (L) is less than or equal to 9.6 meters and less than or equal to 69.23 meters;
the height of the beam determined according to the step (II) is 0.9 meter, the height of the door is 2.1 meters, and therefore the minimum height (H) of the building can be obtainedMIN) Not less than 3 m, therefore, the height (H) of the warehouse is not less than 3 m preliminarily determined;
fourthly, calculating according to the building design specification and the nonlinear equation set, verifying and determining the value ranges of the length (L), the width (W) and the height (H) of the warehouse
According to the fireproof standard of building design, the value ranges of the length (L), the width (W) and the height (H) of the warehouse are preliminarily determined in the step (three), and the length-diameter ratio of the value ranges is not more than 3, namely the length (L) [ (width (W) + height (H)) ] 2](4 width (W) height (H)). ltoreq.3; normalized pressure relief area is not greater than design pressure relief area, i.e., 10 pressure relief ratio (C) (length (L). times.width (W). times.height (H))2/3The design pressure relief area is not more than the design pressure relief area, and the pressure relief ratio (C) = 0.030-0.250 according to the standard requirement, thereby pushing out the design of the pressure relief ratio (C)Design of) The value is 0.25, and the following nonlinear equation set is obtained:
the length (L) is less than or equal to 9.6 meters and less than or equal to 69.23 meters;
the width (W) is more than or equal to 2.6 meters and less than or equal to 18.75 meters;
the height (H) is more than or equal to 3 m;
the length (L) and the width (W) are less than or equal to 180 square meters;
1/3 length (L) [ (width (W) + height (H)) + 2]/(4 width (W) × height (H)) ≦ 3;
10 x 0.25 x (1/3 length (L) width (W) height (H))2/3Less than 2X [ (height (H) -0.9-1.2 m). + - (1/3 length (L) -0.6 m) + width (1/2W) -0.4-0.2 m) (. 1/3 length (L) -0.2 m))]；
Solving the nonlinear equation, verifying and determining the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the items A and B3 and 4 respectively as follows: the length (L) is less than or equal to 9.6 meters and less than or equal to 56.92 meters; the width (W) is more than or equal to 2.6 meters and less than or equal to 18.75 meters; 4.52 m or less, height (H) or more, 4006410 x 10 or less22And (3) judging whether the length (L), the width (W) and the height (H) of the warehouse for storing the 3 and 4 items of the class A meet the design requirement of pressure relief or not.
CN202111126561.2A 2021-09-26 2021-09-26 Pressure relief design determination method for warehouse for storing 3 and 4 items of class A Pending CN113868741A (en)

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