CN113806849A - Pressure relief design determination method for warehouse for storing items A1, 2, 5 and 6 - Google Patents
Pressure relief design determination method for warehouse for storing items A1, 2, 5 and 6 Download PDFInfo
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Abstract
The invention discloses a method for judging the pressure release design of a warehouse for storing items A1, 2, 5 and 6, which is characterized in that the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing items A1, 2, 5 and 6 are obtained by adopting a data reasoning and nonlinear equation system 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 items A1, 2, 5 and 6 meet the pressure release design requirement is judged. Compared with the prior art, the method has the advantages of quickly and accurately judging whether the warehouse of 1, 2, 5 and 6 items of the to-be-built A-type objects 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
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 1, 2, 5 and 6 items of class A.
Background
At present, in the process of judging the pressure release design of a warehouse for storing items A1, 2, 5 and 6, after knowing the length (L), width (W) and height (H) of the warehouse for storing items A1, 2, 5 and 6, judging whether the pressure release design is met, three steps are needed: 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; thirdly, judging whether to useSatisfies the length-diameter ratio formula requirement (L [ (W + H). times.2)]V (4W H) is less than or equal to 3), whether the standard pressure relief area formula requirement is met (10C (1/3L W H)2/3Not more than the designed pressure relief area) and the like, whether the pressure relief design is satisfied can be determined. The method gives the size of the width of a roof drainage ditch according to the length (L), the width (W), the height (H), the respective section sizes of a column, a beam and a short wall, the position and the size of an evacuation door and the position and the size of a fire rescue window of a known storage class A1, 2, 5 and 6 warehouse, and judges whether the length-diameter ratio formula (L [ (W + H) × 2) is full or not through design specifications and calculation]4W H3, pressure relief area formula (10C W H1/3L)2/3No more than design pressure relief area), and the like, and finally whether the pressure relief design is satisfied is judged.
The pressure relief design judgment in the prior art is difficult to apply to quick and accurate judgment results under the condition that the length (L), the width (W) and the height (H) of a warehouse for storing 1, 2, 5 and 6 items of the class A are only known, so that not only is the judgment process complicated, time and labor are wasted, and the working efficiency is low, but also 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 design a method for judging the pressure relief design of a warehouse for storing items A1, 2, 5 and 6, which aims at overcoming the defects of the prior art, and adopts a method of data reasoning and nonlinear equation system calculation according to the constraint conditions of building design specifications to obtain the respective value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing items A1, 2, 5 and 6.
The purpose of the invention is realized as follows: a method for judging pressure release design of a warehouse for storing items A1, 2, 5 and 6 is characterized in that value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing items A1, 2, 5 and 6 are obtained by adopting a method of data reasoning and nonlinear equation set 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 items A1, 2, 5 and 6 are in the value ranges is judged, whether 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 items A1, 2, 5 and 6 are calculated, and specifically the method 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 a single-layer warehouse is allowed to be built for storing items A1, 2, 5 and 6, the floor area of the warehouse does not exceed 750 square meters, the maximum allowable area of each fire protection partition of the warehouse is not more than 250 square meters, and accordingly, the building area of the warehouse for storing the items A1, 2, 5 and 6 is determined to be not more than 750 square meters, and the area of each fire protection partition is not more than 250 square meters.
(II) determining the value of monomer 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 the 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 5% of the conventional value.
According to the current building size, beams, pillars, block walls, fireproof and explosion-proof walls and drainage ditches, 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) x 0.9 meter (high), the block short walls are taken to be 1.2 meter (high) x 0.24 meter (wide), the fireproof and explosion-proof walls are taken to be 0.24 meter (wide), and the total width of the drainage ditches is taken to be 0.7 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 items A1, 2, 5 and 6 by adopting data reasoning and calculation according to the constraint conditions of the building design specification
In the step (I), in determining the single area index, the specification requires that the building area of the warehouse for storing the items A1, 2, 5 and 6 is not more than 750 square meters, the area of each fireproof subarea is not more than 250 square meters, the total number of the fireproof subareas is 3, and the length of the W edge and the length of the X edge of each fireproof subarea are 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 workers 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 subarea should not be less than 2.
Referring to FIG. 5, the following equations can be set forth according to the known conditions described above:
a + B = E + F = C + D = E + F ≥ 2.1 m;
a is more than or equal to 1.2 meters; f is more than or equal to 1.2 meters;
b is more than or equal to 0.9 meter; c is more than or equal to 0.9 meter; d is more than or equal to 0.9 meter; e is more than or equal to 0.9 meter;
b + C is more than or equal to 2 meters;
d + E is more than or equal to 2 meters;
solving to obtain: a is more than or equal to 1.2 meters; b is more than or equal to 1.0 meter; c is more than or equal to 1.1 m; d is more than or equal to 1.1 m; e is more than or equal to 1.0 meter; f is more than or equal to 1.2 m
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 XMIN2.2+1.2=3.4 m, whereby 3X is deduced to be 10.2 m or more,namely LMINNot less than 10.2 m.
In the step (one) of determining the monomer area index, the specification requires that the warehouse building area for storing items A1, 2, 5 and 6 is not more than 750 square meters, so that L W is not more than 750 square meters. When L takes the minimum value, i.e. LMINWhen =10.2 m, W is the maximum value, and hence L is known to beMIN*WMAXNot more than 750 square meters, WMAXIs less than or equal to 73.53 meters. The width (W) is composed of the width of pillars on 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 width 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 =4.6 m, and WMAXNot more than 73.53, and primarily determining that W is not less than 4.6 meters and not more than 73.53 meters.
Referring to FIG. 5, known LMINNot less than 10.2 m, L W not more than 750 square meter, when W is minimum value, W isMINIf =4.6 m, L is the maximum value, and L can be obtained therefromMAX*WMIN≤750，LMAX163.04 m or less, thus, initially determining that L is 10.2 m or less and 163.04 m or less.
In the step (II), the value of the monomer component is determined, and the height of the beam is 0.9 m and the height of the door is 2.1 m, so that the minimum height (H) of the warehouse can be knownMIN) And the H of the warehouse is preliminarily determined to be more than or equal to 3 meters (high), because no maximum height-related legal and regulatory limit and reasoning and calculation basis exist.
And (IV) verifying and determining the respective value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the items A1, 2, 5 and 6 by adopting data reasoning and nonlinear equation system calculation according to the constraint conditions of the building design specification
In the third step, according to the building design specification and data inference, the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the items A1, 2, 5 and 6 are preliminarily determined, namely L is more than or equal to 10.2 meters and less than or equal to 163.04 meters, W is more than or equal to 4.6 meters and less than or equal to 73.53 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 specifications (GB 50016-2014 (2018 edition) table 3.6.4), the specification requirements can be met by taking 0.030-0.250 part of C. In addition, according to the building design fire protection code (GB 50016-2014 (2018 edition) 3.1.3 article interpretation table 3), hydrogen belongs to item 2A, and the pressure relief ratio C needs to be 0.25. Furthermore, CDesign ofTaking 0.25 as the most unfavorable factor value can ensure that the specification requirement is met.
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 areas of the beam, the column, the block wall and the outer surface are not counted in the pressure relief area. In addition, the fireproof and explosion-proof wall plays roles of fire prevention, explosion prevention and separation. Therefore, the fireproof and explosion-proof wall does not account for the pressure relief area. The pressure relief area is counted into to light roof boarding, light wall body, door, window external surface, but does not count into by the outer wall body that inside roof beam, post outer wall sheltered from in the pressure relief area, and the light roofing that is sheltered from by inside roof beam, escape canal does not count into in the pressure relief area yet.
From the above outer surface area relief area location, the following equation can be derived:
Ldesign of= L-column width;
Hdesign ofH-low wall height-boundary beam height;
Wdesign of= W-gutter width-roof beam width;
referring to the attached drawing 6, the long sides of the fire-proof partitions are the same, the short sides of the fire-proof partitions are the same, the fire-proof partition 2 is the fire-proof partition with the smallest pressure relief area, the pressure relief area of the fire-proof partition 2 meets the condition that the length-diameter ratio is less than or equal to 3, both the fire- proof partitions 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 fire-proof partition 2 is greater than or equal to the standard pressure relief area of the fire-proof partition 2, the designed pressure relief area of the fire-proof partition 1 is greater than or equal to the standard pressure relief area of the fire-proof partition 1, and the designed pressure relief area of the fire-proof partition 3 is greater than or equal to the standard pressure relief area of the fire-proof partition 3.
Mixing L withFireproof partition 2 (outer wall pressure relief surface)=1/3L-0.6 meters (column width) × 4; l isFireproof partition 2 (roof pressure relief surface)=1/3L-0.4 meters (beam width) × 4; hFire protection partition 2H-1.2 m (low wall height) -0.9 m (boundary beam height) and WFire protection partition 2(ix) = W-0.7 m (gutter width) × 2-0.4 m (roof beam width), substituted into 10 × C (1/3L × W × H)2/3Design pressure relief area of not more than (fire partition 2) to obtain 10X 0.25X (1/3X L W H)2/3Less than or equal to 2X [ (H-0.9 m-1.2 m). + (1/3L-0.6 m 4) + (1/2W-0.7 m-0.2 m) (1/3L-0.4 m 4)]L is more than or equal to 10.2 meters and less than or equal to 163.04 meters, W is more than or equal to 4.6 meters and less than or equal to 73.53 meters, H is more than or equal to 3 meters, L is less than or equal to 750 square meters, 1/3 is L [ (W + H) × 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 10.2 meters and less than or equal to 163.04 meters;
w is more than or equal to 4.6 meters and less than or equal to 73.53 meters;
h is more than or equal to 3 meters;
l W is less than or equal to 750 square meters;
1/3*L*[(W+H)*2]/(4*W*H)≤3；
10*0.25*（1/3*L*W*H）2/3less than or equal to 2X [ (H-0.9 m-1.2 m). + (1/3L-0.6 m 4) + (1/2W-0.7 m-0.2 m) (1/3L-0.4 m 4)]。
The following results are obtained through calculation of the nonlinear equation system: l is more than or equal to 10.2 meters and less than or equal to 116.19 meters; w is more than or equal to 4.6 meters and less than or equal to 73.53 meters; h is more than or equal to 6.02 m and less than or equal to 2131287 x 1022Meter (maximum 2-bit significant figure reserved after decimal point) and L under constraint conditionMIN、LMAX、WMIN、WMAX、HMIN、HMAXThe solution result of (2).
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 items A, A2, A5 and A6 meet the pressure release design requirements, greatly accelerating the engineering 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 beams, low walls, and drainage ditches without including pressure relief areas;
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 drawings 1-2, the method of the invention adopts a data reasoning and nonlinear equation set calculation method according to the constraint conditions of the building design specifications to obtain the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing items A1, 2, 5 and 6, judges whether the length (L), the width (W) and the height (H) of the warehouse for storing items A1, 2, 5 and 6 are in the value ranges, further judges whether the pressure release design requirements are met, and calculates the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing items A1, 2, 5 and 6, 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 a single-layer warehouse is allowed to be built for storing items A1, 2, 5 and 6, the floor area of the warehouse does not exceed 750 square meters, the maximum allowable area of each fire protection partition of the warehouse is not more than 250 square meters, and accordingly, the building area of the warehouse for storing the items A1, 2, 5 and 6 is determined to be not more than 750 square meters, and the area of each fire protection partition is not more than 250 square meters.
(II) determining the value of monomer component
Referring to fig. 3, according to unified design for civil buildings standard (GB 50352-2019 article 6.8.6), the minimum clear evacuation height is determined to be 2.0 meters, plus the height of the top door frame, which is 2.1 meters.
Referring to the attached drawings 1 and 3, according to the 'architectural 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, 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 (the upper part of the door is provided with easy-to-break safety glass which can be used as the fire-fighting rescue window, and in addition, the height difference in a transport room is 0.15 m for convenience.
Referring to the attached figure 2, the roof is a light roof, and the slope is 5% of the conventional value.
Referring to the attached drawings 1 and 3, according to the current building size, beams, pillars, block walls, fireproof and explosion-proof walls and drainage ditches, the cross section value under the worst condition is that the cross section of the pillars is 0.6 meter (long) x 0.6 meter (wide), the cross section of the beams is 0.4 meter (wide) x 0.9 meter (high), the block short walls are 1.2 meter (high) x 0.24 meter (wide), the fireproof and explosion-proof walls are 0.24 meter (wide), and the total width of the drainage ditches is 0.7 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 items A1, 2, 5 and 6 according to the constraint conditions and the data reasoning of the building design specification
Referring to the attached figure 4, in the step (one) of determining the index of the monomer area, the specification requires that the building area of the warehouse for storing 1, 2, 5 and 6 items of the class A is not more than 750 square meters, the area of each fireproof subarea is not more than 250 square meters, 3 fireproof subareas are divided in total, and the length of the W edge and the length of the X edge of each fireproof subarea are the same.
Referring to fig. 5, according to the "fire protection code for architectural design" (GB 50016-2014 (2018 edition) 6.3.1), the horizontal distance between the nearest edges of the door, window and hole on both sides of the firewall should not be 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 workers 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 subarea should not be less than 2.
Referring to FIG. 5, the following equations can be set forth according to the known conditions described above:
a + B = E + F = C + D = E + F ≥ 2.1 m;
a is more than or equal to 1.2 meters; f is more than or equal to 1.2 meters;
b is more than or equal to 0.9 meter; c is more than or equal to 0.9 meter; d is more than or equal to 0.9 meter; e is more than or equal to 0.9 meter;
b + C is more than or equal to 2 meters;
d + E is more than or equal to 2 meters;
solving to obtain: a is more than or equal to 1.2 meters; b is more than or equal to 1.0 meter; c is more than or equal to 1.1 m; d is more than or equal to 1.1 m; e is more than or equal to 1.0 meter; f is more than or equal to 1.2 m
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 XMIN2.2+1.2=3.4 m, whereby 3 X.gtoreq.10.2 m, i.e. L, is deducedMINNot less than 10.2 m.
In the step (one) of determining the monomer area index, the specification requires that the warehouse building area for storing items A1, 2, 5 and 6 is not more than 750 square meters, so that L W is not more than 750 square meters. When L takes the minimum value, i.e. LMINWhen =10.2 m, W is the maximum value, and hence L is known to beMIN*WMAXNot more than 750 square meters, WMAXIs less than or equal to 73.53 meters. The width (W) is composed of the width of pillars on 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 width meeting the evacuation requirement of fire protection design, namely 1.4 m (refer to (building design fire protection code GB50016-2014 (2018 edition) No. 3.7.5), and the W is determinedMINNot less than 0.6 m +1.4 m +0.6 m =4.6 m, plus WMAXNot more than 73.53, and preliminarily determining the width value range of the warehouse as follows: w is more than or equal to 4.6 meters and less than or equal to 73.53 meters.
Referring to FIG. 5, known LMINNot less than 10.2 m, L W not more than 750 square meter, when W is minimum value, W isMINIf =4.6 m, L is the maximum value, and L can be obtained therefromMAX*WMIN≤750，LMAX163.04 m or less, and therefore, the length range of the warehouse is preliminarily determined as follows: l is more than or equal to 10.2 meters and less than or equal to 163.04 meters.
In the step (II), in the determination of the values of the monomer components, the beam height is 0.9 meter and the door height is 2.1 meters for the most adverse factors, so that the minimum height (H) of the building can be knownMIN) The height of the warehouse is more than or equal to 3 meters (height), and because no maximum height-related legal and regulatory limit and reasoning calculation basis exist, the height value of the warehouse is preliminarily determined as follows: h is more than or equal to 3 meters.
Fourthly, according to the constraint conditions of the building design specifications and the calculation of a nonlinear equation system, verifying and determining the respective value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the items A1, 2, 5 and 6
In the third step, according to the building design specification and data inference, the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the items A1, 2, 5 and 6 are preliminarily determined, namely L is more than or equal to 10.2 meters and less than or equal to 163.04 meters, W is more than or equal to 4.6 meters and less than or equal to 73.53 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 specifications (GB 50016-2014 (2018 edition) table 3.6.4), the specification requirements can be met by taking 0.030-0.250 part of C. In addition, according to the building design fire protection code (GB 50016-2014 (2018 edition) 3.1.3 article interpretation table 3), hydrogen belongs to item A2, the pressure relief ratio C is required to be 0.25, and in addition, C is required to be in the designDesign ofTaking 0.25 as the most adverse factor value to ensure the satisfactionAnd (5) specification requirements.
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.
Referring to the attached figures 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 plays roles of fire prevention, explosion prevention and separation. Therefore, the fireproof and explosion-proof wall does not count the pressure relief area, the outer surfaces of the light roof panel, the light wall body, the door and the window count the pressure relief area, but the outer wall body shielded by the outer wall of the internal beam and the outer wall of the pillar does not count the pressure relief area, and the light roof shielded by the internal beam and the drainage ditch does not count the pressure relief area.
From the above outer surface area relief area location, the following equation can be derived:
Ldesign of= L-column width;
Hdesign ofH-low wall height-boundary beam height;
Wdesign of= W-gutter width-roof beam width;
referring to the attached drawing 6, the long sides of the fire-proof partitions are the same, the short sides of the fire-proof partitions are the same, the fire-proof partition 2 is the fire-proof partition with the smallest pressure relief area, the pressure relief area of the fire-proof partition 2 meets the condition that the length-diameter ratio is less than or equal to 3, both the fire- proof partitions 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 fire-proof partition 2 is greater than or equal to the standard pressure relief area of the fire-proof partition 2, the designed pressure relief area of the fire-proof partition 1 is greater than or equal to the standard pressure relief area of the fire-proof partition 1, and the designed pressure relief area of the fire-proof partition 3 is greater than or equal to the standard pressure relief area of the fire-proof partition 3.
Mixing L withFireproof partition 2 (outer wall pressure relief surface)=1/3L-0.6 m (column width) × 4, LFireproof partition 2 (roof pressure relief surface)=1/3L-0.4 meters (beam width) × 4; hFire protection partition 2H-1.2 m (low wall height) -0.9 m (boundary beam height) and WFire protection partition 2= W-0.7 m (drainage ditch)Width) 2-0.4 m (roof beam width), substituted into 10C (1/3L W H)2/3Design pressure relief area of not more than (fire partition 2) to obtain 10X 0.25X (1/3X L W H)2/3Less than or equal to 2X [ (H-0.9 m-1.2 m). + (1/3L-0.6 m 4) + (1/2W-0.7 m-0.2 m) (1/3L-0.4 m 4)]L is more than or equal to 10.2 meters and less than or equal to 163.04 meters, W is more than or equal to 4.6 meters and less than or equal to 73.53 meters, H is more than or equal to 3 meters, L is less than or equal to 750 square meters, 1/3 is L [ (W + H) × 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 10.2 meters and less than or equal to 163.04 meters;
w is more than or equal to 4.6 meters and less than or equal to 73.53 meters;
h is more than or equal to 3 meters;
l W is less than or equal to 750 square meters;
1/3*L*[(W+H)*2]/(4*W*H)≤3；
10*0.25*（1/3*L*W*H）2/3less than or equal to 2X [ (H-0.9 m-1.2 m). + (1/3L-0.6 m 4) + (1/2W-0.7 m-0.2 m) (1/3L-0.4 m 4)]；
The following results are obtained through calculation of the nonlinear equation system: l is more than or equal to 10.2 meters and less than or equal to 116.19 meters; w is more than or equal to 4.6 meters and less than or equal to 73.53 meters; h is more than or equal to 6.02 m and less than or equal to 2131287 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 an acetylene cylinder storage warehouse to be newly built in a certain construction unit as an example:
example 1
A certain construction unit wants to build a storage acetylene cylinder warehouse (2 articles of acetylene class A, the pressure relief ratio C value is 0.200), the length (L) is 49.8 meters, the width (W) is 10.8 meters, the height (H) is 6.6 meters, the information of columns, beams and building blocks is unknown, the size and the position of a door, the size and the position of a window, the size and the position of the width of a roof drainage ditch and the like, and whether the warehouse meets the pressure relief design requirement or not needs to be determined on site.
The value ranges of three dimensional sizes and areas of the warehouse for storing the items A1, 2, 5 and 6 are determined by data reasoning and calculation, namely L is more than or equal to 10.2 meters and less than or equal to 116.19 meters; w is more than or equal to 4.6 meters and less than or equal to 73.53 meters; h is more than or equal to 6.02 m and less than or equal to 2131287 x 1022The square meter L and W are less than or equal to 750 square meters, and the warehouse can meet the design requirement of pressure relief.
The conventional judgment according to the prior art needs to perform the following steps:
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 design requirement of the system pressure relief 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 the pressure relief design of a warehouse for storing items A1, 2, 5 and 6 is characterized in that the judgment of the pressure relief design specifically comprises the following steps:
(one) determining an index of the area of the monomer
According to the 'building design fire protection code', determining that only a single-layer warehouse is allowed to be built for storing 1, 2, 5 and 6 items of class A, the building area is less than or equal to 750 square meters, the maximum area of each fire protection subarea is less than or equal to 250 square meters, the total number is 3 fire protection subareas, and the wide side (W) of each fire protection subareaPartitioning) The long sides (X) are the same;
(II) determining the value of the monomer 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;
the roof is a light roof, and the slope is 5% of the conventional value;
according to the current building size, beams, pillars, block walls, fireproof and explosion-proof walls and drainage ditches, 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) x 0.9 meter (height); the block short wall is 1.2 meters (height) x 0.24 meters (width); the width of the fireproof and explosion-proof wall is 0.24 meter; the total width of the drainage ditch is 0.7 meter (wide);
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 items A1, 2, 5 and 6 by adopting data reasoning and calculation according to the constraint conditions of the building design specification
According to the building design fire protection standard, the horizontal distance of the nearest edge between the door, the window and the opening on the two sides of the fire protection wall is not less than 2.0 m; the clear height and the clear 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 partition should not be less than 2, so as to obtain the length (X) of each fire partitionMinimum value, i.e. XMINNot less than 3.4 m, LMINNot less than 10.2 m;
according to the requirements of 'building design fire protection code', the building area of the warehouse for storing 1, 2, 5 and 6 items of the A class is less than or equal to 750 square meters, so that the length (L) and the width (W) are less than or equal to 750 square meters, and when the length (L) is the minimum value, namely the minimum length (L)MIN) When =10.2 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 750 square meters and maximum width (W)MAX) Is less than or equal to 73.53 meters, the width (W) consists 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 width 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 =4.6 m, plus the maximum width (W)MAX) Not more than 73.53 m, and preliminarily determining the width (W) value range of the warehouse as follows: w is more than or equal to 4.6 meters and less than or equal to 73.53 meters;
according to a known minimum length (L)MIN) More than or equal to 10.2 meters, length (L) and width (W) less than or equal to 750 square meters, and when the width (W) takes the minimum value, namely the minimum width (W)MIN) If =4.6 m, the length (L) is the maximum value, and the maximum length (L) can be obtained therebyMAX) Minimum width (W)MIN) Less than or equal to 750 square meters and maximum length (L)MAX) 163.04 m, thus, the length (L) of the warehouse is preliminarily determined to be in the range of: the length (L) is less than or equal to 10.2 meters and less than or equal to 163.04 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;
and (IV) verifying and determining the value ranges of the length (L), the width (W) and the height (H) of the warehouse for storing the items A1, 2, 5 and 6 by adopting data reasoning and nonlinear equation system calculation according to the constraint conditions of the building design specification
And (c) preliminarily determining the length (L), the width (W) and the height (H) of the warehouse for storing the items A1, 2, 5 and 6 according to the building design specification and data reasoning, wherein the length (L), the width (W) and the height (H) are respectively as follows: the length (L) is more than or equal to 10.2 meters and less than or equal to 163.04 meters, the width (W) is more than or equal to 4.6 meters and less than or equal to 73.53 meters, and the height (H) is more than or equal to 3 meters;
according to the fireproof standard of building design, the length (L), width (W) and height (H) of the building have the length-diameter ratio of no more than 3, namely 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), width (W), height (H)2/3The designed pressure relief area is not more than the designed pressure relief area, and the pressure relief ratio (C) = 0.030-0.250 according to the standard requirement, so that the designed pressure relief ratio (C) is obtainedDesign of) The value is 0.25;
obtaining the pressure relief area part according to the external surface area: designed length (L)Design of) Length (L) -column width; designed height (H)Design of) Height (H) -low wall height-sill height; width of design (W)Design of) Width (W) -gutter width-ridge beam width, from which the following system of nonlinear equations is derived:
the length (L) is less than or equal to 10.2 meters and less than or equal to 163.04 meters;
the width (W) is more than or equal to 4.6 meters and less than or equal to 73.53 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 750 square meters;
1/3 length (L) [ (width (W) + height (H)) + 2]/(4 width (W) × height (H)) ≦ 3;
10 × 0.25 × 1/3 × length (L) × width (W) × height (H)2/3Less than 2X [ (height (H) -0.9-1.2 m). times (1/3X length (L) -0.6 m 4). times (1/2X width (W) -0.7-0.2 m). times (1/3X length (L) -0.4 m 4). times (L)]；
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 items A1, 2, 5 and 6 respectively as follows: the length (L) is less than or equal to 10.2 meters and less than or equal to 116.19 meters; the width (W) is more than or equal to 4.6 meters and less than or equal to 73.53 meters; height (H) of 6.02 m or more and 2131287 x 10 or less22Rice, from which it is determined that a warehouse is to be built for storing items A1, 2, 5, 6Whether the length (L), the width (W) and the height (H) meet the design requirements of pressure relief.
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