CN112726810A - Method for selecting building steel structure - Google Patents
Method for selecting building steel structure Download PDFInfo
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- CN112726810A CN112726810A CN202011579354.8A CN202011579354A CN112726810A CN 112726810 A CN112726810 A CN 112726810A CN 202011579354 A CN202011579354 A CN 202011579354A CN 112726810 A CN112726810 A CN 112726810A
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- steel
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- impact toughness
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a method for selecting a building steel structure, which relates to the technical field of steel structures, and is characterized in that the method is analyzed according to damage of wind to a building, and wind resistance design requirements must ensure that the structure is not damaged in the using process; firstly, the wind resistance design of the structure must meet the requirement of strength design, namely, the internal force of a structural member of the structure must meet the requirement of strength design under the combined action of wind load and other loads, and the damage phenomena of collapse, cracking, residual deformation and the like of a building under the action of wind power are avoided, so that the safety of the structure is ensured.
Description
Technical Field
The invention relates to the technical field of steel structures, in particular to a method for selecting a building steel structure.
Background
Steel structures are structures composed of steel materials and are one of the main building structure types. The structure mainly comprises steel beams, steel columns, steel trusses and other members made of section steel, steel plates and the like, and rust removing and preventing processes such as silanization, pure manganese phosphating, washing drying, galvanization and the like are adopted. The components or parts are typically joined by welds, bolts or rivets. Because of its light dead weight, and construction is simple and convenient, widely apply to fields such as large-scale factory building, venue, superelevation layer. The steel structure is easy to rust, and generally the steel structure needs to be derusted, galvanized or painted, and needs to be maintained regularly.
The selection and design of the steel structure are an important step of steel structure construction, the bearing capacity and the wind pressure resistance of the steel structure construction body are related, and the elements of temperature are also considered comprehensively, so that the invention provides a method for selecting the steel structure of the construction.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for selecting a building steel structure, which can meet the strength design requirement, ensure that the building cannot collapse, crack, residual deformation and other damage phenomena under the action of wind power, and ensure the safety of the structure.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the method for selecting the building steel structure comprises the following steps:
step 1: the influence of wind pressure on the steel structure is considered;
step 2: considering the influence of temperature on a steel structure;
and step 3: and (5) design standard of steel structure node connection.
As a further technical solution of the present invention, the step 1: the influence of wind pressure to the steel construction is considered, can divide into according to the wind to the direction difference of building power: 1) pressure generated on the windward side of the building (resistance generated by airflow flow); 2) a cross wind direction disturbance force (vortex disturbance force and turbulent pulsating pressure generated by gas flow) generated in a cross wind direction; 3) turbulence interference forces (including leeward suction) generated at the back of the building after air flows through the building; accurately determining wind load distribution through a model wind tunnel test;
the steel structure building needs to consider the wind vibration influence, and the calculation of the downwind response of the steel structure building is shown in a formula
(1)：wz＝βzυsυzw0 (1)
Wherein, wzIs the equivalent wind load at any height z, betazFor wind vibrationCoefficient, total equivalent coefficient considering dynamic influence under pulsating wind, upsilonsWind load form factor, upsilon, to be adjusted for the form of the structure at z-heightzIs the wind pressure height variation coefficient w at the place landform height z0Is the wind pressure at the height of 10m under the standard landform.
As a further technical scheme of the invention, in the wind tunnel test in step 1, for the calculation of lateral wind-induced response and equivalent static wind load of high-rise steel structure and super high-rise steel structure, firstly, structural parameters and wind environment parameters are obtained, then, the equivalent of transverse-wind-direction basement bending moment coefficient, resonance response peak factor and transverse-wind-direction generalized aerodynamic force modal correction factor is calculated, and finally, the structural transverse-wind-direction equivalent static wind load p (z) is calculated by each calculated amount through a formula (2), and then, the acceleration response and other transverse-wind-induced responses such as bending moment, shearing force and the like of the structure can be obtained;
the damage of wind to the building is analyzed, and the wind resistance design requirement must ensure that the structure is not damaged in the using process; firstly, the wind resistance design of the structure must meet the requirement of strength design, that is, the internal force of a structural member under the combined action of wind load and other loads must meet the requirement of strength design, so that the building cannot collapse, crack, residual deformation and other damage phenomena under the action of wind power, and the safety of the structure is ensured;
the deformation response of the high-rise building structure under the action of wind load is mainly limited by the following two aspects: firstly, the ratio of the top horizontal displacement of the structure to the total height H is limited, and the purpose is to control the total deformation of the structure; secondly, limiting the ratio of the relative horizontal displacement to the layer height between two adjacent layers of floor systems, aiming at preventing the filled wall and the decorative material from being damaged; the wind resistance design of the structure meets the design requirement of fatigue failure; wind vibration causes fatigue failure of tall steel structures or members as a result of fatigue accumulation damage.
As a further technical solution of the present invention, the step 2: considering the influence of temperature on a steel structure, the steel products of a welding bearing structure and an important non-welding bearing structure also have the qualified guarantee of a cold bending test; for steel products of welding structures which need to be checked and calculated for fatigue, the steel products have the qualified assurance of normal-temperature impact toughness;
when the structural working temperature is equal to or lower than 0 ℃ but higher than-200 ℃, Q235 steel and Q345 steel have qualified guarantee of 0 ℃ impact toughness; the Q390 steel and the Q420 steel are qualified and guaranteed to have impact toughness of 200 ℃ below zero;
when the structure working temperature is equal to or lower than minus 20 ℃, Q235 steel and Q345 steel are qualified and guaranteed to have impact toughness of minus 20 ℃; the Q390 steel and the Q420 steel are qualified and guaranteed to have-40 ℃ impact toughness; the steel of a non-welding structure which needs to be checked and calculated for fatigue also has the qualified guarantee of normal temperature impact toughness;
when the structure working temperature is equal to or lower than-20 ℃, the Q235 steel and the Q345 steel are qualified and guaranteed to have 0 ℃ impact toughness; the Q390 steel and the Q420 steel have the qualified guarantee of 20 ℃ impact toughness.
As a further technical solution of the present invention, the step 3: the design standard of steel structure nodal connection, the high-rise building steel frame of seismic fortification, its nodal connection's the biggest bearing capacity should accord with following requirement:
firstly, the beam and column connection should satisfy the following formula requirements:
MU≥1.2Mp (3)
VU≥1.3(2Mp/l) (4)
in the formula, Mu-the maximum bending bearing capacity is connected based on the node with the minimum ultimate strength, and is only born by the connection of flanges;
v- - -the maximum shear bearing capacity of the node connection based on the minimum ultimate strength is borne only by the connection of the web plates; the overall plastic bending bearing capacity of the Mp-beam member;
I-Beam Net span.
(III) advantageous effects
The invention provides a method for selecting a building steel structure. The method has the following beneficial effects:
1. according to the invention, the damage of wind to the building is analyzed, and the wind resistance design requirement must ensure that the structure is not damaged in the using process; firstly, the wind resistance design of the structure must meet the requirement of strength design, that is, the internal force of a structural member under the combined action of wind load and other loads must meet the requirement of strength design, so that the building cannot collapse, crack, residual deformation and other damage phenomena under the action of wind power, and the safety of the structure is ensured;
2. in the invention, the deformation response of the high-rise building structure under the action of wind load is mainly limited by the following two aspects: firstly, the ratio of the top horizontal displacement of the structure to the total height H is limited, and the purpose is to control the total deformation of the structure; secondly, limiting the ratio of the relative horizontal displacement to the layer height between two adjacent layers of floor systems, aiming at preventing the filled wall and the decorative material from being damaged; the wind resistance design of the structure meets the design requirement of fatigue failure; wind vibration causes fatigue failure of tall steel structures or members as a result of fatigue accumulation damage.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: the method for selecting the building steel structure comprises the following steps:
step 1: the influence of wind pressure on the steel structure is considered;
step 2: considering the influence of temperature on a steel structure;
and step 3: and (5) design standard of steel structure node connection.
As a further technical solution of the present invention, the step 1: the influence of wind pressure to the steel construction is considered, can divide into according to the wind to the direction difference of building power: 1) pressure generated on the windward side of the building (resistance generated by airflow flow); 2) a cross wind direction disturbance force (vortex disturbance force and turbulent pulsating pressure generated by gas flow) generated in a cross wind direction; 3) turbulence interference forces (including leeward suction) generated at the back of the building after air flows through the building; accurately determining wind load distribution through a model wind tunnel test;
the steel structure building needs to consider the wind vibration influence, and the calculation of the downwind response of the steel structure building is shown in a formula
(1)：wz＝βzυsυzw0 (1)
Wherein, wzIs the equivalent wind load at any height z, betazThe total equivalent coefficient upsilon is a wind vibration coefficient and considers the influence of power under pulsating windsWind load form factor, upsilon, to be adjusted for the form of the structure at z-heightzIs the wind pressure height variation coefficient w at the place landform height z0Is the wind pressure at the height of 10m under the standard landform.
As a further technical scheme of the invention, in the wind tunnel test in step 1, for the calculation of lateral wind-induced response and equivalent static wind load of high-rise steel structure and super high-rise steel structure, firstly, structural parameters and wind environment parameters are obtained, then, the equivalent of transverse-wind-direction basement bending moment coefficient, resonance response peak factor and transverse-wind-direction generalized aerodynamic force modal correction factor is calculated, and finally, the structural transverse-wind-direction equivalent static wind load p (z) is calculated by each calculated amount through a formula (2), and then, the acceleration response and other transverse-wind-induced responses such as bending moment, shearing force and the like of the structure can be obtained;
the damage of wind to the building is analyzed, and the wind resistance design requirement must ensure that the structure is not damaged in the using process; firstly, the wind resistance design of the structure must meet the requirement of strength design, that is, the internal force of a structural member under the combined action of wind load and other loads must meet the requirement of strength design, so that the building cannot collapse, crack, residual deformation and other damage phenomena under the action of wind power, and the safety of the structure is ensured;
the deformation response of the high-rise building structure under the action of wind load is mainly limited by the following two aspects: firstly, the ratio of the top horizontal displacement of the structure to the total height H is limited, and the purpose is to control the total deformation of the structure; secondly, limiting the ratio of the relative horizontal displacement to the layer height between two adjacent layers of floor systems, aiming at preventing the filled wall and the decorative material from being damaged; the wind resistance design of the structure meets the design requirement of fatigue failure; wind vibration causes fatigue failure of tall steel structures or members as a result of fatigue accumulation damage.
As a further technical solution of the present invention, the step 2: considering the influence of temperature on a steel structure, the steel products of a welding bearing structure and an important non-welding bearing structure also have the qualified guarantee of a cold bending test; for steel products of welding structures which need to be checked and calculated for fatigue, the steel products have the qualified assurance of normal-temperature impact toughness;
when the structural working temperature is equal to or lower than 0 ℃ but higher than-200 ℃, Q235 steel and Q345 steel have qualified guarantee of 0 ℃ impact toughness; the Q390 steel and the Q420 steel are qualified and guaranteed to have impact toughness of 200 ℃ below zero;
when the structure working temperature is equal to or lower than minus 20 ℃, Q235 steel and Q345 steel are qualified and guaranteed to have impact toughness of minus 20 ℃; the Q390 steel and the Q420 steel are qualified and guaranteed to have-40 ℃ impact toughness; the steel of a non-welding structure which needs to be checked and calculated for fatigue also has the qualified guarantee of normal temperature impact toughness;
when the structure working temperature is equal to or lower than-20 ℃, the Q235 steel and the Q345 steel are qualified and guaranteed to have 0 ℃ impact toughness; the Q390 steel and the Q420 steel have the qualified guarantee of 20 ℃ impact toughness.
As a further technical solution of the present invention, the step 3: the design standard of steel structure nodal connection, the high-rise building steel frame of seismic fortification, its nodal connection's the biggest bearing capacity should accord with following requirement:
firstly, the beam and column connection should satisfy the following formula requirements:
MU≥1.2Mp (3)
VU≥1.3(2Mp/l) (4)
in the formula, Mu-the maximum bending bearing capacity is connected based on the node with the minimum ultimate strength, and is only born by the connection of flanges;
v- - -the maximum shear bearing capacity of the node connection based on the minimum ultimate strength is borne only by the connection of the web plates; the overall plastic bending bearing capacity of the Mp-beam member;
I-Beam Net span.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A method for selecting a building steel structure is characterized by comprising the following steps: the method for selecting the building steel structure comprises the following steps:
step 1: the influence of wind pressure on the steel structure is considered;
step 2: considering the influence of temperature on a steel structure;
and step 3: and (5) design standard of steel structure node connection.
2. The method for selecting the construction steel structure according to claim 1, wherein the method comprises the following steps: the step 1: the influence of wind pressure to the steel construction is considered, can divide into according to the wind to the direction difference of building power: 1) pressure generated on the windward side of the building (resistance generated by airflow flow); 2) a cross wind direction disturbance force (vortex disturbance force and turbulent pulsating pressure generated by gas flow) generated in a cross wind direction; 3) turbulence interference forces (including leeward suction) generated at the back of the building after air flows through the building; accurately determining wind load distribution through a model wind tunnel test;
the steel structure building needs to consider the wind vibration influence, and the calculation of the downwind response of the steel structure building is shown in a formula
(1)：wz＝βzυsυzw0 (1)
Wherein, wzIs the equivalent wind load at any height z, betazThe total equivalent coefficient upsilon is a wind vibration coefficient and considers the influence of power under pulsating windsWind load form factor, upsilon, to be adjusted for the form of the structure at z-heightzIs the wind pressure height variation coefficient w at the place landform height z0Is the wind pressure at the height of 10m under the standard landform.
3. The method for selecting the construction steel structure according to claim 2, wherein: in the wind tunnel test in the step 1, for the calculation of lateral wind-induced response and equivalent static wind load of high-rise steel structures and super high-rise steel structures, firstly, structural parameters and wind environment parameters are obtained, then, the equivalent of a transverse-direction base bending moment coefficient, a resonance response peak factor and a transverse-direction generalized aerodynamic modal correction factor are calculated, and finally, the structural transverse-direction equivalent static wind load p (z) is calculated by each calculated amount through a formula (2), and then, the acceleration response and other transverse-wind-induced responses such as bending moment and shearing force of the structure can be obtained;
the damage of wind to the building is analyzed, and the wind resistance design requirement must ensure that the structure is not damaged in the using process; firstly, the wind resistance design of the structure must meet the requirement of strength design, that is, the internal force of a structural member under the combined action of wind load and other loads must meet the requirement of strength design, so that the building cannot collapse, crack, residual deformation and other damage phenomena under the action of wind power, and the safety of the structure is ensured;
the deformation response of the high-rise building structure under the action of wind load is mainly limited by the following two aspects: firstly, the ratio of the top horizontal displacement of the structure to the total height H is limited, and the purpose is to control the total deformation of the structure; secondly, limiting the ratio of the relative horizontal displacement to the layer height between two adjacent layers of floor systems, aiming at preventing the filled wall and the decorative material from being damaged; the wind resistance design of the structure meets the design requirement of fatigue failure; wind vibration causes fatigue failure of tall steel structures or members as a result of fatigue accumulation damage.
4. The method for selecting the construction steel structure according to claim 1, wherein the method comprises the following steps: the step 2: considering the influence of temperature on a steel structure, the steel products of a welding bearing structure and an important non-welding bearing structure also have the qualified guarantee of a cold bending test; for steel products of welding structures which need to be checked and calculated for fatigue, the steel products have the qualified assurance of normal-temperature impact toughness;
when the structural working temperature is equal to or lower than 0 ℃ but higher than-200 ℃, Q235 steel and Q345 steel have qualified guarantee of 0 ℃ impact toughness; the Q390 steel and the Q420 steel are qualified and guaranteed to have impact toughness of 200 ℃ below zero;
when the structure working temperature is equal to or lower than minus 20 ℃, Q235 steel and Q345 steel are qualified and guaranteed to have impact toughness of minus 20 ℃; the Q390 steel and the Q420 steel are qualified and guaranteed to have-40 ℃ impact toughness; the steel of a non-welding structure which needs to be checked and calculated for fatigue also has the qualified guarantee of normal temperature impact toughness;
when the structure working temperature is equal to or lower than-20 ℃, the Q235 steel and the Q345 steel are qualified and guaranteed to have 0 ℃ impact toughness; the Q390 steel and the Q420 steel have the qualified guarantee of 20 ℃ impact toughness.
5. The method for selecting the construction steel structure according to claim 1, wherein the method comprises the following steps: the step 3: the design standard of steel structure nodal connection, the high-rise building steel frame of seismic fortification, its nodal connection's the biggest bearing capacity should accord with following requirement:
firstly, the beam and column connection should satisfy the following formula requirements:
MU≥1.2Mp (3)
VU≥1.3(2Mp/l) (4)
in the formula, Mu-the maximum bending bearing capacity is connected based on the node with the minimum ultimate strength, and is only born by the connection of flanges;
v- - -the maximum shear bearing capacity of the node connection based on the minimum ultimate strength is borne only by the connection of the web plates; the overall plastic bending bearing capacity of the Mp-beam member;
I-Beam Net span.
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| CN202011579354.8A CN112726810A (en) | 2020-12-28 | 2020-12-28 | Method for selecting building steel structure |
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| CN202011579354.8A CN112726810A (en) | 2020-12-28 | 2020-12-28 | Method for selecting building steel structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114004436A (en) * | 2021-06-10 | 2022-02-01 | 重庆大学 | Self-reset offshore wind power booster station anti-seismic performance evaluation method based on performance response spectrum |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11229397A (en) * | 1998-02-16 | 1999-08-24 | Taisei Corp | Structure of temporary building |
| CN101440644A (en) * | 2008-12-23 | 2009-05-27 | 徐州中煤钢结构建设有限公司 | Super large span double-layer network frame dome construction technique |
| CN103422573A (en) * | 2012-12-28 | 2013-12-04 | 江河创建集团股份有限公司 | Hyperbolical variable point-supported three dimensional universal adjustable support |
| CN106193780A (en) * | 2016-07-30 | 2016-12-07 | 刘继宏 | A kind of overall installation method of segmentation highrise steel structure building |
-
2020
- 2020-12-28 CN CN202011579354.8A patent/CN112726810A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11229397A (en) * | 1998-02-16 | 1999-08-24 | Taisei Corp | Structure of temporary building |
| CN101440644A (en) * | 2008-12-23 | 2009-05-27 | 徐州中煤钢结构建设有限公司 | Super large span double-layer network frame dome construction technique |
| CN103422573A (en) * | 2012-12-28 | 2013-12-04 | 江河创建集团股份有限公司 | Hyperbolical variable point-supported three dimensional universal adjustable support |
| CN106193780A (en) * | 2016-07-30 | 2016-12-07 | 刘继宏 | A kind of overall installation method of segmentation highrise steel structure building |
Non-Patent Citations (2)
| Title |
|---|
| 全涌等: "高层建筑横风向风致响应及等效静力风荷载的分析方法", 《高层建筑横风向风致响应及等效静力风荷载的分析方法》 * |
| 葛楠: "高层建筑风振问题的研究", 《高层建筑风振问题的研究》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114004436A (en) * | 2021-06-10 | 2022-02-01 | 重庆大学 | Self-reset offshore wind power booster station anti-seismic performance evaluation method based on performance response spectrum |
| CN114004436B (en) * | 2021-06-10 | 2024-05-28 | 重庆大学 | Performance response spectrum-based earthquake resistance evaluation method for self-resetting offshore wind power booster station |
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Application publication date: 20210430 |