阅读说明：本技术 一种应用于工业厂房设计的抽柱门式刚架体系及设计方法 (Column-drawing portal rigid frame system applied to industrial factory building design and design method ) 是由 王红军 李治 黎玲 于 2020-05-23 设计创作，主要内容包括：本发明涉及一种应用于工业厂房设计的抽柱门式刚架体系,包括门式刚架横梁和支承门式刚架横梁的多排钢柱,一榀门式刚架横梁和一排钢柱组成一榀门式刚架；所述门式刚架横梁包括标准榀门式刚架横梁和抽柱门式刚架横梁,在抽柱门式刚架横梁的抽柱位置设有支承抽柱门式刚架横梁的托梁,托梁垂直于抽柱门式刚架横梁,托梁的两端分别支承于位于抽柱门式刚架横梁两侧的两榀门式刚架的钢柱上。该抽柱门式刚架体系的设计方法是,通过抽柱门式刚架计算模型和托梁计算模型之间的相关性进行迭代计算,在达到误差允许范围终止计算,就可以得到抽柱门式刚架和托梁的内力。既能保证主体结构安全,也能根据准确构件内力优化截面,节约造价。(The invention relates to a column-drawing portal rigid frame system applied to industrial factory building design, which comprises a portal rigid frame beam and a plurality of rows of steel columns for supporting the portal rigid frame beam, wherein a portal rigid frame beam and a row of steel columns form a portal rigid frame; the portal rigid frame beam comprises a standard portal rigid frame beam and a column-drawing portal rigid frame beam, a supporting beam for supporting the column-drawing portal rigid frame beam is arranged at the column-drawing position of the column-drawing portal rigid frame beam, the supporting beam is perpendicular to the column-drawing portal rigid frame beam, and two ends of the supporting beam are respectively supported on steel columns of two portal rigid frames positioned on two sides of the column-drawing portal rigid frame beam. The design method of the column-drawing portal rigid frame system comprises the steps of carrying out iterative computation through correlation between a column-drawing portal rigid frame computation model and a joist computation model, and terminating computation when an error allowable range is reached so as to obtain internal force of the column-drawing portal rigid frame and a joist. The safety of the main body structure can be guaranteed, the cross section can be optimized according to the internal force of the accurate component, and the manufacturing cost is saved.)

1. The utility model provides a be applied to column drawing portal rigid frame system of industry factory building design which characterized in that: the portal rigid frame comprises a portal rigid frame beam and a plurality of rows of steel columns for supporting the portal rigid frame beam, wherein a portal rigid frame beam and a row of steel columns form a portal rigid frame; the portal rigid frame beam comprises a standard portal rigid frame beam and a column-drawing portal rigid frame beam, a supporting beam for supporting the column-drawing portal rigid frame beam is arranged at the column-drawing position of the column-drawing portal rigid frame beam, the supporting beam is perpendicular to the column-drawing portal rigid frame beam, and two ends of the supporting beam are respectively supported on steel columns of two portal rigid frames positioned on two sides of the column-drawing portal rigid frame beam.

2. The column-pulling portal rigid frame system applied to industrial factory building design according to claim 1, wherein: two ends of the joist are respectively supported on the top ends of the steel columns of the two portal rigid frames adjacent to the position of the extraction column.

3. The column-pulling portal rigid frame system applied to industrial factory building design according to claim 2, wherein: one end of the joist is hinged with the steel column of one portal rigid frame, and the other end of the joist is hinged with the steel column of the other portal rigid frame.

4. A method for designing a sliding column portal rigid frame system for industrial factory building design according to claim 1, 2 or 3, comprising the steps of: 1) iterative calculation is carried out through the correlation between the column-drawing portal rigid frame calculation model and the joist calculation model, and the calculation is terminated when the error allowable range is reached, so that the internal force of the column-drawing portal rigid frame and the joist can be obtained; 2) obtaining the stress ratio of the column drawing portal rigid frame and the joist according to the internal force and the preset section of the column drawing portal rigid frame and the joist; 3) the reasonable and economic section sizes of the column drawing portal rigid frame and the joist are determined by controlling the stress ratio to optimize the sections of the column drawing portal rigid frame and the joist.

5. The design method according to claim 4, wherein: the iterative computation in the step 1) comprises the steps of (1) taking out a column portal rigid frame computation model in a multi-span mode, supporting a roof rigid frame beam by a joist at the column taking-out position, replacing the joist by a fixed elastic support in the computation model, and (2) computing the reaction force R of the fixed elastic support by using the existing structure computation software on the assumption that the rigidity value K of the elastic support is infinite₁(ii) a (3) According to F₁=R₁Calculating the deformation delta of the joist at the position of the column by using the joist calculation model and the simply supported beam₁，F₁Is the load of the joist calculation model; (4) by K₁=F₁/Δ₁Calculating to obtain K₁Value according to K obtained₁Substituting the values into the calculation software in the step (2) to calculate the reaction force R of the fixed elastic support₂(ii) a (5) Repeating the steps (3) and (4) to carry out iterative calculation until K is obtained_i+1When satisfying | K_i-K_i+1|/K_i<And when the concentration is 5 percent, stopping the calculation, wherein i is a natural number larger than 0.

6. The design method according to claim 4 or 5, wherein: the stress ratio of the beam is not more than 0.95, the stress ratio of the rigid frame column is not more than 0.85, the stress ratio of the joist is not more than 0.80, and the deflection meets the standard requirement.

Technical Field

The invention belongs to the field of building structures, and particularly relates to a column-drawing portal rigid frame system applied to industrial factory building design.

Background

At present, most industrial plants are light portal rigid frame buildings, and column drawing design is often needed due to process requirements. For example, a steel structure factory building of a certain prefabricated part production workshop is structurally in the form of a portal rigid frame, the span of the rigid frame along a longitudinal standard column is 7.0m, the span in the transverse direction is 4, the length is 120m, the span in the longitudinal direction is 25 m, and the length is 175m, because a column net in the middle needs to reach 12.0m along the longitudinal direction according to the production process requirements, one rigid frame column needs to be cancelled, the beam span of the portal rigid frame can reach 60m, which is doubled compared with the standard beam span of 30m, the beam span is calculated by adopting a conventional portal rigid frame system, the cross sections of the beam and the steel column of the rigid frame are increased greatly, which is not beneficial to construction and installation, in addition, the deflection of the beam of the rigid frame with 60m span is close to the deflection of the beam of the portal rigid frame with 30m span, which keeps the flat roof of the rigid frame, the deflection is controlled to be higher, the manufacturing cost is greatly increased, and the phenomenon of the column-drawing portal frame is common in industrial plants. The invention makes the calculated span of the beam of the column-drawing portal rigid frame be the same as the calculated span of the beams of other standard trusses by a reasonable structural arrangement scheme, so that the section of the rigid frame is the same as or close to that of the standard trusses, and the internal force of the column-drawing portal rigid frame can be accurately calculated by a simple and applicable calculation principle, thereby not only ensuring the safety of a main body structure, but also optimizing the section of a component and saving the manufacturing cost.

Disclosure of Invention

The invention provides a column-drawing portal rigid frame system and a design method, which are applied to industrial factory building design, and aims to overcome the defects that the calculated span of a portal rigid frame beam is increased and the sections of a steel column and the beam are excessively increased due to column drawing.

The invention adopts the following technical scheme: a column-drawing portal rigid frame system applied to industrial factory building design comprises a portal rigid frame beam and a plurality of rows of steel columns for supporting the portal rigid frame beam, wherein a portal rigid frame is formed by a portal rigid frame beam and a row of steel columns; the portal rigid frame beam comprises a standard portal rigid frame beam and a column-drawing portal rigid frame beam, a supporting beam for supporting the column-drawing portal rigid frame beam is arranged at the column-drawing position of the column-drawing portal rigid frame beam, the supporting beam is perpendicular to the column-drawing portal rigid frame beam, and two ends of the supporting beam are respectively supported on steel columns of two portal rigid frames positioned on two sides of the column-drawing portal rigid frame beam.

And two ends of the joist are respectively supported on the top ends of the two portal rigid frames adjacent to the column drawing position. Namely, the steel columns at the two ends of the supporting joist are adjacent to the column drawing position and are positioned in the direction vertical to the beam of the column drawing portal rigid frame.

One end of the joist is hinged with the steel column of one portal rigid frame, and the other end of the joist is hinged with the steel column of the other portal rigid frame.

The invention also provides a design method of the column drawing portal rigid frame system applied to industrial factory building design, which comprises the following steps: 1) iterative calculation is carried out through the correlation between the column-drawing portal rigid frame calculation model and the joist calculation model, and the calculation is terminated when the error allowable range is reached, so that the internal force of the column-drawing rigid frame and the joist can be obtained; 2) obtaining the stress ratio of the column drawing portal rigid frame and the joist according to the internal force and the preset section of the column drawing portal rigid frame and the joist; 3) the reasonable and economic section sizes of the column drawing portal rigid frame and the joist are determined by controlling the stress ratio to optimize the sections of the column drawing portal rigid frame and the joist.

The iterative computation in the step 1) comprises the steps of (1) taking out a column portal rigid frame computation model in a multi-span mode, supporting a roof rigid frame beam by a joist at the column taking-out position, replacing the joist by a fixed elastic support in the computation model, and (2) utilizing the existing computation software, assuming that the rigidity value K of the elastic support is infinite, and computing the reaction force R of the fixed elastic support₁(ii) a (3) According to F₁=R₁Calculating the deformation delta of the joist at the position of the column by using the joist calculation model and the simply supported beam₁，F₁Is the load of the joist calculation model; (4) by K₁=F₁/Δ₁Calculating to obtain K₁Value according to K obtained₁Substituting the values into the calculation software in the step (2) to calculate the reaction force R of the fixed elastic support₂(ii) a (5) Repeating the steps (3) and (4),performing iterative calculation until K is obtained_i+1When satisfying | K_i-K_i+1|/K_i<And when the concentration is 5 percent, stopping the calculation, wherein i is a natural number larger than 0.

The stress ratio of the beam is not more than 0.95, the stress ratio of the rigid frame column is not more than 0.85, the stress ratio of the joist is not more than 0.80, and the deflection meets the standard requirement.

The calculation model of the column-drawing portal rigid frame consists of a steel column and a rigid frame beam, and a fixed elastic support is arranged at the position of a column to be drawn. The joist calculation model consists of a longitudinal steel column for supporting the joist and the joist, the joist is hinged with a connecting node of the steel column, the length of the steel column is taken according to the actual value, and the support is a fixed rigid support. The counter force of the elastic support fixed at the column drawing position in the column drawing portal rigid frame calculation model is used as a concentrated load to act on the joist calculation model, the load position is the position of a joist supporting rigid frame beam, the displacement of the position is calculated, the rigidity value is calculated according to K = F/delta, the K value is substituted into the rigidity of the elastic support fixed in the column drawing portal rigid frame calculation model, the support counter force under the K value is calculated, the counter force is substituted into the joist calculation model, repeated iterative calculation is carried out, and when the absolute value of K is greater than the threshold, the absolute value of K is used as the counter force_i-K_i+1|/K_i<And 5%, the iterative calculation can be terminated, and the internal forces of the rigid frame and the joist of the column-drawing rigid frame system can be obtained through two calculation models.

The invention has the advantages that: the structural arrangement scheme of the system adopts a structural arrangement scheme that the joist replaces a drawn rigid frame column to support a rigid frame beam, and provides a calculation principle of iterative calculation through correlation between a column-drawing portal rigid frame and a joist calculation model, so that the internal force of the rigid frame and the joist can be accurately calculated, the calculation span of the portal rigid frame beam increased due to column drawing is reduced, the section of the column-drawing portal rigid frame is close to or identical with the section of other standard trusses, the calculation process related to the provided calculation principle can be completed through a calculation program, and the calculation simplified diagram force transmission system is simple. The invention solves the problem that the cross section of the rigid frame is excessively enlarged due to the large calculation span of the beam of the rigid frame caused by the column drawing condition of the column drawing portal rigid frame, and the provided calculation principle can accurately calculate the internal force of the column drawing rigid frame and the joist, thereby ensuring the safety of the main body structure and saving the manufacturing cost.

Drawings

FIG. 1 is a schematic structural view of the present invention.

Fig. 2 is a simplified diagram of a calculation model of a column-drawing portal rigid frame.

FIG. 3 is a schematic view of a joist calculation model according to the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in the attached figure 1, the invention comprises a portal rigid frame beam and a plurality of rows of steel columns GZ for supporting the portal rigid frame beam, wherein a portal rigid frame beam and a row of steel columns form a portal rigid frame; the portal rigid frame beam comprises a standard portal rigid frame beam GJL1 and a post-drawing portal rigid frame beam GJL2, a support beam GTL for supporting the post-drawing portal rigid frame beam is arranged at a post-drawing position A of the post-drawing portal rigid frame beam, the support beam is perpendicular to the post-drawing portal rigid frame beam, and two ends of the support beam are respectively supported on the tops of two adjacent portal rigid frames at two sides of the post-drawing portal rigid frame beam and at the post-drawing position. As shown in the attached drawings 2-3, a support 1 is a fixed rigid support, a support 2 in fig. 2 is a fixed elastic support, R is a support counter force of the support 2, and K is the rigidity of the support 2; in fig. 3, F is the concentrated load acting on the joist, the value of the concentrated load is the same as that of R, the acting point is the position of the joist supporting the rigid frame beam, Δ is the displacement of the concentrated force position of the joist under the action of F, and the node B represents the connection mode of the joist and the steel column and is hinged. The specific implementation steps are as follows: (1) according to the production process requirements, arranging a structural arrangement scheme schematic diagram of a column-drawing portal rigid frame system according to the actual column-drawing situation; (2) establishing calculation diagrams of two calculation models shown in the figures 2-3 according to the figure 1; (3) according to the calculation diagram of fig. 2, assuming that the K value is infinite, that is, the support is a fixed rigid support, and calculating the R value by using calculation software (such as structure common calculation software YJK, PKPM, 3D3S, etc.); (4) calculating a value of delta according to the calculation diagram shown in figure 3 and F = R; (5) calculating K = F/delta, substituting the K value into the calculation diagram shown in FIG. 2, and calculating the R value; (6) repeating the steps (4) and (5) to perform iterative calculation, and if the | K is satisfied_i-K_i+1|/K_i<At 5%, the calculation was terminated. (7)And optimizing the section of the column-drawing portal rigid frame member according to the calculation result.

The internal forces of the column-drawing portal rigid frame and the cross beam are accurately calculated, the stress ratio of the member can be directly read by software, the cross section of the member is optimized by controlling the stress ratio, the cross beam is generally controlled to be not more than 0.95, the rigid frame column is not more than 0.85, the stress ratio of the joist is not more than 0.80, meanwhile, the deflection meets the standard requirement, and when the internal force is less than the stress ratio, the cross section can be reduced, so that the member cross section is more economical.