steel structure · technology Guide for selection of design software for various types of steel structures

steel structure · technology] Guide for selection of design software for various types of steel structures

1.Plane frame: pK (Architectural Research Institute) and pescad (Machinery Institute) can be selected when the plane is regular or under multi-storey. These design software are calculated by cutting two-dimensional plane frame, including static and dynamic analysis and the most unfavorable internal force combination.

  

2.Plane bent: it is limited to single story industrial workshop with multiple cranes. PK (Construction Research Institute), bent (Institute of machinery) and other programs can be selected. These programs include the most unfavorable combination of multiple cranes, multi span seismic force calculation, and internal force combination and reinforcement calculation of inclined web member and flat web member column.

  

3.Grid structure: there are more and better grid calculation programs and software with CAD drawing in China, such as mstcad (Zhejiang University), msgs (Institute of construction and Research), Naval Engineering Bureau, etc.

  

4.Foundation: there are more and better softwares used in China, such as Lizheng foundation design software, MFD software of Foundation Institute of Architectural Research Institute, tbsa-f software of structural Institute of Architectural Research Institute, etc.The calculation models of Winkler, elastic half space and layered foundation should be paid attention to when selecting, whether there is the function of foundation settlement calculation should be paid attention to, and the foundation software that should be applicable and reasonable should be selected.

  

5.High rise: there are many softwares available in China, such as thin-walled bar type TBSA (Architectural Research Institute) and Tat (Construction Research Institute), which are suitable for the structure with regular plane and slender shear wall.There are SSW (Guangdong Institute) with continuum finite element model, tus (Tsinghua University) with module element F. side column and edge beam type, SAP84 (Peking University), SATWE (Construction Research Institute) and tbsap (Construction Research Institute) of plate and shell element model. The software of plate and shell element model is applied to irregular complex high-rise buildings.Considering the rationality of high-rise structure stress analysis, the plate shell element model is better than the thin-walled bar model.

  

6.Grade crossing beam, continuous beam and floor slab: PKPM software and Lizheng Design Toolbox can be selected.

  

7. Steel structure: MTS (Tongji University) and Tat (Construction Research Institute) can be selected for multi-storey and high-rise steel structures.SAP84 (Peking University), MAS (Academy of agricultural machinery), PDSOFT (China Science and technology Fulong Co., Ltd.) can be selected for complex steel structure.Ps2000 (Metallurgy Research Institute), STS (Construction Research Institute) and 3D3S (Tongji University) can be selected for steel structure of industrial plant.The selection of steel structure design software should be considered from the function superiority of CAD drawing.

  

8.The complex structure should be analyzed by no less than two different mechanical models, and the correctness of the calculation results should be checked

  

1)The calculated axial force Ni of column and wall is basically consistent with the approximate gravity of loading area AI of column and wall: Ni = q? AI

  

Frame structure: q = 12 ~ 14KN / m2 frame shear wall structure: q = 13 ~ 15kn / m2 shear wall structure: q = 14 ~ 16kn / m2

  

2)Natural vibration period range: frame structure: T1 = (0.10 ~ 0.15) n

  

Frame shear wall structure: T1 = (0.06 ~ 0.12) n

  

Shear wall structure: T1 = (0.04 ~ 0.06) n

  

The relationship between the vibration periods: T2 = (1 / 3 ~ 1 / 5) T1

  

T3=(1/5~l/7)T1

  

N is the total number of floors in the structural calculation

  

3)Reasonable mode shape curve: T1 mode has no zero point; T2 mode has a zero point at (0.7-0.8) H; T3 mode has two zeros at (0.4-0.5) H and (0.8-0.9) h respectively.H is the total height of structure calculation.

  

4)Reasonable seismic force: the bottom shear force of the structure with normal layout is roughly within the following range:

  

V0 = (0.015-0.03) g (7 ° class II site soil)

  

V [sub] 0 [/ sub = (0.03 ~ 0.06) g (8 ° class II site soil)

  

V [sub] 0 [/ sub = (0.09 ~ 0.13) g (9 ° class II site soil)

  

V0 is the shear force at the bottom of the structure and G is the total weight of the structure.

  

5)Under the static action of internal and external force balance: ∑ Ni = g

  

Under the action of wind: ∑ VI = ∑ p

  

Ni is the axial force of bottom column and wall under static action

  

VI is the shear force of columns and walls on the ground floor under wind load

  

Σ P is the total wind load acting on the structure

  

The seismic force can not be checked because the internal force of each vibration mode is no longer equal to the total horizontal seismic force after the combination of SRSS and CQC.

  

6)Under the action of symmetrical external force, the internal force and displacement of symmetry point of symmetrical structure must be symmetrical.

  

7)For the structure with gradual change of vertical stiffness and uniform mass change, under the action of relatively uniform external force, the calculation results of internal force and displacement change uniformly from top to bottom, and there should be no sudden change phenomenon of large positive and negative, large progress.

  

8)The rational design of cross-section is more reasonable than that of normal structure, generally speaking, there should not be too many overrun sections. The basic rules are: most of the axial design values of columns and walls are pressure; most of the columns and walls are structural reinforcement; except for some wall sections, most of the shear walls meet the shear requirements of the section; and most of the beam sections meet the shear and torsion requirements.


Post time: Jul-10-2020