ATTEN: Manager Liu
ADD: Longhua Development Zone, Jing County, Hengshui City, Hebei Province
It can be seen that when the wind suction plays a major role in controlling, it is more economical to set up double-layer stretching bar than to increase the cut-off bar. It should be pointed out that if the roof slab can stop the lateral instability of the upper flange of purlin, pull bars can be set only under purlin. The design result is the same as that of double-layer pull bars. The design principle of 2.2.1 wall beam is similar to that of roof purlin, and the restraint effect of wall plate and pull bars should also be considered. The difference is that the wallboard has self-bearing and non-self-bearing, which should be analyzed according to the specific situation. In addition, the influence of double bending moment B should be considered in the design of wall beams according to the different construction conditions. 2.1.2 According to the Technical Specification for Cold Ligusticum Ligusticum Thin-walled Steel-Bonded Tussles and the inscriptions on edifices, the wall beams with wall panels on both sides and wall beams with side-hanging panels and pull rods on the other side can prevent their torsional deformation, regardless of the influence of bending and torsional twin moments (B=0), the strength of wall beams can be calculated only at this time. Therefore, for non-self-bearing wallboard, bilateral tension bars should be set inside and outside purlin, and for self-bearing wallboard, tension bars can only be set inside.
For the stability design of Neixi Green under wind suction, similar to the roof purlin, the wallboard is generally made up of self-tapping mule nails and purlin. It can be considered that the wallboard can prevent the lateral instability of the lonely edge of the wall beam. Similarly, for example, the column spacing of a light steel workshop is 6m, the purlin spacing of the edge zone is 1.5m, the steel Q235, the basic wind pressure is 0.55KN/m2, and the wind pressure height variation coefficient is 1.14. Two pull bars are set up. After calculation, the cross section is controlled by wind suction. Table 2 of the calculation results of the lower flange of the purlin shows that: (calculated by KPM STS2008 edition of China Academy of Architectural Sciences) It can be seen that the pull bars are set on the wall beams. For non-self-bearing wallboard, bilateral tension bars should be installed inside and outside the wallboard, and the lateral tension bars can be used as the vertical fulcrum of the wallboard under the action of self-weight. Cable-stayed bars and straight braces should be set at the top of the wall panels and the wall beams under the windows to transmit the tension to the rigid frame column or the wall strut column. The bottom wall beams are fixed on the wall stack or the low wall. The overall stability is guaranteed, so there are no cable-stayed bars and straight braces at the bottom wall beams.
3. ConclusionIn the design of lightweight steel-bonded truss enclosure system, attention should be paid to the effect of truss construction measures on improving structural stability. Reasonable structural design measures should be selected according to the shape of coloured steel plate and connection mode. If stability plays a controlling role in component design, the stability of truss should be solved by structural means first, rather than blindly enlarging the section or section of component. Improving steel grade and other means to reduce this price in order to achieve better economic benefits Reference 1. Standard of China Construction Standardization Association. Technical Specification for Steel Structure of Portal Frame Light Building CECS102:2002 Beijing: China Planning Publishing House, 2003  Yongjia Standard Technical Specification for Cold-formed Thin-walled Steel Structures GB50018-2002 Beijing: China Design Planning Publishing House, 20023] Wang Yijun et al. Steel Structure Design Manual (3rd edition) Beijing China Construction Industry Publishing House, 2002 download attachment Click to download "Welcome to excerpt! Reprint must indicate the building steel structure network of Zhongyuan Building Metal Junction Association (www.CCMSA.om.C). Thank you for your cooperation.