NOTIONAL LOAD ON BOTTOM FLANGE IN STRENGTH CALCULATION OF Z- SHAPED CROSS SECTION PURLIN

Tong Genshu; Wu Qiang

doi:10.13204/j.gyjz201204028

Volume 42 Issue 4

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Tong Genshu, Wu Qiang. NOTIONAL LOAD ON BOTTOM FLANGE IN STRENGTH CALCULATION OF Z- SHAPED CROSS SECTION PURLIN[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(4): 136-142. doi: 10.13204/j.gyjz201204028

Citation:

Tong Genshu, Wu Qiang. NOTIONAL LOAD ON BOTTOM FLANGE IN STRENGTH CALCULATION OF Z- SHAPED CROSS SECTION PURLIN[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(4): 136-142. doi: 10.13204/j.gyjz201204028

Tong Genshu, Wu Qiang. NOTIONAL LOAD ON BOTTOM FLANGE IN STRENGTH CALCULATION OF Z- SHAPED CROSS SECTION PURLIN[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(4): 136-142. doi: 10.13204/j.gyjz201204028

Citation:

Tong Genshu, Wu Qiang. NOTIONAL LOAD ON BOTTOM FLANGE IN STRENGTH CALCULATION OF Z- SHAPED CROSS SECTION PURLIN[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(4): 136-142. doi: 10.13204/j.gyjz201204028

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NOTIONAL LOAD ON BOTTOM FLANGE IN STRENGTH CALCULATION OF Z- SHAPED CROSS SECTION PURLIN

doi: 10.13204/j.gyjz201204028

1.
Department of Civil Engineering,Zhejiang University,Hangzhou 310058,China

Received Date: 2011-10-20
Publish Date: 2012-04-20

Abstract

Abstract

Lateral displacement of the top flange of purlins is prevented by self-drilled screw connections between roof sheet and purlin. Such connected cold-formed Z-shaped cross section purlins,with no anti-sag bars,was analyzed for stress and deformation under the suction effect of wind,using the theory of thin-walled bars. The results are found to be in excellent agreement with results of ANSYS shell element calculations and the method in EC3. Further analysis revealed that the horizontal notional load at the bottom flange introduced in EC3' s approach,consists of two parts:1) one is to replace the torque generated by load not passing through the shear center,2)the other is to offset the horizontal moment caused by the simplified calculation of stress around parallel axis.
- purlin,
- stress,
- torsion,
- notional load,
- strength

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References(5)

References

Eurocode3: Design of Steel Structures-Part1- 3[S].Brussels:BSI，2006.

[2] 童根树.钢结构的平面外稳定[M].北京:中国建筑工业出版社，2007.

[3] Teoman Pekoz，Parviz Soroushian.Behavior of C-and Z-Purlins Under Wind Uplift[C]∥Sixth International Speciality Conferenceon Cold-Formed Steel Structures.St.Louis:1982.

[4] Lucas R M，A1-Bermani F G A，Kitipornchai S.Modelling of Cold-Formed Purlin-Sheeting Systems-Part 2.Simplified Model[J].Thin-Walled Structures，1997，27(4): 263-286.

[5] CECS 102∶ 2002 轻型门式刚架房屋钢结构技术规程 [S].

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