问：薄壁焊管，镀锌薄壁焊管的竖向承载力怎么计算呢？以上计算都是简单的计算，同时还要考虑安全系数，甚至地震载荷，具体的情况分析请有经验的专业工程师计算，以上资料仅供参考使用。
Question: How to calculate the vertical bearing capacity of thin-walled welded pipe and galvanized thin-walled welded pipe? The above calculation is simple, and safety factor, even seismic load, should be taken into account. Experienced professional engineers are required to calculate the specific situation. The above information is for reference only.
答： 1.计算压应力，就是竖向压力作用在薄壁焊管的横截面上所产生的压应力。就是压力（单位N）除以薄壁焊管横截面面积（单位m平方）。只要压应力小于材料的许用应力即可。
Answer: 1. Computational stress is the compressive stress produced by vertical pressure acting on the cross section of thin-walled welded pipe. It is the pressure (unit N) divided by the cross-sectional area (unit m square) of the thin-walled welded pipe. As long as the compressive stress is less than the allowable stress of the material. 2.薄壁焊管受压，要计算稳定性。稳定性的计算较为复杂。要看连接的方式是两端固接还是一端固接另一端铰接。估计你不只使用1跟立柱，所以可以简单计算成两端固接。临界压力简单计算：P=(4*n*Pi^2*E*I)/[(L/2)^2]。n立柱的数量，pi^2就是拍的2次方，E弹性模量，I惯性矩，L立柱长度。
2. The stability of thin-walled welded pipe under pressure should be calculated. The calculation of stability is complicated. It depends on whether the connection is fixed at both ends or hinged at the other end. It's estimated that you don't only use one post, so you can simply calculate it as a two-end fixture. Simple calculation of critical pressure: P=(4*n*Pi^2*E*I)/[(L/2)^2]. The number of n columns, PI ^ 2 is the second power of beat, E modulus of elasticity, I moment of inertia, L column length.
进入5月份后，一方面是现货市场去库存化持续，另外一方面是上游薄壁焊管厂持续的高位粗钢产量致使内部库存较大，在下调出厂价的手段下，相对以前的低价薄壁焊管资源已经陆续发往现货钢市，预计近期可能集中到市，或许将对薄壁焊管厂刚刚提起的提升钢价产生制约。
After entering May, on the one hand, the de-stocking of the spot market continues, on the other hand, the continuous high crude steel output of the upstream thin-walled welded pipe factory leads to a large internal stock. Under the means of lowering the ex-factory price, the low-cost thin-walled welded pipe resources have been sent to the spot steel market one after another. It is expected that they may be concentrated in the market in the near future, and perhaps the steel price just raised by the thin-walled welded pipe factory will be raised. Constraints arise.
