现时,不少塑料大棚的拱架采用冷弯成形的方法,但是这一加工工艺却导致拱架强度发生严重的畸形:在拱架承受负弯矩的截面上,强度过分安全;而在其承受正弯矩的截面上,强度则严重不足。为纠正上述弊病,本文提出一个可行的方法——应变时效处理,此法的优点是花费不多且简单易行。 At present, the arches of many plastic greenhouses adopt the method of cold-formed forming. However, this processing process has caused severe distortion of the strength of the arches: in the cross-section of the arches subjected to negative bending moment, the strength is excessively safe; In the section of the positive moment, the strength is severely insufficient. In order to correct these ills, this paper proposes a feasible method—strain aging treatment. The advantage of this method is that it is inexpensive and easy to implement.