学报6卷1期刊載王启焯同志的論文[1],是篇有价值的文章,因为指出結构設計中的矛盾,俾使实际工作中,能进一步节約国家的建設资金。对王同志所提出的普遍規律,我作一点补充。 結构是否充分利用材料,以主应力迹綫(以后簡称迹线)来刻划是有益的。将迹綫想象为力流,在凸角处形成死水区(无力流);因此,构件的截面形状,給迹綫足够的順滑,是合理的。如受扭构 The paper [1] contained in Comrade Wang Qichen’s paper [1] is a valuable article because it points out the contradiction in structural design and enables the actual work to further save the nation’s construction funds. I would like to add a little more to the general laws proposed by Comrade Wang. Whether the structure makes full use of the material, it is beneficial to characterize the main stress trace (hereinafter referred to as the trace). Think of the traces as a force flow that forms a dead-water zone (no flow) at the lobes; therefore, the cross-sectional shape of the member is sufficient to give the traces sufficient smoothness, which is reasonable. Twisted