foot length

This paper makes analysis of one disputable clause in the Technical Specification for High-rise Building with Concrete Structure——the unbraced length of the hoop reinforcement should be no longer than 300mm,and it also gives a reasonable explanation.

文章对《高层建筑混凝土结构技术规程》(JG J3-2002)中的一个有争议的条文(箍筋的无支长度不应大于300m m)进行了分析,并给出了一个较合理答案。

The supporting length of wheel pressure load along beam span direction is the contact zone width of crane wheel with track,the contact problem of crane wheel with track is very close to plane stress problem.

吊车轮压荷载沿吊车梁跨度方向的支承长度就是吊车车轮与轨道的接触面宽度 ,吊车车轮与轨道的接触问题更接近平面应力问题。