对新模型结构强度以及框架群合理性探究.docVIP

题 目 对新模型的结构强度以及框架群合理性的探究 关 键 词 材料强度 构件连接方式 框架截面面积 正六棱柱以及正三棱柱模型的探究 摘 要： 首先我们对框架的结构强度进行了分析，主要从材料、构件之间的连接方式以及框架的截面面积三个方面来考虑，在模型一中得到了以下一些经验公式：，，，，虽然这些公式还是有一定的局限性，但是我们大致可以根据他们计算出我们需要的混凝土的强度，可以对此进行一个对比。 在模型二中我们对构件之间的连接方式进行了一些探讨，就其中构件之间的角焊接（包括三面焊接和二面侧焊）进行了仔细的分析，得到了以下的一些经验公式：，，其中三面围焊，是指一块钢板与另一块钢板焊接时，只焊接搭接后三面的角焊缝而搭接根部的角焊缝不予焊接，所以我们认为构件之间的焊接方式是角焊接。 在模型三中我们选择了两种新的模型代替四面六边透水框架，正六棱柱底面是正六边形，站地稳，而且每个正六边形之间紧密结合，最后形成的框架群是蜂窝状，很稳定。正三棱柱也有跟正六棱柱相似的特性，我们在抛投时可以选择错开的方式，正好可以镶嵌在一起，而且三角形是最稳定的结构。我们对两个新的模型可以计算它的截面面积，然后用应力来计算他们的强度，有以下公式：。 在模型四中我们要对新的模型的可行性进行检验，选择了架空率、铺设长度、框架尺寸三个指标。 参赛队号: 2107 所选题目: A 题 Abstract First of all, we analyses the structural strength of the framework. Especially aim three aspects to consider: materials，the connections of components and the cross section area of framework. At first, we can get some empirical formulas from model 1: ,. Although these formulas have certain limitation, we can roughly calculate the strength of concrete according to them and compared them. In model 2, we make a discussion about the connections of the components. And we analyses the angle welding of the components, including three surface welding and two side welding. Then we can get the following formulas: ,. Among them, three sides welding means welding lap not root fillet welding but only three fillet welding when welding a piece of steel plate to another piece of steel plate. So we think the angle welding is the welding way of components. In model 3, we choose two kinds of new model instead of all six side frame. The bottom of six prisms is stable because it’s hexagonal. And the connection of each hexagon is closely. Finally, the group of framework is similar with honeycomb and it’s stable. Three prisms have similar features with six prisms. We can choose the stagger way, just to be set in together, and the structure of the triangle is the most stable. We can calculate the cross section area acc