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建筑力学题目求解答

2025-03-15 16:47:06

推荐回答（1个）

回答1：

从左到右，三段上的轴力F分别为－50kN，－15kN，20kN。
负号表示受压，正号表示受拉。 2. 杆件伸长量公式 FL/EA， F为轴力，L是每段长度，E＝210GPa是弹性模量，A是横截面面积。数值代进去算就可以了。算出来负值表示缩短，正值表示伸长。

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