位移法计算中一些问题的剖析

Problems in Calculation With Displacement Method

用位移法计算超静定刚架时,为了使计算快捷、准确,可根据结构中杆件内力的静定性少设基本未知量。根据各杆受力和变形的特点,正确判定杆件的约束形式。

When we calculate the indeterminate rigid frame with displacement method, according to statically determinate property of the bars in the structures, we can select less unknown quantity so as tocalculate easily and exactly. On the basis of the characteristcs of the bearing and deformation of the bars, we can define the restraint form of the bars correctly.