但是，由于整个结构是超静定的，计算困难。
However, As the whole structure is hyperstatic, it is very difficult to calculate the results.
对于位移量要求较严，附加内力要求小的超静定的连续梁不宜采用。
For the continuous beam that displacement and the additional internal force should be strictly controlled should not be used.
桁架拱结构是一个高次超静定的复杂三维结构，构件的功能函数没有明确表达式。
The truss arch structure is a three-dimensional higher statically indeterminate structure, and no definite expression of the performance function can be given for its unbelievable complexity.
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