preflex composite beam的用法和样例：
例句
- Nonlinear analysis method on the mechanical behavior of preflex composite beams was established with the nonlinear stress-strain curves of materials.
摘要采用材料非线性本构关系研究预弯组合梁的受力行为，建立预弯组合梁从预弯钢梁加荷到结构破坏的非线性全过程分析方法。 - More than ten preflex composite beam bridges were designed and analyzed with this method, and excellent results were obtained.
利用该方法已完成了十余座预弯组合梁桥的设计分析，取得了良好的计算结果。
