根据正交拱涵和斜交拱涵的工后开裂情况，对无铰拱涵裂纹产生的原因进一步分析并提出预防措施。
By cracks of square and oblique arch culverts after completion, the paper further analyzes the reasons for crack of non-articulated arch culvert, proposes the preventing measures.
通过无铰拱、双铰拱、三铰拱的体系对比分析，讨论分析了拱自身连接条件对结构受力形态的影响；
Through comparative study of hingeless arch bridge , two-hinged arch bridge and three-hinged arch bridge, the influence of connection condition of arch on mechanical condition is discussed.
试验证明该理论可行并能用于研究无铰旋翼结构参数对桨叶气弹稳定性的影响，也能用于直升机旋翼的型号设计。
The experimental results verify that the feasible theory can be used to investigate the effects of structural parameters of hingeless rotor on aeroelastic stability.
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