摘要
本文结合工程详细地论述了成拱条件及拱体受力机制．指出：加深对成拱效应的理解，有助于理解应力在土木工程中的分布情况，提高我们的理论与设计水平．
Being combined with the civil engineering,the arch conditions and principle of the load-bearing arch are detailed.It is pointed out that better understanding of the arch effect will help us to comprehend the stress distribution and to raise the theory and design level in civil engineering.
关键词
拱体
成拱效应
刚度
Arched-body
Arch effect
Rigidity
