当应力超过比例极限后，采用了有效模量值。
In the theoreitical analysis, the effective modulus E was used for the stresses which exceed the proportional limit.
通过两个大比例模型试验，研究了单拱面预应力混凝土系杆拱桥面内、面外稳定极限承载力及其影响因素。
Through two great model tests, this paper investigates the ultimate bearing capacity and its influence factor of the inside and outside face of prestressed concrete tied arch bridge with single arch.
工程上很多结构如钢筋混凝土结构、应力超过比例极限后的钢结构，都具有非线性特性。
Most of engineering structures such as reinforced concrete structures, steel structures in which some stresses are beyond elastic limit, are possessed of nonlinear characteristics.
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