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中文摘要：
通过有限元软件ANSYS，本文计算分析了在钢拱梁轴线平面内增加适当的撑杆和预应力索而形成的新型加强型钢拱梁结构的受力性能，并且分析了改变加强型钢拱梁两侧撑杆的相对长度对改善结构受力性能所起到的优化作用，显示了两个加强型钢拱梁在不同竖向荷载作用下结构应力和位移的变化规律。结果显示两加强型钢拱梁的刚度和承载力与普通大跨度钢拱梁相比均有很大的提高，改变两侧撑杆相对长度的加强型钢拱梁与原加强型钢拱梁相比受力更加合理。
英文摘要：
By using the finite element analysis software ＂ANSYS＂, this paper analyzes mechanical behavior of a new reinforced steel arch beam-a structure where proper stay bars and prestressed cables are arranged along the axial plane of the steel arch beam, and analyzes the optimization of improving the imernal force characteristics of the structure when the relative length of two sides＇ stay bars of the reinforced steel arch beam is changed so as to show their variation regularities of stress and deformation under vertical loads. The analysis results display that stiffness and load-bearing capacity of the two reinforced steel arch beams increase greatly, and the structure which has changed the length of two sides＇ stay bars is more superior.
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