[提要]  运用由梁单元、杆单元及索单元组成的混合有限元法对索支承门式刚架结构进行参数分析，从而明
确了撑杆数目、撑杆截面面积、钢索预应力、钢索面积、钢索垂跨比等因素对这种结构力学性能的影响，得出了一些有用的结论，供工程设计时参考。
[关键词]  索支承门式刚架  预应力钢结构  撑杆  钢索

The cable-strut portal frame is modeled by beam, truss and cable element. To make clear the influence of such factors as strut number, strut section area, prestress in cable, cable section area and the deflection to span ratio of cable on the load-carrying behavior of this kind of structure, parameter analysis is carried out with a mixed finite element program, from which some useful conclusions are drawn.
Keywords:  cable-strut portal frame; prestressed steel structure; strut;steel cable

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