索拱结构布索方式研究与静力特性分析

Study of the Cable Arrangements and Analysis of Static Behavior for Cable-arch Structure

通过研究纯拱在全跨均布荷载作用下的弯矩分配,探讨弦撑式索拱、弦张式索拱、车幅式索拱的布索方式。对比索拱结构与纯拱结构静力特性,包括变形对比,内力对比,拱脚推力对比,索拱结构均在一定程度优于纯拱结构。最后对比索拱结构与纯拱结构的经济性,将拉索用量换算计入用钢量,在相近刚度水平下,索拱结构与纯拱结构相比具有较好的经济性。

By studying the bending moment distribution of pure arch under a full span load distribution, this paper investigated the cable arrangement of chord - supporting cable - arch structure, chord - tension cable - arch structure, and spoke cable - arch structure. We also compared the static characteristics of cable - arch structure and pure arch structure, including deformation contrast, internal forces contrast, and arch thrust contrast, which proved that cable - arch structure surpasses pure - arch structure in a certain degree. Finally, we compared the economic efficiency of cable -arch structure and pure arch structure. Converting the amount of cable used into the amount of steel, under a similar level of stiffness, cable arch structure proves to be more economical efficient in contrast with pure arch structure.