圆弧形与抛物形拱结构的力学性能对比
发布时间：2019-03-01 14:21
【摘要】：针对圆弧形拱结构和抛物形拱结构的力学特性进行比较研究,基于结构力学的弹性中心法,分别得到无铰圆弧形和无铰抛物形拱结构在法向均布荷载下的内力及应力计算式,进而给出了不同矢跨比和厚跨比下两种拱结构的弯矩、轴力对比图,认为抛物形拱端的弯矩比圆弧形拱拱端的弯矩更集中,特别当水平拱圈的矢跨比较大时,抛物形拱拱端外侧易出现较大的拉应力,并对无铰圆弧形拱、无铰抛物形拱抗屈曲特性进行了比较分析,分别给出两种无铰拱结构的临界屈曲荷载解析计算式,认为在相同矢跨比下,抛物形拱的抗屈曲性能稍优于圆弧形拱,为工程设计人员应用提供参考。
[Abstract]:In order to study the mechanical properties of the arc-shaped arch structure and the parabolic arch structure, the internal force and the stress calculation formula of the non-hinged circular arc and the non-hinged parabolic arch structure under the normal uniform load are respectively obtained based on the elastic center method of the structural mechanics. Furthermore, the bending moment and axial force comparison of the two arch structures with different vector-span ratio and thick-span ratio are given, and the bending moment of the parabolic arch end is considered to be more concentrated than the bending moment of the arc-shaped arch end, especially when the sagittal cross-span of the horizontal arch ring is large, the outer side of the arch end of the parabolic arch easily has a large tensile stress, The buckling characteristics of the non-hinged arch and the non-hinged parabolic arch are compared and analyzed, and the critical buckling load analysis and calculation formulas of the two non-hinged arch structures are respectively given, and the buckling performance of the parabolic arch is better than the arc-shaped arch under the same vector-span ratio. Provide reference for engineering design personnel application.
【作者单位】： 浙江省水利水电勘测设计院;
【基金】：浙江省水利水电勘测设计院科标业项目(B1608,B1609)
【分类号】：TV31
本文编号：2432505
[Abstract]:In order to study the mechanical properties of the arc-shaped arch structure and the parabolic arch structure, the internal force and the stress calculation formula of the non-hinged circular arc and the non-hinged parabolic arch structure under the normal uniform load are respectively obtained based on the elastic center method of the structural mechanics. Furthermore, the bending moment and axial force comparison of the two arch structures with different vector-span ratio and thick-span ratio are given, and the bending moment of the parabolic arch end is considered to be more concentrated than the bending moment of the arc-shaped arch end, especially when the sagittal cross-span of the horizontal arch ring is large, the outer side of the arch end of the parabolic arch easily has a large tensile stress, The buckling characteristics of the non-hinged arch and the non-hinged parabolic arch are compared and analyzed, and the critical buckling load analysis and calculation formulas of the two non-hinged arch structures are respectively given, and the buckling performance of the parabolic arch is better than the arc-shaped arch under the same vector-span ratio. Provide reference for engineering design personnel application.
【作者单位】： 浙江省水利水电勘测设计院;
【基金】：浙江省水利水电勘测设计院科标业项目(B1608,B1609)
【分类号】：TV31
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