大跨度椭圆形索承单层网壳受力性能及影响因素分析

发布时间：2018-09-04 13:10

【摘要】：以常州体育馆屋盖120 m×80 m椭圆形索承单层网壳为背景,研究了椭圆形索承单层网壳结构布置的变化规律,发现采用较大的网格可减小整体结构的用钢量;更密的索杆布置,可显著提高结构的稳定性能;上部区域撑杆高度的增加,能提高结构的刚度与稳定性;下部区域撑杆高度的增加,能减小支座反力及杆件内力。同时探讨了影响椭圆形索承单层网壳受力性能及稳定性能的多个关键因素,通过对椭圆长短轴比值的研究,建议不宜采用长短轴比值过大的平面;通过对索预应力值的研究,提出应以长、短轴支座水平反力均较小作为确定索预应力值的原则;通过对屈曲部位的分析,提出可以通过调整杆件截面,将屈曲部位控制在预定区域,从而用较少的材料取得较大的稳定承载力。
[Abstract]:On the background of 120 m 脳 80 m elliptical cable-supported single-layer latticed shell of Changzhou Gymnasium, the variation law of the arrangement of elliptical cable-supported single-layer latticed shell structure is studied. It is found that using larger mesh can reduce the steel consumption of the whole structure, and make the arrangement of cable rod more dense. The stability of the structure can be improved significantly, the stiffness and stability of the structure can be improved by the increase of the height of the brace in the upper part, and the reaction force of the bearing and the internal force of the member can be reduced by the increase of the height of the brace in the lower part. At the same time, several key factors affecting the mechanical performance and stability performance of elliptical cable-supported single-layer latticed shell are discussed. Through the study of the ratio of the elliptical long-long axis, it is suggested that the plane with excessive ratio of long-axis and long-axis should not be used, and the value of cable prestress should be studied. It is put forward that the horizontal reaction force of long and short bearing should be small as the principle of determining cable prestress value, and through the analysis of buckling position, it is suggested that the buckling position can be controlled in a predetermined area by adjusting the section of the member. Thus, the stable bearing capacity can be obtained by using less materials.
【作者单位】：中国建筑西南设计研究院有限公司;
【分类号】：TU399

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