摘要
大跨单层网壳结构为荷载分布位置敏感性结构,雪荷载不同的分布位置对网壳结构的稳定承载力产生影响,不利的雪荷载分布可能造成网壳结构稳定承载力的大幅度降低。以单斜杆型网壳结构为例,采用组合分区和概念分析相结合的分析方法,依据网壳形态的特点分别沿纵向长度方向和跨度方向的1个网格尺寸划分8个条形区域,按照排列组合的方式分别确定雪荷载分布位置,采用弧长法确定网壳结构的稳定承载力,考察沿纵向长度方向和跨度方向雪荷载不同分布位置的敏感性。结果表明:沿纵向长度方向和跨度方向雪荷载分布时网壳结构稳定承载力的敏感性系数最大值分别为0.083和0.404;对比沿纵向长度方向和跨度方向雪荷载分布位置的敏感性系数,得到了网壳结构最敏感的雪荷载分布位置为第4至8行。
Large-span single-layer reticulated shell structure is sensitive to the load distribution. Different distribution locations of snow load have an effect on the stable bearing capacity of reticulated shell structure. The unfavorable distribution of snow load may cause the stable bearing capacity of reticulated shell to decrease greatly. In this research, a single oblique rod type reticulated shell structure is taken as an example, and the analytical method combining the combinational partitioning and concept analysis is used. According to characteristics of reticulated shells, eight stripes are divided into a lattice size in the longitudinal direction and span direction, and the snow load distribution is classified according to the permutation and combination. The stability of reticulated shell structure is determined by the arc-length method, taking into account the sensitivity of snow load in the longitudinal direction and the span direction. The results show that the maximum sensitivity coefficient of the stability of reticulated shells with snow loads is 0.083 and 0.404, respectively, along the longitudinal length and the span direction. Compared with the sensitivity coefficient of snow load distribution position along the longitudinal length direction and the span direction, the most sensitive snow load distribution position of reticulated shell structure is obtained from the 4th to 8th rows.
作者
王军林
赵淑丽
马腾飞
敦晨阳
孙建恒
WANG Junlin;ZHAO Shuli;MA Tengfei;DUN Chenyang;SUN Jianheng(College of Urban and Rural Construction, Hebei Agricultural University, Baoding 071001, China;School ofCivil Engineering, Tianjin university, Tianjin 300072, China;Department of Architectural Engineering, NorthChina Institute of Aerospace Engineering, Langfang 065000, China)
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2019年第4期138-143,共6页
Journal of Hebei Agricultural University
基金
河北农业大学理工基金重点项目(LG201713,LG201714）
河北省自然科学基金项目（E2018204019）
河北省教育厅自然科学青年基金项目（QN2018256）
关键词
柱面网壳
雪荷载
稳定承载力
分区组合
敏感性
cylindrical reticulated shells
snow load
stable bearing capacity
partition combination
sensitivity
