摘要
对新型混凝土薄壳——球面钢-混凝土组合肋壳进行双重非线性稳定研究,考虑几何和材料双重非线性的影响,通过结构受力全过程分析,确定其极限承载力,并系统考察了分割频数、矢跨比和初始缺陷等因素对结构弹塑性稳定性能的影响,详细讨论极限荷载变化以及失稳区域的分布情况.通过大规模参数分析研究,较全面揭示了新型壳体结构的弹塑性稳定性能的规律性,得到各种情况下弹塑性极限承载力的变化趋势和结构的失稳形式,确定考虑初始缺陷影响后,极限承载力下降程度.
Dual nonlinear stability of a new kind of thin concrete shell--spherical steel-concrete ribbed shell--is analyzed, and critical loads are determined by all course tracing, considering double nonlinear geometrical and material nonlinear. A comprehensive parametric stability analysis of composite ribbed shell with various geometric parameters has been carried out. The critical loads and the unstable areas distribution are discussed thoroughly. Based on these results, the behaviors of nonlinear stability are concluded, the change trend of critical loads and instability mode under different situation are obtained, and at last the degree of critical loads decreasing is defined under initial imperfection.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2008年第4期580-584,共5页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
西安建筑科技大学人才基金(RC200801)
西安建筑科技大学青年科技基金(QN0801)
关键词
钢-混凝土组合肋壳
双重非线性稳定
极限承载力
全过程跟踪
steel-concrete composite ribbed shell
dual nonlinear stability
critical loads
all course tracing
