Failure Modes for Single-Layer Reticulated Domes Under Impact Loads

• Published in: Transactions of Tianjin University 2008-10, Vol.14 (B10), p.545-550
• Main Author: 范峰 王多智 支旭东 沈世钊
• Format: Article
• Language: English
• Subjects: Engineering; Humanities and Social Sciences; Mechanical Engineering; multidisciplinary; Science; 冲击负载; 塑性变形; 失效模式; 汉密尔顿变分原理; 网状圆屋顶
• ISSN: 1006-4982; 1995-8196
• DOI: 10.1007/s12209-008-0094-7

The paper presents the theory of Hamilton variation principle which is the current method for impact problem, central difference method which is efficient solution of finite element （FE） method for impact problem and adapts to solve non-linear dynamic problem. And it introduces the ANSYS/LS-DYNA which is the popular FE software for impact problem both at home and abroad. Then it gives solutions for one simple model by analytical method and ANSYS/LS-DYNA respectively to validate function of software, and they are consistent. Afterward, it gives model of singlelayer Kiewitt reticulated dome with a span of 60 m, and the cylinder impactor, and introduces the contact interface arithmetic, especially the material model of steel （piecewise linear plasticity model） which takes stain rate into account and makes steel failure stress higher under impact loads. The vertical displacement, stress in main members, and the plastic deformation for dome under impact loads were obtained. Then four failure modes （no failure, moderate failure, global failure and slight failure） were summarized according to the rules of dynamic response. And the characteristics of dynamic response for each failure mode were shown.