Research Initiation Award: Energy Based Damage Model and Procedure for Safety Analysis of Structural Systems In Steel Buildings

研究启动奖：基于能量的损伤模型和钢结构系统安全分析程序

• 批准号: 9010208
• 负责人: Iqbal Singh Sohal
• 金额: $ 6万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9010208&HistoricalAwards=false
• 关键词: Research; Initiation; Award; Energy; Based

Most engineering structures are being designed to carry specified service or normal loads. However, recent developments in computer technology have created a potential for design of structures against the loads expected during the whole cycle of their life. The structures designed by using this approach will have improved durability, maintainability and damageability. Herein, an energy based damage model will be developed for computation of residual strength and stiffness of damaged steel structural members. The residual strength computations will utilize yield, limit and failure surfaces of the member which will be defined in terms of generalized forces for steel structural members. For safety evaluation of structural systems, a damage analysis computer code is to be developed. For increasing the efficiency of the safety analysis procedure, a stiffness matrix will be derived for the damaged member by employing a deflected shape which varies with increasing deformations. The safety of structural systems will be evaluated by utilizing a procedure developed by modifying the existing reliability technique. The whole procedure of determining probabilities of damage and failure of structural systems will be automated. The above developments will be validated by comparisons with existing experimental and analytical results. The developed damage model and safety analysis algorithm will aid in design of structural systems based on desired probability of damage and failure. They will also aid in design of steel structural systems which, under the extreme loads, will avoid concentration of damage and premature failure.

大多数工程结构的设计都是为了承载特定的 服务或正常负载。 然而，计算机的最新发展 技术为结构设计创造了潜力 在其整个寿命周期内的预期载荷。 通过这种方法设计的结构将得到改善 耐久性、可维护性和可损坏性。 在此，能量 基于损伤模型，将开发用于计算剩余 受损钢结构构件的强度和刚度。 的 剩余强度计算将利用屈服、极限和 构件的破坏面，将根据 钢结构构件的广义力。 出于安全 结构系统的评估，一个损伤分析计算机代码 有待开发。 为了提高安全的效率， 分析过程中，刚度矩阵将推导出的 通过采用随时间变化的偏转形状， 增加变形。 结构系统的安全性将 通过使用通过修改 现有可靠性技术。 确定的整个过程 结构系统损坏和失效的概率将是 自动的 上述发展将通过比较得到验证 现有的实验和分析结果。 发达 损伤模型和安全分析算法将有助于设计 基于期望的损伤概率的结构系统， 失败 他们还将协助钢结构系统的设计 在极端载荷下，避免损伤集中 过早的失败。