|
| |
基于冗余度与易损性的结构抗震能力提升方法研究 |
A method for the enhancement structural seismic capability based on redundancy and vulnerability |
投稿时间:2020-07-30 修订日期:2020-12-28 |
DOI: |
中文关键词: 抗震性能 应变能 冗余度 易损性 杆系结构 |
英文关键词:seismic performance strain energy redundancy vulnerability skeletal structure |
基金项目:国家自然科学基金;国家自然科学基金项目(面上项目,重点项目,重大项目) |
|
摘要点击次数: 21 |
全文下载次数: 0 |
中文摘要: |
为提升结构整体性能和抗震性能,基于结构构件应变能对材料弹性模量的敏感性及其失效后结构应变能变化量,提出了结构易损性、冗余度评价指标以衡量在地震作用下构件发生破坏的容易程度及其失效后对结构整体性能的影响。考虑地震作用下结构构件冗余度及易损性差异,通过加强“低冗余—高易损”构件,同时削弱“高冗余—低易损”构件,合理调整各类构件截面面积。结果表明,构件的冗余度和易损性可以准确反映地震作用下结构构件的重要性及发生破坏容易程度,考虑构件冗余度及易损性差异,调整结构构件面积,可有效提升结构的整体性能及抗震性能。 |
英文摘要: |
To improve the overall performance and seismic performance of the structure, and to reveal the fragility of structural member and its failure effort on the structural overall performance under earthquake action, two evaluation indexes were established to measure the vulnerability and redundancy of structural member based on the sensitivity of strain energy of member to material elastic modulus, as well as the changes in the structural strain energy after being damaged. Then the differences in redundancy and vulnerability of structural members was considered, and the member with high vulnerability and low redundancy were strengthened, the ones with low vulnerability and high redundancy were weakened by adjusting the section area of member. The results show that the redundancy and vulnerability of structural member can reflect the fragility and the influence of its failure on the structure overall performance correctly. By adjusting the member section area according to the differences in redundancy and vulnerability of structural members, and the overall performance and seismic performance of the structure can be enhanced effectively. |
查看/发表评论 下载PDF阅读器 |