| 基于能量的网壳结构协调抗震性能分析 |
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| 引用本文： | 张明,周广春,张克跃,贾宏宇,李兰平,张德义.基于能量的网壳结构协调抗震性能分析[J].西南交通大学学报,2018,53(2):234-243. |
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| 作者姓名： | 张明 周广春 张克跃 贾宏宇 李兰平 张德义 |
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| 作者单位： | 西南交通大学土木工程学院;哈尔滨工业大学结构工程灾变与控制教育部重点实验室;哈尔滨工业大学土木工程学院 |
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| 基金项目： | 国家自然科学基金资助项目51608452国家重点研发计划资助项目2016YFC0802205中央高校基本科研业务费专项资金科技创新项目10101B10096040 |
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| 摘 要： | 为了揭示地震作用下网壳结构各局部间受力状态及该变化与结构承载能力间的关系，对有限元全荷载域动力时程分析应变能数据进行了再建模，在此基础上应用能量参数系统研究了地震作用下网壳结构各杆件内力重分布.研究结果表明，网壳结构在工作状态下各单元间能够协调、稳定地共同承担外荷载；当结构失效后，各单元间协调变形的稳定性被破坏，基于协调变形可以判断网壳结构的工作状态；在水平向动荷载作用下，单层网壳中下部指数应变能较大，径杆最大值出现在第5环，约为第1环的13倍；三向地震波作用下，中上部指数应变能较大，径杆最大值出现在第2环，约为第6环的15倍.
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| 关 键 词： | 能量 变形能 网壳结构 地震作用 协调性 |
| 收稿时间： | 2016-01-05 |
Energy-Based Analysis of Anti-Seismic Performance of Latticed Shell in Coordination |
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| ZHANG Ming,ZHOU Guangchun,ZHANG Keyue,JIA Hongyu,LI Lanping,ZHANG Deyi.Energy-Based Analysis of Anti-Seismic Performance of Latticed Shell in Coordination[J].Journal of Southwest Jiaotong University,2018,53(2):234-243. |
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| Authors: | ZHANG Ming ZHOU Guangchun ZHANG Keyue JIA Hongyu LI Lanping ZHANG Deyi |
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| Abstract: | An analytical numerical model was rebuilt to reveal changes in local stress state in a single-layer reticulated shell under earthquake, as well as the relationship between the changes and structural failure loads. The numerical model was rebuilt based on the strain energy from nonlinear response history analyses at increasing levels of ground motion intensity to systematically study the redistribution of seismic internal force in elements in the single-layer reticulated shell by using the strain energy parameter. The results showed that elements in a single-layer shell can bear seismic loads harmoniously and steadily in the normal working state. However, harmonious and steady characteristics were not observed in the failure state. Therefore, different stress states can be distinguished by checking the structural coordinative working capability. In addition, the strain energy in the lower parts of the single-layer reticulated shell was larger than that in other parts such as in the radial members under horizontal ground motion, the maximum value was observed in the fifth hoop, which was 13 times larger than that in the first hoop. The strain energy in the upper parts of the single-layer reticulated shell was larger than that in other parts such as in the radial members under 3D ground motion; the maximum value was observed in the second hoop, which was 15 times than that in the sixth hoop. |
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