| 引用本文: | 张文元,麦浩,于海丰.特殊铰接中心支撑框架结构振动台试验[J].哈尔滨工业大学学报,2016,48(6):17.DOI:10.11918/j.issn.0367-6234.2016.06.003 |
| ZHANG Wenyuan,MAI Hao,YU Haifeng.Shaking table test of special concentrically braced steel frame with pinned connections[J].Journal of Harbin Institute of Technology,2016,48(6):17.DOI:10.11918/j.issn.0367-6234.2016.06.003 |
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| 摘要: |
| 为研究铰接中心支撑框架结构体系的抗震性能和支撑体系的破坏模式，获得梁、柱中附加弯矩的变化规律，以8度抗震设防的某3层中心支撑框架结构为原型，按1：4的缩尺比例设计制作试验模型，并对其进行了24种地震动工况的模拟振动台试验.发现在3种地震波(Coalinga-03、Kobe、Kocaeli)的多遇烈度以及人工地震波的罕遇烈度下，结构模型的层间位移角都满足中国现行规范要求.结构能够实现大震不倒，甚至在多次罕遇地震作用后仍然具有一定的安全储备，表明该体系在高烈度区也具有良好的抗震性能.支撑节点板的存在，导致梁柱上存在附加弯矩，特别是支撑失稳后附加弯矩的影响尤为明显.经历了多次罕遇地震动的检验，支撑及其连接的设计完全实现了强节点、弱构件的抗震原则.
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| 关键词: 特殊中心支撑框架结构 振动台试验 破坏模式 附加弯矩 抗震性能 |
| DOI：10.11918/j.issn.0367-6234.2016.06.003 |
| 分类号:TU398 |
| 文献标识码:A |
| 基金项目:国家自然科学基金面上项目(5,9)； 河北省自然科学基金(E2014208115). |
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| Shaking table test of special concentrically braced steel frame with pinned connections |
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ZHANG Wenyuan1,2, MAI Hao1,2 ,YU Haifeng3
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(1.Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, 150090 Harbin, China; 2. School of Civil Engineering, Harbin Institute of Technology, 150090 Harbin,China; 3.School of Civil Engineering, Hebei University of Science and Technology, 050018 Shijiazhuang, China)
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| Abstract: |
| The one-bay and three-story concentrically braced frame built in the zone with a seismic design intensity of 8 degree was constructed with 1：4 scale, and tested using shaking table under 24 different earthquake ground motions to explore the seismic performance of special concentrically braced frame with pinned connections and the failure mode of braced system. The influence of the secondary moments on the columns and the beams was obtained. The results show that, the test model under intensity 8 frequent and rare earthquakes are all less than their limit values pursuant to the GB 50011—2010 code. The structure not only survived after the rare earthquake, even owned a certain security reserve after a series of strong earthquakes. It indicates that the structure system owns good seismic performance in the high seismic region. The secondary moments on the columns and the beams induced by the gusset plate connections become significant especially after the out-of-plane buckling of the braces. Based on the test results under a series of strong earthquakes, the seismic design principle, e.g. strong-connection-weak-member in the braces, is perfectly achieved.
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| Key words: special concentrically braced frame shaking table test failure mode secondary moment seismic performance |
