| 引用本文: | 贾立哲,陈德珅.汶川地震钢混框排架主厂房反应特性分析[J].哈尔滨工业大学学报,2014,46(6):8.DOI:10.11918/j.issn.0367-6234.2014.06.002 |
| JIA Lizhe,CHEN Deshen.Seismic response characteristics for R.C. frame-bent main building under Wenchuan earthquake[J].Journal of Harbin Institute of Technology,2014,46(6):8.DOI:10.11918/j.issn.0367-6234.2014.06.002 |
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| 摘要: |
| 在对比El Centro波、Taft波、汶川-江油波等不同强震主厂房反应特性的基础上,直接采用不同峰值的汶川-江油波开展动力弹塑性时程分析,探究主厂房这类典型结构在汶川这类特殊地震动下的响应特性和震损机理．结果表明:汶川-江油波作用下结构的响应偏小,但变化更不规律;主厂房能够抵御远超设防烈度的汶川-江油地震作用而不发生严重的失效破坏;结构扭转效应显著,煤斗层始终为结构薄弱层;框架部分刚度衰退快于排架部分,排架部分承担总地震作用比例先提高后不变,总体比例处于较低水平,无法成为结构的第二道抗震防线;虽汽机房网架屋面不会因杆件强度破坏而垮塌,但由于支座处承受剪力巨大且变形过大,支座的率先破坏将引发屋盖系统的失稳破坏;主厂房率先进入塑性的构件主要集中在底层和煤斗层,表现为明显的“强梁弱柱”特点． |
| 关键词: 汶川地震 框排架 主厂房 屋盖系统 地震反应 |
| DOI：10.11918/j.issn.0367-6234.2014.06.002 |
| 分类号:TU375 |
| 基金项目:国家自然科学基金资助项目(51008100); 中国博士后科学基金特别资助项目(201104413)． |
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| Seismic response characteristics for R.C. frame-bent main building under Wenchuan earthquake |
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JIA Lizhe, CHEN Deshen
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(School of Civil Engineering, Harbin Institute of Technology, 150090 Harbin, China)
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| Abstract: |
| The responses of main building under different strong earthquakes, such as El Centro, Taft, Wenchuan-Jiangyou were compared, and dynamic time history analysis based on Wenchuan-Jiangyou record with different peak values was used to reveal the damage mechanism of this typical structure. The results indicate that the response of Wenchuan-Jiangyou record is the smallest, but variability is the biggest. Wenchuan earthquake, which is more than design intensity, does not cause serious damage of main building. The torsional effect is remarkable, and coal scuttle layer is always weak layer. The stiffness degradation of frame is faster than the bent part, and the proportion of bent part within total earthquake action is enhanced firstly and then remains same. But the overall proportion is still in low level and bent part is unable to become the second resistance component. Although space grid roof system in turbine hall does not collapse because of strength failure of components, the bearing carries over huge shearing force with oversized distortion, and the failure of bearing will lead to collapse of roof system. Plastic deformations mainly concentrate in the first floor and coal scuttle layer, and “strong beam and weak column” are exposed. |
| Key words: wenchuan earthquake frame bent structure main building roof system seismic response |
