含不等高箱梁异型节点大型火电主厂房钢框排架结构拟动力试验研究

发布时间：2018-01-07 04:10

本文关键词：含不等高箱梁异型节点大型火电主厂房钢框排架结构拟动力试验研究　出处：《建筑结构学报》2014年07期 　论文类型：期刊论文

【摘要】：为研究大型火电厂含异型节点钢框排架主厂房的抗震性能,对缩尺比为1∶10的1 000 MW级火电主厂房钢框排架模型结构进行拟动力试验。输入El Centro波、Taft波和兰州地震波,地震动加速度峰值分别相当于8度多遇地震和7.5、8度设防烈度地震和8、9度罕遇地震,实测了模型结构的应变分布、加速度反应和位移反应。分析了模型结构的滞回特性、加速度放大系数、位移时程曲线以及塑性铰分布。结果表明:含异型节点火电钢框排架主厂房结构总体具有较好的抗震性能,能满足规范"大震不倒"的要求,但由于异型节点处煤斗梁刚度较大且该处承受较大的竖向荷载(煤斗及储煤质量),导致其层间位移分布与无刚度或质量突变的常规钢框架规律不同;异型节点处存在着明显的"强梁弱柱"现象,该类节点大梁底面柱端易产生塑性铰,不利于耗能和抗震。
[Abstract]:For the study of large thermal power plants with abnormal seismic performance of frame joints of steel frame of main building, on the scale of 1: 1000 MW thermal power plant main 10 steel frame model structure pseudo dynamic test was carried out. The input El Centro wave, Taft wave and Lanzhou earthquake wave, peak ground acceleration were equivalent to 8 degrees the earthquake fortification intensity earthquake and 7.5,8 degree and 8,9 degree earthquake, the measured strain distribution model, acceleration response and displacement response analysis model. The hysteretic behavior of the structure, the acceleration amplification coefficient, displacement curve and plastic hinge distribution. The results show that the frame of main building structure has a good seismic performance of abnormal joints of steel with thermal power, can meet the standard of "earthquake does not fall", but because of abnormal joints stiffness is large and the coal bearing vertical load (large coal bunker and coal storage, quality) leads to a layer Shift distribution is different from non conventional steel frame of stiffness and mass of mutations; abnormal joints exist obvious phenomenon, the "strong beam weak column" the joint beam bottom column is easy to produce the plastic hinge, is not conducive to energy and seismic.

【作者单位】：广西大学土木建筑工程学院;广西电力工业勘察设计研究院博士后工作站;西安建筑科技大学土木工程学院;
【基金】：中国博士后科学基金项目(20080440814) 国家自然科学基金项目(51168002)
【分类号】：TU391;TU317.1
【正文快照】： 0引言在1994年美国的Northridge地震和1995年日本的Kobe地震中,出现了大量钢框架结构梁柱节点脆性断裂破坏,节点成为钢框架结构抗震的薄弱环节[1-3]。近10年来,国内外学者对此展开了试验研究和理论分析[4-7],给出了节点的设计建议,并提出了如狗骨式节点连接等有利于提高构件延

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