超高层框架—核心筒结构静动力弹塑性分析与研究
发布时间：2018-07-28 12:02
【摘要】：本文介绍了静动力弹塑性分析的研究现状和在实际工程中的应用，以实际工程为结构模型，对其分别进行静动力弹塑性的分析与研究。首先用ETABS软件做振型反应谱分析和弹性时程分析，校核多遇地震下能否符合“小震不坏”，设计了三种加强层方案，分析了各种方案对于结构性能的影响；然后用PUSH做静力弹塑性分析，分析结构罕遇地震作用下的变形破坏情况以及塑性铰的发展分布规律（其中本文选择了比较有代表性的最大层间位移角为1/833，1/531，1/203的时刻，分析塑性铰的变化过程），，找出罕遇地震下结构的薄弱层和薄弱杆件等，分析结构的破坏机制，看是否符合“大震不倒”的抗震要求；采用双向地震输入，用EPDA进行动力弹塑性分析。分析结构在双向地震作用下的变形扭转性能，查看动力弹塑性分析的计算结果是否符合规范限值，与静力弹塑性分析的结果做比较；之后综合静动力弹塑性的结果找到薄弱层位置，提出提高抗震性能的措施。 结果表明多遇地震下结构侧移符合抗震规范要求；提高混凝土强度和截面尺寸都可以有效提高了结构的刚度，其中改变截面尺寸效果最明显，但现实工程中改变截面尺寸要考虑诸多建筑实际因素，可行性不高，一般建议选择提高混凝土强度的加强方案；静力弹塑性分析与动力弹塑性分析结果中，结构构件中出现塑性铰，但结构的位移反应小于规范容许的位移限值。
[Abstract]:In this paper, the research status and application of static and dynamic elastoplastic analysis are introduced. Taking the actual engineering as the structural model, the static and dynamic elastoplastic analysis and research are carried out respectively. First, the mode response spectrum analysis and elastic time history analysis are done by using ETABS software to check whether or not the frequent earthquake can accord with "small earthquake is not bad". Three kinds of strengthening layer schemes are designed, and the influence of various schemes on the structure performance is analyzed. Then PUSH is used to analyze the deformation and failure of the structure under rare earthquake and the development and distribution of plastic hinge. (in this paper, the representative moment of the maximum interstory displacement angle of 1 / 833 / 1 / 531 / 203 is selected. Analyzing the changing process of plastic hinge), finding out the weak layer and the weak member of the structure under rare earthquake, analyzing the failure mechanism of the structure to see if it conforms to the seismic requirement of "large earthquake does not fail", and adopting two-way earthquake input, The dynamic elastoplastic analysis was carried out by EPDA. The deformation and torsional behavior of the structure under the action of bi-directional earthquake is analyzed, and the calculated results of dynamic elastic-plastic analysis are compared with the results of static elastic-plastic analysis. Based on the static and dynamic elastoplastic results, the position of the weak layer is found, and the measures to improve the seismic performance are put forward. The results show that the lateral displacement of the structure meets the requirements of the seismic code under frequent earthquakes, and the stiffness of the structure can be effectively improved by increasing the strength and section size of concrete, among which the effect of changing the cross-section size is the most obvious. However, many practical factors should be taken into account in changing the section size in practical engineering, and the feasibility is not high. It is generally suggested to choose a strengthening scheme to improve the strength of concrete; in the results of static elastic-plastic analysis and dynamic elastic-plastic analysis, The plastic hinge appears in the structural member, but the displacement response of the structure is less than the allowable displacement limit value of the code.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.2
本文编号：2150070
[Abstract]:In this paper, the research status and application of static and dynamic elastoplastic analysis are introduced. Taking the actual engineering as the structural model, the static and dynamic elastoplastic analysis and research are carried out respectively. First, the mode response spectrum analysis and elastic time history analysis are done by using ETABS software to check whether or not the frequent earthquake can accord with "small earthquake is not bad". Three kinds of strengthening layer schemes are designed, and the influence of various schemes on the structure performance is analyzed. Then PUSH is used to analyze the deformation and failure of the structure under rare earthquake and the development and distribution of plastic hinge. (in this paper, the representative moment of the maximum interstory displacement angle of 1 / 833 / 1 / 531 / 203 is selected. Analyzing the changing process of plastic hinge), finding out the weak layer and the weak member of the structure under rare earthquake, analyzing the failure mechanism of the structure to see if it conforms to the seismic requirement of "large earthquake does not fail", and adopting two-way earthquake input, The dynamic elastoplastic analysis was carried out by EPDA. The deformation and torsional behavior of the structure under the action of bi-directional earthquake is analyzed, and the calculated results of dynamic elastic-plastic analysis are compared with the results of static elastic-plastic analysis. Based on the static and dynamic elastoplastic results, the position of the weak layer is found, and the measures to improve the seismic performance are put forward. The results show that the lateral displacement of the structure meets the requirements of the seismic code under frequent earthquakes, and the stiffness of the structure can be effectively improved by increasing the strength and section size of concrete, among which the effect of changing the cross-section size is the most obvious. However, many practical factors should be taken into account in changing the section size in practical engineering, and the feasibility is not high. It is generally suggested to choose a strengthening scheme to improve the strength of concrete; in the results of static elastic-plastic analysis and dynamic elastic-plastic analysis, The plastic hinge appears in the structural member, but the displacement response of the structure is less than the allowable displacement limit value of the code.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.2
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