【摘要】：本文介紹了靜動(dòng)力彈塑性分析的研究現(xiàn)狀和在實(shí)際工程中的應(yīng)用，以實(shí)際工程為結(jié)構(gòu)模型，對(duì)其分別進(jìn)行靜動(dòng)力彈塑性的分析與研究。首先用ETABS軟件做振型反應(yīng)譜分析和彈性時(shí)程分析，校核多遇地震下能否符合“小震不壞”，設(shè)計(jì)了三種加強(qiáng)層方案，分析了各種方案對(duì)于結(jié)構(gòu)性能的影響；然后用PUSH做靜力彈塑性分析，分析結(jié)構(gòu)罕遇地震作用下的變形破壞情況以及塑性鉸的發(fā)展分布規(guī)律（其中本文選擇了比較有代表性的最大層間位移角為1/833，1/531，1/203的時(shí)刻，分析塑性鉸的變化過程），，找出罕遇地震下結(jié)構(gòu)的薄弱層和薄弱桿件等，分析結(jié)構(gòu)的破壞機(jī)制，看是否符合“大震不倒”的抗震要求；采用雙向地震輸入，用EPDA進(jìn)行動(dòng)力彈塑性分析。分析結(jié)構(gòu)在雙向地震作用下的變形扭轉(zhuǎn)性能，查看動(dòng)力彈塑性分析的計(jì)算結(jié)果是否符合規(guī)范限值，與靜力彈塑性分析的結(jié)果做比較；之后綜合靜動(dòng)力彈塑性的結(jié)果找到薄弱層位置，提出提高抗震性能的措施。 結(jié)果表明多遇地震下結(jié)構(gòu)側(cè)移符合抗震規(guī)范要求；提高混凝土強(qiáng)度和截面尺寸都可以有效提高了結(jié)構(gòu)的剛度，其中改變截面尺寸效果最明顯，但現(xiàn)實(shí)工程中改變截面尺寸要考慮諸多建筑實(shí)際因素，可行性不高，一般建議選擇提高混凝土強(qiáng)度的加強(qiáng)方案；靜力彈塑性分析與動(dòng)力彈塑性分析結(jié)果中，結(jié)構(gòu)構(gòu)件中出現(xiàn)塑性鉸，但結(jié)構(gòu)的位移反應(yīng)小于規(guī)范容許的位移限值。
[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.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU973.2

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