發(fā)布時(shí)間：2018-11-15 06:58

【摘要】：結(jié)構(gòu)超強(qiáng)現(xiàn)象普遍存在，它相當(dāng)于提高了結(jié)構(gòu)的設(shè)計(jì)地震作用水準(zhǔn)，對(duì)結(jié)構(gòu)在強(qiáng)震作用下保持良好性能，防止倒塌等起著重要作用。雖然國內(nèi)外學(xué)者進(jìn)行了大量的研究，但是結(jié)構(gòu)超強(qiáng)研究存在較大的差異性，本文總結(jié)了現(xiàn)有超強(qiáng)分析研究存在的主要問題： (1)結(jié)構(gòu)超強(qiáng)分析方法及軟件計(jì)算模型的差異性； (2)結(jié)構(gòu)失效標(biāo)準(zhǔn)選取的差異性； (3)超強(qiáng)分析的對(duì)象不同； (4)雙向地震作用研究的欠缺； (5)非結(jié)構(gòu)構(gòu)件——填充墻豎向不規(guī)則布置的研究較為欠缺�；谝陨蠁栴}，本文初步完成了以下三個(gè)方面的研究工作： (1)嚴(yán)格按照規(guī)范設(shè)計(jì)6棟不同高度鋼筋混凝土框架結(jié)構(gòu)，，以三維空間框架為研究對(duì)象，采用統(tǒng)一的失效標(biāo)準(zhǔn)，對(duì)結(jié)構(gòu)進(jìn)行靜力推覆分析（pushover）和單向增量動(dòng)力分析（IDA），考察兩種分析方法的差異性及結(jié)構(gòu)超強(qiáng)的變化規(guī)律。 (2)對(duì)結(jié)構(gòu)進(jìn)行雙向地震動(dòng)輸入下的IDA分析，考察此時(shí)結(jié)構(gòu)超強(qiáng)的變化規(guī)律，并比較單、雙向IDA分析下結(jié)構(gòu)超強(qiáng)的差異性。 (3)考察典型空間框架在考慮不同填充墻布置情況下結(jié)構(gòu)超強(qiáng)能力的影響。通過以上研究，得出的主要結(jié)論如下： (1) Pushover分析與單向IDA分析得出的超強(qiáng)系數(shù)在層數(shù)較少時(shí)較為接近，層數(shù)較多時(shí)，IDA分析得出的超強(qiáng)系數(shù)均大于pushover分析得出的超強(qiáng)系數(shù)；兩種分析方法得出的超強(qiáng)系數(shù)變化規(guī)律較為一致，即1層到5層超強(qiáng)系數(shù)逐漸降低，7層以后逐漸變大，到9層以后變化趨于平緩。 (2)與單向IDA分析相比，雙向IDA分析時(shí)結(jié)構(gòu)的超強(qiáng)系數(shù)均會(huì)出現(xiàn)不同程度的降低，并且結(jié)構(gòu)層間變形機(jī)制會(huì)發(fā)生改變，結(jié)構(gòu)也提早進(jìn)入失效狀態(tài)。 (3)結(jié)構(gòu)滿布填充墻時(shí)結(jié)構(gòu)超強(qiáng)提高的程度較大，底層架空時(shí)結(jié)構(gòu)超強(qiáng)提高的較小，上部某樓層架空時(shí)對(duì)結(jié)構(gòu)超強(qiáng)影響不明顯。 (4)填充墻對(duì)結(jié)構(gòu)超強(qiáng)的影響與結(jié)構(gòu)層數(shù)有關(guān)，結(jié)構(gòu)層數(shù)小于7層且底層非架空時(shí)，填充墻對(duì)超強(qiáng)的提高程度大，同種填充墻布置下的12層結(jié)構(gòu)，填充墻對(duì)超強(qiáng)的提高程度較��；若結(jié)構(gòu)底層出現(xiàn)架空層，則填充墻對(duì)超強(qiáng)提高均不明顯。(5)嚴(yán)格按照我國規(guī)范設(shè)計(jì)的鋼筋混凝土空間框架結(jié)構(gòu)超強(qiáng)系數(shù)最小值建議取2.0。
[Abstract]:The phenomenon of super strength of structure exists generally, which is equivalent to raising the level of design earthquake action of structure, and plays an important role in maintaining good performance of structure under strong earthquake, preventing collapse and so on. Although scholars at home and abroad have done a lot of research, there is a great difference in the study of structural superstrength. In this paper, the main problems in the research of superstrength analysis are summarized: (1) the differences of the structural superstrength analysis methods and the software calculation models; (2) difference of structural failure criteria, (3) different objects of super strength analysis, (4) lack of research on bidirectional seismic action; (5) the research on the vertical irregular arrangement of the non-structural member-infilled wall is deficient. Based on the above problems, this paper has preliminarily completed the following three aspects of the research work: (1) six reinforced concrete frame structures with different heights are designed strictly according to the specifications, and the three-dimensional spatial frame is taken as the research object. According to the unified failure criterion, the difference of the two analysis methods and the variation law of the superstrength of the structure are investigated by static push-over analysis (pushover) and unidirectional incremental dynamic analysis (IDA),). (2) the IDA analysis of the structure under the bidirectional ground motion input is carried out, and the variation law of the structure superstrength is investigated, and the difference of the structure super strength under the single and bidirectional IDA analysis is compared. (3) the influence of the super-capacity of the typical space frame under the condition of different infill wall arrangement is investigated. Through the above research, the main conclusions are as follows: (1) the superstrength coefficient obtained by Pushover analysis and unidirectional IDA analysis is close when the number of layers is less, and when the number of layers is more, The superstrength coefficient obtained by IDA analysis is higher than that by pushover analysis. The changes of the superstrength coefficients obtained by the two analysis methods are consistent, that is, the super-strength coefficients of one to five layers decrease gradually, the latter gradually become larger after 7 layers, and the change tends to be flat after 9 layers. (2) compared with the unidirectional IDA analysis, the superstrength coefficients of the structures in the bidirectional IDA analysis will be reduced to varying degrees, and the deformation mechanism between the layers of the structures will be changed, and the structure will enter into the failure state earlier. (3) when the structure is filled with filled walls, the degree of the super strength of the structure is higher than that of the bottom floor, and the influence of the upper floor on the super strength of the structure is not obvious when the upper floor is overhead. (4) the influence of infilled wall on the super strength of the structure is related to the number of layers of the structure. When the number of structural layers is less than 7 stories and the bottom floor is not overhead, the effect of the infilled wall on the super strength of the structure is large, and the 12-story structure of the same type of infill wall is arranged. The enhancement degree of the infill wall to the super strength is small; If there is an overhead layer at the bottom of the structure, the enhancement of the superstrength of the infilled wall is not obvious. (5) the minimum value of the superstrength coefficient of the reinforced concrete spatial frame structure designed strictly according to the code of our country is suggested to be 2.0.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU375.4

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