發(fā)布時間：2018-04-21 22:49

  本文選題：基于性能的抗震設(shè)計 + 既有砌體結(jié)構(gòu)��； 參考：《中國石油大學(xué)（華東）》2013年碩士論文

【摘要】：我國既有砌體結(jié)構(gòu)數(shù)量較多，材料本身的強度低、延性差，再加上設(shè)計的低標(biāo)準(zhǔn)、施工的不規(guī)范操作、老齡化以及對性能要求的提高，使得既有砌體結(jié)構(gòu)的安全性不能得到保證，由于昂貴的拆建費用、拆除對正常生活秩序和環(huán)境的嚴重影響以及抗震性能設(shè)計方法的發(fā)展，使得對既有砌體結(jié)構(gòu)進行基于性能的抗震加固研究很有必要。 本文對建筑抗震性能設(shè)計、既有砌體結(jié)構(gòu)的地震時程分析、既有砌體結(jié)構(gòu)加固以及加固優(yōu)化等問題進行了深入地研究，為工程實際應(yīng)用和相關(guān)規(guī)范規(guī)程的修訂提供可靠的技術(shù)資料，主要研究了以下幾個方面： 1．總結(jié)歸納了既有砌體結(jié)構(gòu)在檢測、鑒定和加固方面的一些問題，分析了現(xiàn)行規(guī)范規(guī)程和計算軟件在既有砌體結(jié)構(gòu)的檢測、鑒定和加固中存在的不足和矛盾，并提出了相應(yīng)的解決方案。 2．根據(jù)新建結(jié)構(gòu)的地震水平，提出了后續(xù)使用年限為30年和40年的結(jié)構(gòu)在多遇地震、抗震設(shè)防地震和罕遇地震的地震水平；考慮結(jié)構(gòu)重要性、社會影響、人員傷亡、結(jié)構(gòu)損傷、內(nèi)部設(shè)施損傷、直接經(jīng)濟損失、間接經(jīng)濟損失等影響建筑抗震性能水平的因素，對每一個因素劃分等級后評分，使抗震性能水平得到量化；將結(jié)構(gòu)性能目標(biāo)連續(xù)化，提出了性能水平分值與層間位移角限值的關(guān)系式。 3．根據(jù)場地條件和結(jié)構(gòu)條件對多條強震記錄波和人工擬合波進行篩選，天津波、遷安波和一條人工地震波能夠較好的與實際條件相吻合；根據(jù)當(dāng)?shù)氐牡卣鹚�，對天津波、遷安波和人工地震波在多遇地震、抗震設(shè)防地震和罕遇地震的峰值加速度調(diào)整；分析有效持續(xù)時間，最終得到合適的地震波時程加速度。 4．對實際工程簡化建立有限元模型，對結(jié)構(gòu)1和結(jié)構(gòu)2用處理后的天津波、遷安波和人工波進行動力時程分析，在結(jié)構(gòu)每一層讀取相對應(yīng)的3個節(jié)點最大位移值，取平均值作為反映該樓層位移的代表值，將層間位移角最大值與性能目標(biāo)相比較，，結(jié)果表明，結(jié)構(gòu)1和結(jié)構(gòu)2都不滿足抗震性能要求，需要對其加固。 5．根據(jù)當(dāng)?shù)厍闆r，對結(jié)構(gòu)1和結(jié)構(gòu)2的加固方法進行比選優(yōu)化，對采用鋼筋網(wǎng)片水泥砂漿加固法的面層位置和厚度進行優(yōu)化，最后分析加固結(jié)果并評價加固效果。
[Abstract]:There are many masonry structures in our country, the strength of the material is low, the ductility is poor, plus the low standard of design, the nonstandard operation of construction, the aging of the masonry structure, and the improvement of the performance requirements. The safety of existing masonry structure can not be guaranteed, because of the high cost of demolition and construction, the serious impact of demolition on normal living order and environment, as well as the development of seismic performance design method, It is necessary to conduct performance-based seismic reinforcement of existing masonry structures. In this paper, the problems of seismic performance design, seismic time history analysis of masonry structure, reinforcement and optimization of masonry structure are studied. To provide reliable technical data for practical engineering application and revision of relevant specifications, the following aspects are mainly studied: 1. This paper summarizes some problems in the inspection, appraisal and reinforcement of existing masonry structures, and analyzes the shortcomings and contradictions existing in the inspection, appraisal and reinforcement of existing masonry structures by the current code and calculation software. And put forward the corresponding solution. 2. According to the earthquake level of the newly built structure, the earthquake level of the structure with the following service life of 30 years and 40 years is put forward in the frequent earthquake, seismic fortification and rare earthquake, considering the importance of the structure, the social impact, the casualties, the damage of the structure, Internal facility damage, direct economic loss, indirect economic loss and other factors affecting the seismic performance level of buildings, each factor is graded to make the seismic performance level quantifiable, and the structure performance goal is continuous, The relationship between the level of performance and the limit of the displacement angle between the floors is presented. 3. According to site conditions and structural conditions, several strong earthquake recorded waves and artificial fitting waves were screened. Tianjin wave, Qian'an wave and an artificial seismic wave can be well matched with actual conditions; according to the local earthquake level, the Tianjin wave, The peak acceleration adjustment of Qian'an wave and artificial seismic wave is obtained by analyzing the effective duration of earthquake fortification earthquake and rare earthquake. Finally the appropriate time-history acceleration of seismic wave is obtained. 4. The finite element model is established for the simplification of practical engineering. The dynamic time history analysis of Tianjin wave, Qian'an wave and artificial wave after structure 1 and structure 2 is carried out, and the corresponding maximum displacement values of three nodes are read in each layer of the structure. Taking the average value as the representative value to reflect the displacement of the floor, the maximum displacement angle of the floor is compared with the performance target. The results show that both structure 1 and structure 2 do not meet the requirements of seismic performance and need to be strengthened. 5. According to the local conditions, the reinforcement methods of structure 1 and structure 2 are compared and optimized, and the position and thickness of surface layer are optimized by using reinforced mesh cement mortar reinforcement method. Finally, the reinforcement results are analyzed and the reinforcement effect is evaluated.
【學(xué)位授予單位】：中國石油大學(xué)（華東）
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU364;TU352.11

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