【作者】 张健；

【导师】 俞然刚；

【作者基本信息】 中国石油大学（华东） ， 岩土工程， 2013， 硕士

【摘要】 我国既有砌体结构数量较多，材料本身的强度低、延性差，再加上设计的低标准、施工的不规范操作、老龄化以及对性能要求的提高，使得既有砌体结构的安全性不能得到保证，由于昂贵的拆建费用、拆除对正常生活秩序和环境的严重影响以及抗震性能设计方法的发展，使得对既有砌体结构进行基于性能的抗震加固研究很有必要。本文对建筑抗震性能设计、既有砌体结构的地震时程分析、既有砌体结构加固以及加固优化等问题进行了深入地研究，为工程实际应用和相关规范规程的修订提供可靠的技术资料，主要研究了以下几个方面：1．总结归纳了既有砌体结构在检测、鉴定和加固方面的一些问题，分析了现行规范规程和计算软件在既有砌体结构的检测、鉴定和加固中存在的不足和矛盾，并提出了相应的解决方案。2．根据新建结构的地震水平，提出了后续使用年限为30年和40年的结构在多遇地震、抗震设防地震和罕遇地震的地震水平；考虑结构重要性、社会影响、人员伤亡、结构损伤、内部设施损伤、直接经济损失、间接经济损失等影响建筑抗震性能水平的因素，对每一个因素划分等级后评分，使抗震性能水平得到量化；将结构性能目标连续化，提出了性能水平分值与层间位移角限值的关系式。3．根据场地条件和结构条件对多条强震记录波和人工拟合波进行筛选，天津波、迁安波和一条人工地震波能够较好的与实际条件相吻合；根据当地的地震水平，对天津波、迁安波和人工地震波在多遇地震、抗震设防地震和罕遇地震的峰值加速度调整；分析有效持续时间，最终得到合适的地震波时程加速度。4．对实际工程简化建立有限元模型，对结构1和结构2用处理后的天津波、迁安波和人工波进行动力时程分析，在结构每一层读取相对应的3个节点最大位移值，取平均值作为反映该楼层位移的代表值，将层间位移角最大值与性能目标相比较，结果表明，结构1和结构2都不满足抗震性能要求，需要对其加固。5．根据当地情况，对结构1和结构2的加固方法进行比选优化，对采用钢筋网片水泥砂浆加固法的面层位置和厚度进行优化，最后分析加固结果并评价加固效果。更多还原

【Abstract】 There are many existing masonry structure in our country. This structure’s material haslow-intensity and poor ductility. Substandard design, nonstandard construction, aging andhigher performance requirement make the safety of the existing masonry structure can’t beguaranteed. The expensive cost of rebuilding, the huge impact to the normal living order andenvironment which the remove generates and the developments of method in the seismicperformance design make the performance-based seismic hardening study of existingmasonry structure necessary.The article discusses the architecture’s seismic performance design, seismic time-historyanalysis, structural strengthening and strength optimum of the existing masonry structuredeeply, which supply reliable technical literature to the practical application in engineeringand the revise of the related criterion. There are several following aspects:1、Summarize some issues in the detection, evaluation and strengthening of the existingmasonry structure necessary, analyse the shortage and contradiction of the existingmasonry structure’s detection, evaluation and strengthening in current specificationand software for calculation, and propose the homologous solution.2、In line with the earthquake level of new structure, put forward the earthquake level ofthe structure whose continuous seismic working life is30or40years in frequentearthquake, anti-seismic fortification earthquake and rare earthquake; Consider thefactors which affect anti-seismic capability level of building, such as structureimportance, social impact, casualties, structural damage, in-house facility damage,direct economic loss, indirect economic loss, etc. And grade every factor, quantizethe anti-seismic capability level; Serialize the structural performance objective, andput forward the relation between capability level value and story drift angles’limitingvalue.3、On the basis of the site condition and structure condition, screen strong shock’srecorded wave and artificial fitting wave, Tianjin seismic waves, Qian’an seismicwaves and artificial seismic wave can agree with physical condition better. In linewith local earthquake level, adjust peak acceleration of Tianjin seismic waves, Qian’an seismic waves and artificial seismic wave in frequent earthquake,anti-seismic fortification earthquake and rare earthquake; Analyse effective duration,and get proper seismic wave time-histories acceleration.4、Simplify practical engineering and establish finite element model, carry dynamic andtime-historical analysis to structure1and structure2with worked Tianjin seismicwaves, Qian’an seismic waves and artificial seismic wave, read correspondentmaximum displacement of3panel points at structure’s every layer, take averaging ascentral value which reflects this floor’s displacement, and compare the maximum ofstory drift angles with performance objective. The result shows that anti-seismicperformance requirement are dissatisfied in structure1and structure2, which shouldbe strengthened.5、In line with local conditions, take comparison and selection to the strengtheningmethod of structure1and structure2, optimize the location and thickness of surfacecourse which uses masonry strengthening with mortar splint, analyse thestrengthening result and evaluate strengthening effect.更多还原