在役建筑增层可行性预判及工程应用研究

发布时间：2018-01-12 14:32

本文关键词：在役建筑增层可行性预判及工程应用研究　出处：《山东农业大学》2017年硕士论文　论文类型：学位论文

【摘要】：伴随着工程技术的飞速发展和房地产事业的蒸蒸日上,现如今许多老旧在役建筑已经成为经济发展和社会进步的阻碍。对于老旧在役建筑处理不善,如拆除重建或废弃闲置,很有可能会对周边环境造成污染和安全隐患,引起不必要的损失。所以近年来国家政府和国内外设计人员普遍关注老旧在役建筑的处理问题。在原有老旧在役建筑上进行增层改造修葺一新,不仅可以改变原有建筑的外貌,还能够增加建筑物的使用面积,改善建筑物的用途,达到1+12的效果,使得在役建筑物增层改造工程的经济效益明显优于重建工程。所以对一些在役建筑物进行增层改造,不仅符合时代发展潮流,对我国经济长远发展亦具有重要意义。在役建筑增层改造目前还没有形成系统性的法规和规范,而现如今我们对于在役建筑的增层改造还停留在设计院利用现有数据,通过软件进行精确计算。这样便耗费了建设方大量时间和金钱,结果却未必尽如人意。本文通过查阅国内外大量文献,通过建筑物使用时间的长短,了解建筑物的具体使用情况,依托其原有地基承载力的提高,总结并提出了预判和预估方法,利用这种方法可以快速对框架结构和砌体结构进行判断,其能否进行增层以及可增层数为多少进行了科学合理的预估,另外对各个增层方法的优缺点进行了阐释,并根据其需求为其选择合理的增层方案以及简单评价标准,这样一来便为建设方节约大量人力物力,增加效率。工程改造实例根据泰安市一框架结构商业大厦增层,通过工程软件PKPM对其进行增层改造方案的设计与计算,应用大型有限元软件ANSYS对其进行模态分析和地震作用下的动力时程分析,探究了增层前后结构各项安全指标变化和抗震规律的变化。本文主要的研究内容有以下几个方面:1、简单介绍了增层改造的背景与意义;2、简要概述了国内外增层改造研究现状;3、专业性的阐释了可靠度理论的发展和在役建筑结构可靠性鉴定流程;4、充分地探究了增层改造预估的可行性以及详细地介绍现阶段增层改造工程中常用的增层方案技术及其适用性;5、结合工程实例运用PKPM结构模块对需要增层改造的原有结构进行PMCAD建模及SATWE内力计算,得到增层前该结构的相关数据和关系,并判断该结构是否适合增层,增层的富裕度进行探究;6、根据探究的详细情况和所设计的工况条件选择合理的增层设计方案,对增层后结构进行重新建模分析;7、结合工程实例运用ANSYS对增层改造的原结构和增层改造后的结构进行模态分析和地震作用下的动力时程分析,对比分析增层对结构产生的影响,以及如何处理;8、经最终分析结果表明本增层设计方案改造后的结构具有良好的稳定性及抗震性能,其各项指标均满足现行规范要求。因此本增层改造预估及设计方案的探究对以后类似的增层改造工程具有一定参考价值。
[Abstract]:Along with the engineering technology and the rapid development of real estate industry on the upgrade, now many of the old buildings in service has become the economic development and social advancement. For the old buildings in service are not, such as the demolition and reconstruction of abandoned or idle, is likely to cause pollution and safety hazards on the surrounding environment, causing unnecessary the loss. So in recent years, the national government and the domestic and foreign designers attention old in dealing with the problem of existing building. In the original old buildings in service on increasing storey renovated, can not only change the appearance of the original building, but also to increase the use of the building area, improve the use of the building, to the effect of 1+12, which increased floor renovation project economic benefit is better than reconstruction in service buildings. So some buildings in service by layer transformation, not only accords with the development trend of the times, to Also plays an important role in the long-term development of China's economic growth in the transformation of the existing building layer. It has not formed a system of regulations and norms, and now we for increasing storey buildings in service is still in the design institute by using existing data, accurate calculation by software. This will cost a lot of time and money building the result is not satisfactory. In this paper, by consulting a large number of domestic and foreign literature, the use of the length of time through the building, the specific use of the original understanding of the building, improve the foundation bearing capacity based on the summary and put forward the anticipation and prediction method, this method can be used to quickly judge the frame structure and masonry structure, it can be by layers and layers of increasing many scientific and reasonable estimates, the advantages and disadvantages of each other by layer method are explained, and according to the needs of its choice Reasonable and simple reforming project evaluation standard, so that it is the construction side to save a lot of manpower and resources, increase the efficiency of engineering examples in Tai'an city. According to the framework of commercial building by layer, based on the engineering design and calculation software PKPM layer reconstruction scheme, using large-scale finite element software ANSYS modal analysis and under the action of earthquake on the time history analysis, to explore the changes of multilayer structure before and after the safety index changes and seismic rules. The main contents of this paper are as follows: 1, briefly introduces the background and significance of heightening reform; 2, a brief overview of the research status at home and abroad by the transformation layer; 3, professional interpretation of the reliability theory and the development of the existing building structure reliability appraisal process; 4, fully explored the feasibility and prediction of modifying layers in detail at this stage by layer modification The commonly used scheme by layer technology and its application in engineering; 5, combined with the engineering examples of the use of PKPM PMCAD modeling and SATWE module structure internal force calculation of the original structure need additional layer modification, gain layer before the relevant data structure and relationship, and determine whether the structure is suitable for increasing layer by layer research the degree of prosperity; 6, according to the details of the inquiry and the design of the working conditions of reasonable selection of the enhancement layer design of increasing layer structure after re modeling; 7, combined with the engineering examples of the use of the original structure of ANSYS adding layer and dynamic modal analysis and seismic time history analysis by structure layer after the transformation, comparative analysis of the influence of the structure of the layer increased, and how to deal with; 8, the final results of the analysis show that the increase of the structure layer design scheme is modified with stability and good seismic performance, and the indexes of the All of them meet the requirements of the current standard. Therefore, the exploration of the prediction and design of this increasing layer is of certain reference value to the similar project.

【学位授予单位】：山东农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU746.3

【参考文献】