【作者】 杨旭；

【导师】 陈廷国；

【作者基本信息】 大连理工大学 ， 结构工程， 2020， 硕士

【摘要】 铝合金模板工程是我国目前正在积极推广的应用技术,得到了全行业的积极响应。但作为一项新技术,在国内尚处于探索研究和试验阶段,其力学性能尚未得到普遍认识,相应的设计、施工规范还不完善,这给企业进行力学验算带来很大的不确定性。因此,如何确定铝合金模板的力学计算模型,减少计算错误,提高设计效率和精度,成为目前亟需解决的问题。首先通过两边及四边简支L-Ⅱ型铝合金模板静力加载试验与现场施工实测数据进行对比,进而确定铝模板的支承边界条件。在此基础上,针对团队提出的一种新的L-Ⅲ型铝合金模板形式,进行了四边简支试验,试验结果表明:模板整体的最大位移、应力值明显下降,性能更优,可在今后铝合金模板市场中推广使用。基于ABAQUS有限元分析结果,同现场实测数据对比可知,采用四边简支约束的单块模板来模拟模板组更合理。同时对L-Ⅱ型和L-Ⅲ型铝合金模板的四边简支静力加载试验进行数值模拟,将有限元结果与试验实测数据进行对比,从而验证了本文采用的有限元数值模拟方法的可行性。其次以L-Ⅱ型标准铝合金模板为研究对象,采用弹性支承连续梁的设计方法,借鉴结构力学中子结构的思想求解出支承的弹性系数,并与有限元的结果对比,验证了方法的可行性。同时结合试验研究和有限元数据回归分析,推导出弹性系数的数值计算公式,用于简化工程实践中的计算过程,无需再进行额外的有限元分析,提高了计算精度和效率。最后在前人研究的基础上,对L-Ⅲ型标准铝合金模板的简化计算方法做了进一步研究,依据绝对最大弯矩的相等原则,给出了模板等效均布载荷的确定方法,编制了比例因子的计算表格,同时通过实例验证了设计方法的可靠性。本研究为L-Ⅲ型铝模板在实际工程中的应用提供了理论参考,供工程设计人员查用,便于快捷地进行工程设计。更多还原

【Abstract】 The aluminum alloy formwork project is an application technology that is currently being actively promoted in China and has received a positive response from the entire industry.However,as a new technology,it is still in the stage of exploratory research and experimentation in China.Its mechanical properties have not been generally recognized,and the corresponding design and construction specifications are not yet perfect,which brings great uncertainty to the mechanical calculation of enterprises.Therefore,how to accurately determine the mechanical calculation model of the aluminum alloy template,reduce calculation errors,and improve design efficiency and accuracy have attracted widespread attention in the industry.In this study,the field construction data of L-Ⅱ aluminum alloy formwork was compared with the two-sided simply supported and four-sided simply supported tests to determine the supporting boundary conditions of the aluminum formwork.On this basis,a new form of L-Ⅲ aluminum alloy template is proposed,the overall maximum displacement and stress value of the template is significantly reduced,and the performance is better,which can be promoted and used in the aluminum alloy template market in the future.Based on the ABAQUS finite element analysis,compared with the field measured data,it is more reasonable to use a single block template with four-sided simply supported constraints to simulate the template group.At the same time,the numerical simulation of the static loading test of L-Ⅱ and L-Ⅲ aluminum alloys is carried out,and the finite element results are compared with the experimental measured data,thus verifying the feasibility of the finite element numerical simulation method adopted in this paper.Secondly,taking the L-Ⅱ standard aluminum alloy template as the research object,the elastic support continuous beam design method is used,and the elasticity coefficient of the support is solved by referring to the neutron structure of structural mechanics,and compared with the results of the finite element,the method is verified feasibility.At the same time,combined with experimental research and regression analysis of finite element data,the numerical calculation formula of elastic coefficient is derived,which is used to simplify the calculation process in engineering practice,no additional finite element analysis is required,and the calculation accuracy and efficiency are improved.Finally,on the basis of previous studies,the theoretical calculation method of the L-Ⅲ standard aluminum alloy formwork support system is further studied.Based on the principle of equality of the absolute maximum bending moments,a method for determining the equivalent uniform load of the formwork is given.The calculation table of the scale factor is compiled,and the reliability of the design method is verified by an example.This study provides a theoretical reference for the application of L-Ⅲ aluminum formwork in actual engineering,which can be used by engineering designers for easy and quick engineering design.更多还原