基于性能抗震结构全寿命周期费用研究

发布时间：2018-07-01 11:08

本文选题：抗震性能 + 全寿命周期费用　；参考：《南昌航空大学》2017年硕士论文

【摘要】：近年来基于结构性能的抗震设计得到各国学者的广泛关注并且展开了多方面的研究。在关注地震影响下结构抗震性能的同时,人们也迫切想知道结构在满足预设的不同抗震性能水平下所需要的合理成本费用,以方便寻求既满足性能要求又能被社会和业主所接受的结构方案。因此合理确定在各种抗震性能水平下的结构全寿命周期费用就非常重要。本文考虑到建筑工程的长周期特点,针对结构各级抗震性能水准,采用合理的折现计算方法对全寿命周期成本进行研究,构建结构全寿命周期费用计算方法;主要内容如下:(1)按现行规范三水准设防的设计思想,将抗震结构划分为五级抗震性能水准,以层间位移角作为量化判定标准,判断各级抗震性能水平;采用极值III型地震烈度密度函数,根据地震区划考虑不同地区函数中形状系数不同的影响,对结构采用简化的失效判据,采用变步长辛普森法编制matlab程序求解不同设防水准下结构各抗震性能水平下的失效概率,进而求出结构的失效损失期望值;(2)研究结构全寿命周期费用中检查维护费用和预期失效损失与初始造价的关系,考虑到建筑工程的长周期特点,运用随机数计算模型对我国通货膨胀率进行研究,根据通货膨胀率选取Phillip Cady提出的折现率模型对检查维护费用进行现值折现计算,采用固定折现率方法对失效损失期望进行折现计算;(3)基于以上工作构建基于抗震性能的结构全寿命周期费用的计算方法,对全寿命周期费用进行分析研究,通过不同通货膨胀水平下采用相应不同折现率水平对全寿命周期费用的计算进行对比分析,分析表明:不同折现率水平对全寿命周期费用影响很大,按全寿命周期费用最小进行的抗震优化设计需考虑不同地区经济发展水平的影响;(4)类比风险管理学中的投资风险系数,从经济学角度计算结构抗震能力系数θ,来评估结构的抗震能力。运用本文方法对两个不同地震区中实际框架结构进行全寿命周期成本计算和抗震能力计算,结果表明本文构建的全寿命周期费用计算方法完全可行。
[Abstract]:In recent years, aseismic design based on structural performance has been widely concerned by scholars all over the world and many aspects of research have been carried out. While paying close attention to the seismic behavior of structures affected by earthquakes, people also want to know the reasonable cost of structures at different levels of seismic performance. To facilitate the search for both performance requirements and can be accepted by the community and owners of structural solutions. Therefore, it is very important to reasonably determine the life cycle cost of structures under various seismic performance levels. In this paper, considering the long period characteristic of the building engineering, according to the seismic performance level of the structure at all levels, the reasonable discounted calculation method is adopted to study the whole life cycle cost, and the calculation method of the whole life cycle cost of the structure is constructed. The main contents are as follows: (1) according to the design idea of three-level fortification in current code, the aseismic structure is divided into five levels of seismic performance level, and the level of seismic performance at all levels is judged by using the displacement angle of the floor as the quantitative criterion; Based on the extreme seismic intensity density function of type III and considering the influence of different shape coefficients in different regions according to the seismic regionalization, the simplified failure criterion is adopted for the structure. The variable step Simpson method is used to compile the matlab program to solve the failure probability of different seismic performance levels of structures under different fortification levels. Then the expected value of structural failure loss is obtained. (2) to study the relationship between maintenance cost, expected failure loss and initial cost in the whole life cycle cost of the structure, taking into account the long period characteristic of building engineering, The inflation rate in China is studied by using random number calculation model. According to the discount rate model proposed by Phillip Cady, the present value of inspection and maintenance cost is calculated. The method of fixed discount rate is used to calculate the expectation of failure loss. (3) based on the above work, the calculation method of the whole life cycle cost of the structure based on seismic performance is constructed, and the life cycle cost of the structure is analyzed and studied. Through the comparative analysis of the calculation of life cycle cost with different discount rate level under different inflation level, the analysis shows that different discount rate level has great influence on the whole life cycle cost. According to the minimum life-cycle cost seismic optimization design should consider the impact of different regional economic development level. (4) compare the investment risk coefficient in risk management. The aseismic capacity of the structure is evaluated by calculating the seismic capacity coefficient 胃 from the angle of economics. The whole life cycle cost and seismic capacity of the real frame structures in two different seismic regions are calculated by using the method in this paper. The results show that the proposed method is feasible.
【学位授予单位】：南昌航空大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11

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