共查询到19条相似文献,搜索用时 46 毫秒
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本文通过对10万m3原油罐地基地质条件进行分析和对各种处理方案进行综合比较,最终确定该场地基础处理的最优方案。 相似文献
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为科学合理地优选桥梁拆除方案,针对已有评价方法中评价指标模糊处理过于简化以及AHP确定指标权重主观性强的问题,首次构建了包含5项一级指标和17项二级指标的桥梁拆除方案评价指标体系;在AHP确定指标权重的基础上,创新性地运用直觉模糊理论和MYCIN不确定因子,融合不确定因子证据信息和权重,根据实质不确定因子最大化原则来进... 相似文献
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湿陷性黄土地基处理方案的优选与应用 总被引:2,自引:0,他引:2
结合工程实例,分析各种处理湿陷性黄土地基方法的特点及造价,对湿陷性黄土地基处理方案进行优选,并通过现场试桩证明了其优选方案处理效果良好。 相似文献
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简要介绍了层次分析法决策的基本步骤。以某填土地基为例,运用层次分析法,在构建模型和判断矩阵的基础上,通过层次排序权重的计算及一致性检测,完成了地基处理方案的优选。结果表明:层次分析法决策过程概念清晰、数据准确,决策结果符合实际。 相似文献
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针对高速公路软基处理方案优选的问题,提出运用层次分析法和建立模糊优选模型的综合评价方法,根据各方案的相似度大小确定最优方案。最后,通过实例证明了该方法的可靠性。 相似文献
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This paper uses both fuzzy analytic hierarchy process (FAHP) and the cross entropy of interval-valued intuitionistic fuzzy sets on risk identification of dams. The problem of risk identification can be transformed into a multi-criteria decision-making problem under fuzzy environment. Based on the weight of criteria calculated by the FAHP method and the interval-valued intuitionistic fuzzy information of risk aggregated by geometric average operator, the weight of each alternative can be obtained. The proposed method is used to identify the main risk factors of an earth–rock dam and to rank potential failure modes of the dam. The proposed method takes into account the interval unknown degree (hesitancy degree) in dam safety assessment and it is more effective and accurate in real conditions of dam operation. 相似文献
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在建筑工程中,混凝土基础的施工质量直接关系到上层结构的安全性和稳定性,因此对混凝土基础施工中地基处理与浇筑工艺的要求也越来越高。对于地基处理部分,文章分析了其重要性和常见处理方式,提出了针对性的优化措施,以提高地基承载力和稳定性;对于浇筑工艺方面,文章详细描述了其现状和所面临的困难,提出了提高浇筑质量和效率以及优化技术和管理的措施。 相似文献
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Colin B. Brown 《Structural Safety》1990,7(2-4):155-163
Optimization has the appeal of mathematical elegance and the possiblity of being of practical significance. This significance is examined for the problem of producing least-cost structures. For aircraft, this simplifies to the production of structures of least weight, whereas in civil engineering, the existing conditions for design and construction in the United States seldom produce an environment for the existence of least-cost structures. Optimization procedures are examined within these situations when the objective functions and constraints are deterministic and when they are uncertain. The uncertainty is expressed as amenable to both probabilistic and fuzzy set specifications. This transformation, from crisp optimization to the concept of satisficing of structures, is explored. 相似文献
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杨志华 《四川建筑科学研究》2005,31(6):170-173
分析了影响住宅健康性的主要因素,建立了评价住宅整体性健康的指标体系;并根据评价指标体系复杂、影响因素多的特点,提出了模糊数学综合评价方法,编制了计算机评价系统程序。 相似文献
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Ehsan Eshtehardian Abbas Afshar Reza Abbasnia 《Construction Management & Economics》2013,31(7):679-691
Uncertainties should be considered in any time–cost trade‐off problems when minimizing project cost and duration, which leads to the so‐called stochastic time–cost trade‐off problem. A new approach to investigate stochastic time–cost trade‐off problems employing fuzzy logic theory is presented. The proposed approach fully embeds the fuzzy structure of the uncertainties in total direct cost into the model. An appropriate GA is used to develop a solution to the multi‐objective fuzzy time cost model. The accepted risk level of the project manager is defined through α cut approach for which a separate Pareto front with set of non‐dominated solutions has been developed. To compare the alternative set of options for any assumed project duration, associated fuzzy costs for different values of α cut are ranked employing two appropriate approaches for fuzzy costs comparison. The proposed models are applied to solve two benchmark test problems. It is shown that the models facilitate the decision‐making process by selecting specified risk levels and employing the associated Pareto front. 相似文献
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深基坑支护方案的模糊优选模型及其应用 总被引:18,自引:1,他引:17
针对深基坑支护方案的特点,应用模糊数学理论及最小二乘法准则构造目标函数,建立了一种适用于深基坑支护方案综合评价的模糊优化理论模型。以某大厦深基坑支护拟用的3种方案评价为例,说明了该模型的应用,并与采用其它方法得到的结果进行了对比,为施工决策者提供了一种科学有效的评判方法。 相似文献