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1.
    
Delays in construction projects are inevitable and, as a result, claims and disputes arise. Different causes of delay can come into play and therefore the need to identify and classify different causes of project delay arises. Different factors that contribute to project delay affect the likelihood of project delay in different degree of effectiveness. Fuzzy fault tree analysis (FTA) is suggested by this research to estimate the likelihood of project delay. Likelihood of delay membership function is further quantified using the weighted average defuzzification method. Two fuzzy logic models are implemented into the fuzzy FTA, using Visual Basic software: the models discussed in this research are Baldwin's rotational model and the Angular model. Comparison between the two fuzzy logic models has been carried out. Validation of the fuzzy FTA computer model is performed. Validation of the model was performed for adequacy and applicability of the model. On average, the validation performed by independent construction engineers and fuzzy logic experts produced satisfactory results. The computer software suggested by this study is an attempt to assess the likelihood of the project delay, which helps reduce delays in construction projects that can cause time loss.  相似文献   

2.
Different studies in recent years show that many structural failures are due to errors in planning, design, construction and utilization. These are difficult to quantify and have not been considered in probabilistic design methodologies (reliability theory). In practice the designer must use his practical experiences, the actual conditions and the pure speculations when evaluating safety factor values. Therefore, the reliability of structures is not only an objective but also a subjective concept, which is a property of the designer's state of knowledge. They need a way of combining all the subjective information, which are of multivalued nature and come from multiple sourcesof estimates.

In this study an inferential method applying fuzzy set and fuzzy logic to analyze safety of the existing structures is presented.  相似文献   


3.
可持续发展战略的实施对传统的煤炭建设项目经济评价体系提出了新的挑战。文章在建立煤炭建设项目可持续发展评价指标体系的基础上,运用基于集对分析的集对势,建立煤炭建设项目经济、社会、资源、环境协调发展综合评价模型。使用该模型对某煤炭建设项目做可持续发展评价,并且计算过程简单,操作性强,为煤炭建设项目在可研阶段进行可持续发展评价提供一定的参考。  相似文献   

4.
胡文发  薄卫彪 《施工技术》2005,34(12):20-22
采用P3软件对一个大型工程项目进行进度延迟分析,并且定量分析工程进度延迟的责任,提出避免大型建设工程建设项目进度延迟的有效措施,对大型复杂项目进度控制提供借鉴。  相似文献   

5.
目前,国内外工程项目的承发包模式众多,在对国内外各种承发包模式综合研究的基础上,将其分成了包括传统的 DBB 模式、工程总承包模式和项目管理承发包模式三大类别,分析了各种承发包模式的特点和适用范围,为了更好地实现项目的既定目标,针对不同的项目承发包模式,提出了不同的造价控制方法。并具体分析了工程项目各种承发包模式的特点及与项目造价控制的关系,试图在项目质量、工期和造价目标相互平衡的条件下,寻求最有利于投资者进行造价控制的最优承发包模式。  相似文献   

6.
黄玉翠 《城市建筑》2014,(8):233-233
工程竣工结算的质量对工程造价有着重要的影响,因此提高建筑工程竣工结算的审核质量十分重要。本文叙述了工程竣工阶段审核的基本步骤以及工程竣工结算审核中存在的问题,提出了提高工程竣工审核质量的方法。  相似文献   

7.
本文通过汇总近年来的国际延误分析方法的相关文献,按照非关键路径类(Non-CPM)方法和关键路径类(CPM)方法两类分别进行介绍;从方法比较和方法选择两方面对前任研究成果进行总结、讨论,从同期延误、资源配置与限制、时差所有权和生产效率4 个方面总结了相应的基本方法的改进思路。研究者们对已有方法进行比较,分析每种方法的特点,进而研究如何选择合适的方法,同时也在不断地改善旧方法提出新思路,使得延误分析方法向着精细化、复杂化和综合化的方向发展。  相似文献   

8.
侯玲 《城市建筑》2013,(24):185-186
随着改革开放的深入开展以及市场经济确立,我国经济有了突飞猛进发展。如何开展建筑工程预结算审核,使有限的资金投入充分发挥效益呢?本文详细论述了建筑工程项目造价预结算审核中的要点研究。  相似文献   

9.
对公路工程施工机械合理选择的主要依据、一般原则、选择方法以及科学的配套组合等技术问题进行了简要的总结和分析,以期保证公路建设的施工质量,获得最佳的技术经济效益和社会效益.  相似文献   

10.
建设方科学地确定项目造价,不但要对项目施工全阶段开展造价控制,更要对项目结算审核阶段有充分的认识。本文结合工作经验,分析了建设单位如何把好工程项目结算审核关。  相似文献   

11.
黄桂玉 《城市建筑》2014,(26):97-97
建设方科学地确定项目造价,不但要对项目施工全阶段开展造价控制,更要对项目结算审核阶段有充分的认识。本文结合工作经验,分析了建设单位如何把好工程项目结算审核关。  相似文献   

12.
邱赛楠  王帅 《城市建筑》2014,(6):180-180
本文主要就建筑工程造价预结算审核中的要点问题进行了深入探讨,分别对建筑工程设计变更单和施工签证单审核、工程量审核、单价套用审核、取费审核等审核内容进行了阐述,并提出了自己的一些观点,以供同行参考。  相似文献   

13.
基于熵权的模糊分析法在风险管理中的应用   总被引:1,自引:0,他引:1  
李亮  汤靓  郑雷纲 《山西建筑》2007,33(8):198-199
在分析建设项目风险管理的基础上,结合模糊数学中层次分析法和熵权的概念,建立了熵权模糊分析模型。针对建设项目中的风险因素,提供了管理决策的依据,以正确的进行项目风险的管理和决策工作。  相似文献   

14.
项目经理作为工程项目的组织者和第一责任人,其能力与素质对工程项目管理的成败有决定性的影响。首先,使用内容分析法,概括建筑工程实践者和学者们在公开发表的论文中所提到的项目经理应该具有什么能力与素质,进行非介入式分析;然后,通过对独立公正的第三方监理进行问卷调查的方式,分析工程项目经理各种能力对项目成功的影响,进行实证性的分析。最后,对分析结果进行讨论并给出建议。  相似文献   

15.
    
The impact of (adverse) weather is a common cause of delays, legal claims and economic losses in construction projects. Research has recently been carried out aimed at incorporating the effect of weather in project planning; but these studies have focussed on either a narrow set of weather variables, or a very limited range of construction activities or projects. A method for processing a country’s historical weather data into a set of weather delay maps for some representative standard construction activities is proposed. Namely, sine curves are used to associate daily combinations of weather variables to delay and provide coefficients for expected productivity losses. A complete case study comprising the construction of these maps and the associated sine waves for the UK is presented along with an example of their use in building construction planning. Findings of this study indicate that UK weather extends project durations by an average of 21%. However, using climatological data derived from weather observations when planning could lead to average reductions in project durations of 16%, with proportional reductions in indirect and overhead costs.  相似文献   

16.
蒋英 《山西建筑》2011,37(33):231-233
为了科学、客观地评价施工企业的绿色施工水平,从资源利用、环境负荷、施工企业综合管理三个方面,系统构建了住宅建设项目的绿色施工评价指标体系,基于绿色施工评价指标体系的模糊性特点,采用三级模糊综合评价模型进行评估,通过实例应用,验证了评价体系的有效性和适用性。  相似文献   

17.
在回顾项目风险度量传统方法的基础上,提出多维风险度量方法.该方法从风险事件的发生概率、风险损失、风险的不可预测性、风险的不可管理性、风险信息的不对称度等五个方面全面度量工程项目风险;并运用模糊集理论和专家调查法对风险事件各维度进行量化,对各维度进行算术平均和几何平均得到风险因素的风险值;进而评价项目的综合风险状况为决策...  相似文献   

18.
A construction project is unique, specific and dynamic, and therefore projects have different levels and combinations of risks, different responses are taken to minimise those risks and different consequences affect project performance. The primary aim of this study was to analyse the impacts of perceived project risk on project performance. A path model was developed and path analysis was used to determine the relationships between risk and performance. The main survey was predominantly based on a series of interviews with project managers. A total of 22 building projects under construction were surveyed; however, only 13 projects used an ‘S’ curve to monitor their project performance. The study focused on these 13 projects and found that perceived project risk had a direct negative effect on monthly progress achievement, while monthly progress had a direct positive impact on schedule performance. Although project risk had no direct effect on schedule performance, this was influenced indirectly with monthly progress as the mediator between them. These findings indicate that the higher the project risk in a project, the greater the negative impact on monthly progress, and consequently the worse the schedule performance will be.  相似文献   

19.
建筑工程施工质量模糊综合评定方法研究与应用   总被引:1,自引:0,他引:1  
张潞 《安徽建筑》2008,15(1):120-121
针对建筑工程施工质量评定具有的不明确特点,以及实际问题中决策定量的模糊性,文章运用模糊数学的基本方法,对建筑工程施工质量模糊综合评判问题进行探讨,提出一种建筑工程施工质量模糊综合评定方法,并应用到工程实例。研究表明,模糊综合评判方法为建筑工程施工质量评定提供了有效的理论基础。  相似文献   

20.
范志雨 《建筑施工》2022,44(1):208-211
为及时解决因工期延误导致的索赔分歧,发承包双方需要客观确定工程工期延误导致的承包商成本费用增加。基于房建工程主体结构工期延期进行分析,讨论了工期延期的4种基本情形(关键线路、非关键线路、降效及停滞),对各延期情形下承包商的直接工程费、措施费、间接费、规费及税金成本增加的计算方式进行了研究,分析了各项成本费用计算所涉及的要素,以及各要素对成本费用的量化影响,明确了各项费用具体的计算方法或者公式,指出各方应当正视工期延期问题的严重性,及时应对,妥善处理,才能减少工程参建各方因延期事件所遭受的损失。  相似文献   

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