Structural and operational management of Turkish airports: a bootstrap data envelopment analysis of efficiency

This paper explores the structural and operational dimensions of the efficiencies of airports. The two-stage procedure is suggested to assess the efficiencies of airports in this study. In the first-stage, Classification and Regression Tree, which is one of the machine-learning approaches used to divide the airports into homogeneous and thus comparable sub-groups. In the second stage, the bootstrap data envelopment analysis approach obtains more precise structural and operational efficiency scores. To illustrate the proposed framework use, we applied it to a real case associated with Turkish airports. The results demonstrate that this framework presents a more comprehensive assessment of airport performance rather than conventional data envelopment analysis models. Moreover, it provides to show the deficiencies of the structural and operational management of airports. The findings can help anywhere airport authorities as well as Turkish airport authorities.     

西宁曹家堡机场T2航站楼钢结构安装技术

西宁曹家堡机场T2航站楼钢结构工程具有气候环境恶劣、现场条件极为有限、桁架结构复杂、倾斜钢柱安装难度大、结构稳定性差等特点.根据工程总体施工计划和工程特点,屋盖钢结构采用分段拼装、原位安装的施工方案.重点介绍了起重机械配置方案、支撑格构架设计方案、钢柱和桁架的吊装方案、测量控制方案.实践证明,所采取方案保证了桁架安装满足要求.     

贵阳龙洞堡国际机场T2航站楼钢结构安装技术

贵阳龙洞堡国际机场T2航站楼屋架钢结构为大跨度曲面空间网架结构,结构中部采用复杂的四叉树形柱,两侧为Y形柱,柱顶采用抗震向心关节轴承连接节点,结构形式复杂,技术要求高,施工难度大.根据工程结构特点及现场条件,网架屋盖采用滑移脚手架和局部满堂架相结合的高空散装方案.重点介绍了大跨度曲面空间结构安装精度控制措施、滑移脚手架的应用等施工工艺及通过施工过程一体化分析建造技术确定空间复杂结构最优施工方案的应用.     

封锁机场多模弹药反排策略与对抗特性分析

提出了多模弹型,对抗模式、反排策略的概念,研究了多模弹药以排策略,对抗模式和基本起爆方式之间的关系,提出了用反排概率表示多模弹药反排对抗特性的方法,在一定的假设条件下,导出了多模弹药反排概率的表达式并进行了讨论。     

Owner-dominated building information modeling and lean construction in a megaproject

The integration of building information modeling (BIM) and lean construction (LC) provides a solution for the management of megaprojects. Previous studies have generally focused on the theoretical or empirical adoption of BIM and LC. Moreover, only a few studies have examined the approach of simultaneously using BIM and LC in megaprojects. Therefore, an intensive study on the application of BIM and LC in megaprojects, particularly to explore considerably effective integrated application modes of BIM and LC in megaprojects, will substantially promote the management efficiency of megaprojects. The current study describes a method that integrates owner-dominated BIM and LC that was developed in a case study. The proposed method provides a framework for all stakeholders to use BIM and LC in a megaproject dominated by the owner. The interactional relations among the owner, BIM, and LC were analyzed and positive interactions were identified. These positive interactions served as a basis for the implementation of this integrated approach in a case study and could be applied to other megaprojects. The megaproject (i.e., airport construction project) was examined to verify the performance of the developed method. Results showed that the integration of BIM and LC dominated by the owner can improve management performance and achieve high quality standard.     

大型机场航站楼设计要义探究

随着中国民航业的高速发展,近十多年来国内建成了一批大型机场航站楼,它们各具特点,同时也有着很多共同的目标和追求。通过横向比较,本文尝试从航站楼基本构型设计、高效快捷的航站楼建筑主题、大型机场的枢纽功能、机场陆侧交通设计、航站楼商业开发和人性化服务设施、航站楼内外部空间设计等几个方面,对大型机场航站楼的设计要点进行一些概要的分析和归纳。     

温州永强机场新建航站楼项目主楼钢屋盖施工技术

温州永强机场新建航站楼项目主楼钢屋盖结构为网架结构,中部带有天窗张弦结构,本工程主楼钢屋盖投影面积达3.06万m2,采用地面分区拼装、合龙后整体提升、计算机同步控制、高空补缺的施工方案。从结构特点、安装重难点、钢结构的拼装及安装技术、施工监测、施工仿真模拟等方面进行了全面剖析。     

民用运输机场绿色照明设计

阐述了绿色照明的基本概念。对民用运输机场中的绿色照明设计进行了探讨,包括选择合理的照度标准。利用太阳能及LED节能光源,采用智能照明控制系统等措施。使机场照明用电真正达到绿色、节能目标。     

Consensor技术在深圳机场T3航站楼混凝土质量控制中的应用

结合深圳T3航站楼工程,探讨钢筋配置对不同龄期混凝土电导率的影响。基于试验分析,获得不同龄期混凝土电导率、介电常数及混凝土强度的关系,建立混凝土强度发展与电介质参数的数学模型。混凝土构件施工现场测试表明,利用Consensor技术能够有效实时获取表层混凝土早期强度,是一种现场质量控制的快速、简便的技术手段。     

深圳机场T3航站楼预应力混凝土梁施工过程模拟

采用有限元分析方法,对深圳机场T3航站楼18m预应力梁的施工及变形过程进行数值模拟。考虑到混凝土材料特性随时间变化的影响,同时考虑了如板、次梁、柱的相关影响,将混凝土从筑注开始至完成拆模分为4个阶段。并对施工过程进行模拟,得出各阶段各测点的变形情况。结果表明各阶段模拟结果较为合理,为顺利施工提供依据。