建筑幕墙层间变形性能检测技术(三维)研究

通过对新国标《建筑幕墙层间变形性能分级及检测方法》及美国标准中的层间位移性能测试的分析,对建筑幕墙层间变形性能检测设备进行了设计、研究,并制定出一套完善的建筑幕墙层间变形性能试验方法。     

Characterization of Air Gaps and Their Impact on the Thermal Insulation Performance of Multi-layer Firefighter Clothing

Fire Technology - Quantitative evaluation of the thickness of the air gap that forms at every location of the human body when wearing firefighter clothing is important for understanding the thermal...     

The architecture of the (post) studio: Jackson Pollock’s barn and Andy Warhol’s Silver Factory

This article will discuss a false dichotomy between two models, the modern art studio and the post-studio, which oppose the private and the public, the individual and the collective, hiding and the revealing. We will begin by analysing Daniel Buren’s position in his canonical text “Fonction de l’Atelier” and his practice, where the artist defines the foundations of post-studio work. As the text also describes a New York studio type that must be left behind, we will analyse Jackson Pollock’s and Andy Warhol’s workspaces through drawing reconstructions to demonstrate that these meet the defining characteristics of both models. It will be shown that the artists have used design strategies to retain certain aspects of studio culture while exploring others of the post-studio. This turning point reveals that the current belief about the obsolescence of the studio in a global era defined by communication, networking and mobility ignores its emerging post-studio qualities. This work aims to acknowledge this shift, obtaining a critical vision that will allow us to design contemporary workspaces avoiding stereotypical and reductionist approaches.     

长距离渗透喷射式布袋风管送风均匀性实验研究

通过理论计算和实验研究,分别计算和测试了长度120 m渗透喷射式布袋风管内部动静压的分布,各管段的总送风量,孔口送风量和渗透送风量,在此基础上分析送风量不均匀度沿风管的变化规律.实验结果表明,在进口风速13.5 m/s,10.0 m/s和6.8 m/s三个工况下,进口风速为10.0 m/s时风管内沿程静压分布较稳定,静...     

关于大掺量粉煤灰混凝土含气量、气泡参数表征抗冻能力相关性的探讨

鉴于冻融作用对大掺量粉煤灰混凝土(High Fly ash Content Concrete,HFCC)造成的破坏较为严重,对国内外的研究情况进行了分析,总结了现阶段大掺量粉煤灰混凝土抗冻性能的研究进展。主要对混凝土拌合物含气量和硬化混凝土气泡参数表征HFCC抗冻性的科学性和可行性进行了分析,并且对二者的相关性进行探讨。     

空调器性能实验室气流组织设计优化分析

气流组织设计是设计空调器性能实验室的核心之一,在研究空调器性能实验室气流组织设计的基础上,建立相应的数学及物理模型,划分相应的网格结构,运用CFD软件进行模拟,采用导流板来减少旋流的产生,与不加导流板所产生的空调器性能试验室内流场分布进行对比,发现设置导流板的静压室内气流更加平稳。同时模拟导流板放置不同位置时周围流场的变化,寻找较优导流板的放置位置,达到减少旋流的影响、使实验室工作区气压更加均匀的目的,从而使空调器性能测试实验结果更加准确可靠。     

防空地下室顶板底高出室外地面问题浅析

通过现行设计规范以及理论分析,对防空地下室顶板与室外地面关系进行探讨,槔出防牢地下室顶板板底高出宰外地面的处理力法。     

The impacts of rural–urban migrants’ remittances on the urban economy

Much literature finds that migrants’ remittances have positive effects on the labor-outsourcing regions; however, it should be noted that the massive funds outflow from the labor host regions poses an impact on these regions as well. Moreover, the existing literature sheds little light on the theoretical study of remittances within one economy. This article theoretically analyzes the economic impact of migrants’ remittances on the labor host regions, the urban regions, and establishes a three-sector general equilibrium model to investigate the impacts of an increase in remittances on wage, employment and welfare level in the urban regions from the short- and long-term perspectives. We find that an increase in remittances will reduce the output of the informal sector and decrease urban residents’ welfare in the short term, while it will increase the output of the informal sector and augment urban residents’ welfare in the long term.     

Covenant Cloaks: Mormon Temple Garments in the Light of Identity Theory

It is argued that Mormon temple garments reveal something of the process whereby religious identity receives reinforcement and protection through the stabilizing effects of material symbols. Such symbols are often described as “boundaries” or “boundary markers.” In the case of Latter-Day Saints’ ritual clothing, however, this essay contends that identity is more often reinforced in relation to the religious community; the garments create cultural meaning and communicate between insiders. This clothing, then, displays many of the hallmarks of the identity theory adumbrated in the mid-twentieth century by sociologist Hans Mol. Mol suggested that identity is the stable half of a stability/adaptability dialectic, and religion is the sacralization of that identity. This paper explores Mormon temple garments as material mechanisms of stabilization, the efficacy of which is to be found in their capacity to anchor emotions, behaviors, and (ultimately) identity in social “covenants.” This social cohesion is bolstered by the immutability of the temple garment as an identity generator. Thus, it is argued that Mol’s concept of religious identity illuminates at least one attribute of Mormon ritual dress—namely, its identity-conferring potential. Hidden beneath conventional clothing, these garments serve less as boundary markers and more as signifiers of conformity to a social ideal.     

The Tree at the Center of Collapse: ‘Ōhi‘a Lehua and Hawaii’s Future

Hawaii is on the threshold of collapse. Over a century of American colonization and exploitation of the islands and their people has resulted in the island chain facing critical environmental and cultural catastrophe. This article examines the emergence of Rapid ‘Ōhi‘a Death as a critical aeolian pathogen capable of wiping out the most culturally and ecologically significant species representing over 50% of Hawaii’s forests. Plantation histories are unpacked as foundational tools which directly led to deep alteration to the cultural fabric and landscape of the islands, accelerating the complex issues faced by Hawaii and Hawaiians today. This crisis offers landscape architects and the design professions grounds for a new methodology to approach both ecological and cultural issues as one to tackle the issues stemming from ongoing climate change. Furthermore, the article underscores the need to rethink the American fetishization of the Hawaiian Islands and look instead to how land stewardship and landscape practices can facilitate a self-determinant, equitable, and resilient future.     

送风量对渗透式纤维空气分布系统送风特性影响的实验研究

采用现场实验的方法研究了送风量对渗透式纤维空气分布系统送风时表面空气流速和纤维空气分布系统空腔内部轴向空气压力分布的影响。实验结果表明：送风量对渗透式纤维空气分布系统对空气的“自整流”作用影响较小,与空气渗透流速大小成线形关系。随着送风量的增加,渗透式纤维空气分布系统空腔内部空气总压和静压值逐渐增加,静压增加梯度和动压衰减梯度越来越大,末端处静压复得现象愈明显。研究结果可为相应的数值模拟及工程设计提供参考。     

木结构房屋的抗震性能及保护措施

从木结构房屋的构造形式特点出发 ,研究了不同烈度地震作用下木结构房屋的震害特点 ,并以西安回民保护区典型木结构房屋为例 ,按 8度抗震设防考虑 ,分别对木结构房屋的纵向、横向进行了内力分析和承载力计算 ,并利用通用有限元程序ANSYS对木结构房屋进行了三维空间分析。通过平面与空间的计算 ,指出木结构房屋抗震存在的问题 ,讨论了对木结构房屋应采取的抗震保护措施     

变风量空调系统中最小总送风量控制探究

变风量空调系统在国外的一些发达国家使用的历史已经有五、六十年之久了,其应用广泛,技术成熟。变风量空调系统的控制方式曾大多采用定静压控制,本文对定静压与最小总送风量控制方式在几个方面进行了比较,使得大家对最小总送风量控制方式有一个简单的了解。     

New Approaches to Evaluate the Performance of Firefighter Protective Clothing Materials

This paper presents new proposals in the evaluation and determination of the optimum materials suitable for use in the design and development of firefighter protective clothing by simultaneously addressing the conflicting factors of thermal protection [heat transfer index (HTI), radiant heat transfer index (RHTI) and thermal threshold index (TTI)] and anti-heat stress [water vapor resistance (WVR) and total heat loss (THL)]. To achieve this, this paper proposes new indices for the materials, two types of “total performance” indices, which are defined as the sum and the product of the competing factors of thermal protection and anti-heat stress. The results showed that the candidate materials of firefighter protective clothing were easily rated when the new indices were applied. Of five candidate materials viz. A, B, B₁, B₂ and C, the B sample, with values for HTI₂₄?=?13.2?±?0.2 s, RHTI₂₄?=?18.0?±?0.8 s, TTI?=?1132?±?33 J/m², WVR?=?17.5?±?0.3 m² Pa/W and THL?=?266.2?±?4.1 W/m², was found to exhibit the best total performance. However, the methods proposed to the scientific community in this paper have so far been validated on a limited data set only, and will require further validation by a wider group of researchers and with more samples. Lastly, comments on ISO 11999-3:2015 were also made for the further improvement and development of technical standards.     

Assessment of Factors Affecting the Continuing Performance of Firefighters’ Protective Clothing: A Literature Review

There has been some research into the level of damage and changes to important properties of firefighters’ protective clothing after exposure to conditions such as elevated temperature and ultra violet radiation. However, at this time, the results are not comprehensive enough to develop a standard procedure to estimate the remaining useful life of firefighters’ protective clothing. There is also a need to develop non-destructive techniques to evaluate clothing, for most tests used to evaluate properties of clothing are destructive, and visual cues cannot completely assess the level of deterioration of the properties of thermal protective fabrics. In this paper, major factors that affect the continuing performance of firefighters’ protective clothing and their effects on the service life of the clothing are reviewed. Some non-destructive methods which have been employed in different studies to evaluate the degradation of physical properties of firefighters’ protective clothing are also described, along with statistical and probabilistic methods for estimating the useful life of materials. Suggestions for future research, which will assist fire departments in determining the level of damage to clothing, and estimating its remaining useful life are also discussed.     

浅议高层建筑转换层施工中的关键技术环节

近年来,我国城市人口不断增多,城市的规模不断扩大,随之衍生出很多的社会问题。面对日益增加的城市人口,城市如何解决居民住房问题变得越来越迫切。其中最有效的解决方法之一,就是增加高层建筑的数量,这对转换层施工技术是一次考验。     

浅议高层建筑转换层施工中的关键技术环节

近年来,我国城市人口不断增多,城市的规模不断扩大,随之衍生出很多的社会问题。面对日益增加的城市人口,城市如何解决居民住房问题变得越来越迫切。其中最有效的解决方法之一,就是增加高层建筑的数量,这对转换层施工技术是一次考验。     

二灰碎石基层材料力学性能与路用性能相关性研究

本文对某高速公路二灰碎石基层材料的无侧限抗压强度、抗压回弹模量、间接抗拉强度以及底基层的无侧限抗压强度与裂缝度、车辙面积率、修补面积率以及PCI进行了相关性分析,发现其相关性较为良好。