Shear Vulnerability of Historical Reinforced-Concrete Structures

Modern buildings have been characterized by the rapid spread of reinforced concrete as a novel and versatile building material. Within the assessment of existing buildings, the most sensitive structures are those designed in the first half of the 20th century, when the theory of reinforced concrete and the detailing rules were not yet well established. This study considers the issues related to the gradual understanding of the vulnerability at a territorial scale of structural typologies designed only for vertical loads. In particular, the shear behavior of the buildings in the period between 1920 and 1960 is investigated. The shear strength control of the structural elements of an open-air stadium in Southern Italy is carried on according to Eurocode 2, the American Concrete Institute Code, ACI 318R–2008, and a method based on Arslan’s equation. The results are compared with those included in the original calculus report according to the 1930 Royal Decree-Law (RDL 18/7/1930).     

Play Nice or Pick a Fight? Cooperation as an Interest Group Strategy at Implementation

The open, multilevel nature of U.S. policymaking enables interest group activity throughout the policy process. At policy implementation, groups attempt to secure benefits or ameliorate legislated effects by devising cooperative or conflictual strategies to influence outcomes, especially when agency officials have discretion to design rules and negotiate agreements. Investigating group “street‐level” activity with respect to the Endangered Species Act, this research finds that policy context and resources shape the degree of information and access available to groups, which influences the strategies groups adopt. Groups with access and specialized information will attempt to change or influence policy outcomes cooperatively. Groups with limited technical information are more likely to fight implementation.     

移民的行动抉择与网络依赖--对温州侨乡现象的社会学透视

有关温州侨乡的研究并不多,仅有的少数研究认为,温州侨乡之所以有那么多人不断地涌向海外,是因为那里存在着"炫耀消费"和"相对失落感".本文从社会网络依赖和行动选择两个层面来解释温州侨乡现象,认为温州侨乡之所以持续存在,是因为社会网络对行动路径的影响造成的,而炫耀性消费和相对失落感仅仅是表象.     

多情境下城市时空间行为的社会分异——以北京不同住房来源居民为例

近年来,居民时空间行为的社会分异已成为学者们广泛关注的话题。然而,已有关于居民时空间行为的社会分异研究中,缺少对于居民活动情境的社会分异的研究。因此,本研究基于时间地理学中对人类活动的情境嵌入性与情境的不同维度的相关理论,以北京清河街道为例,分析不同住房来源居民在日常情境、地理情境和社会情境下的时空间行为的社会分异,尝试从多个情境维度拓展对时空间行为社会分异的理解。研究发现,市场性住房居民“朝九晚五”的活动特征明显,活动同伴选择外向性突出;单位性住房居民职住相对接近,在社区空间内分配时间最长且活动目的多样;安置性住房居民活动较为分散,地理情境与社会情境都呈现出“家庭内向性”特征;保障性住房居民非工作活动的“滞后性”明显,对社区空间的时间分配总体较低。除住房来源因素与个人社会经济因素外,建成环境因素对于居民对社区空间的使用有显著影响。     

传统方法加固馆藏浮放文物抗震性能试验

为探索馆藏浮放文物的有效抗震加固方法,采用振动台试验手段,研究了传统方法加固浮放文物的抗震性能。基于故宫博物院某展柜原型尺寸,制作了1:1比例陈列柜模型。在陈列柜内浮放一轻质陶瓷文物,分别考虑采用砂子、塑料卡、鱼线、橡皮泥及磁铁加固文物,进行了振动台试验。通过白噪声激励,获得了陈列柜基频分布;通过输入不同强度、不同类型的地震波,获得了不同方法加固条件下陈列柜和文物的位移响应、加速度响应和和动力放大系数,评价了不同方法的加固效果。结果表明:陈列柜的基频与输入地震波相差较大,这是陈列柜震害不明显的主要原因之一;传统方法加固文物后,输入地震波的加速度仍有一定放大,但是与加固前文物相比,文物的位移和加速度响应均有所减小,且文物因摇晃幅度而产生倾覆的可能性减小。此外,从减小文物加速度响应峰值角度考虑,橡皮泥和鱼线加固文物效果优于其它方法。试验结果可为文物防震保护研究提供较全面的参考。     

河西走廊祁连山区牧户经济行为分析--以肃南县为例

牧户作为牧区生产与消费等经济行为的微观主体,是畜牧业以及牧区经济中最基本的决策单元。因此,牧户经济行为与畜牧业及牧区经济持续发展密切相关。通过对肃南县典型牧户经济行为的调查和分析,总结了祁连山河西走廊区牧户经济行为的特点,并运用已有的决策机制模型和经济学模型来分析牧户经济行为及牧户生产资投入与产出变化关系。最后根据得出的结论,对政府引导调控牧户经济行为提出了建议。     

城市居民休闲行为对娱乐业发展的影响研究——以成都为例

以分析城市居民休闲行为特征为切入点,探讨了居民的休闲行为对娱乐业发展所产生的影响。主要表现在四个方面:第一,休闲偏好、目的影响娱乐项目的发展类型。若居民休闲偏好、活动目的与娱乐项目发展类型关系密切,表明休闲产品的供给与市场需求呈匹配相关,有利于行业发展,反之,需要进行产品结构调整。其二,休闲频率、态度影响娱乐业发展规模和速度。休闲频率高,休闲者持积极参与态度的娱乐项目发展较快。第三,居民休闲消费水平影响娱乐业的档次结构配置,但因休闲项目不同应区别对待。第四,休闲活动出行范围与娱乐业空间布局彼此关联,互为影响因子。     

深圳商品住宅二级市场不规范行为及治理对策

深圳是房地产法律法规相对健全,市场发育相对成熟的地区。深圳房地产市场面临的问题,在国内有一定先行性和代表性。总结深圳房地产市场存在的问题,剖析其原因,提出治理对策,对国内其他城市和地区有一定指导和借鉴意义。本文利用2002年深圳市在售楼盘调查资料,归纳出了深圳商品住宅二级市场不规范行为的28种具体表现,揭示了相关制度不尽合理、开发商(中介商)存在投机心理、购房业主自我保护意识不强、管理部门监管难度大等原因,最后提出通过完善制度和加强管理予以规范和治理。     

Capitalism, cities, and the production of symbolic forms

A striking characteristic of contemporary capitalism is the increasing importance (in terms of growth, employment, revenue, etc.) of sectors whose outputs are imbued with significant cultural or symbolic content. Sectors of these sorts are predominantly, though not exclusively, located in large cities. I describe how these cities function as creative fields generating streams of both cultural and technological innovations. Post-Fordist cities are shown to be especially fertile terrains of commodified cultural production. A number of these cities have become major centres of image-producing industries such as film, music recording, or fashion clothing, and this phenomenon is also often associated with profound transformations of their physical landscapes. I argue that the economic foundations of these trends reside, in part, in the structural characteristics of image-producing industries, marked as they frequently are by modularized, network structures of production and a strong proclivity to geographic agglomeration. At the same time, the main centres of the contemporary cultural economy are caught up in insistent processes of globalization. I suggest that after an initial phase of product standardization and concentrated development in only a few major centres, the cultural economy of capitalism now appears to be entering a new phase marked by increasingly high levels of product differentiation and polycentric production sites. I also submit that the contemporary cultural economy of capitalism constitutes a historical shift beyond consumer society as such.     

城市娱乐场所感知空间研究

伴随城市社会、经济的快速发展,城市居民生活方式发生着深刻地变化。城市娱乐消费已逐渐成为大多数人们日常生活的重要方面,对于城市娱乐场所的研究越来越受到城市社会学和城市地理学等学者的重视。为促进城市空间结构和城市社会生活和谐发展,创造良好的城市生活质量,提升城市价值,本文立足于人文主义的角度,运用行为学和心理学的研究手段,以人文地理学的社区和场所体系为基础,全面探讨了居民对城市娱乐场所的空间感知。