Numerical Modeling of a Church Nave Wall Subjected to Differential Settlements: Soil-Structure Interaction,Time-Dependence and Sensitivity Analysis

ABSTRACT

Historic masonry structures are particularly sensitive to differential soil settlements. These settlements may be caused by deformable soil, shallow or inadequate foundation, structural additions in the building and changes in the underground water table due to the large-scale land use change in urban areas.

This paper deals with the numerical modeling of a church nave wall subjected to differential settlement caused by a combination of the above factors. The building in question, the church of Saint Jacob in Leuven, has suffered extensive damage caused by centuries-long settlement. A numerical simulation campaign is carried out in order to reproduce and interpret the cracking damage observed in the building.

The numerical analyses are based on material and soil property determination, the monitoring of settlement in the church over an extended period of time and soil-structure interaction. A sensitivity study is carried out, focused on the effect of material parameters on the response in terms of settlement magnitude and crack width and extent. Soil consolidation over time is considered through an analytical approach. The numerical results are compared with the in-situ observed damage and with an analytical damage prediction model.     

ENGINEERING SPATIAL FIXES: RELATIONAL SPATIAL PRACTICES,STRATEGIC‐TOPOLOGICAL APPROACH AND THE CONSTRUCTION OF A FINNISH SCIENCE‐TECHNOLOGY DISTRICT

It can be argued that the relational approach, and especially the so‐called relational economic geography, would benefit from deeper engagement with the practical and strategic dimensions of spatial relations. The article proposes a notion of engineering spatial fix as a way to conceptualize these dimensions. The idea is to widen the conceptual sphere of relationality from spontaneous ties or abstract networked power effects towards relational spatial practices. Theoretically, the article aims to bridge the strategic‐relational and the network‐topological approaches through a stylized meso‐level practice‐oriented approach. It is suggested that in economic geography, relations can be grasped through two basic perspectives: relations as analytical lenses and relations as spatial practices. The article proposes that the relational spatial practices can be divided into two dimensions: topological and strategic. The article presents a case study of a science‐technology district of Turku in 1985–2001, which fleshes out the theoretical elaborations. In the process, the relational concept of synergy is utilized as a context‐specific strategic resource as the district evolves from an initial separate building to a distinct and materialized geographical structure.     

城市舒适性视角下长春市创新产出的空间特征及影响因素

基于长春市2009—2018年专利授权数，以城市街道为创新产出基本分析单元，从城市舒适性视角探讨城市创新产出的空间格局及其影响因素。研究发现：2009—2018年长春市城市内部创新发展差异逐渐增大，局部区域相对均衡，整体呈现“西南集聚，东南分散”的空间特征；创新产出的空间单元数量逐渐增多，并形成“北低南高，四大核心”的空间格局；且伴随显著的高值集聚现象，企业、大学与研究机构的空间聚集性促进了知识溢出效应；城市舒适性对于长春市创新产出的空间集聚有一定影响，休闲舒适性因子与长春市创新产出的空间分布整体相关性较强。     

大都市中心区生产性服务业集群的空间溢出——以广州市天河区为例

空间溢出对产业集群形成发展具有重要意义。但空间溢出对生产性服务业集群的影响机制并不清楚。本文基于1 km×1 km网格和2013年广州市中心区--天河区的企业经济普查数据，采用空间数据分析技术，识别生产性服务业集群，分析集群特征，探测集群溢出类型。结果发现：①生产性服务业集群区位指向大城市中心区的核心地域，具有五种集群类型分异，空间呈不完全耦合。②生产性服务业集群空间规模受Jocobs型和MAR型两种溢出调控，在MAR型溢出作用下的集群空间规模相对较小。③信息服务业集群的溢出为负效应说明溢出作为一种潜在利益，在转化为集群优势的过程中存在过滤效应。     

Spatial interaction and security: a review and case study of the Syrian refugee crisis

ABSTRACT

Sir Alan Wilson's ideas have been highly influential in the modelling of phenomena including migration, transport and economics. Latterly, research has explored the application of similar ideas to new problems at larger scales. Many of these studies relate to global challenges with significant policy implications. Here, we present an example in the form of original empirical work concerning forced migration associated with the current Syrian refugee crisis. We employ a spatial interaction framework to examine the flows of migrants fleeing Syria and the characteristics which influence their choice of destination country. In line with the broader literature, we find that shorter distances, economic prosperity, and cultural similarity (e.g. shared language) attract forced migrants, as does the probability of being granted asylum; a finding with potential implications for policy. Contrary to expectation, we find little influence for levels of security in potential host nations (e.g. absence of terrorism).     

Integrating Local and Regional in Pre-Contact Hawaiian Agriculture at Kahuku,Hawai‘i Island

ABSTRACT

The agricultural systems of the Hawaiian archipelago were some of the most intensive in the Pacific and this scale of intensity is well illustrated by the large agricultural landscapes of leeward Hawai‘i Island. Previous research in the area has centred on understanding the relationship between agriculture, political process, and large-scale environmental conditions. Much of this research has been oriented at the regional level, privileging discussion of elite management and oversight, with only limited investigation exploring farmer-centric adaptation at local scales. In this paper, we assess the integration of local and regional processes in Hawaiian agriculture using recent paired archaeological and ecological data from the Ka‘ū Field System as a case study. We demonstrate the presence of both general patterns previously identified in the archipelago and particular adaptations to the local environment of Kahuku ahupua‘a. In particular, we highlight targeted infrastructural developments that allowed for cultivation of what would otherwise be a difficult cultivation medium within the confines of a larger, likely regionally organised, field system constrained by general soil biogeochemical thresholds. We argue that such investigations provide an increased understanding on how these large-scale agricultural landscapes were formed by integration at multiple social and spatial scales.     

行动者网络视角下江南水乡古镇空间演化路径——以周庄古镇为例

江南水乡古镇是江南地域社会经济活动的高度聚合体，而空间作为功能的载体，是古镇保护与发展中的关键一环。本文以周庄古镇为例，从行动者网络理论视角切入，解析不同旅游发展阶段古镇空间演化的行动者作用路径。研究发现，关键行动者意图、行动者网络结构的变化，推动了周庄古镇空间重构和演化。在观光旅游发展阶段，周庄镇政府为关键行动者，通过行政征召、专家带头征召等方式促成行动者网络的形成和发展，使古镇商业空间沿河街生长，文化体验空间呈团块状散布；在休闲度假转型阶段，市场力量开始发挥更大作用，行动者网络重新调整，进一步推动古镇商业空间网状渗透，文化体验空间条块衍生。本文认为古镇空间的实践建构应高度重视原住民这一行动者的作用。     

Identity,social interaction,and networks in the region of Wisconsin’s Holyland

ABSTRACT

This paper focuses on how a sense of identity, social interaction, and networks contribute to the construction and maintenance of regions. Using Wisconsin’s Holyland as a case study, we conducted fieldwork, collected primary data from residents through a survey, and utilized social network analysis (SNA) to determine how it is defined as a vernacular and functional region. While there appeared to be consensus regarding the key defining characteristics of Wisconsin’s Holyland on the surface, our data analysis revealed contrasting perceptions and definitions of the region. In addition, a SNA of self-reported social interactions by residents highlighted a complex cultural geography through the appearance of subregions and expanded borders of the region overall.     

公共服务视野下的城市空间正义问题——以山东省Q市为例

以山东省Q市为例，从公共服务满意度视角探讨城市空间正义问题及其作用路径。研究发现，近年来我国城市存在公共服务视野下明显的空间不正义问题，临近省市政府能享受更多、更好的公共服务，而区政府并不显著，且远离政府权力中心的边缘地带更加严重。不过，这种空间不正义问题更多源自省市政府权力的空间资源配置失衡，区政府没有足够话语权；主要在市辖区层面，街道尺度并不显著。受制于公共产品属性不同，不同公共服务的空间不正义问题有明显差异，弱排他性或弱竞争性的问题较小。另外，权力空间化通过公共产品配置数量和质量影响空间不正义问题，且质量层面远大于数量层面。新时代城市要从提高公共产品质量入手实现空间正义。     

Hazor rulership and ritual manipulation

ABSTRACT

Hazor was unquestionably the largest Bronze Age Canaanite site, standing as an anomaly in the southern Levant in terms of its size, elaborate public architecture, special geopolitical stature and far-reaching international networks. While the site has been well established as an urban center with many temples, the use of each of Hazor’s temples and how they relate to one another remains unclear. In this study, we analyze the rituals and other activities that were conducted within Hazor’s numerous temples. The methodology we employ stresses, fundamentally, the necessity to contextualize objects within entire assemblages – through spatial analysis – to most accurately assess how Hazor’s cultic spaces were actually used. We apply the same methodology to other MB and LB Canaanite temples to establish a generalized ideal-type temple assemblage for Canaanite temples. This study successfully demonstrates that Hazor’s temples substantially diverge from the ideal temple assemblage, indicating cult at Hazor was practiced differently than elsewhere in the region. This includes the atypical distribution of certain cultic vessels (e.g. miniature vessels), the appearance of special vessels in ritual contexts (e.g. cups), and a fundamentally different use of indoor and outdoor spaces when compared to other Canaanite temples. It turns out that Hazor’s elites were major factors controlling the anomalies of cultic practice at the site. Hazor’s rulers impacted cultic architectural forms and locations and played instrumental roles in dictating and manipulating the types of rituals and associated cultic paraphernalia that were allowed to be performed and used throughout the entire settlement landscape.