Simulation of Shake Table Tests on Out-of-Plane Masonry Buildings. Part (IV): Macro and Micro FEM Based Approaches

ABSTRACT

This article presents a study on the out-of-plane response of two masonry structures without box behavior tested in a shaking table. Two numerical approaches were defined for the evaluation, namely macro-modeling and simplified micro-modeling. As a first step of this study, static nonlinear analyses were performed for the macro models in order to assess the out-of-plane response of masonry structures due to incremental loading. For these analyses, mesh size and material model dependency was discussed. Subsequently, dynamic nonlinear analyses with time integration were carried out, aiming at evaluating the collapse mechanism and at comparing it to the experimental response. Finally, nonlinear static and dynamic analyses were also performed for the simplified micro models. It was observed that these numerical techniques correctly simulate the in-plane response. The collapse mechanism of the stone masonry model is in good agreement with the experimental response. However, there are some inconsistencies regarding the out-of-plane behavior of the brick masonry model, which required further validation.     

First absolute dating of Andean hunter-gatherer rock art paintings from North Central Chile

We report the first absolute dating for rock paintings by Andean hunter-gatherer groups. Analysis by Raman spectrometry of remains of black paintings from the center-north of Chile (30° lat. S) allows for the identification of carbon as the raw material. Radiocarbon dating situates these paintings between 1623–1431 BCE and 80–240 ACE, dates that are supported by other lines of independent evidence. These results are consistent with proposals that suggest the appearance and popularization of rock art in various places in the Andes for the temporal transect of 3000–1000 BCE. Finally, these new datings are added to the scant corpus of absolute dates for rock art that exist in South America.     

The Spatial Distribution of French Agricultural Cooperatives: An Exploratory Spatial Data Analysis

Abstract

This paper studies the spatial dynamics of French agricultural cooperatives using the recently developed exploratory spatial data analysis tool. Analysis at the level of French districts in 1995 and 2005 shows strong evidence for global and local spatial autocorrelations in the geographical distribution of agricultural cooperatives. The presence of spatial disparities between French districts is confirmed by the detection of such specific spatial patterns as district clusters, a group of neighbouring districts with the same high or low level of agricultural cooperative activities. A typology of all the different Regions is developed to examine the specific spatial patterns of the agricultural cooperative activities. The results indicate that major organizational changes in cooperatives do not significantly modify the initial dynamics concerning the location of activities.     

Interpartner Legitimacy Effects on Cluster Initiative Formation and Development Processes

In spite of the growing interest in cluster initiatives (CIs) as a means of regional development, there are still few studies of CIs that offer an inside perspective. This article takes such an inside perspective, focusing on the internal legitimacy aspects of the formation and evolving processes of CIs. We propose the inclusion of interpartner legitimacy effects in order to better understand the formation and development of CIs. A case study method is applied on a Swedish CI in the tourism industry. Faced with the situation that their region was lagging behind other Swedish regions in the development of tourism, the actors were spurred to promote a CI. Its central purposes were to consolidate the regional tourism industry, strengthen the regional brand and to establish the entire region as a single coherent destination. This paper contributes to the research body of regional development and CIs by showing how different types of interpartner legitimacies hinder and facilitate the CI process.     

Firm Performance,Innovation Modes and Territorial Embeddedness

This paper seeks to identify different innovation modes and their territorial embeddedness, relating them to firms’ innovative and economic performance. We also analyse the relationship between the different innovation modes and the economic impact of the crisis on firms’ performance. These relationships are tested by regression and latent class models for the Portuguese population of firms, using a sample of 397 firms classified according to technological intensity, size and region. Our results show three different innovation modes: a DUI (Doing, Using and Interacting) mode, an STI (Science, Technology and Innovation) mode and a TEI (Territorial Embeddedness Innovation) mode in which territory plays a key role. These innovative modes are related in different ways to firms’ economic and innovative performance and also have marked distinctions in terms of resilience to the economic crisis. These findings lead to a reflection on regional innovation policy in the European context.