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Celia Ojeda-Martínez Francisca Giménez Casalduero Just T. Bayle-Sempere Carmen Barbera Cebrián Carlos Valle Jose Luis Sanchez-Lizaso Aitor Forcada Pablo Sanchez-Jerez Pablo Martín-Sosa Jesús M. Falcón Fuensanta Salas Mariagrazia Graziano Renato Chemello Ben Stobart Pedro Cartagena Angel Pérez-Ruzafa Fréderic Vandeperre Elisabeth Rochel Serge Planes Alberto Brito 《Ocean & Coastal Management》2009,52(2):89-101
A general conceptual framework for the management of marine protected areas (MPAs) was developed. The driver-pressure-state-impacts-response (DPSIR) framework was used to determine the elements affecting MPAs. The developed evaluation framework helped to select an appropriate suite of indicators to support an ecosystem approach, an assessment of the MPAs functioning and policy decisions. Gaps derived from the management and policy responses in the MPAs were also outlined. It was concluded that the DPSIR framework can help to simplify the complexity of MPA management. This document is a tool for policy makers, scientists and general public on the relevance of indicators to monitor changes and MPAs management. 相似文献
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This article analyses the response of steel-moment resisting frames subjected to near-field ground motions. In near-field areas high damage and a relevant number of collapsed steel buildings arose even when both design and detailing had been performed in perfect accordance with the code provisions. These circumstances are related to the characteristics of the motion that in such areas shows large-amplitude pulses along the fault-normal component. The response of two steel moment resisting frames characterized by different stiffness levels and subjected to seven different accelerograms recorded in stations located in near-field areas is discussed in the following. The frames have been also analyzed by modelling the real behavior of semi-rigid joints between beams and columns and taking into account the presence of passive dampers (shear link devices). The non-linear dynamic analysis has been performed with the aim of acquiring a quantitative knowledge on the effects of near-field ground motions on frame buildings and on their damage. 相似文献
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The paper presents a numerical model for the analysis of the soil–structure kinematic interaction of single piles and pile groups embedded in layered soil deposits during seismic actions. A finite element model is considered for the pile group and the soil is assumed to be a Winkler‐type medium. The pile–soil–pile interaction and the radiation problem are accounted for by means of elastodynamic Green's functions. Condensation of the problem permits a consistent and straightforward derivation of both the impedance functions and the foundation input motion, which are necessary to perform the inertial soil–structure interaction analyses. The model proposed allows calculating the internal forces induced by soil–pile and pile‐to‐pile interactions. Comparisons with data available in literature are made to study the convergence and validate the model. An application to a realistic pile foundation is given to demonstrate the potential of the model to catch the dynamic behaviour of the soil–foundation system and the stress resultants in each pile. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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Roberto Graziano 《地学学报》2001,13(2):110-116
Huge megabreccias occur at the eastern margin of the Cretaceous Apulia Carbonate Platform (Gargano Promontory, southern Italy). Their stratigraphic and genetic meaning are controversial in the debated geological evolution of the Apulia Platform. New stratigraphic analyses have revealed that three distinct megabreccia levels occur within the coarse debrites that were previously interpreted to be the result of repeated collapses of a scalloped platform margin during the late Albian–Cenomanian. Each level has peculiar chronostratigraphic distribution, geometry, composition and genetic features. They are the Posta Manganaro Megabreccias (late early Aptian to late Albian pp. ), Monte S. Angelo Megabreccias (early–middle Cenomanian) and Belvedere di Ruggiano Megabreccias (middle Turonian). These deposits overlie regional, tectonically enhanced unconformities of late early Aptian, late Albian and late Cenomanian age. These megabreccias, which were formed, respectively, during drowning, prograding and exposure events of the Apulia Platform, reflect important turning points in its Cretaceous geodynamic evolution. 相似文献
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The relevant results of the study of more than 1700 Italian historical earthquakes from the year 1000 to 1982 are presented here. The research was carried out from 1983 to 1987 as part of a study promoted by ENEL (the National Electricity Board) for the seismic siting of nuclear power plants. A single coherent project has been developed, that involved 111 historical researchers who operated in 813 research centres in Italy and abroad. Problems such as the methods, research, analysis and interpretation of the numerous and various effects caused both by destructive and non-destructive earthquakes recorded in the historical sources, have been considered on a large scale for the first time. The earthquake records, collected in a data bank and interpreted according to a multi-disciplinary historical and seismological approach, have allowed the detailed reconstruction of the location and chronology of both individual and repeated events. This major research study has allowed us to evaluate the inexactness of the present Catalogue of Italian earthquakes in relation to the parameters of intensity, location and dating. From the synthesis of the results of the revision emerged sufficient information to value the reliability of the present Catalogue. TERRA Nova (1989) 1 , 151–162. 相似文献