Refine
Year of publication
Document Type
- Conference Proceeding (95)
- Article (31)
- Part of a Book (7)
- Book (3)
- Report (1)
- Talk (1)
Language
- English (138) (remove)
Keywords
- Earthquake (5)
- Seismic design (4)
- Out-of-plane load (3)
- Seismic loading (3)
- earthquakes (3)
- Adjacent buildings (2)
- Historical centres (2)
- INODIS (2)
- Masonry infill (2)
- Shake table test (2)
- Stone masonry (2)
- Tanks (2)
- industrial facilities (2)
- installations (2)
- piping (2)
- seismic design (2)
- seismic loading (2)
- Artificial intelligence (1)
- Behaviour factor q (1)
- Blind prediction competition (1)
- Capacity Curve (1)
- Cardiovascular MRI (1)
- Civil engineering (1)
- Components (1)
- Decoupling (1)
- Design examples (1)
- EN 1998-4 (1)
- ESHM20, industrial facilities (1)
- Earthquake Engineering (1)
- Emilia-Romagna earthquake (1)
- Empirical consequence curves (1)
- Empirical fragility functions (1)
- Eurocode 8 (1)
- Frame structure (1)
- Genetic algorithm (1)
- Gust wind response (1)
- INSYSME (1)
- In- plane damage (1)
- In-plane (1)
- In-plane load (1)
- In-plane performance, isolation (1)
- Industrial facilities (1)
- Industrial units (1)
- Infill wall design (1)
- Interaction (1)
- Isolation (1)
- Left ventriular function (1)
- Linear elastic analysis (1)
- MR-stethoscope (1)
- Magnetic field strength (1)
- Magnetic resonance imaging (MRI) (1)
- Masonry partition walls (1)
- Masonry structures (1)
- Modern constructions (1)
- Monte Carlo Tree Search (1)
- Multi-storey (1)
- Neo-Deterministic (1)
- Numerical modelling (1)
- Out-of-plane (1)
- Out-of-plane capacity (1)
- Out-of-plane failure (1)
- Out-of-plane strength (1)
- PBEE (1)
- Piping (1)
- Precast buildings (1)
- Pushover analysis (1)
- RC frames (1)
- Reinforced concrete frame (1)
- Response spectrum (1)
- Seismic (1)
- Seismic Hazard (1)
- Silos (1)
- Slab deflection (1)
- Spectral analysis (1)
- Structural design (1)
- Structural health monitoring (1)
- Tank (1)
- Unreinforced masonry buildings (1)
- Unreinforced masonry walls (1)
- Vulnerability Curves (1)
- Wind turbulence (1)
- Window opening (1)
- behaviour factor q (1)
- body limbs (1)
- cardiac gating (1)
- cardiovascular MR imaging (1)
- churches (1)
- connection detail (1)
- deserts (1)
- early warning and response system (1)
- earthquake (1)
- earthquake engineering (1)
- elastomeric bearing (1)
- electrocardiogram (1)
- equivalent stiffness (1)
- finite element method (1)
- fluid structure interaction (1)
- fragility curves (1)
- friction pendulum bearing (1)
- granular silo (1)
- high field MR imaging (1)
- hypoplasticity (1)
- impulsive effects (1)
- in-plane (1)
- in-plane and out-of-plane failure (1)
- integration SHM in BIM (1)
- interconnected sensor systems (1)
- linear elastic analysis; (1)
- liquid storage tank (1)
- liquid-storage tank (1)
- liquid-structure interaction (1)
- lizards (1)
- macro-element (1)
- magnetic resonance imaging (1)
- masonry structures (1)
- modern constructions (1)
- nonlinear transient analyses (1)
- out-of-plane (1)
- phonocardiogram (1)
- safety control (1)
- seismic hazard (1)
- seismic isolation (1)
- seismic response (1)
- seismic risk (1)
- seismic structural damage detection via SHM (1)
- seismic vulnerability (1)
- simplified approach (1)
- structure-soil-structure interaction (1)
- swimming (1)
- truss (1)
- unreinforced masonry buildings (1)
- vault (1)
- vocal fold oscillation (1)
Institute
Reinforced concrete (RC) frames with masonry infills are frequently used in seismic regions all over the world. Generally masonry infills are considered as nonstructural elements and thus are typically neglected in the design process. However, the observations made after strong earthquakes have shown that masonry infills can modify the dynamic behavior of the structure significantly. The consequences were total collapses of buildings and loss of human lives. This paper presents the new system INODIS (Innovative Decoupled Infill System) developed within the European research project INSYSME (Innovative Systems for Earthquake Resistant Masonry Enclosures in RC Buildings). INODIS decouples the frame and the masonry infill by means of special U-shaped rubbers placed in between frame and infill. The effectiveness of the system was investigated by means of full scale tests on RC frames with masonry infills subjected to in-plane and out-of-plane loading. Furthermore small specimen tests were conducted to determine material characteristics of the components and the resistances of the connections. Finally, a micromodel was developed to simulate the in-plane behavior of RC frames infilled with AAC blocks with and without installation of the INODIS system.
Silos generally work as storage structures between supply and demand for various goods, and their structural safety has long been of interest to the civil engineering profession. This is especially true for dynamically loaded silos, e.g., in case of seismic excitation. Particularly thin-walled cylindrical silos are highly vulnerable to seismic induced pressures, which can cause critical buckling phenomena of the silo shell. The analysis of silos can be carried out in two different ways. In the first, the seismic loading is modeled through statically equivalent loads acting on the shell. Alternatively, a time history analysis might be carried out, in which nonlinear phenomena due to the filling as well as the interaction between the shell and the granular material are taken into account. The paper presents a comparison of these approaches. The model used for the nonlinear time history analysis considers the granular material by means of the intergranular strain approach for hypoplasticity theory. The interaction effects between the granular material and the shell is represented by contact elements. Additionally, soil–structure interaction effects are taken into account.
The article presents the investigation of the seismic behaviour of a modern URM building located in the municipality of Finale Emilia in province of Modena, Northern Italy. The building is situated in the centre of the series of the 2012 Northern Italy earthquakes and has not suffered any damage during the earthquake series in 2012. The observed earthquake resistance of the building is compared with predicted resistances based on linear and nonlinear design approaches according to Eurocode. Furthermore, probabilistic analyses based on nonlinear calculation models taking into account scattering of the most relevant input parameters are carried out to identify their influence to the results and to derive fragility curves.
In recent years, many onshore wind turbines are erected in seismic active regions and on soils with poor load bearing capacity, where pile grids are inevitable to transfer the loads into the ground. In this contribution, a realistic multi pile grid is designed to analyze the dynamics of a wind turbine tower including frequency dependent soil-structure-interaction. It turns out that different foundations on varying soil configurations heavily influence the vibration response. While the vibration amplitude is mostly attenuated, certain unfavorable combinations of structure and soil parameters lead to amplification in the range of the system's natural frequencies. This testifies the need for overall dynamic analysis in the assessment of the dynamic stability and the holistic frequency tuning of the turbines.
The behaviour of infilled reinforced concrete frames under horizontal load has been widely investigated, both experimentally and numerically. Since experimental tests represent large investments, numerical simulations offer an efficient approach for a more comprehensive analysis. When RC frames with masonry infill walls are subjected to horizontal loading, their behaviour is highly non-linear after a certain limit, which makes their analysis quite difficult. The non-linear behaviour results from the complex inelastic material properties of the concrete, infill wall and conditions at the wall-frame interface. In order to investigate this non-linear behaviour in detail, a finite element model using a micro modelling approach is developed, which is able to predict the complex non-linear behaviour resulting from the different materials and their interaction. Concrete and bricks are represented by a non-linear material model, while each reinforcement bar is represented as an individual part installed in the concrete part and behaving elasto-plastically. Each brick is modelled individually and connected taking into account the non-linearity of a brick mortar interface. The same approach is followed using two finite element software packages and the results are compared with the experimental results. The numerical models show a good agreement with the experiments in predicting the overall behaviour, but also very good matching for strength capacity and drift. The results emphasize the quality and the valuable contribution of the numerical models for use in parametric studies, which are needed for the derivation of design recommendations for infilled frame structures.
The 2012 Emilia-Romagna earthquake, that mainly struck the homonymous Italian region provoking 28 casualties and damage to thousands of structures and infrastructures, is an exceptional source of information to question, investigate, and challenge the validity of seismic fragility functions and loss curves from an empirical standpoint. Among the most recent seismic events taking place in Europe, that of Emilia-Romagna is quite likely one of the best documented, not only in terms of experienced damages, but also for what concerns occurred losses and necessary reconstruction costs. In fact, in order to manage the compensations in a fair way both to citizens and business owners, soon after the seismic sequence, the regional administrative authority started (1) collecting damage and consequence-related data, (2) evaluating information sources and (3) taking care of the cross-checking of various reports. A specific database—so-called Sistema Informativo Gestione Europa (SFINGE)—was devoted to damaged business activities. As a result, 7 years after the seismic events, scientists can rely on a one-of-a-kind, vast and consistent database, containing information about (among other things): (1) buildings’ location and dimensions, (2) occurred structural damages, (3) experienced direct economic losses and (4) related reconstruction costs. The present work is focused on a specific data subset of SFINGE, whose elements are Long-Span-Beam buildings (mostly precast) deployed for business activities in industry, trade or agriculture. With the available set of data, empirical fragility functions, cost and loss ratio curves are elaborated, that may be included within existing Performance Based Earthquake Engineering assessment toolkits.
The chapter initially provides a summary of the contents of Eurocode 8, its aim being to offer both to the students and to practising engineers an easy introduction into the calculation and dimensioning procedures of this earthquake code. Specifically, the general rules for earthquake-resistant structures, the definition of design response spectra taking behaviour and importance factors into account, the application of linear and non-linear calculation methods and the structural safety verifications at the serviceability and ultimate limit state are presented. The application of linear and non-linear calculation methods and corresponding seismic design rules is demonstrated on practical examples for reinforced concrete, steel and masonry buildings. Furthermore, the seismic assessment of existing buildings is discussed and illustrated on the example of a typical historical masonry building in Italy. The examples are worked out in detail and each step of the design process, from the preliminary analysis to the final design, is explained in detail.
Industrial units consist of the primary load-carrying structure and various process engineering components, the latter being by far the most important in financial terms. In addition, supply structures such as free-standing tanks and silos are usually required for each plant to ensure the supply of material and product storage. Thus, for the earthquake-proof design of industrial plants, design and construction rules are required for the primary structures, the secondary structures and the supply structures. Within the framework of these rules, possible interactions of primary and secondary structures must also be taken into account. Importance factors are used in seismic design in order to take into account the usually higher risk potential of an industrial unit compared to conventional building structures. Industrial facilities must be able to withstand seismic actions because of possibly wide-ranging damage consequences in addition to losses due to production standstill and the destruction of valuable equipment. The chapter presents an integrated concept for the seismic design of industrial units based on current seismic standards and the latest research results. Special attention is devoted to the seismic design of steel thin-walled silos and tank structures.