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Showing 1 to 13 of 13 for “"seismic protection"”.
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Multi-axial Active Isolation for Seismic Protection of Buildings
… widely accepted as an effective means for the protection of structures against seismic hazards. Passive base isolation is one of the common structural control techniques used to enhance the performance of structures subjected to severe earthquake excitations. Isolation bearings employed at the …
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A New Visco-Plastic Device for Seismic Protection of Structures
A new visco-plastic damper for seismic protection is introduced. This device combines and enhances many of the proven characteristics of both displacement-dependent and velocity-dependent devices. The device consists of a block of a high-damping viscoelastic material sandwiched between two steel …
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Rolling-Ball Rubber-Layer system for the lightweight structures seismic protection: experimentation and numerical analyses
Protection of high-value building contents from seismic damage represents a worldwide challenging task. Artefacts, sophisticated medical and electrical equipment, high performance computer installations and other special contents have shown, in the last years, their high vulnerability both for high …
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Development, Analysis and Testing of a Hybrid Passive Control Device for Seismic Protection of Framed Structures
A new seismic protection strategy called the hybrid passive control device (HPCD) has been developed which combines typical passive energy dissipation devices. It consists of a high damping rubber (HDR) sandwich damper in series with a buckling restrained brace (BRB). The HPCD provides energy …
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Development of a Novel Controllable Seismic Isolation System Based on Negative Stiffness Concept
… the challenges underwent by traditional adaptive seismic negative stiffness devices (ASNSDs) and other base isolators to contribute new knowledge to the seismic protection field. Firstly, the beneficial effects of nonlinear damping and stiffness on seismic protection are investigated in the form …
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Decision making under epistemic uncertainty : an application to seismic design
… effects of these factors for the case of optimal seismic design of buildings. Results show that when temporal fluctuations in the epistemic uncertainty and regulatory safety constraints are included, the optimal level of seismic protection exceeds the normative level at the time of construction. …
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Structural performance evaluation and optimization through cyber-physical systems using substructure real-time hybrid simulation
… performance and achieve optimal designs for seismic protection. This dissertation presents systematic studies on the development and validation of the dynamic substructuring RTHS technique using shake tables, novel techniques in increasing RTHS stability by introducing artificial damping to …
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Nonlinear Dynamic Analysis of Structures with Hyperelastic Devices
… the effectiveness of hyperelastic bracing as a seismic protection device. Hyperelastic braces incorporate a new idea of a nonlinear elastic material that gains stiffness as the brace deforms. Structural behaviors of particular concern for an MDOF frame are stability, residual displacement, base …
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Damping optimization using transfer function criteria
Seismic performance has become a key point in the design of every type of structures. Even the simplest buildings need protection in areas of high seismic activity.However,there is no method defined!by codes or general knowledge to help engineers make choices about the design of seismic protection …
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Integrated Methodologies Based on Structural Health Monitoring for the Protection of Cutural Heritage Buildings
In the last decades the need for an effective seismic protection and vulnerability reduction of strategic structures and particularly the architectural heritage determined a growing interest in Structural Health Monitoring (SHM) as a measure of passive mitigation of earthquake effects. The object …
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Soil-Structure Interaction for low damage Seismic Rocking Systems
… even earthquakes of catastrophic potential. Seismic protection of structures by means of rocking isolation is becoming increasingly popular, since allowing uplift is an inexpensive way to reduce the damage demand placed in structures. However, understanding the role of soil–structure …
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The dynamic soil structure interaction of shallow foundations on dry sand beds
The design of shallow foundations located in seismically active zones typically takes a near zero tolerance approach to allowing relative movements between the foundation and underlying soil. This results in a rigid coupling of the foundation with the soil and hence the full transmission of the …
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Seismic risk mitigation of "special risk" process plants through enhanced concepts and subplant hybrid simulation
This doctoral thesis focuses on the seismic risk mitigation of â special riskâ industrial facilities, like chemical, petrochemical and process industries. It is known that the impact of natural hazards, such as earthquakes, on this type of structures may cause significant accidents leading to …