نتایج جستجو برای: seismic pounding
تعداد نتایج: 37114 فیلتر نتایج به سال:
Masonry structures are complex systems that require a thorough and detailed knowledge and information regarding their behaviour under seismic excitations. Appropriate modelling of a masonry structure is a prerequisite for a reliable earthquake resistant design or assessment. However, modelling a real structure to a robust quantitative (mathematical) representation is a very difficult, complex a...
We discuss three approaches to seismic interferometry and compare their underlying assumptions. In the first approach the reflection response is reconstructed by cross-correlating the responses of many uncorrelated noise sources. In the second approach a depth image is obtained from the response of a single source, recorded by many receivers. In the third approach the Green’s function is recons...
Time-lapse (4D) seismic data sets have proven to be extremely useful for reservoir monitoring. Seismic-derived impedance estimates are commonly used as a 4D attribute to constrain updates to reservoir fluid flow models. However, 4D seismic estimates of P-wave impedance can contain significant errors associated with the effects of seismic noise and the inherent instability of inverse methods. Th...
CONTEXT Many patients have palpitations and seek advice from general practitioners. Differentiating benign causes from those resulting from clinically significant cardiac arrhythmia can be challenging and the clinical examination may aid in this process. OBJECTIVE To systematically review the accuracy of historical features, physical examination, and cardiac testing for the diagnosis of cardi...
Abstract The seismic evaluation of masonry buildings in aggregate, largely diffused within the existing Italian and European building stock, represents a difficult open task that has not been exhaustively investigated so far. study proposes procedure aimed at evaluating potential impact combination local mechanisms site-amplification terms fragility curves on an unreinforced (URM) aggregate whi...
This paper deals with the design of seismic rehabilitation a case-study building located in Florence, Italy. The particular reinforced concrete hosts an important operational center main company that manages Italian highway network. It is composed juxtaposition three edifices standing out from common basement. interventions for this case study posed different challenges, some even contrast each...
Continuous rigid-frame bridges (CRFBs) have been widely constructed in high seismicity areas western China. To investigate the seismic response characteristics and whiplash effect mechanism of CRFBs under near-fault ground motions, a long-span CRFB with piers is selected as prototype bridge, nonlinear finite element model developed based on OpenSees. Three groups namely having forward-directivi...
Coda-wave interferometry is a technique to detect small seismic velocity changes using phase changes in similar waveforms from repeating natural or artificial sources. Seismic interferometry is another technique for detecting seismic velocity changes from cross-correlation functions of ambient seismic noise. We simultaneously use these two techniques to clarify seismic velocity changes at Sakur...
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