نتایج جستجو برای: seismic evaluation

تعداد نتایج: 858997  

Journal: :Journal of Structural Engineering 1991

2009
Rui Pinho Helen Crowley

The period of vibration is a fundamental parameter in the force-based design of structures as this parameter defines the spectral acceleration and thus the base shear force to which the building should be designed. This paper takes a critical look at the way in which seismic design codes around the world have allowed the designer to estimate the period of vibration for use in both linear static...

Since the structure and foundation are built on soil, the soil is the major platform by which seismic vibrations are transmitted to the structure, and has noticeable effects on the response and behavior of structure during earthquakes. In this research, the recently introduced Performance-based plastic design (PBPD) and its modified Performance-based plastic design (MPBPD) method in which soil ...

Journal: :Journal of numerical methods in civil engineering 2022

Evaluation of the seismic performance isolated electrical transformers under pulse-like excitations

H Kazem S Mehrpouya,

Cylindrical steel tanks are important components of many industrial plants such as oil refineries and chemical plants. Usually failure of cylindrical tanks leads to serious consequences. During the past earthquakes such as 1964 Alaska and 1999 Turkey seismic performance of cylindrical tanks revealed that tanks are seismically vulnerable. Therefore, evaluation of seismic performance of these str...

2016
J. F. Silva Gomes Panagiotis G. Asteris Panagiotis Karakitsios Maria Douvika Petros Moundoulas Maria Apostolopoulou Antonia Moropoulou

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...

Journal: :نشریه مهندسی عمران و نقشه برداری 0
حبیب سامی دانشگاه تهران سیدمهدی زهرائی دانشگاه تهران

in this paper, acceptance criteria of steel building code, comprehensive and quick evaluation procedures for x-bracing, are compared to each other parametrically and numerically. for this purpose, it is assumed first that the sample building is designed to meet steel building code and then by introducing transform parameters and using stress ratio of the designed components, acceptance of the d...

Journal: :journal of rehabilitation in civil engineering 2014
hamed arshadi ramezan ali izadifard homayun estekanchi

endurance time (et) method is a relatively new performance-based earthquake method for structural evaluation and design. in this method, the structure is subjected to a gradually intensifying accelorogram(s) and its performance is assessed based on the maximum time duration that it can meet the specified performance objectives. using moment-resisting and braced frames which are rehabilitated by...

Journal: :Advances in Engineering Software 2008
C. Cuadra M. B. Karkee K. Tokeshi

The citadel of Machupicchu is probably the most famous Inca heritage site in Peru. Considering the seismically active region, this research is an attempt to perform a seismic risk analysis of the heritage structures at Machupicchu. A systematic approach is adopted for this purpose. Characteristic seismicity of the region, where these historical constructions are located, is discussed based on t...

2004
Kees Wapenaar Deyan Draganov Joost van der Neut Jan Thorbecke

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...

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