the direct way to access the petrophysical property of hydrocarbon reservoir is based on well data but due to its high cost, the seismic data has been used to obtain these parameters. for this purpose, many different methods are available and each has its own advantages and limitations. from these methods the seismic inversion is the best tool to study the reservoir characterization. the outcom...

Vibration attenuation to horizontal propagating waves by using periodic foundations is investigation. Periodic structure theory is introduced to design a new type of isolation foundations, which has a special frequency band gaps (or ‘attenuation zones’) that can barrier waves/vibrations propagation. Materials usually used in civil engineering are used to fabric periodic foundations with the uni...

In this paper an optimization framework is presented for automated performance-based seismic design of bridges consisting of multi-column RC pier substructures. The beneficial effects of fusing components on seismic performance of the quasi-isolated system is duly addressed in analysis and design. The proposed method is based on a two-step structural analysis consisting of a linear modal dynami...

Hybrid control system composed of a base isolation system and a magneto-rheological damper so-called smart base isolation is one of effective semi-active control system in controlling the seismic response of structures. In this paper, a design method is proposed for designing the smart base isolation system in order to achieve an effective performance under multiple earthquakes. The base mass, ...

Interferometric gravitational wave detection relies on precisely monitoring the distance between the test masses at the end of each arm which, conveniently, also serve as the end mirrors of the interferometer. For terrestrial detectors, this measurement is corrupted by seismic noise that is several orders of magnitude larger than the anticipated gravitational wave induced motion [1]. To reduce ...

An experimental program has been completed recently to evaluate the long-term performance of the seismic isolation bearings manufactured for the Foothill Communities Law and Justice Center. Two pairs of full-size bearings were tested — one was removed from the building approximately 12 years after installation, and the other pair was from the original set of 4 prototype bearings. This article s...

In this study, the adaptability of a semi-active top-story isolation system with an MR damper for reduction of seismic responses of tall buildings has been investigated. To this end, a 20-story building structure was selected as an example. Low damping elastomeric bearings and an MR damper were used to compose a smart top-story isolation system. Artificial earthquakes generated based on design ...