Development and Realization of Base Isolation System for High-Rise Buildings

Abstract Various studies have been carried out to evaluate the feasibility and effectiveness of the story isolation system. The results obtained are also quite impressive, where the story isolation system gave a better story drift reduction than the base isolation system. However, these studies only focused on low-rise buildings, even though the story isolation system will be more engaging if it could also be compatible with high-rise buildings. In this study, a numerical analysis will be carried out on 30-, 40-, 50-, and 60-story buildings to evaluate the story isolator’s location, so that the system gives an optimum reduction of story drift and story shear. Then a general solution is sought to become a reference for buildings with different plans and heights. Keywords: Story isolation system, story isolator optimum location, high-rise building. Abstract Berbagai penelitian telah dilakukan untuk mengevaluasi kelayakan dan efektivitas sistem isolasi tingkat. Hasil yang diperoleh juga cukup mengesankan, dimana sistem isolasi tingkat memberikan reduksi simpangan antar tingkat yang lebih baik dibandingkan dengan sistem isolasi dasar. Namun, studi tersebut hanya berfokus pada bangunan bertingkat rendah, padahal sistem isolasi lantai akan lebih menarik jika dapat juga digunakan pada bangunan bertingkat tinggi. Dalam studi ini, analisis numerik akan dilakukan pada bangunan berlantai 30, 40, 50, dan 60 untuk mengevaluasi lokasi isolator tingkat yang memberikan reduksi simpangan tingkat dan geser tingkat terbesar. Kemudian dicari solusi umum untuk menjadi acuan untuk bangunan dengan denah dan ketinggian yang berbeda. Kata kunci: Sistem isolasi tingkat, lokasi optimum isolator tingkat, bangunan bertingkat tinggi.

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Telescopic columns as a new base isolation system for vibration control of high-rise buildings

Earthquakes and Structures ◽

10.12989/eas.2012.3.6.853 ◽

2012 ◽

Vol 3 (6) ◽

pp. 853-867 ◽

Cited By ~ 11

Author(s):

Mahmood Hosseini ◽

Ehsan Noroozinejad Farsangi

Keyword(s):

Vibration Control ◽

Base Isolation ◽

Isolation System ◽

High Rise ◽

Base Isolation System

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A base isolation system for bridges subjected to seismic disturbances

Earthquake Engineering & Structural Dynamics ◽

10.1002/eqe.140 ◽

2002 ◽

Vol 31 (5) ◽

pp. 1093-1112 ◽

Cited By ~ 2

Author(s):

H. Kaplan ◽

A. Seireg

Keyword(s):

Base Isolation ◽

Isolation System ◽

Base Isolation System

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Influence of Elastomeric Bearings in Tension on the Seismic Performance of Base-Isolated r.c. Buildings

Applied Sciences ◽

10.3390/app11010082 ◽

2020 ◽

Vol 11 (1) ◽

pp. 82

Author(s):

Fabio Mazza ◽

Mirko Mazza

Keyword(s):

Base Isolation ◽

Nonlinear Models ◽

Vertical Component ◽

Computer Code ◽

Nonlinear Phenomena ◽

Isolation System ◽

Elastomeric Bearings ◽

Near Fault ◽

Base Isolation System ◽

Near Fault Earthquakes

Elastomeric bearings are commonly used in base-isolation systems to protect the structures from earthquake damages. Their design is usually developed by using nonlinear models where only the effects of shear and compressive loads are considered, but uncertainties still remain about consequences of the tensile loads produced by severe earthquakes like the near-fault ones. The present work aims to highlight the relapses of tension on the response of bearings and superstructure. To this end, three-, seven- and ten-storey r.c. framed buildings are designed in line with the current Italian seismic code, with a base-isolation system constituted of High-Damping-Rubber Bearings (HDRBs) designed for three values of the ratio between the vertical and horizontal stiffnesses. Experimental and analytical results available in literature are used to propose a unified nonlinear model of the HDRBs, including cavitation and post-cavitation of the elastomer. Nonlinear incremental dynamic analyses of the test structures are carried out using a homemade computer code, where other models of HDRBs considering only some nonlinear phenomena are implemented. Near-fault earthquakes with comparable horizontal and vertical components, prevailing horizontal component and prevailing vertical component are considered as seismic input. Numerical results highlight that a precautionary estimation of response parameters of the HDRBs is attained referring to the proposed model, while its effects on the nonlinear response of the superstructure are less conservative.

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