STRUCTURAL DESIGN OF HIGH-RISE BUILDING WITH BASE ISOLATION SYSTEM USING ELASTIC SLIDING BEARINGS AND RUBBER BEARINGS

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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Dynamic Characteristics of a Sliding Bearing Using Lubricant Material for Base Isolation of Light Structures

Seismic Engineering ◽

10.1115/pvp2003-2101 ◽

2003 ◽

Author(s):

Nobuo Masaki ◽

Sadamitsu Takeuchi ◽

Hisashi Hirata

Keyword(s):

Coefficient Of Friction ◽

Base Isolation ◽

Damping Factor ◽

Sliding Bearings ◽

Sliding Bearing ◽

Isolation System ◽

Wooden House ◽

The Coefficient Of Friction ◽

Base Isolation System ◽

Rubber Bearings

The authors have been developed a system for base isolation of a wooden house and a prefabricate house. It consists of sliding bearings and laminated rubber bearings. There are two types of sliding bearings, one has the coefficient of friction of 0.046, the other has 0.06. Each of sliding bearings supports 30 ∼ 40kN of vertical load, the surface pressure of the sliding shoe is 10 ∼ 12 N/mm2 (10∼12MPa). The horizontal stiffness of the laminated rubber bearing is 38.5N/mm. For base isolation of an ordinary wooden house, 12 ∼ 16 sliding bearings and 4 ∼ 6 laminated rubber bearings are used. If the mass of a wooden house is 40ton and it is supported by 16 sliding bearings of the coefficient of friction of 0.046 and attached by 4 laminated rubber bearings with the horizontal stiffness of 38.5 N/mm, therefore it has 0.249 of the equivalent damping factor and 3.2 second of the natural period. As for the base isolated houses which are used this system, 500 houses have been constructed in Japan currently by the August of 2002 (Takahashi, 2002). As an advanced system of this base isolation system, we have developed a new type of the base isolation system of sliding bearing using silicone lubrication materials and rubber spring devices.

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Three-dimensional base-isolation system using thick rubber bearings

10.1117/12.916965 ◽

2012 ◽

Author(s):

T. Wang ◽

F. Wang

Keyword(s):

Base Isolation ◽

Three Dimensional ◽

Isolation System ◽

Base Isolation System ◽

Rubber Bearings

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Seismic Analysis and Comparison of Different Base Isolation Systems for a Multi-Storey RC Building with Irregularities in Plan

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.594-597.1788 ◽

2012 ◽

Vol 594-597 ◽

pp. 1788-1799 ◽

Cited By ~ 1

Author(s):

Donato Cancellara ◽

Fabio de Angelis

Keyword(s):

Base Isolation ◽

Seismic Analysis ◽

Cyclic Behavior ◽

Isolation System ◽

High Damping Rubber Bearings ◽

Fixed Base ◽

Base Isolation System ◽

High Damping Rubber ◽

Isolation Systems ◽

Rubber Bearings

In the present paper the dynamic nonlinear analysis for a 3D base isolated structure is illustrated. A base isolated reinforced concrete building is designed and verified according to the European seismic codes such that the superstructure remains almost completely elastic and the nonlinear elements are localized only in the base isolation system. Nonlinear hysteretic models have been adopted to reproduce the cyclic behavior of the isolators. Two different base isolation systems are considered and their performances are compared for evaluating the behaviour of a base isolated building, highly irregular in plan, in presence of a seismic excitation defined with recorded accelerograms which characterize the bi-directional ground motions. The isolation system has been realized with a combination in parallel of elastomeric bearings and sliding devices. In the first analyzed isolation system we have used the High Damping Rubber Bearings (HDRB) and in the second analyzed isolation system we have used the Lead Rubber Bearings (LRB). Finally a comparative analysis between the base isolated structure with hybrid base isolation systems and the conventional fixed base structure is detailed.

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Design of Shape Memory Alloy Damper for Base Isolated Structure

Volume 1B: 16th Biennial Conference on Mechanical Vibration and Noise ◽

10.1115/detc97/vib-3824 ◽

1997 ◽

Author(s):

Krzysztof Wilde ◽

Paolo Gardoni ◽

Yozo Fujino ◽

Stefano Besseghini

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Base Isolation ◽

Hysteretic Behavior ◽

Isolation System ◽

Rubber Bearing ◽

Laminated Rubber Bearing ◽

Base Isolation System ◽

Rubber Bearings ◽

Smart Base Isolation

Abstract Base isolation provides a very effective passive method of protecting the structure from the hazards of earthquakes. The proposed isolation system combines the laminated rubber bearing with the device made of shape memory alloy (SMA). The smart base isolation uses hysteretic behavior of SMA to increase the structural damping of the structure and utilizes the different responses of the SMA at different levels of strain to control the displacements of the base isolation system at various excitation levels. The performance of the smart base isolation is compared with the performance of isolation by laminated rubber bearings to assess the benefits of additional SMA damper for isolation of three story building.

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Influence of the Strain Hardening of HDRBs in the Evaluation of the Seismic Response of a RC Base Isolated Structure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.602-604.1546 ◽

2012 ◽

Vol 602-604 ◽

pp. 1546-1554

Author(s):

Donato Cancellara ◽

Fabio de Angelis ◽

Mario Pasquino

Keyword(s):

Strain Hardening ◽

Seismic Response ◽

Base Isolation ◽

Cyclic Behavior ◽

Hysteretic Model ◽

Isolation System ◽

Limit Value ◽

Hardening Effect ◽

Base Isolation System ◽

Rubber Bearings

In this paper we have analyzed the influence of the strain hardening behavior of High Damping Rubber Bearings (HDRBs) adopted for a base isolation system of a Reinforced Concrete (RC) isolated structure. For the modeling of the rubber isolators we have adopted an evolution of the Bouc-Wen’s hysteretic model taking into account the incremental hardening effect which appears when the shear strain of the HDRB exceeds the limit value around 100% usually adopted in design practice. The incremental hardening effect is sometimes neglected in the design but it is an important aspect because it ensures a seismic protection of the base isolated structure also in presence of exceptional seismic events for intensity or frequency content. In this paper we have highlighted the significant influence of this phenomenon in the seismic response of the isolated structure by reporting the cyclic behavior of a HDRB respectively neglecting and considering this aspect.

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