Determination of seismic isolation effects on irregular RC buildings using friction pendulums

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 3436-3452
Author(s):  
Emrah Meral
Keyword(s):  
Seismic Isolation ◽  
Rc Buildings ◽  
Isolation Effects

TREND OF SEISMIC RESPONSES OF EXISTING HIGH-RISE RC BUILDINGS

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Yusuke Maida ◽  
Tomofusa Akita ◽  
Nobuyuki Izumi
Keyword(s):  
Seismic Response ◽  
Ground Motion ◽  
Seismic Isolation ◽  
Rc Buildings ◽  
Response Control ◽  
Control Structures ◽  
Seismic Ground Motion ◽  
Seismic Response Control ◽  
High Rise ◽  
Seismic Resistant

This report presents studies on the seismic response of high-rise RC buildings in Japan. Data concerning the seismic response of approximately 600 high-rise RC buildings constructed from 1972 to 2015 were collected. Seismic response characteristics were analyzed by focusing on differences in seismic resistant structures, seismic response control structures, and seismic isolation structures. The results indicated that the maximum story drift ratio response under the level 1 study seismic ground motion (R) and the level 2 study seismic ground motion (R) criteria is smaller for seismic isolation structures than that of the seismic resistant structure and seismic response control structures. In addition, focusing on the R-R relationship, the correlation is low in the seismic resistant and seismic response control structures, but is almost linear in the seismic isolation structure. This is because the seismic isolation structure is designed such that the superstructure does not become plastic even with level 2 seismic ground motion.

A Comparative Investigation of Structural Performance of Typical and Non-Ducitle Public RC Buildings Strengthened Using Friction Dampers and RC Walls

2017 ◽  
pp. 112-127 ◽  
Author(s):  
Erkan Akpinar ◽  
Seckin Ersin
Keyword(s):  
Ground Motion ◽  
Comparative Investigation ◽  
Rc Buildings ◽  
Post Intervention ◽  
Friction Dampers ◽  
History Analysis ◽  
Response History Analysis ◽  
Nonlinear Static ◽  
Selection Of

Strengthening of non-ductile public buildings is a never-ending issue. Selection of the suitable strengthening method and appropriate analysis type for the assessment of pre- and the post-intervention performances are still open to question. The displacement or drift limitations are crucial as well as demand capacity ratios for determination of such buildings performance under severe ground motion. In this chapter, an investigation of seismic performance focused on displacement criterion of strengthened non-ductile public RC buildings in Turkey is presented. Both the nonlinear static and response history analysis were conducted. Friction dampers which are fairly modern technique and conventional RC wall implementation method were introduced to as-is building. For the simplicity and the easy of the process, 2D frame selected for investigation. Comparison of the aforementioned techniques for non-ductile public RC buildings and performances particularly by means of displacement obtained using different methods for those investigated schemes are carried out and presented in the chapter.

A Comparative Investigation of Structural Performance of Typical and Non-Ducitle Public RC Buildings Strengthened Using Friction Dampers and RC Walls

2019 ◽  
pp. 1073-1089
Author(s):  
Erkan Akpinar ◽  
Seckin Ersin
Keyword(s):  
Ground Motion ◽  
Comparative Investigation ◽  
Rc Buildings ◽  
Post Intervention ◽  
Friction Dampers ◽  
History Analysis ◽  
Response History Analysis ◽  
Nonlinear Static ◽  
Selection Of

Strengthening of non-ductile public buildings is a never-ending issue. Selection of the suitable strengthening method and appropriate analysis type for the assessment of pre- and the post-intervention performances are still open to question. The displacement or drift limitations are crucial as well as demand capacity ratios for determination of such buildings performance under severe ground motion. In this chapter, an investigation of seismic performance focused on displacement criterion of strengthened non-ductile public RC buildings in Turkey is presented. Both the nonlinear static and response history analysis were conducted. Friction dampers which are fairly modern technique and conventional RC wall implementation method were introduced to as-is building. For the simplicity and the easy of the process, 2D frame selected for investigation. Comparison of the aforementioned techniques for non-ductile public RC buildings and performances particularly by means of displacement obtained using different methods for those investigated schemes are carried out and presented in the chapter.

scholarly journals EMPIRICAL DETERMINATION OF THE FUNDAMENTAL PERIOD OF FREE VIBRATION OF RC BUILDINGS

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Andrija Radovic
Keyword(s):  
Reinforced Concrete ◽  
Free Vibration ◽  
Fundamental Period ◽  
Design Stage ◽  
Reinforced Concrete Structures ◽  
Complex Task ◽  
Rc Buildings ◽  
Approximate Methods ◽  
Empirical Determination

Determining the value of the fundamental period of vibrations of reinforced concrete structures is a complex task. In order to have certain data on the fundamental period of vibration in the earliest design stage, engineers use various approximate methods, which can quickly and simply, but still sufficiently accurate, provide an estimate of the required parameter.The paper presents the most frequently used empirical expressions describing the dependence of the fundamental period in the function of the number of storeys, or the height of the building. All of these expressions, with greater or lesser accuracy, give an estimate of the required value, as shown by a number of examples. A graphic representation of all expressions and their comparison with experimental and numerically derived values has been performed.

The Effect of Isolation Layer Yield Stress on the Seismic Response of Base Isolated Frame Structure

2013 ◽  
Vol 339 ◽  
pp. 635-637
Author(s):  
Fang Zhang
Keyword(s):  
Yield Stress ◽  
Seismic Isolation ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Isolation Layer ◽  
Reinforced Concrete Frame Structure ◽  
Isolation Effects ◽  
The Relationship ◽  
Selection Of

At present the research on the effect of the isolation layer parameters on earthquake response of base-isolated structure is rarely. To solve this problem, this paper taking a reinforced concrete frame structure for example, used ANSYS software to analyze the response of base-isolated structure under earthquake. It focused on the relationship between the isolation layer yield stress and the isolation effects, and provided reference for reasonable selection of seismic isolation layer parameters.

Analysis of the Influence on the Dynamic Characteristics of Base Isolated Frame Structure for the Elastic Stiffness of the Isolation Layer

2013 ◽  
Vol 739 ◽  
pp. 272-274
Author(s):  
Fang Zhang
Keyword(s):  
Dynamic Characteristics ◽  
Seismic Isolation ◽  
Elastic Stiffness ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Isolation Layer ◽  
Reinforced Concrete Frame Structure ◽  
Isolation Effects ◽  
Selection Of

In the design of base isolated structure, the parameter of seismic isolation layer is very important. At this problem, taking the reinforced concrete frame structure for example, using ANSYS software, the paper analyzed the dynamic characteristics of the base isolated structure, focused on the relation of the elastic stiffness of isolation layer and the isolation effects, and provided reference for reasonable selection of seismic isolation layer parameter.

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