scholarly journals A “direct five-step procedure” for the preliminary seismic design of buildings with added viscous dampers

2018 ◽  
Vol 173 ◽  
pp. 933-950 ◽  
Author(s):  
Michele Palermo ◽  
Stefano Silvestri ◽  
Luca Landi ◽  
Giada Gasparini ◽  
Tomaso Trombetti
Keyword(s):  
Seismic Design ◽  
Viscous Dampers ◽  
Step Procedure

Seismic design of a precast r.c. structure equipped with viscous dampers

2011 ◽  
Vol 2 (3) ◽  
pp. 297-321 ◽  
Author(s):  
Stefano Silvestri ◽  
Giada Gasparini ◽  
Tomaso Trombetti
Keyword(s):  
Seismic Design ◽  
Viscous Dampers

Smooth Acceleration Spectra for Pulse-Like Ground Motions

2020 ◽  
Vol 110 (6) ◽  
pp. 2755-2765
Author(s):  
Cuihua Li ◽  
Guofeng Xue ◽  
Zhanxuan Zuo
Keyword(s):  
Seismic Design ◽  
Amplification Factor ◽  
Response Spectrum ◽  
Ground Motions ◽  
Response Spectra ◽  
Acceleration Response ◽  
Constant Acceleration ◽  
Step Procedure ◽  
Acceleration Response Spectrum ◽  
Smooth Acceleration

ABSTRACT Idealization of acceleration response spectra is the basis for construction of target spectra for seismic design and assessment of structures. The adequacy of current methods to reasonably idealize (or smooth) the acceleration spectra of pulse-like and nonpulse-like ground motions is examined in this study. The influence of separated pulses on different regions of acceleration response spectrum is first investigated using wavelet transform. One representative method is selected as the benchmark to examine the effectiveness of the Newmark–Hall-based methods to smooth the acceleration spectra of pulse-like and nonpulse-like ground motions. Presented are some important insights into why the plateau (or amplification factor) associated with the constant-acceleration branch may be underestimated and the ending cutoff period Tg be overestimated by Newmark–Hall-based methods. This study highlights the intrinsic characteristics and the importance of the constant-acceleration branch, based on which a two-step procedure is proposed to idealize the acceleration spectra. The results show that the proposed methodology can accurately identify the constant-acceleration branch regardless of the influence of pulses on the descending branch of acceleration spectra.

DIRECT DISPLACEMENT-BASED DESIGN OF A BUILDING INCORPORATING VISCOUS DAMPERS

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Anagha Girish Malu ◽  
Satyabrata Choudhury
Keyword(s):  
Seismic Design ◽  
Structural Damage ◽  
Design Method ◽  
Performance Criterion ◽  
Design Tool ◽  
Viscous Dampers ◽  
Direct Displacement Based Design ◽  
Frame Building ◽  
Acceptable Method ◽  
Displacement Based

The Direct Displacement-Based Design (DDBD) method has become a popular seismic design tool for structures. It takes drift as the performance criterion while designing structures. This method overcomes the shortcomings of the traditional force-based seismic design method, which considers peak force as the design parameter. In terms of structural damage, deflection is a better indicator, and hence, DDBD is a more acceptable method for seismic design. In this paper, a 12-story RC frame building with supplemental damping has been designed and investigated using a direct procedure of calculation, while considering the displacement-based design method. The performance of building with and without viscous dampers for a particular performance level has been compared. The effects of the non-linearity of dampers have also been discussed, and the effect of constant and story proportional drift proportional damper forces have been investigated. The results of various cases have been compared. It has been found that drift proportional story shear proportional carried damper design leads to construction economy.

scholarly journals EC8-based seismic design and assessment of self-centering post-tensioned steel frames with viscous dampers

2015 ◽  
Vol 105 ◽  
pp. 60-73 ◽  
Author(s):  
Angelos S. Tzimas ◽  
Athanasios I. Dimopoulos ◽  
Theodore L. Karavasilis
Keyword(s):  
Seismic Design ◽  
Steel Frames ◽  
Viscous Dampers ◽  
Post Tensioned

Study on Seismic Response Reduction of a Long-Span Cable-Stayed Bridge by Adding Viscous Dampers at the Different Positions

2011 ◽  
Vol 295-297 ◽  
pp. 2304-2308
Author(s):  
Zi Qi Li ◽  
Yan Yan Fan
Keyword(s):  
Seismic Response ◽  
Transport System ◽  
Seismic Design ◽  
Special Structure ◽  
Viscous Dampers ◽  
Shock Absorption ◽  
Long Span Bridges ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Important Measure

Bridge is an important part of transport system, especially for the long-span bridges of important route. And it belongs to the lifeline project. It is an important measure for reducing the secondary disaster to ensure bridge’s normality in traffic after the earthquake. Currently, the isolation seismic design of long-span bridges with the special structure is used to reduce damage of bridges by the reason of the earthquake. Based on damping principle of the viscous dampers, the calculation and analysis of what the effect of shock absorption done by damper in decorate position of long-span cable-stayed bridge to structure of bridges are formulated in this paper.

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