Experimental Study on Friction Seismic Sway Bracings for Seismic Protection of Building Nonstructural Components

2021 ◽  
pp. 1-22
Author(s):  
Feng Yue ◽  
Sujit Jaisee ◽  
Bin Zhu ◽  
Yi Hao Ooi
Keyword(s):  
Experimental Study ◽  
Seismic Protection ◽  
Nonstructural Components

Passive Seismic Protection of Building Piping Systems — A Review

2020 ◽  
Vol 20 (03) ◽  
pp. 2030001 ◽  
Author(s):  
Jie Tan ◽  
Peng Zhang ◽  
Qian Feng ◽  
Gangbing Song
Keyword(s):  
Base Isolation ◽  
State Of The Art ◽  
The State ◽  
Seismic Protection ◽  
Internal Stresses ◽  
Piping System ◽  
Seismic Safety ◽  
Nonstructural Components ◽  
Piping Systems ◽  
Passive Seismic

Piping systems are typical nonstructural components of a building. Previous investigations have reported many cases that earthquake causes damages or failures of piping system, resulting in secondary disasters. Therefore, this paper conducts a survey of the seismic damage of the piping systems of buildings and then reviews the state-of-the-art of the passive seismic protection methods. This paper proposes to classify the building piping system into rigid connected pipes, flexible connected pipes and semi-rigid connected pipes. Typical seismic damages of building pipes are presented following this classification. Then, several current seismic protection methods (including constructional measures, seismic braces, damping techniques and base isolation methods) are discussed regarding the theoretical mechanism and feasibility. Furthermore, the state-of-the-art of the building piping system and the passive protection methods with application prospects are evaluated. Based on the review, the flexible piping systems are most commonly used in existing old buildings and are more vulnerable in earthquakes due to their high flexibility. New buildings prefer the rigid connections which tend to restrain the motion of the pipe. However, the excessive stiffness of the rigid connection may cause overlarge internal stresses in both the connection and the pipe. Semi-rigid piping systems have sufficient overall stiffness and a degree of local deform ability and thus have the best seismic performance. In future studies, more research should be devoted to propose and develop new dampers suitable for piping systems, which will improve the seismic safety of building piping systems.

AN EXPERIMENTAL STUDY OF IN-PLANE, ARCH-SHAPED FLEXURAL DAMPER

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Yen-Po Wang ◽  
Di-Hung Chen ◽  
Chien-Liang Lee
Keyword(s):  
Experimental Study ◽  
Stress Concentration ◽  
Seismic Performance ◽  
Shaking Table ◽  
Seismic Protection ◽  
Building Structures ◽  
Shaking Table Tests ◽  
Earthquake Intensity ◽  
Component Test ◽  
Portal Frame

An innovative displacement-dependent metallic yielding damper designed to deform inelastically under in-plane flexural bending for seismic protection of building structures is proposed. The in-plane flexural damper that originated from a portal frame is modified by replacing the beam with a circular arch so that the effect of stress concentration can be minimized. Component tests of the in-plane dampers were conducted and compared with analytical results. Hysteresis of the component test indicates a consistent energy-dissipative characteristic of the damper. Moreover, seismic performance of the proposed damper via a series of shaking table tests was carried out. Excellent seismic performance of the proposed in-plane arched damper was observed. The acceleration responses in both peak and root-mean-squares of all floors are significantly reduced, and were greater in extent compared to the earthquake intensity increases.

An experimental study of MR dampers for seismic protection

1998 ◽  
Vol 7 (5) ◽  
pp. 693-703 ◽  
Author(s):  
S J Dyke ◽  
B F Spencer ◽  
M K Sain ◽  
J D Carlson
Keyword(s):  
Experimental Study ◽  
Seismic Protection ◽  
Mr Dampers

Seismic protection of modular buildings with bonded rubber unit sliders: Experimental study

2020 ◽  
Vol 154 ◽  
pp. 106790
Author(s):  
John Jing ◽  
G. Charles Clifton ◽  
Krishanu Roy ◽  
James B.P. Lim
Keyword(s):  
Experimental Study ◽  
Seismic Protection ◽  
Modular Buildings

Experimental Study of Sliding Hydromagnetic Isolators for Seismic Protection

2019 ◽  
Vol 145 (5) ◽  
pp. 04019021 ◽  
Author(s):  
Yongbo Peng ◽  
Luchuan Ding ◽  
Jianbing Chen ◽  
Roberto Villaverde
Keyword(s):  
Experimental Study ◽  
Seismic Protection

An adaptive VISCOUS damping wall for seismic protection: Experimental study and performance-based design

2021 ◽  
pp. 102645
Author(s):  
Fei-Fei Sun ◽  
Jia-Qi Yang ◽  
Meng Wang ◽  
Tan-Ye Wu
Keyword(s):  
Experimental Study ◽  
Performance Based Design ◽  
Seismic Protection ◽  
Viscous Damping ◽  
And Performance

An experimental study of active base isolation control for seismic protection

2010 ◽  
Author(s):  
Chia-Ming Chang ◽  
Billie F. Spencer, Jr.
Keyword(s):  
Experimental Study ◽  
Base Isolation ◽  
Seismic Protection ◽  
Active Base

An Experimental Study on the Seismic Response of Base-Isolated Secondary Systems

2001 ◽  
Vol 124 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Hany Khechfe ◽  
Mohammad Noori ◽  
Zhikun Hou ◽  
James M. Kelly ◽  
Goodarz Ahmadi
Keyword(s):  
Experimental Study ◽  
Communication Network ◽  
Base Isolation ◽  
Power Transmission ◽  
Seismic Protection ◽  
Secondary System ◽  
Computer Equipment ◽  
Analytical Work ◽  
Secondary Systems ◽  
Future Work

The paper provides an experimental study on the feasibility of base isolation for seismic protection of nonstructural secondary system such as sensitive instrumentation, computer equipment, communication network, HVAC facilities, and power transmission systems housed in nonisolated primary structures. Damages to these secondary systems may result in significant social chaos and costly economic loss. A one-sixth-scaled three-story building model with a single-degree-of-freedom secondary system placed on its third floor is employed in this study. The secondary system is base-isolated by a laminated rubber bearing (LRB) base isolation system from the supporting floor. The ground motion input is simulated by a shaking table which generates three different types of signal including sweeping harmonic sinusoidal, the S00E component of the 1940 E1 Centro earthquake, and the simulated white noise. The experimental results demonstrate significant reduction in both displacement and acceleration responses of the secondary system by using the base isolation. Effects of parameters of the base isolation such as damping ratio and mass on its performance are also investigated. This study provides a valuable guideline for future work in this area and also verifies some previous analytical work by the authors (Hou et al., 2001). Secondary systems in a structure can be divided into two categories: structural and nonstructural. A thorough review of these types of systems and their response behavior under seismic loading has been presented by (Chen and Soong, 1988). In this paper, only nonstructural secondary systems are the subject of the study. These systems include sensitive instrumentation, computer equipment, communication network, HVAC facilities, and power transmission system that reside within a primary structure system. The huge investment made, the mission, and the critical role played by secondary systems in modern day warrant an effective protection strategy against earthquake-induced vibrations. Studies on employing base isolation techniques to protect primary structures have shown the ability of such techniques to limit dynamic response of structures in seismic disturbance (Kelley, 1986; and Ahmadi, 1988); this paper proposes the adoption of a base isolation mechanism for seismic protection of secondary systems and presents the experimental results achieved with this strategy in a scaled-down system designed without primary structural isolation. This study provides a valuable guideline for future work in this area and also verifies some previous analytical work by the authors (Ghantous, 1991; and Samaha, 1992).

Experimental study on slotted RC wall with steel energy dissipation links for seismic protection of buildings

2017 ◽  
Vol 145 ◽  
pp. 1-11 ◽  
Author(s):  
Kailai Deng ◽  
Peng Pan ◽  
Haishen Wang ◽  
Shaodong Shen
Keyword(s):  
Experimental Study ◽  
Energy Dissipation ◽  
Seismic Protection

scholarly journals The Experimental Analysis Of An Innovative Yielding Metallic Damper

2015 ◽  
Vol 11 (2) ◽  
pp. 38-45 ◽  
Author(s):  
Vasile-Mircea Venghiac ◽  
Mihai Budescu
Keyword(s):  
Experimental Study ◽  
Energy Dissipation ◽  
Seismic Energy ◽  
Seismic Protection ◽  
Frame Structures ◽  
Shake Table ◽  
Natural Phenomena ◽  
Steel Frame Structures ◽  
Energy Dissipation Capacity ◽  
Metallic Damper

Abstract One of the most destructive natural phenomena is the earthquake. These events destroy lives, goods and disrupt human activities. For this reason the anti-seismic protection of buildings is a very important and of interest subject in Civil Engineering. In the case of structures with a low seismic energy dissipation capacity (for example steel frame structures with Slimdek composite floors), this problem becomes more complicated due to the requirement of dampers. In this paper an experimental study is presented regarding an innovative yielding metallic energy dissipation device, proposed by the author. An experiment is carried out on a shake table. By studying the results from the experiments and from the previous carried out numerical analysis we can conclude that this device provides a high anti-seismic protection for this type of structures.

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