Experimental Study of Mechanical Pipe Snubber Seismic Behavior

1997 ◽  
Vol 119 (3) ◽  
pp. 384-388 ◽  
Author(s):  
D. K. Nims ◽  
J. M. Kelly
Keyword(s):  
Experimental Study ◽  
Dynamic Characteristics ◽  
Seismic Behavior ◽  
Full Scale ◽  
Hysteretic Behavior ◽  
Scale Model ◽  
Piping System ◽  
Complicated Pattern ◽  
Seismic Tests ◽  
Input Motion

A series of seismic tests of mechanical snubbers on a full-scale model piping system provided a unique opportunity for detailed scrutiny of snubber seismic behavior on an actual piping system. The observed snubber behavior is a complicated pattern of braking and releasing, drag and drift, and the dynamic characteristics of the snubber, as well as the input motion, play a role in the response of the snubber. The snubbers were effective in limiting pipe displacements. Relative accelerations across the snubber were larger than expected. Snubber hysteretic behavior was irregular. Results from this testing are important in understanding snubber behavior, evaluating snubber performance, and in assessing alternatives to snubbers.

Seismic Performance of Haunched Beam Transfer Structures of Frame-Supported Short-Leg Shearwall with Varied Ratio of Short-Leg Shearwall Section Height to Thickness

2011 ◽  
Vol 255-260 ◽  
pp. 2308-2312
Author(s):  
Yong Qi ◽  
Ci Mian Zhu ◽  
Shu Sheng Zhong ◽  
Fang Wang ◽  
Yang Xiang
Keyword(s):  
Experimental Study ◽  
Energy Dissipation ◽  
Seismic Performance ◽  
Seismic Behavior ◽  
Low Frequency ◽  
Beam Structure ◽  
Beam Structures ◽  
Cyclic Lateral Load ◽  
Energy Dissipation Capacity ◽  
Seismic Tests

This paper deals with an experimental study on the seismic performance of haunched transfer beam structures with varied ratio of section height to thickness of short-leg shearwall (RHT). Based on the seismic tests of three 1:3-scaled specimens under low-frequency cyclic lateral load with constant vertical actions, the failure pattern, the hysteresis curves, the skeleton curves, the energy dissipation capacity, and the stiffness degradation laws of haunched transfer beam structures are investigated. The effects of different RHT (i.e., 5, 6 and 7) on the seismic performance of haunched transfer beam structures are emphasized and analyzed in detail. It is concluded that the rigidity of the structure is noticeable enhanced, the endogen force becomes more evenly distributed and the bearing is more rational with an increase of the RHT; the rationally designed haunched transfer beam structure has a good seismic behavior.

scholarly journals Experimental Assessment on the Hysteretic Behavior of a Full-Scale Traditional Chinese Timber Structure Using a Synchronous Loading Technique

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
XiWang Shi ◽  
Y. Frank Chen ◽  
JinYong Chen ◽  
QingShan Yang ◽  
TieYing Li
Keyword(s):  
Energy Dissipation ◽  
Song Dynasty ◽  
Full Scale ◽  
Hysteretic Behavior ◽  
Scale Model ◽  
Test Model ◽  
Material System ◽  
Deformation Capacity ◽  
Timber Frame ◽  
Vertical Loading

In traditional Chinese timber structures, few tie beams were used between columns, and the column base was placed directly on a stone base. In order to study the hysteretic behavior of such structures, a full-scale model was established. The model size was determined according to the requirements of an eighth grade material system specified in the architectural treatise Ying-zao-fa-shi written during the Song Dynasty. In light of the vertical lift and drop of the test model during horizontal reciprocating motions, the horizontal low-cycle reciprocating loading experiments were conducted using a synchronous loading technique. By analyzing the load-displacement hysteresis curves, envelope curves, deformation capacity, energy dissipation, and change in stiffness under different vertical loads, it is found that the timber frame exhibits obvious signs of self-restoring and favorable plastic deformation capacity. As the horizontal displacement increases, the equivalent viscous damping coefficient generally declines first and then increases. At the same time, the stiffness degrades rapidly first and then decreases slowly. Increasing vertical loading will improve the deformation, energy-dissipation capacity, and stiffness of the timber frame.

scholarly journals EXPERIMENTAL STUDY ON AIR-PERMEABILITY AND CARBONATION OF FULL SCALE MODEL OF CONCRETE WALL USING VARIOUS KINDS OF BINDING MATERIAL

2017 ◽  
Vol 23 (54) ◽  
pp. 357-362
Author(s):  
Akira NONAKA ◽  
Noboru YUASA ◽  
Shuzo OTSUKA ◽  
Shota ISHIWATA ◽  
Yoshihisa NAKATA
Keyword(s):  
Experimental Study ◽  
Air Permeability ◽  
Full Scale ◽  
Scale Model ◽  
Concrete Wall ◽  
Binding Material

Dynamic characteristics and seismic behavior of prefabricated steel stairs in a full-scale five-story building shake table test program

2015 ◽  
Vol 44 (14) ◽  
pp. 2507-2527 ◽  
Author(s):  
Xiang Wang ◽  
Rodrigo Astroza ◽  
Tara C. Hutchinson ◽  
Joel P. Conte ◽  
José I. Restrepo
Keyword(s):  
Dynamic Characteristics ◽  
Seismic Behavior ◽  
Full Scale ◽  
Shake Table Test ◽  
Shake Table ◽  
Test Program ◽  
Story Building

Seismic Performance of Steel Frames for Sustainable Structural System

2012 ◽  
Vol 204-208 ◽  
pp. 2705-2712
Author(s):  
Sang Hoon Oh ◽  
Hong Sik Ryu
Keyword(s):  
Cyclic Loading ◽  
Concrete Slab ◽  
Precast Concrete ◽  
Primary Objective ◽  
Full Scale ◽  
Hysteretic Behavior ◽  
Scale Model ◽  
Moment Frame ◽  
Test Procedures ◽  
Steel Moment Frame

A test on a full-scale model of a three-spans and two-story steel moment frame with dampers and releasable slab was conducted. The details of the test frames, test instruments, set-up procedures, and test procedures were presented. The column and beam were connected by dampers that could initiate the plastic deformation during cyclic loading before damage occurred in the beam and column. The precast concrete slab was designed to be releasable and for saving story height. The primary objective of this test was to verify structural performance and constructability of a full-scale sustainable steel frame. Test results confirm that the sustainable frame showed stable hysteretic behavior without any serious damage up to a drift angle of 1/12; and the sustainable frames were released systematically in spite of serious cyclic loading.

Full-Scale Model Experimental Study of the HDPE Multitube Saddle of an Extradosed Bridge

2022 ◽  
pp. 1-11
Author(s):  
Jie Li ◽  
Dayu Yang ◽  
Yuanhong Hu ◽  
Tengda Feng ◽  
Lizhou Xie
Keyword(s):  
Experimental Study ◽  
Full Scale ◽  
Scale Model
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