scholarly journals STATIC LOADING TESTS OF STEP PART IN STEEL FURRING SUSPENDED CEILING SYSTEM AND ESTIMATION OF REQUIRED DEFORMATION CAPACITY DURING EARTHQUAKES

2017 ◽  
Vol 23 (55) ◽  
pp. 827-831
Author(s):  
Keigo YAMASHITA ◽  
Tadashi ISHIHARA ◽  
Hirofumi KAMBE ◽  
Kento SUZUKI ◽  
Masayuki NAGANO
2019 ◽  
Vol 16 (58) ◽  
Author(s):  
Askar Zhussupbekov

2001 ◽  
Vol 50 (7) ◽  
pp. 745-750
Author(s):  
Masaki HARADA ◽  
Tomoyuki HAYASHI ◽  
Masahiko KARUBE ◽  
Akimitsu IIDA ◽  
Kohei KOMATSU

2016 ◽  
Vol 53 (4) ◽  
pp. 696-707 ◽  
Author(s):  
Hai-lei Kou ◽  
Jian Chu ◽  
Wei Guo ◽  
Ming-yi Zhang

A large-scale field testing program for the study of residual forces in pre-stressed high-strength concrete (PHC) pipe piles is presented in this paper. Five open-ended PHC pipe piles with 13 or 18 m in embedded length were installed and used for static loading tests at a building site in Hangzhou, China. All the piles were instrumented with fiber Bragg grating (FBG) strain gauges. The residual forces in these piles were recorded during and after installation. The measured load transfer data along a pile during the static loading tests are reported. The effect of the residual force on the interpretation of the load transfer behavior is discussed. The field data show that residual force along the installed pile increases approximately exponentially to the neutral plane and then reduces towards the toe. The residual force decreases with time to a stable value after pile jacking due to the secondary interaction between the pile and the disturbed soil around the pile and other factors. The large residual forces along the PHC pipe piles significantly affect the evaluation of the pile load distributions, and thus the shaft and toe resistances. The conventional bearing capacity theory tends to overestimate the shaft resistance at positions above the neutral plane and underestimate the shaft resistance at positions below the neutral plane, and the toe resistance for an open-ended PHC pipe piles founded in stratified soils.


2013 ◽  
Vol 78 (687) ◽  
pp. 1007-1016 ◽  
Author(s):  
Masayoshi NAKAI ◽  
Kazuaki TSUDA ◽  
Shinji MASE ◽  
Hiroyuki NARIHARA ◽  
Takashi OKAYASU ◽  
...  

2016 ◽  
Vol 11 (1) ◽  
pp. 125-135 ◽  
Author(s):  
Hiroyuki Tamai ◽  
◽  
Kazuhiko Kasai ◽  

Shear panel dampers consisting of stiffeners and panels surrounded by four flanges are used as aseismic hysteretic dampers for buildings in Japan. Cracks can form easily in a shear panel damper when shear buckling occurs during the cyclic loading caused by a severe earthquake.For a relatively thin panel with a large width-to-thickness ratio, the damper’s plastic deformation capacity and the presence of shear buckling can be evaluated from the maximum deformation angle. However, when it is relatively small, very-low-cycle fatigue life for a relatively thick panel must be known to predict the usage limit of the damper, because the failure pattern changes when cracks form in the weld between the panels and flanges. Fatigue life relations for a thick shear panel damper with parameters of normalized width-to-thickness ratio and deformation angle are presented. A method for predicting the fatigue life under severe earthquake conditions is also presented. To validate the prediction expression, cyclic loading tests were performed on a shear panel damper and reviewed. The applicability of the method for predicting the fatigue life was confirmed through non-stationary cyclic loading tests. These results showed the validity and effectiveness of the expressions and the method.


2014 ◽  
Vol 590 ◽  
pp. 331-335 ◽  
Author(s):  
Marcela Karmazínová ◽  
Michal Štrba

The paper deals with the problems of the actual behaviour, failure mechanism and load-carrying capacity of the special bolt connection developed and intended for the assembly joints of the truss main girders chords of perspective railway steel temporary bridges. Within the framework of this problem solution, several types of structural details of assembly joints have been considered as the conceptual structural design. Based on the preliminary evaluation of advantages or disadvantages of these ones, in principle two basic structural configurations – so-called “tooth” and “splice plate” connections have been selected for the subsequent detailed investigation. This investigation is mainly based on the experimental verification of the actual behaviour, strain and failure mechanism and corresponding strength of the connection, and on its numerical modelling using FEM. This paper is focused only on the static loading tests results of the splice plate connections and their evaluation, which have already been finished. Simultaneously with the static tests, the fatigue loading tests are being realized, too, but they have not been finished so far, as well as the FEM numerical modelling.


Author(s):  
A. W. Stuedlein ◽  
S. C. Reddy ◽  
T. M. Evans

2017 ◽  
Vol 259 ◽  
pp. 275-279 ◽  
Author(s):  
Ctislav Fiala ◽  
Jaroslav Hejl ◽  
Vlastimil Bílek ◽  
Tomáš Vlach ◽  
Michal Ženíšek ◽  
...  

Mechanical properties of high performance concrete (HPC) enable design of subtle structural elements. Subtle HPC frame concept comes from the effort to integrate load bearing elements into building envelope in order to reduce risks of thermal bridges. Substantial advantages of subtle structural elements are material and energy savings during production, transportation, manipulation and assembling. Paper presents implementation of construction of experimental frame at University Centre UCEEB in Buštěhrad. Individual structural elements were made in prefa plant ŽPSV a.s. in Litice nad Orlicí and Čerčany, the company also assembled the experimental frame. The frame was built from February to April 2016. Within June and July, the construction was tested by static loading test, which partial results are presented in the paper. Accomplished calculations, experimental verification and analysis show that subtle HPC frame is the effective solution from reliability aspects as well as from environmental and economical parameters.


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