scholarly journals DEVELOPMENT AND VERIFICATION OF ANALYTICAL METHOD USING FEM FOR STRUCTURAL DESIGN TO MODEL OUT OF PLANE BENDING BEHAVIOR OF TWO-WAY FLAT SLAB USING CLT

2020 ◽  
Vol 26 (62) ◽  
pp. 103-108
Author(s):  
Yoshisato ESAKA ◽  
Katsuhide MURAKAMI ◽  
Azusa MIMATSU ◽  
Sadamitsu HONDA ◽  
Masao SHIOZAKI ◽  
...  
2008 ◽  
Vol 14 (27) ◽  
pp. 143-148 ◽  
Author(s):  
Eiichi INAI ◽  
Kazuo TAKAHASHI ◽  
Daisuke YAMAMOTO ◽  
Katsuyuki ISHII

2021 ◽  
Vol 104 (1) ◽  
pp. 003685042098433
Author(s):  
Lixia Meng ◽  
Zhaojian Gui ◽  
Ke Zhang ◽  
Junru Liu ◽  
Shiming Liu

The guy cables can effectively improve the bearing capacity for the telescopic boom of the crane, while the introduction of tensioned cables makes the buckling analysis complicated. The primary objective of this study was to propose an analytical method for the out-of-plane buckling of the telescopic boom with the spatial symmetric guy cables. To analyze the influence of the guy cables on the out-of-plane buckling property of the telescopic boom, the deflection differential equation of the multi-stepped telescopic boom with guy cables was established based on the theory of elastic beam, then the buckling characteristic equation to determine the critical load of the telescopic boom was derived. Comparison of results with that given by the finite element method showed the high accuracy of the proposed method. In the end, with this equation, the influences of the structural geometric parameters on the critical load were investigated. The results indicated that, in the engineering application, the critical load of the telescopic boom can be increased by decreasing the length ratio a/L or increasing the angle φ between the two cables. The influence of angle θ on the out-of-plane buckling analysis of the telescopic boom can be neglected. With the proposed method, the buckling behavior of the telescopic boom with guy cables can be solved accurately. The present work is significant to structural design and safety analysis of the telescopic boom, and it can be utilized to provide technical support for the structural design of telescopic boom.


2016 ◽  
Vol 17 (4) ◽  
pp. 429-435 ◽  
Author(s):  
Bengi Aykac ◽  
Sabahattin Aykac ◽  
Ilker Kalkan ◽  
Meryem Bocek

2010 ◽  
Vol 132 (3) ◽  
Author(s):  
Izumi Nakamura ◽  
Akihito Otani ◽  
Masaki Shiratori

Pressurized piping systems used for an extended period may develop degradations such as wall thinning or cracks due to aging. It is important to estimate the effects of degradation on the dynamic behavior and to ascertain the failure modes and remaining strength of the piping systems with degradation through experiments and analyses to ensure the seismic safety of degraded piping systems under destructive seismic events. In order to investigate the influence of degradation on the dynamic behavior and failure modes of piping systems with local wall thinning, shake table tests using 3D piping system models were conducted. About 50% full circumferential wall thinning at elbows was considered in the test. Three types of models were used in the shake table tests. The difference of the models was the applied bending direction to the thinned-wall elbow. The bending direction considered in the tests was either of the in-plane bending, out-of-plane bending, or mixed bending of the in-plane and out-of-plane. These models were excited under the same input acceleration until failure occurred. Through these tests, the vibration characteristic and failure modes of the piping models with wall thinning under seismic load were obtained. The test results showed that the out-of-plane bending is not significant for a sound elbow, but should be considered for a thinned-wall elbow, because the life of the piping models with wall thinning subjected to out-of-plane bending may reduce significantly.


1963 ◽  
Vol 30 (1) ◽  
pp. 134-135
Author(s):  
E. A. Utecht

Curves are presented which give stress intensification factors for curved, thin-walled circular tubes under various combinations of in-plane and out-of-plane bending moments.


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