Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 66, Number 6, June25 2018 , pages 783-792 DOI: https://doi.org/10.12989/sem.2018.66.6.783 |
|
|
|
Theoretical study of sleeved compression members considering the core protrusion |
||
Chenhui Zhang and Changgen Deng
|
||
| Abstract | ||
| This paper presents a detailed theoretical study of the sleeved compression members based on a mechanical model. In the mechanical model, the core protrusion above sleeve and the contact force between the core and sleeve are specially taken into account. Via the theoretical analyses, load-displacement relationships of the sleeved compression members are obtained and verified by the experimental results. On the basis of the core moment distribution changing with the increase of the applied axial load, failure mechanism of the sleeved compression members is assumed and proved to be consistent with the experimental results in terms of the failure modes and the ultimate bearing capacities. A parametric study is conducted to quantify how essential factors including the core protrusion length above sleeve, stiffness ratio of the core to sleeve, core slenderness ratio and gap between the core and sleeve affect the mechanical behaviors of the sleeved compression members, and it is concluded that the constrained effect of the sleeve is overestimated neglecting the core protrusion; the improvement of ultimate bearing capacity for the sleeved compression member is considered to be decreasing with the decrease of the core slenderness ratio and for the sleeved compression member with core of small slenderness ratio, small gap and small stiffness ratio are preferred to obtain larger ultimate bearing capacity and stiffness. | ||
| Key Words | ||
| theoretical study; sleeved compression member; load-displacement relationship; failure mechanism; parametric study; buckling constraint | ||
| Address | ||
| Chenhui Zhang and Changgen Deng: College of Civil Engineering, Tongji University, Shanghai 200092, China | ||