Investigating the effect of restraints’ configuration on resistance of double layer braced barrel vaults to Progressive collapse

2019 ◽  
Vol 06 (01) ◽  
pp. 26-38
Author(s):  
Seyedamin Mousavi ◽  
Rahmatelah Najafpour ◽  
Mohammadreza Sheidaii
Keyword(s):  
Double Layer ◽  
Progressive Collapse ◽  
Barrel Vaults

Comparison of four meta-heuristic algorithms for optimal design of double-layer barrel vaults

2018 ◽  
Vol 33 (3-4) ◽  
pp. 115-123
Author(s):  
Ali Kaveh ◽  
Majid Ilchi Ghazaan ◽  
Soroush Mahjoubi
Keyword(s):  
Optimal Design ◽  
Double Layer ◽  
Heuristic Algorithms ◽  
Size Optimization ◽  
Community Centers ◽  
Cross Sectional ◽  
Long Span ◽  
Design Variables ◽  
Rail Station ◽  
Barrel Vaults

Barrel vaults are effective semi-cylindrical forms of roof systems that are widespread for multipurpose facilities including warehouse, rail station, pools, sports center, airplane hungers, and community centers because of providing long-span and economical roof with significant amount of space underneath. In the present study, size optimization of double-layer barrel vaults with different configurations is studied. Four recently developed algorithms consisting of the CBO, ECBO, VPS, and MDVC-UVPS are employed and their performances are compared. The structures are subjected to stress, stability, and displacement limitations according to the provisions of AISC-ASD. The design variables are the cross-sectional areas of the bar elements which are selected from steel pipe sections. The numerical results indicate that the MDVC-UVPS outperforms the other algorithms in finding optimal design in all examples.

Optimal design of double layer barrel vaults considering nonlinear behavior

2016 ◽  
Vol 58 (6) ◽  
pp. 1109-1126 ◽  
Author(s):  
Saeed Gholizadeh ◽  
Changiz Gheyratmand ◽  
Hamed Davoudi
Keyword(s):  
Optimal Design ◽  
Double Layer ◽  
Nonlinear Behavior ◽  
Barrel Vaults

scholarly journals Damage Assessment and Progressive Collapse Resistance of a Long-Span Prestressed Double-Layer Composite Torsional Reticulated Shell

Symmetry ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1434
Author(s):  
Xiaohui Zhang ◽  
Haifang Long ◽  
Jiyang Zhang ◽  
Bo Shen ◽  
Yonghui Hou
Keyword(s):  
Double Layer ◽  
Damage Assessment ◽  
Structural Damage ◽  
Progressive Collapse ◽  
Time History ◽  
Severe Damage ◽  
Control Effect ◽  
Long Span ◽  
Layer Composite ◽  
Collapse Failure

Long-span prestressed double-layer composite torsional reticulated shells have beautiful shapes, which make them a solution widely applied in public buildings requiring long-span structures, such as airports and stadiums. However, once the progressive collapse occurs, this will cause serious issues. There are few studies on the damage assessment of long-span spatial structures under accidental loads. This paper proposes a new dynamic damage evaluation index that takes into account the displacement and the cumulative plastic energy dissipation to evaluate the damage of the long-span prestressed double-layer composite torsional reticulated shell. Sleeve structures were applied to the long-span space structures to study their control effect on structural damage. The equivalent load transient unloading method was used to analyze the dynamic time history of the structure. Results show that the structure suffered severe damage and progressive collapse failure after removing four nodes at different positions near the supports. In the position where the plastic hinges first appear and the position with the maximum displacement, the sleeve structures have a poor damage control effect on the structure. Arranging the two sleeve structures in the position of maximum stress, the damage of the structure can be controlled, thus reducing the severe damage and progressive collapse failure to basic intact damage.

Sign in / Sign up

Export Citation Format

Share Document