Performance of an underground structure seismic mitigation system improved by frictional deformation absorbing braces

Structures ◽  
2022 ◽  
Vol 37 ◽  
pp. 1-16
Author(s):  
Chao Ma ◽  
Dechun Lu ◽  
Yuanqi Zhao ◽  
Zuohu Wang ◽  
Xiuli Du
2019 ◽  
Vol 41 ◽  
pp. 42-52
Author(s):  
V. A. Kochetkov ◽  
◽  
N. Yu. Klyuchko ◽  
I. V. Hanarin ◽  
D. Yu. Sheyanov ◽  
...  

2021 ◽  
Vol 13 (7) ◽  
pp. 1273
Author(s):  
Lapo Miccinesi ◽  
Alessandra Beni ◽  
Silvia Monchetti ◽  
Michele Betti ◽  
Claudio Borri ◽  
...  

This paper reports the results of a ground penetrating radar (GPR) survey of the ground-floor of Academia Gallery (Florence, Italy) where the Michelangelo’s David is exhibited to the public. The equipment used was a step-frequency GPR operating in the 100 MHz-1 GHz band, named ORFEUS. The survey covered an area of 13 m × 7.3 m, and the scans were performed along two orthogonal directions. Acquisitions in the same direction were separated by 0.25 m from each other. The GPR was able to confirm the underground structure, as it can be deducted by planimetry and historical documentation. In particular, the radar clearly detected the air-conditioning ducts under the floor and an approximately circular foundation below the basement of the statue.


Buildings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 323
Author(s):  
Vachara Peansupap ◽  
Pisal Nov ◽  
Tanit Tongthong

The kingpost was a vertical element that was used to support the structural strut in the deep excavation. The structural kingpost was commonly arranged by experienced engineers who used two-dimensional construction drawings. Thus, it was still time-consuming and error-prone. Currently, an available construction program has been developed to arrange the structural kingpost by identifying the clash problems in the 3D environment. However, they have a limitation for detecting the clash that was unable to visualize the concurrent clashes between kingpost and many underground structures. Then, the engineer cannot see all the clash incidents with each kingpost and move the kingpost to avoid the clashes successfully. Since the kingpost arrangement was still an inefficient practice that was limited in the visualization aspect, this research used engineering knowledge and advanced construction technology to detect and solve the clashes between kingposts and underground structures. The methodology used engineering knowledge of kingpost arrangement to develop the system modules by using a rule-based approach. Then, these modules were developed into the system by using visual programming of Building Information Modelling (BIM). To test the system, an underground structure from building construction was selected as a case study to apply the developed system. Finally, the finding of this study could overcome human judgment by providing less interaction in the kingpost arrangement and visualization improvement of clash occurrences in the 3D model.


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