FRAGILITY CURVES FOR THIN-WALLED COLD-FORMED STEEL WALL FRAMES WITH DIFFERENT SHEATHING SYSTEMS AFFECTED BY GROUND SETTLEMENTS DUE TO LAND SUBSIDENCE

Author(s): Ortiz, J. A., Hernandez, L. A., Hernandez, M., Pacheco, J., Soto, J. J., Ramos, J., Fernandez, R. and Soto, M. A.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 625-632
Total Pages: 8
Language: English

Abstract: Land subsidence phenomenon due to ground water withdrawal is a current problem in many places around the world. This causes ground differential settlements that affect structures, mainly dwellings and buildings.

This work presents the results about a study regarding the performance of thin-walled cold-formed steel wall frames with different sheathing systems affected by angular distortions simulating ground differential settlements due to land subsidence.

The wall frames are composed by vertical (studs) and horizontal elements (tracks), with different sheathing systems: polystyrene, OSB, gypsum and calcium silicate. By means of experimental testing of wall frames subjected to monotonic lateral loads, the rotational stiffness was obtained for the wall frames with polystyrene.

Likewise the rotational stiffness of the other wall frame systems was calculated based on the data provided by other author‟s publications. By means of numerical simulation, all the wall frame systems were modeled in a structural analysis software, calibrating them based on the rotational stiffness.

The moment-rotation curves were calculated for the studs and tracks based on the direct strength method. A non-linear static pull down analysis was performed producing several degrees of angular distortion simulating ground settlements.

With the data acquired fragility curves were calculated according three levels of damage.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00