A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic risk assessment of a 50m high masonry chimney using advanced analysis techniques
The analysis of a brickwork chimney damaged by the 2012 Emilia earthquake is presented. A survey campaign revealed evident diagonal cracks and a significant mortar deterioration in the upper part of the structure. Laboratory tests were carried out to estimate the masonry properties. Lateral force method and pushover analyses using traditional force profiles were shown to be unable to capture the seismic behavior of the chimney. In contrast, the modal pushover analysis (MPA) using force distributions based on six modes of vibration led to crack patterns consistent with the observed damages. The behavior factor to be used in modal response spectrum analyses, estimated from the MPA results, was shown to be slightly higher than unity, indicating a very low dissipative capacity of the structure. Finally, a number of nonlinear response history analyses were carried out using natural accelerograms. In particular, an accurate finite-element model was built using rigid triangular elements connected by means of nonlinear interfaces that incorporate suitable tension, compression, and shear constitutive laws. The results systematically emphasized a shear failure mechanism of the upper part of the chimney. The residual deformations obtained from the analyses were close to those measured after the earthquake.
Seismic risk assessment of a 50m high masonry chimney using advanced analysis techniques
The analysis of a brickwork chimney damaged by the 2012 Emilia earthquake is presented. A survey campaign revealed evident diagonal cracks and a significant mortar deterioration in the upper part of the structure. Laboratory tests were carried out to estimate the masonry properties. Lateral force method and pushover analyses using traditional force profiles were shown to be unable to capture the seismic behavior of the chimney. In contrast, the modal pushover analysis (MPA) using force distributions based on six modes of vibration led to crack patterns consistent with the observed damages. The behavior factor to be used in modal response spectrum analyses, estimated from the MPA results, was shown to be slightly higher than unity, indicating a very low dissipative capacity of the structure. Finally, a number of nonlinear response history analyses were carried out using natural accelerograms. In particular, an accurate finite-element model was built using rigid triangular elements connected by means of nonlinear interfaces that incorporate suitable tension, compression, and shear constitutive laws. The results systematically emphasized a shear failure mechanism of the upper part of the chimney. The residual deformations obtained from the analyses were close to those measured after the earthquake.
Seismic risk assessment of a 50m high masonry chimney using advanced analysis techniques
F. Minghini (author) / A. Tralli (author) / MILANI, GABRIELE (author) / F., Minghini / Milani, Gabriele / A., Tralli
2014-01-01
Article (Journal)
Electronic Resource
English
DDC:
621
Seismic assessment of a CFRP-strengthened masonry chimney
| Online Contents | 2009
Seismic Behavior of a Masonry Chimney with Severe Cracking Condition: Preliminary Study
| Trans Tech Publications | 2014
Tests of masonry for chimney construction
| Engineering Index Backfile | 1899
Numerical analysis of a masonry chimney supported by in situ assessment tools
| British Library Conference Proceedings | 2008