Seismic response of a stock of social housings in Italy with r.c. and masonry materials.

Bonannini, Elisa; Cinotti, Marco; Puppio, Mario Lucio; Sassu, Mauro

doi:10.2991/icmmse-17.2017.46

Cited by 3 publications

(5 citation statements)

References 22 publications

(24 reference statements)

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“…In this paper, different application to real cases are showed. Furthermore, the creation of a new structure designed to absorb horizontal action is very relevant because (1) it is in line with the original static conception of the building; (2) it decreases the seismic action on the existing structure; (3) it presents less uncertainty compared to a traditional intervention on an existing structure. For these reasons the intervention with external bracing system finds a natural application in this case.…”

Section: External Retrofit With Bracing Systemsmentioning

confidence: 94%

“…he seismic enhancement of existing Reinforced Concrete (R.C.) structures, built before the introduction of seismic regulations, is a topical issue [1][2][3]. In recent years several researches have been carried out on this topic to study the behaviour of the external seismic consolidation systems.…”

Section: External Retrofit With Bracing Systemsmentioning

confidence: 99%

“…It is observed that some variables dominate the design of the dissipative system: (1) Relative stiffness of the bracing; The stiffness of the braces is evaluated assuming a structural role for both diagonals (see Eq. (12)).…”

Section: Parameters Analysismentioning

confidence: 99%

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Parametric analysis on external dissipative link system for seismic protection of low rise r.c. buildings

Puppio

Ferrini

2019

Frattura Ed Integrità Strutturale

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The seismic rehabilitation of existing R.C. and masonry buildings is a topical issue in Civil Engineering. A useful technique consists in the introduction of the external bracing system. This kind of intervention can be improved through the introduction of dissipative links, investigated here with the help of some examples. The links are made of common steel profiles: length, geometry and positioning are considered as design parameters. A general procedure of link-bracing optimization is proposed by applying a set of identical external restraints. The adopted dissipative links allow a cheaper and more effective design both in terms of ULS and of DLS: the damages are addressed in a small area allowing easy replacement of the links in case of an earthquake.

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Section: External Retrofit With Bracing Systemsmentioning

confidence: 94%

Section: External Retrofit With Bracing Systemsmentioning

confidence: 99%

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Parametric analysis on external dissipative link system for seismic protection of low rise r.c. buildings

Puppio

Ferrini

2019

Frattura Ed Integrità Strutturale

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“…Nevertheless, most of r.c. buildings in Italy were built without following specific seismic codes, with consequent high vulnerability under earthquake type actions (Bonannini et al 2017). The seismic response of r.c.…”

Section: Introductionmentioning

confidence: 99%

Structural irregularity: The analysis of two reinforced concrete (r.c.) buildings

Puppio¹,

Giresini²,

Doveri³

et al. 2019

10.5267/j.esm

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Structural irregularity is a crucial issue in assessing seismic vulnerability of both new and existing buildings. European technical codes provide simple criteria to define irregularities in plan and in elevation, amplifying the seismic actions and/or introducing torsional effects. Nevertheless, this approach only considers geometrical irregularity. For existing buildings, another source of irregularity comes from the non-uniform distribution of the material strength. In particular, for existing reinforced concrete (r.c.) structures, it is possible to detect significant spread of the concrete compressive strength not only from different structural elements but also from different parts of the same member. In this work, non-linear static analysis is performed on two case-studies of r.c. buildings characterized by geometrical and mechanical irregularity. The resistance of each column is determined with an extensive experimental campaign with in situ and laboratory test (about 600 in situ tests). The results are analyzed considering both local and global effects in terms of resistance of the single elements and of the entire buildings. In this sense, shear and bending failure mechanism are taken into account. The effect of storey flexibility is also considered in the models. Fragility curves are calculated for the buildings with random distribution of the compressive strength of the columns. The results are then compared with the approaches proposed by the Eurocodes evaluating in the standard approach proposed by technical codes is conservative or not.

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“…Furthermore, many buildings failed in torsion due to asymmetric layout of masonry walls [2]. In the last decades, several studies on the design eccentricity were carried out [3][4][5][6][7][8][9][10][11][12][13]. Building irregularity -unknown concept in the classical and post-classical architecture -became a particularly widespread condition in postmodern and rational architecture.…”

mentioning

confidence: 99%

Building irregularity issues and architectural design in seismic areas

Alecci

Stefano

2018

Frattura Ed Integrità Strutturale

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When designing buildings in seismic areas, choices of the architectural designer heavily influences seismic structural performances. Namely, building morphology may lead to complex seismic responses as it occurs when building plan and elevation become irregular. Typical irregularities are due to architectural, functional and distribution constraints, thus leading to plan or vertical or combined plan/vertical irregularities. A frequent plan-wise irregularity arises when earthquake resistant structures, such as cores and shear walls, are concentrated on one side of the building plan, while vertical irregularity often arises from the presence of soft stories especially located at the ground level or, less frequently, at an intermediate level. In the last decades, some trends in architectural design, such as Deconstructivism and other contemporary theories, worked in pursuing architectural solutions based on the concept of "deconstruction" in place of "construction", favoring non-rigid schemes, non-regular shapes and, more generally, avoiding geometric rules and classical canons of symmetry and regularity. In this paper the above issues are investigated with the goal of assessing effects of irregularity conditions, introduced by the architectural design, on the building seismic performances with the aim at not forbidding the designer ambitions but at making him aware of the effects of his architectural choices.

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Seismic response of a stock of social housings in Italy with r.c. and masonry materials.

Cited by 3 publications

References 22 publications

Parametric analysis on external dissipative link system for seismic protection of low rise r.c. buildings

Parametric analysis on external dissipative link system for seismic protection of low rise r.c. buildings

Structural irregularity: The analysis of two reinforced concrete (r.c.) buildings

Building irregularity issues and architectural design in seismic areas

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