Reinforced Concrete Structural Walls without Special Boundary Elements

To resolve the undesirable effects of reinforced concrete non-structural walls to the earthquake behaviour of structural members, weak points (called "Structural Slits") are intentionally provided at the connection between structural members and non-structural walls. This paper presents an estimation method for the stress developed in the "Structural Slits" which are applied to the non-structural walls of reinforced concrete high-rise residential buildings.

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Applying Analytical Functions to Define Special Boundary Elements in a Elasto-Plastic Problem with Singularities Idealized by Finite Elements

Engineering Software III ◽

10.1007/978-3-662-02335-8_19 ◽

1983 ◽

pp. 237-253

Author(s):

O. Ohtmer

Keyword(s):

Finite Elements ◽

Boundary Elements ◽

Special Boundary ◽

Analytical Functions

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Seismic Rehabilitation of a School Building in Cephalonia, Greece

Case Studies on Conservation and Seismic Strengthening/Retrofitting of Existing Structures ◽

10.2749/cs002.001 ◽

2020 ◽

pp. 1-20

Author(s):

Christos Giarlelis ◽

Evlalia Lamprinou ◽

Constantinos Repapis

Keyword(s):

Reinforced Concrete ◽

Response Spectrum ◽

Earthquake Sequence ◽

School Building ◽

Structural Walls ◽

Concrete Walls ◽

Seismic Rehabilitation ◽

Reinforced Concrete Walls ◽

Structural Capacity ◽

Structural Failures

<p>The 2014 earthquake sequence in Cephalonia, Greece, resulted in a number of structural failures. In Argostoli, the capital of the island, a school building suffered light damage; however, the structural assessment following the analysis procedures of the recently published Greek Code for Structural Interventions, showed that seismic strengthening is required. The structure was built on the aftermath of the catastrophic 1953 Ionian earthquake sequence based on older code requirements, which are much outdated, as indicated from the results of both modal response spectrum analyses and non-linear static analyses. The retrofit aims to increase the very low structural capacity of the building and as a means for that the use of concrete jackets is selected. Based on the results of the assessment, it was decided that concrete jackets should be applied to all columns, while large structural walls running along the transversal direction were strengthened with single-sided reinforced concrete jacketing. The interventions are limited by architectural demands and cost considerations. However, analyses of the strengthened structure show that the interventions improve its seismic behaviour adequately. The detailing of interventions is thoroughly presented. What makes this case study interesting is the unusual structural system of the building, which is an ingenious combination of frame elements and lightly reinforced concrete walls and its behaviour to one of the strongest recent Greek earthquakes. The rehabilitation study had to model correctly the structure and propose interventions that were in agreement with the architectural demands and the cost consideration.</p>

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Guest editorial: Nonlinear modelling of reinforced concrete structural walls

Bulletin of Earthquake Engineering ◽

10.1007/s10518-019-00715-z ◽

2019 ◽

Vol 17 (12) ◽

pp. 6359-6368 ◽

Cited By ~ 1

Author(s):

M. Fischinger ◽

T. Isaković ◽

K. Kolozvari ◽

J. Wallace

Keyword(s):

Reinforced Concrete ◽

Guest Editorial ◽

Structural Walls ◽

Nonlinear Modelling

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Influence of lateral loading direction on the peak shear strength of non-rectangular reinforced concrete squat walls

Advances in Structural Engineering ◽

10.1177/1369433219842071 ◽

2019 ◽

Vol 22 (11) ◽

pp. 2392-2405 ◽

Cited By ~ 2

Author(s):

Jiaxing Ma ◽

Bing Li

Keyword(s):

Shear Strength ◽

Reinforced Concrete ◽

Seismic Waves ◽

Lateral Loading ◽

Peak Shear Strength ◽

Lateral Loads ◽

Structural Walls ◽

Finite Element Software ◽

Loading Direction ◽

Squat Walls

Peak shear strength is a critical parameter in the evaluation of the seismic performance of structural walls. Different equations have been proposed to predict the peak shear strength of reinforced concrete squat walls in literature, which assume lateral loading is parallel to the web. In reality, however, seismic waves can reach structures from any direction, which necessitates the studies on the behavior of structural walls under various lateral loading directions. Unlike rectangular walls, non-rectangular walls naturally possess the capacity to resist lateral loads in both transverse and longitudinal directions. To explore the peak shear strength of such walls under different lateral loading directions, a widely used nonlinear finite element software Diana 9.4 was utilized in this article. Appropriate modeling approaches were first selected and further validated by simulating relevant experiments. Then a comprehensive parametric study was carried out to investigate the influence of lateral loading directions and other important parameters.

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