Does the design according to the seismic zone affect the environment and the manufacturing cost of a 5-storey R/C building with a conventional plan?

Abstract The main scope of the present research is the analysis, dimensioning and estimation of the cost of a five-storey reinforced concrete building, which is similarly constructed in three different seismic hazard zones (ZI, ZII, ZIII). The ground plan of the building is a conventional floor plan with solid reinforced concrete slabs. The cross-sections of the structural members remain stable, except for the columns whose cross-sections are reduced in height. The aim of the present study is to analyze how the cost of manufacturing the load-bearing structure of a reinforced concrete building is affected by the seismic risk of the area, if that influence is significant and in what extent. Moreover, along with the construction cost, the possible influence to the environment is studied, too.

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Effect of weak foundation on the seismic response of core wall type buildings

Canadian Journal of Civil Engineering ◽

10.1139/l92-062 ◽

1992 ◽

Vol 19 (3) ◽

pp. 530-539 ◽

Cited By ~ 17

Author(s):

A. Filiatrault ◽

D. L. Anderson ◽

R. H. DeVall

Keyword(s):

Reinforced Concrete ◽

Great Influence ◽

Nonlinear Dynamic Analysis ◽

Nonlinear Behaviour ◽

Seismic Zone ◽

Shear Forces ◽

Reinforced Concrete Building ◽

The Core ◽

Concrete Building ◽

Rocking Foundation

This paper investigates the seismic behaviour of a typical wall-type reinforced concrete building with a footing that is unable to develop the flexural wall capacity. Nonlinear dynamic analysis is used to determine the response of the structure under historical earthquakes representing design conditions for a seismic zone 4 in Canada. The analysis incorporates the nonlinear behaviour of the core, footing and soil, and also the uplift of the footing from the soil. Three different structural models are considered: (i) the core on a rigid foundation, (ii) the core on a flexible (rocking) foundation, and (iii) the core on a flexible foundation with the two lower levels connected to a parking structure. The results show that the weak footing does not have a great influence on the performance of the building considered. The parking structure and the rocking foundation cause a reversal and increase of the shear forces in the lower storeys. Also, the reduction of bending moments due to the core yielding is not proportional to the reduction of shear forces. This result suggests a need for different force modification factors for shear and bending. Key words: dynamics, earthquakes, reinforced concrete, building codes, foundations, footings.

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A DEMOUNTABLE PRECAST REINFORCED CONCRETE BUILDING SYSTEM OF MULTI-STORY BUILDINGS

Proceedings of International Structural Engineering and Construction ◽

10.14455/isec.res.2015.138 ◽

2015 ◽

Vol 2 (1) ◽

Author(s):

Jiri Witzany ◽

Radek Zigler ◽

Tomas Cejka ◽

Ales Polak

Keyword(s):

Reinforced Concrete ◽

Characteristic Property ◽

Static Load ◽

Hollow Core ◽

Load Bearing ◽

Reinforced Concrete Building ◽

Concrete Building ◽

Load Tests ◽

Building System ◽

Bearing Structure

The demountable precast reinforced concrete building system consists of bar and thin-walled units allowing designing hybrid integrated systems of multi-storey buildings. The system’s characteristic property are demountable, self-rectifiable and dry joints enabling assembly without wet processes and, in case of need, the disassembly and relocation of the structure. The system applies special mounting, the joint of prestressed hollow core floor units and the load-bearing structure by steel pins additionally embedded in the hollow cores. The article presents the results of experimental research into the major parts and joints of the load-bearing system and the verification of the load-bearing system’s prototype exposed to static load tests with an example of the load-bearing system’s assembly and disassembly.

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Optimization of a reinforced concrete structure subjected to dynamic wind action

Frattura ed Integrità Strutturale ◽

10.3221/igf-esis.59.22 ◽

2021 ◽

Vol 16 (59) ◽

pp. 326-343

Author(s):

Jherbyson Brito ◽

Letícia Miguel

Keyword(s):

Reinforced Concrete ◽

Cross Sections ◽

Concrete Structure ◽

Frame Structure ◽

Reinforced Concrete Structure ◽

Maximum Displacement ◽

Reinforced Concrete Building ◽

Synoptic Wind ◽

Whale Optimization ◽

Concrete Building

This work proposes a methodology to optimize a reinforced concrete structure. For this, the Whale Optimization Algorithm (WOA) algorithm was used, an algorithm from the group of metaheuristic algorithms, which presents an easy computational implementation. As a study object, a frame structure adapted from a real reinforced concrete building was used, subjected to the dynamic action of artificially generated synoptic wind. The objective function is to reduce the volume of concrete of the structure. For that, the dimensions of the cross-sections were used as design variables, and the maximum displacement at the top imposed by the ASCE / SEI 7-10 standard as a lateral constraint, as well as the maximum story drift between floors. In addition to this structural optimization, it was also proposed the use and optimization of Tuned Mass Dampers (TMD), in different quantities, positions and parameters, improving the dynamic response of the reinforced concrete building. The results show that for this situation it was possible to reduce the concrete volume of the structure by approximately 24%, respecting the maximum limit of displacement at the top required by the standard.

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