Department of Civil Engineering

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Author: search.filters.author.Muthukumar, G.Subject: search.filters.subject.Chemistry

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    Influence of Shear Core Curtailment on the Structural Response of Core-Wall Structures
    (Springer, 2018-08) Muthukumar, G.; Kumar, manoj
    Shear walls and shear cores are the major lateral load resisting elements in multi-storeyed framed structures because of their proven track record in mitigating the damage under severe earthquake ground motions including the recent ones. The contrasting deflected profiles of shear core and frame actually help in reducing the drift of the structure. The reduction is primarily attributed to the level of horizontal interaction between cores and frames. The present study aims to simulate the horizontal interaction between core wall and frames using the dimensionless parameter () capable of characterizing the individual behaviors of the components of the dual system using the finite element analysis with different levels of curtailment of shear core. The triangular loading has been considered, and the computations have been made considering the site located in zone 4 with medium soil characteristics. To this end, in order to identify the optimum level of curtailment, an analytical study has been done on some shear core buildings with different levels of curtailment of shear core. The structural performance of the buildings with different levels of curtailment has been assessed for different parameters, namely, storey drift, deflection, bending moment, and shear forces using finite element modeling and analysis
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    Design and Performance Criteria for Fire-Resistant Design of Structures – An Overview
    (Springer, 2020-09) Muthukumar, G.
    Concrete, despite being inherently fire resistant, cannot be considered as a fire-proof material. It undergoes substantial variation in its characteristics during exposure to elevated temperatures. These variations may become hazardous for structural stability and serviceability depending upon the type and extent of exposure. Moreover, high-strength concrete, which is commonly used in tall buildings, may perform poorly against fire due to its high binder content and very low permeability. Despite all the aforementioned factors, fire resistance design of structural members has been given very restricted consideration in the current Indian practice. Although several standards provide guidelines to achieve fire safety in structures, the provisions for high-strength concrete and spalling prevention are not specifically available in the major international and national standards. This paper attempts to compare the provisions corresponding to fire-resistant design in Indian standard with the respective provisions of other country standards, e.g., ACI 216 [3], NZS 3101 [4], EN 1992–2 [8], etc. Comparison parameters primarily include the design requirements for various structural members to improve their fire resistance. Furthermore, suitable recommendations for Indian Codal provisions are attempted in the latter part of the paper to achieve superior performance under elevated temperatures.