K S VIVEK
@vvitguntur.com
Asst. Professor, Department of Civil Engineering, VVIT
Vasireddy Venkatadri Institute of Technology, VVIT, Nambur, Guntur-522508, AP, India
EDUCATION
M. Tech (Structural Engineering)
RESEARCH INTERESTS
Steel / Metal structures, FRP / FG composite materials, FEA
Scopus Publications
Scholar Citations
Scholar h-index
Scopus Publications
K. S. Vivek, Mohammad Adil Dar, M. I. Ali, M. Manohar, and T. Sreedhar Babu
Springer Science and Business Media LLC
AbstractA comprehensive test program was performed to experimentally investigate the effect of CFRP strengthening on the axial strength and stability of CFS plain angle short columns subjected to monotonic axial compression. A total of 28 specimens were tested by varying the CFRP strengthening configurations for different column heights. Both uni-directional (CF_UD) and bi-directional (CF_BD) CFRP were considered. The influence of various parameters such as the type of CFRP, fiber orientation, and number of CFRP layers was investigated and discussed in detail. For single layer (ply) of CFRP, CF_UD-0° strengthening configuration resulted in maximum increase of axial capacity by 58.33% and 45.72% (in comparison to bare steel specimens), corresponding to 0.5 m and 1.0 m column lengths respectively. All the bare steel and skin-strengthened specimens failed predominantly due to torsional–flexural buckling mode. Additional layer of CFRP wrapping was found to enhance the axial capacity further and CF_UD-0°/BD was found to possess greater capacity in the case of double layer of CFRP. Adopting cardboard in-fill in addition to CF_UD-0° wrap has prevented the torsional mode of buckling and resulted in a peak increase of axial capacity by 192.55% and 240.61% corresponding to 500 mm and 100 mm long specimens, respectively.
K.S. Vivek, R. Baskar, and B. Asha
Elsevier BV
K. S. Vivek, U. K. L. Priyanka, and K. S. Sai Ram
Springer Nature Singapore
Mohammad Adil Dar, Ahmad Fayeq Ghowsi, A.R. Dar, Shahid Ul Salam, M. Anbarasu, K.S. Vivek, and Iman Hajirasouliha
Elsevier BV
K. S. Vivek and R. Baskar
Springer Science and Business Media LLC
K. S. Vivek, M. Adil Dar, and M. Anbarasu
AIP Publishing
K. S. Vivek and R. Baskar
Springer Nature Singapore
K.S. Vivek, T. Sreedhar Babu, and K.S. Sai Ram
Elsevier BV
Abstract In this article, the buckling behaviour of simply supported functionally graded (FG) thin square plates with triangular cut-out subjected to mechanical loading is investigated. Both uniform and non-uniform (linear triangle and trapezoidal) in-plane uniaxial compressive loadings are considered. Finite element method based on first order shear deformation theory (FSDT) is used to find out the critical buckling loads with the help of ANSYS – a commercial finite element software. Eight noded shell element with six degrees of freedom at each node is used for discretization. The material properties of the plates are assumed to vary along the thickness according to a simple power law distribution in terms of volume fraction exponent. The effects of volume fraction exponent and cut-out size for the various types of loads considered are presented. Finally, from the results it is observed that the buckling load capacity decreases with the increase in volume fraction exponent and cut-out size for the considered types of loading
K.S. Vivek, U. Kusuma Lakshmi Priyanka, C. Ravi Kumar Reddy, and K.S. Sai Ram
Elsevier BV
Abstract Steel gusset plates / gussets are extensively used in metal buildings and play a crucial role in transfer of forces but yet are most neglected in analysis and design. The inelastic behaviour of mild steel gussets is studied assuming that a diagonal member / brace subjected to a tensile force is connected to the gusset. Non-linear finite element analysis of gussets is performed with the help of a finite element software ANSYS by developing a simple model. Four noded plane stress element is used for meshing. The effects of engineering and true stress-strain curves, yield plateau, type of hardening, angle of inclination of the brace and bolt / bolt hole diameter on the in-elastic stress and strain distribution of steel gussets are discussed.
M. Kondala Rao, N. Gopika, K. S. Vivek, and C. Ravi Kumar Reddy
Springer International Publishing
Urbanization with its advantages has been constantly attracting people towards towns and cities. Land availability for providing facilities for residential and commercial activities has become a major problem. The engineering solution to this crisis has been addressed through the construction of multistoreyed buildings. Conventional structural design methods neglect the Soil-structure interaction (SSI) effects which is the major concern for risks. The differential settlements and underestimation of foundation pressure are the negative effects of SSI which are to be addressed for urban disaster risk management. In this aspect, an attempt is made in this paper to address some of the issues related to SSI. To quantify the parameters influencing the SSI, A Rectangular footing with L/B (Plan dimensions L, B) Ratios varying from 1.2 to 2 is modeled in ANSYS using SHELL63 elements. The SHELL63 element is capable of modeling the soil underneath the footing. The loss of contact of footing with soil is quantified by Relative Rigidity (RR) and Critical Relative Rigidity (CRR). The analysis is carried out by varying the eccentricity of concentrated load, plan dimension ratio and the Poisson’s ratio of soil. It is found that, as eccentricity of concentrated load increases the CRR decreases from 77 to 81%, for a particular L/B Ratio and Poisson’s ratio of footing. As the poisons ratio µ increases the CRR value decreases from 6 to 8%, for a particular L/B ratio of footing.
K. S. Vivek, M. Jugal Kishore, K.V.S. Manoj, and K.S.V.S Pujitha
IOP Publishing
In this study, free and harmonic vibration analyses of cantilever steel thin-walled tapered beams without and with web openings are performed. The analyses are carried out based on finite element method with the help of ANSYS. SHELL 63 element is used for the analyses. Tapered I - beams with symmetric and un-symmetric cross-sections are considered. Initially, free vibration analysis is performed for tapered beams without and with circular web openings to find out the effect of web openings on natural frequencies. The free vibration analysis is then followed by the harmonic analysis. The peak amplitudes and corresponding frequency ranges are presented for the considered cases. Web tapered beam of symmetric cross-section with circular web openings resulted in maximum fundamental natural frequency on performing free vibration (modal) analysis and resulted in peak amplitude at higher frequency on performing harmonic analysis among the considered cases of beams with and without web openings. Thus web openings and type of cross – section affect the dynamic behaviour.