Browsing by Author "Yajnheswaran, B."

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    Effect of stiffness on performance of a diaphragm wall with irregular configuration
    (National Institute of Science Communication and Policy Research, 2018) Yajnheswaran, B.; Rao, S.
    Present study investigates the influnces of the stiffness on the performance of a lateraly loaded R.C.C diaphragm wall and an inter-comparison has been made between the actual and compound sections by modelling the wall using Plaxis 3D software. Displacement and bending moment are found out for diaphragm walls and results are compared with the actual diaphragm wall section having 1.1m thick.The study concludes that when two sections of different stiffness are coupled to form a single section, the stiffer member takes higher bending moment and the magnitude depends the stiffness of the thinner member. © 2018, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.
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    Effect of stiffness on performance of diaphragm wall
    (2015) Yajnheswaran, B.; R, A.P.; Rajasekaran, C.; Rao, S.
    Diaphragm walls are generally constructed using stiff concrete of same stiffness throughout. Research has shown that as wall flexibility increases, the stress imposed by the soil redistribute and reduces structural forces on wall. Approximately five fold reduction in maximum bending moment occurred when wall stiffness was reduced from that of a 1m concrete section to that of a Frodinghamn1N sheet pile. Unfortunately this beneficial effect is accompanied by greater wall and soil movements (Potts & Day, 1991). So the diaphragm wall cannot be too flexible also. In this paper static analysis of two different diaphragm wall sections of varying stiffness is carried out using PLAXIS software for the load condition existing at deep draft berth of New Mangalore Port, and the performances of these sections are compared with previous study performed by Yajnheswaran et al. (2015). The diaphragm wall sections used in analysis are modeled as single panel. The length of the panel is taken as 5m. Anchors are provided at +2.5m. Soil layer details are obtained from boreholes at NMPT. � 2015 The Authors. Published by Elsevier Ltd.
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    Effect of stiffness on performance of diaphragm wall
    (Elsevier Ltd, 2015) Yajnheswaran, B.; R, A.P.; C, C.; Rao, S.
    Diaphragm walls are generally constructed using stiff concrete of same stiffness throughout. Research has shown that as wall flexibility increases, the stress imposed by the soil redistribute and reduces structural forces on wall. Approximately five fold reduction in maximum bending moment occurred when wall stiffness was reduced from that of a 1m concrete section to that of a Frodinghamn1N sheet pile. Unfortunately this beneficial effect is accompanied by greater wall and soil movements (Potts & Day, 1991). So the diaphragm wall cannot be too flexible also. In this paper static analysis of two different diaphragm wall sections of varying stiffness is carried out using PLAXIS software for the load condition existing at deep draft berth of New Mangalore Port, and the performances of these sections are compared with previous study performed by Yajnheswaran et al. (2015). The diaphragm wall sections used in analysis are modeled as single panel. The length of the panel is taken as 5m. Anchors are provided at +2.5m. Soil layer details are obtained from boreholes at NMPT. © 2015 The Authors. Published by Elsevier Ltd.
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    Non-linear analysis of 3D interaction of soil-diaphragm wall structure with different cross-sections
    (CESER Publications Post Box No. 113 Roorkee 247667, 2016) Yajnheswaran, B.; Rao, S.
    Diaphragm walls have been used throughout the world to construct deep underground structures, conventionally by using the Reinforced Cement Concrete (RCC).Stiffer walls attracts larger bending moment than flexible walls (Potts & Day, 1991). Research has shown that increase in wall flexibility increases displacement, hence reduction in bending moment. In this paper static analysis of diaphragm wall sections having different stiffness are carried out using PLAXIS 3D software for the load condition existing in deep draft berth of New Mangalore Port, India. The displacement and bending moment are found out for diaphragm wall sections and results are compared with the actual diaphragm wall section having 1.1m thick. For analysis, a single panel diaphragm wall section having 5m length with 2.5m center to center spaced anchors is modelled. Soil properties are considered as per the boreholes data’s obtained from New Mangalore Port. The results are validated with values derived from the design chart. © 2016 by International Journal of Ecology & Development.