International Journal of Innovative Technology and Exploring Engineering (IJITEE) ISSN: 2278-3075, Volume-9 Issue-11, September 2020 104 Published By: Blue Eyes Intelligence Engineering and Sciences Publication Retrieval Number: 100.1/ijitee.K77050991120 DOI: 10.35940/ijitee.K7705.0991120 Abstract: Ferrocement-LGS (Light Gauge Steel) composite construction is recently proposed novel form of construction as a substitute to traditional RCC framed construction. In this construction form, walls of the building behave more or less like a shear wall in resisting in-plane lateral loads. The present paper attempts to propose a simplified mathematical model for obtaining response of composite wall under in plane lateral loading. As first part of present work, in-plane force deformation behavior of Ferrocement-LGS composite wall panel is predicted through FEM analysis (ANSYS). This force deformation curve was employed to estimate equivalent spring parameters of simplified mathematical model (ETABS) of composite walls. The simplified mathematical model saves significant computational efforts in predicting the in-plane response compared to the traditional FEM model without compromising the accuracy. Keywords: Ferrocement and LGS Composite, Ferro composite section, Composite Structures, Mathematical Model, In-plane loading I. INTRODUCTION Modern construction techniques are the require of rapidly growing construction industry. For better performance, cost effectiveness and rapid construction solutions various researches are being carried out in all parts of the world. Ferrocement is one such area which is gaining importance due to its promising results from studies all across the world. Ferrocement is a form of thin reinforced mortar members in which a cement-sand mortar mix is reinforced with closely spaced layers of thin iron wire grid or small diameter bars, uniformly distributed throughout the matrix of the composite member. Ferrocement has marked a significant place among the different material in construction, due to its properties such as strength and durability, primarily, its small thickness, which turns it to be material suitable for constructing many lightweight structures. Ferrocement finds to be an economic alternative material for walls & roofs of the building. In steel, there are primarily two main families of structural members. One is the popular group of hot-rolled sections of steel built out of plates. The other, less popular but of growing importance is composed of sections cold formed from steel (LGS) strips, plates, sheets, or flat bars formed in roll-forming. machines or by press brake or bending brake Revised Manuscript Received on September 05, 2020. * Correspondence Author Nishant Sarjerao Jadhav, Student, School of Civil Engineering, MITWPU, Pune, India. E-mail: jadhavnishant.sn@gmail.com Amrut Anant Joshi, Assistant Professor, School of Civil Engineering, MITWPU, Pune, India. E-mail: amrut.joshi@mitwpu.edu.in operations. These are cold-formed light gauge steel (LGS) structural members. Ferrocement-LGS composite structures is newly introduced construction technique in which ferrocement wall panels with (LGS) strips, plates, sheets, or flat bars formed in roll-forming. LGS sections can be used as alternative to the traditional RC structures with Infilled masonry walls. In this recent form of structure, walls of the building behave more or less like shear walls. Therefore, its response to the in-plane loading need to be predicted. To predict this, analytical modeling of the composites finds out be a good approach. Finite element modelling of such materials involves complicated details and marathon work. Therefore, the idea of developing a simplified model makes it easy, cost effective and time saving way to predict the behavior of such complicated geometry. A. Madan, et. al. (1997) proposed a macro-model for masonry infills based on an equivalent diagonal strut. Francisco J. Crisafulli et. al. (2007) proposed a macro-model in order to represent the effect of masonry infill panels. The model implemented as a 4-node panel element which connected to the frame at the beam-column joints. This assembly allowed adequate consideration of the lateral stiffness of the panel and of the strength of masonry panel. Alireza Mohayeddin et. al. (2013) – proposed a three-dimensional finite element model of a reinforced-concrete frame with an infill panel. It was concluded that a dynamic strut model would be a more appropriate replacement for the infill panel than a single strut. Nima Usefi, et. al. (2019) reviewed various methods of modelling cold formed steel-framed walls. Based on their review of number research studies concluded that analysis of well-developed macro-models can give the fairly accurate results as that of micro models. The preset paper aims to propose a simplified mathematical model to predict response of ferrocement-LGS composites to in-plane loading. In this, the ferrocement panels, are arranged as cladding on both sides of LGS sections due to its flexure and tension carrying capacity. This construction form involves mainly two elements, as follows: a) Ferrocement panels (600 mm X 900 mm X18 mm) b) Light Gauge Steel (LGS) In practice, these constituents can be connected using polymer-based binder and self-tapping screws at regular spacing as shown in fig. 1c Simplified Mathematical Model to Predict Response of Ferrocement-Lgs Composite Wall to In-Plane Loading Nishant Sarjerao Jadhav, Amrut Anant Joshi