Academic journal article American Academic & Scholarly Research Journal

Finite Element Analysis of Composite Roof System Subjected to Various Loading by ANSYS 13.0

Academic journal article American Academic & Scholarly Research Journal

Finite Element Analysis of Composite Roof System Subjected to Various Loading by ANSYS 13.0

Article excerpt

Abstract. In recent years the use of advanced composite materials has gained wider space in the civil engineering sector, due to some favorable characteristics such as lightweight, high specific strength, resistance to corrosion and fatigue. In this work, a new slab system composed of brick masonry is analyzed for finite element method by ANSYS 13.0. Brick masonry is one of the oldest building materials comparative superior to other alterative in terms of appearance, durability and cost. Brick masonry slab is durable, fire proofing, easy to construct, free from corrosion of reinforcement due to saline effect and in most cases it results in the increase of floor space due to adoption of brickwork or lesser thickness. In addition to tremendous use of bricks for low cost housing in Bangladesh, its use is getting popularity both in high rise structures and in factory buildings. As Finite Element Analysis (FEA) is a preferred method to analyses the behavior of brick slab, commercial finite element analysis software ANSYS 13.0 is used to analyses the structural performance of the brick slab model under static and dynamic loading. Masonry slab under various load showed strong enough to tackle load induced on it.

Keywords: ANSYS, Composite roof system, Finite element analysis, Masonry slab, Static analysis.

1 INTRODUCTION

The construction of stone, brick or tile which is hardened by heat is termed as masonry. It may be defined as building units bonded together with mortar [1], Brick masonry is one of the oldest building materials comparatively superior to other alternatives in terms of appearance, durability and cost [2], In residential buildings, roof system is a vital part. Composite slab made of brick and plain concrete with or without beam are found to be practiced in locally made housing roof for low cost interest [3], It was therefore felt to investigate the local carrying capacity of different type of masonry slab (without reinforcement). Different physical or mechanical properties are analyzed for brick slab by Finite Element Analysis (FEA) method under various static and dynamic loading by creating a model in ANSYS 13.0.

The Finite Element Analysis (FEA) method, originally introduced by Turner et al. [4], is a powerful computational technique for approximate solutions having complex domains subjected to general boundary conditions [5], In recent years, however, the use of finite element analysis has increased due to progressing knowledge and capabilities of computer software and hardware. It has now become the choice method to analyze structural components. The use of computer software to model these elements is much faster, and extremely cost-effective [6],

To fully understand the capabilities of finite element computer software, one must look back to experimental data and simple analysis. Executing the necessary checks along the way is a key to make sure that what is being output by the computer software is valid.

This study presents the mechanical properties of masonry slab. A masonry slab span of 5ft χ 10ft with a thickness of 3 inches was analyzed by finite element method in ANS YS 13.0. The masonry slab was analyzed under uniformly distributed loading, concentrated loading, impact loading and cyclic loading. The results showed that deformation and stress level of masonry slab is within limit when subjected to more than eight times of standard slab loading. This makes the masonry slab safely usable in residential buildings as general slab without any application of reinforcement.

2 METHODOLOGY

Roof system of a residential building is an indispensable part. There are several types of roof system which are usually constructed in rural and urban areas namely, conventional R.C.C. slab beam, wooden rafter and beam covered with tile followed by lime surki mortar finish, brick masonry roof reinforced by mils steel bar or other indigenous material. Sometime unreinforced brick masonry is found to be constructed from long past. …

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