Munjal, Pankaj1 and Singh, S. B.2

1Research Scholar, Department of Civil Engineering, BITS Pilani, Pilani, Rajasthan, India, pankaj710munjal@gmail.com
2Professor, Department of Civil Engineering, BITS Pilani, Pilani, Rajasthan, India, sbsinghbits@gmail.com

ABSTRACT

The flexural response of reinforced masonry beams with FRP rebars are investigated experimentally. Masonry beams are made in different ways with cement mortar as a bed joint. Masonry beams of 150 x 230 mm cross-section and 1300 mm length were cast using locally available burnt clay bricks and cement mortar of proportions 1:3 (cement: sand) as bed joint. In each beam, two layers of burnt clay bricks were inserted having five brick units in each layer with four mortar joints, each of approximately 20 mm thickness. The thickness of top, bottom and end cover of the beam is maintained as 30 mm with cement mortar. These masonry beams were reinforced with two types (pultruded and hand-layup) of carbon fiber reinforced polymer (CFRP) bars of 8 mm diameter. These masonry beams were tested for four-point bending and loaded monotonically up to failure. Flexural capacity, deformation, and crack patterns of tested control masonry beams and CFRP reinforced masonry beams are compared and discussed. This paper demonstrates various failure patterns developed during the four-point bending. The experimental results show that CFRP reinforcement increases the load carrying capacity and deformation capacity. Moreover, effectiveness of types of CFRP rebars (pultruded and hand-layup) on the flexural strength of masonry beams are discussed based on experimental results.

KEYWORDS: carbon fiber reinforced polymer (CFRP), cement mortar, flexural strength, handlayup, masonry beam, pultruded

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