Aparup Biswal

Bio: Aparup Biswal is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Precast concrete & Grout. The author has an hindex of 2, co-authored 2 publications receiving 12 citations. Previous affiliations of Aparup Biswal include Indian Institutes of Technology.

Investigation of Shear Behaviour of Vertical Joints Between Precast Concrete Wall Panels

Abstract: An experimental program is undertaken to study the behaviour of vertical joints between precast wall panels. The parameters such as type of transverse reinforcement in the joint, amount and distribution of joint reinforcements, shape of the joint and strength of the joint grout are considered in this experimental program. The test setup, specimens, instrumentation are reported in this paper. The results of a typical test are presented.

Performance of Precast Shear Wall Connections Under Monotonic and Cyclic Loading: A State-of-the-Art Review

Abstract: Industrialized building system (IBS) is the term used to represent the concept of prefabrication, and it has been widely used worldwide. In the last few decades, all the reinforced concrete structures in India were constructed adopting the cast-in-situ construction. Many problems were encountered during the cast-in-situ construction, such as incompletion of work at specified time due to weather conditions, design methods, lack of workmanship, congestion due to traffic, and curing time. These issues can be highly reduced by choosing precast construction as each structural element is manufactured in the factory and only erection is done at the site. This process has a considerable reduction in construction time and ensures the quality of the elements. Tall buildings are the need of the hour for affordable housing projects in India. In tall buildings, the strength and stiffness are generally provided by the wall system, which comprises shear walls. The shear wall system should be effective with wind loads and earthquake loads, if not it will lead to catastrophic failure. Connections play an important role in the lateral load resistance of the precast wall system because it is the weakest link in the precast wall system. The biggest challenge is the behaviour and possible failure of the connections due to severe lateral loads against earthquake or wind excitations. A brief review of various horizontal and vertical connections of shear walls and their behaviour under various loading conditions are discussed.

Shear behavior of steel keyed joints in precast concrete segmental bridges under direct shear loading

Abstract: Eight groups of “Z” joint specimens were designed for conducting direct shear tests on steel keyed joints. The shape, size, number and joint type of steel keys were taken as experimental parameters, and the cracking load, ultimate load, residual load, and the relationship between vertical loading force and vertical relative displacement of specimens were investigated. The results reveal that the joints relied on the mechanical occlusion between the steel keys and concrete to transmit the shear forces, the load–displacement curve of the joints had a long development course, and the joints could bear large relative displacement. The bearing capacity of steel shear keyed joints increased with the increase in diameter and material strength of the tenon. The ultimate bearing capacity of the epoxied joints with 1 and 2 steel keys were respectively 151.39%, and 69.68% higher than dry joints. Meanwhile, the epoxied joints were found to become brittle and fail in more sudden manner. After direct shear failure, the shear resistance of epoxied joints was completely provided by the steel shear key. The elastic stiffness and bearing capacity of the epoxied joints was not controlled by the number of the steel shear keys, while the dry joints were sensitive with the number of keys. By adding 1 or 2 steel shear keys to a flat joint, the ultimate bearing capacity could be increased by 3.81 and 6.06 times for dry joints, and 43% and 33% for epoxied joints, respectively.