N. Parthasarathi ¹, K. S. Satyanarayanan ¹, M. Prakash ¹, Sunumol Sulaiman ¹

Affiliations
1 Department of Civil Engineering, SRM University, Kattankulanthur, Tamil Nadu, IN

Abstract

Objective: To study and compare the behaviour of half-cuboctahedron grid and hexagonal grid tensegrity system. Methods/ Statistical Analysis: Ever since the discovery of tensegrity, most works have been concentrated on the classification and form finding techniques but very less on the mechanics of these structures. This study focus on the behaviour of two basic tensegrity modules, the half-cuboctahedron and hexagonal. Findings: Later, the study has been extended to tensegrity grids of spans 2x2, 4x4 and 8x8 of both the configurations (hexagonal modules and half-cuboctahedron modules) which were developed using an FEM based software. The grids were compared on the basis of nodal displacements and member forces, resulting in the half-cuboctahedron grid to be a more feasible configuration for large span roof structures. Applications/ Improvements: The application of the tensegrity structure is to applied in the large span roof structures.

Keywords

Form Finding, Half-cuboctahedron, Hexagonal, Member Forces, Nodal Displacements, Tensegrity.

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M. Prakash ¹, U. Gowshika ², T. Ravichandran ³

Affiliations
1 Department of Information Technology, Jeppiaar Institute of Technology, Chennai – 631604, Tamil Nadu, IN
2 HCL Technologies, Chennai – 600096, Tamil Nadu, IN
3 Department of Electronics and Communication Engineering, SNS College of Technology, Coimbatore – 641035, Tamil Nadu, IN

Abstract

Objective: The main objective is to develop a smart device, which is integrated in order to help the aged people during the time of medical emergency situations using Internet of Things (IoT). Methods: The technical methodology implemented is to develop a smart device which works on the basic support of the android application. The device serving people in danger is built using the smart phone applications, Bluetooth transmitter and receiver and microcontroller (Kiel micro vision). Kiel micro vision is an integrated development environment used to create software to be run on embedded system (like a microcontroller). Effective Quality of Service (QoS) is achieved using the concept of IoT. Findings: The concept of IoT is implemented in order to develop an environment which provides a unique way to communicate and transfer data from one end to the other end. The Internet of Things is a new way implementation in the field of medical background, which acts as a media for information retrieval from physical world to digital world, which is enhanced by the support of android platform. Hence the embedded system together constitutes two devices: Stationary device and a Movable device. The Stationary device is inbuilt with an ATMEL Microcontroller, RF Receiver, Bluetooth module, Step-down transformer, an LCD display, Voltage regulator, resistors and Capacitors. The movable device is inbuilt with two buttons along with a RF Transmitter. Application: The smart device for alerting a person’s critical health condition is of good use as it is less expensive and easy to handle, since the people in need are helped in the right time. Moreover this system can also alert our neighborhood even in situations like robbery. The Stationary device which the person is handling can be made as a device attached to human body, say a watch. The size of the device is made smaller, even though the cost becomes higher. Call features also added instead of message feature because everyone looks on text message.

Keywords

Android, Bluetooth, Internet of Things, Kiel Micro Vision, RF Transmitter and Receiver, Smart Device

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M. Sakthi Seethalakshmi ¹, M. Prakash ¹, K. S. Satyanarayanan ¹, V. Thamilarasu ¹

Affiliations
1 Department of Civil Engineering, SRM University, Chennai – 603203, Tamil Nadu, IN

Abstract

Background/Objectives: Progressive collapse occurs when primary structural element fails due to many reasons such as impact, bomb blast, earthquake, abnormal loading etc., resulting in the failure of adjoining structural elements, which in turn causes partial or total collapse of the structure consequently. It is studied widely in Reinforced Concrete (RC) framed structure. Methods/Statistical Analysis: The present study investigates the comparative behaviour of four bay, five storey RC bare frame, infilled frame and infilled frame with openings and to assess the effect of infill to resist the progressive collapse. A linear static analysis is carried out using finite element software using SAP 2000 and maximum moment (M), shear force (V), axial force (P), deflection (U) for both beams and columns generated before and after middle column removal are studied and compared. Findings: There is an average of 30% and 34% decrease in moments for infilled frames when compared to a bare frame. The percentage of decrease in moments increases to an average of 71% when the column is removed. Similarly, the deflection for infilled frames decreases by35% when compared with bare frame and only 17% increase when infills are provided with openings on removal of column there is average of 88% decrease in deflection for infilled frames when compared with bare frame. It shows that the presence of infilled frames will delay the progressive collapse when compared to bare frames. Application/Improvements: The study can be extended to the non-linear range and also to find its dynamic response.

Keywords

Infilled Frame and Infilled Frame with Openings, Progressive Collapse, RCC Frame

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