VOLUME: 07, Special Issue 07, Paper id-IJIERM-VII-VII, October 2020
62STUDY OF FLOORING SYSTEM MADE-UP OF STEEL WITH CONCRETE Silambarasan P.1, P.C. Diwan2
1Research Scholar, Dept. of Civil Engineering, SVN University, Sagar, (M.P)
2Assistant Professor, Dept. of Civil Engineering, SVN University, Sagar, (M.P)
Abstract:- Currently the composite action is mainly achieved by headed shear connectors welded to the top flange of the beam, obstructing the non-destructive demount ability. Demount-able shear connectors can be used in order to open up the composite construction for reusability. Demountables hear connectors can take the form of a bolted connection which requires a tight control of construction tolerances.
This thesis is focused on studying a bolt coupler connector which is seen as a valuable alternative to the more conventional embedded bolt. The proposed shear connector consists of a bolt and coupler embedded in prefabricated concrete decks which are connected through the top flange of the steel section by an injection bolt.
1. INTRODUCTION
Environmental concerns steer the construction industry towards more sustainable designs. Steel-concrete composite beams are a popular solution in current design practice due to their efficient material use and competitive construction. However, commonly used welded connectors obstruct the non-destructive separation or require time consuming and labour intensive processes to separate the concrete slab from the steel member. Demoun tables hear connectors can open up the possibility of reuse in composite floorings.
2. SUSTAINABILITY IN CONSTRUCTION
The construction industry is responsible for 40% of the primary energy use and 36% of the energy related CO2 emissions in industrialized countries [1]. Figures from 2009 [2] indicate a CO2 emission on a global scale due to construction activities of 5.7 billion tons. In 2014, the waste generated by all 28 European Union member states summed up to an all-time high of 2503 million tonnes, with the construction sector contributing up to 34.6 % according to[3].
Figure 1 Waste generation by economic activities and households, EU-28, 2014 [3]
VOLUME: 07, Special Issue 07, Paper id-IJIERM-VII-VII, October 2020
63Figure 2 The virtuous circle: Design for deconstruction and reuse [6]
3. RESULTS
3.1 Construction Method
Figure 3 Construction method - Threaded rods
Figure 4 Bolts acting as support points 4. CONCLUSIONS
1. Experimental research confirms that the construction of demountable composite flooring systems consisting of large prefabricated decks is feasible if construction tolerances are designed appropriately.
2. The construction tolerances are achieved b using oversized holes.
The hole clearance design is influenced by:-
a. Deformability of the system during construction in the form of end slip,
b. Imperfections of the beam and deck in longitudinal and transversal direction,
c. Speed of execution and demounting.
d. The most influential imperfection is the spacing of the couplers in the deck and the beam holes in longitudinal direction. According to [11] and confirmed by measurements, the spacing deviations can be up to 2mm, so the hole clearance should be increased by at least 8mm to account for these imperfections.
