International Journal of Engineering Research

Rajan L. Wankhade ¹, Amarsinh B. Landage ¹

Affiliations
1 Government College of Engineering, Karad-415124, Maharashtra, IN

Abstract

Analysis and design of building structures subjected to earthquake forces is complex task as earthquake forces are random in nature & unpredictable. In performance based analysis and design estimation of proper response parameters of structure is priorly considered to evaluate its performance. In the present work performance based analysis and design of building frames with earthquake loading is carried out. The performance of the structure considering potential hazards and uncertainties in assessment of the actual building responses are studied. Performance objectives are selected in performance based analysis and design followed by the development of a preliminary design. Further redesign and reassessment are carried out until the desired performance levels are achieved. Buildings frames are analyzed and redesigned by improving the reinforcement of various components of building frames. Multi storied building frames are analyzed enhancing the reinforcement of structural members in different combination as well as at different storey levels. The results of the analysis and design performed to meet required performance are presented in terms of displacement and forces.

Keywords

Performance Based Design, Seismic Analysis, Pushover Analysis.

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Rajan L. Wankhade ¹, Amarsinh B. Landage ¹, Basavraj A. Konnur ¹

Affiliations
1 Government College of Engineering, Karad-415124, IN

Abstract

Concrete is the most widely used construction material having desirable properties like high compressive strength, stiffness and durability under usual environmental condition. Also concrete is brittle and weak in tension. Plain concrete has low tensile strength and a low strain at fracture. These shortcomings have been overcome by reinforcing concrete. The properties of ordinary cement concrete are generally improved to a great extent by latex modification. Hardened cement paste mainly has an agglomerated structure of calcium silicate hydrated and calcium hydroxide bound together by the weaker forces, and therefore, micro cracks occur easily in the paste under stress. This leads to poor tensile strength and fracture toughness of ordinary cement mortar and concrete. In the present work, experimental test are carried out to calculate compression strength on cube, flexural strength on beam, spilt tensile strength on cylinder and pull out test on cube with embedded steel bar. Casting of the specimen is done in laboratory using 15% polymer (styrene butadiene rubber) with 1% to 10% of the hooked end steel fiber. The 16 mm diameter bars are used in the pull out test. All the test on hardened concrete is carried out as per the IS code of the respective test, Specimen to be casted. It is observed that by contras in the polymer modified concrete micro cracks are bridged by the polymer film on membranes which prevent cracks propagation and simultaneously a strong cement hydrate- aggregate bond is developed. As per result flexural strength and bond strength of concrete is increased with the addition of steel fiber and constant percentage of polymer.

Keywords

Polymer Modified Concrete, Styrene Butadiene Rubber, Steel Fibers.

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Rajan L. Wankhade ¹, Amarsinh B. Landage ¹

Affiliations
1 Government College of Engineering, Karad-415124, IN

Abstract

Steel fibers are now days commonly used in concrete as due to addition of these fibers considerable strength is achieved. Fiber reinforced concrete possesses desirable properties like high compressive strength, stiffness and durability under usual environmental condition. In the present work, experimental test are carried out on SBR and steel fiber reinforced concrete to calculate flexural strength on beam, spilt tensile strength on cylinder. Casting of the specimen is done in laboratory using different % of polymer(styrene butadiene rubber) with varying the hooked end steel fiber. It is observed that by changing the % steel fibers and SBR concrete a strong cement hydrate- aggregate bond is developed. Also micro cracks are bridged by the polymer film on membranes which prevent cracks propagation. As observed flexural and bond strength of concrete is increased with the addition of steel fiber and SBR.

Keywords

High Strength Concrete, Styrene Butadiene Rubber, Steel Fibers.

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