BILATERAL INTERFERENCE OF WIND LOADS INDUCED ON DUPLICATE BUILDING MODELS OF VARIOUS SHAPES

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SUPRIYA PAL
RITU RAJ RITURAJ
ANBUKUMAR S

Abstract

THE CURRENT INVESTIGATION FOCUSES ON THE RESULTS OF AN EXPERIMENTAL INVESTIGATION OF SQUARE-PLAN-SHAPE AND REMODEL-TRIANGLE-SHAPE BUILDING MODEL’S VARIED INTERFERENCE CONDITIONS BETWEEN DUPLICATE BUILDING MODELS ON WIND-INDUCED PRESSURE AND BASE MOMENTS. THE STUDIES WERE CONDUCTED OUT IN A BOUNDARY LAYER WIND TUNNEL WITH A 1:300 SCALE MODEL FOR TOTAL BLOCKING OF OBSTRUCTIVE MODEL SITUATIONS. FOR ALL INTERFERENCE CIRCUMSTANCES, THE SPACING BETWEEN THE DUPLICATE BUILDING MODELS IS FIXED AT 10% OF THE HEIGHT OF THE INSTRUMENTED MODEL. UNDER CURRENT WORKING CONDITIONS, THE STUDY CONCLUDES THAT -1 > INTERFERENCE FACTOR > 1 AS EXPERIENCED BY THE REMODEL-TRIANGLE-SHAPE MODEL RESULTS IN REDUCED PERFORMANCE OF THE INSTRUMENTED MODEL AS OPPOSED TO THE SQUARE-PLAN-SHAPE MODEL. FRONT-TO-FRONT INTERFERENCE CONDITION OF REMODEL-TRIANGLE-SHAPE MODEL HAS THE BEST OVERALL PERFORMANCE IN ALONG-WIND AND CROSSWIND DIRECTIONS, WHEREAS FRONT-TO-BACK INTERFERENCE CONDITION OF REMODEL-TRIANGLE-SHAPE MODEL HAS THE BEST TORSIONAL PERFORMANCE. BACK-TO-BACK INTERFERENCE OF A REMODEL-TRIANGLE-SHAPE MODEL SHOULD BE AVOIDED BECAUSE THE ORIENTATION OF DUPLICATE MODELS ATTRACTS THE MOST OVERTURNING MOMENTS IN BOTH THE ALONG-WIND AND CROSSWIND DIRECTIONS OF ALL INTERFERENCE CONDITIONS INVESTIGATED IN THIS STUDY.

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