Critical Study of Wind Effect on RC Structure with Different Permeability

Abstract

AbstractWind load is one of the significant loads that affect the design of a structure. Therefore, to analyze and design a building considering the effect of wind load, it is necessary to calculate the wind speed and pressure for different heights of buildings with different geometry. In the current building codes and design standards, internal stresses are insufficiently defined, primarily due to the complexities involved in their assessment, but play an important role in the design of buildings and cladding. The category of the building with a single dominant opening is usually considered critical for wind load design. However, the correct assessment of internal pressure behavior for buildings with cross-openings of realistic wall porosities is essential. In this paper, the reinforced concrete framed structure is analyzed for three classes of structure, i.e., Class A, B, and C with the constant base dimension; with varying heights of the structure; having four bays in each direction, and ceiling height of 3 m. All the models are analyzed for three different basic wind speeds, i.e., 33, 44, and 55 m/s with three different permeabilities, i.e., <5, 5–20, and >20% for different terrain categories specified in respective standards. The influence of the wind load response in terms of axial force, bending moment, and peak deflections are calculated and compared. It is observed that the effect of terrain category and permeability is not significant in centrally located columns. However, in corner columns, the axial forces are not constant. It increases with the increase in wind speed, permeability, and reduces from terrain category 1–4. Also, significant co-relation between forces and displacement was observed for less than 5% permeability, wind speed of 33 m/s, and terrain category 1.KeywordsPermeabilityRC structureTerrain categoryWind load