Abstract
A safety assessment of a chimney under the action of wind and earthquake is performed on one of the reinforced concrete chimneys in the Jinchuan company in China. The assessment is based on the linear filtering method, and wind loads of several heights on one field are simulated by MATLAB. The displacement of the structure under the action of wind load and earthquake is analyzed using maximum value superposition, and the stress on the chimney is calculated in four cases using the equal curvature criterion method. The time‐history responses of the tall chimney structure under linear and nonlinear elastic conditions are discussed. The results show that for a chimney under wind load or frequent earthquakes, the displacement limit can meet the code requirements; however, under the combined action of frequent earthquakes and wind load, the structural displacement is bigger than other conditions. When the chimney is acted upon by a wind load, frequent earthquake action, or the combined action of wind load and frequent earthquake action, the maximum compressive stress, maximum tensile stress, and maximum shear stress are concentrated at the bottom of the chimney. The ultimate bearing capacity of a reinforced concrete chimney under three conditions can meet the original design requirements, but the maximum compressive stress at the bottom approaches the designed tensile limit value under the action of rare earthquakes; under these conditions, the bottom of the chimney may experience partial damage.
Highlights
Reinforced concrete (RC) chimneys are an indispensable structure in industrial buildings, and their structural safety directly determines the safety of surrounding buildings and people
E maximum bearing capacity occurs at the structure bottom under the combined response to earthquake and wind load, and the ultimate bearing capacity of the RC chimney meets the requirements under the combined action
Based on the linear filtering method, the wind load of several heights on one field is simulated by MATLAB, the displacement of the structure under the action of wind load and earthquake is analyzed, and the stresses of the chimney in three cases are calculated. e main conclusions are as follows: (1) With the increase of chimney height, the time at which the extreme value of displacement occurs consistently decreases. e extreme displacement value of an RC chimney meets the requirements under wind or earthquake, and the displacement meets the specified limit under the combined action of wind and earthquake
Summary
Reinforced concrete (RC) chimneys are an indispensable structure in industrial buildings, and their structural safety directly determines the safety of surrounding buildings and people. Significant research has been carried out regarding the dynamic response and safety evaluation of RC chimneys under earthquakes and wind. Liu and He [1] analyzed the response of chimneys under the combined action of horizontal and vertical earthquake motion. The current research is mainly focused on the design and theoretical analysis of chimneys, and only seismic action or wind load is analyzed. Ere are no relevant reports on the dynamic response and safety evaluation of existing concrete chimneys under earthquakes and wind loads. Erefore, in this paper, the dynamic response of existing concrete chimneys under earthquakes and wind load is analyzed, and the safety performance of a chimney is evaluated
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