By means of on-siteinvestigation, inspection,interior experiments, theoreticalanalysis and calculation, a detailed analysisis carried out on the causeof the partialcollapse accident about a waste-heat boiler steel structure in a cement plant of Hunan province of China. The resultsof inspectionand analysis show that: as a key part of load transfer, the connection weld of long thin steel plate is poor in quality, meanwhile, the detail of beam-column connection can not meet the requirement of rigid joint stipulated by the design, which are the main causes for the collapse accident of boiler steel...
