本文選題：冷卻塔　切入點(diǎn)：檢測(cè)鑒定　出處：《防災(zāi)減災(zāi)工程學(xué)報(bào)》2017年01期

【摘要】：某冷卻塔已使用20多年,存在一定程度的老化和破損,對(duì)其外觀缺陷、混凝土碳化程度、鋼筋銹蝕程度及傾斜度等進(jìn)行檢測(cè)鑒定,應(yīng)用有限元方法,計(jì)算該冷卻塔在風(fēng)荷載、溫度作用、重力荷載單獨(dú)作用和組合作用下的內(nèi)力和變形,并取組合作用進(jìn)行整體穩(wěn)定性和局部穩(wěn)定性分析,驗(yàn)算塔身裂縫發(fā)展情況。結(jié)果表明,冷卻塔剛度、承載力、安全系數(shù)、整體穩(wěn)定性和局部穩(wěn)定性均能滿足現(xiàn)行規(guī)范的規(guī)定,塔身裂縫除局部筒壁不滿足最大裂縫寬度限制的要求外,其它范圍均滿足。根據(jù)檢測(cè)鑒定及有限元計(jì)算結(jié)果,對(duì)冷卻塔采用粘碳纖維布、混凝土表面防碳化處理、鋼筋除銹防銹等加固補(bǔ)強(qiáng)措施。
[Abstract]:A cooling tower has been in use for more than 20 years, and there exists some degree of aging and breakage. The external defects, the degree of concrete carbonization, the degree of corrosion of steel bar and the inclination of the cooling tower are tested and identified, and the wind load of the cooling tower is calculated by using finite element method. The internal force and deformation under the action of temperature and gravity load alone and combined, and the integral stability and local stability of the combined action are analyzed to check the development of the cracks in the tower body. The results show that the stiffness and bearing capacity of the cooling tower, The safety factor, global stability and local stability can all meet the requirements of the current code. Except for the requirement of the maximum crack width limit on the local cylinder wall, the other ranges are satisfied. According to the results of inspection and identification and finite element calculation, The cooling tower is strengthened with carbon fiber sticky cloth, anti-carbonization treatment of concrete surface, rust and rust removal of steel bar and so on.
【作者單位】： 武漢大學(xué)土木建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51578428)資助
【分類號(hào)】：TQ051.5

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