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（同濟大學建筑設計研究院（集團）有限公司， 上海 200092）
［摘要］大連電視塔經(jīng)歷1997年火災后，在后期使用過程中觀察到部分鋼結構構件發(fā)生彎曲，并有逐漸惡化的趨勢，在此情況下2010年對電視塔主體鋼結構進行了整體變形和構件彎曲的檢測，發(fā)現(xiàn)構件變形遠大于規(guī)范要求。在本次檢測的基礎上，設計了帶有伸縮節(jié)的置換構件和臨時支撐構件，并在采用了結構應力監(jiān)測措施的條件下對彎曲構件和薄弱部位的共48根環(huán)向構件和2根斜向構件進行了置換。置換過程中，置換構件、臨時支撐以及相鄰兩跨的結構應力變化均保持較低水平，僅為25MPa。此后，連續(xù)3年對大連電視塔結構整體變形和構件進行了檢測，沒有發(fā)現(xiàn)不良結構整體變形和構件彎曲，進一步證明了此高聳結構的構件修復置換設計的合理性。
［關鍵詞］電視塔； 結構檢測； 構件置換； 臨時支撐； 伸縮節(jié)； 應力監(jiān)測
中圖分類號：TU392-6文獻標識碼：A文章編號：1002-848X(2016)14-0085-06
Structural inspection, repair and member replacement research on Dalian TV tower
Liang Feng
（Tongji Architectural Design (Group) Co., Ltd., Shanghai 200092, China）
Abstract:A fire was encountered in Dalian TV tower in 1997, and in the later service process, bending of parts of steel structural members was observed and there was a trend of gradual deterioration. In this case, overall deformation and member bending tests on the main steel structure of TV tower were carried out in 2010, to find that the deformation of the components was far greater than the requirement of the specification. On the basis of the test, structural replacement member with length regulation joint as well as temporary supporting members were designed, and flexural members as well as a total of 48 circular members and 2 oblique members in weak parts were replaced under the condition of structural stress monitoring measures. In the process of replacement, the structure stress changes of the replacement member, temporary supporting member and the adjacent two span structures maintained at a low level of only 25MPa. Thereafter, for three consecutive years, structure deformation and components of Dalian TV tower were detected, to find no adverse structural deformation and members flexure, which provided further evidence that the repair and replacement design of the tower structure components are reasonable.
Keywords:TV tower; structural inspection; structural member replacement; temporary supporting member; length regulation joint; strain monitoring
作者簡介：梁峰，博士，高級工程師，一級注冊結構工程師，Email：16034959@qq.com。
