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填充墻失效可控的結構整體抗震能力提升方法*
楊偉1,歐進萍1,2
摘 要
(1 哈爾濱工業(yè)大學深圳研究生院,深圳 518055;2 大連理工大學土木水利學院,大連 116024)
[摘要]結構失效模式對應結構整體抗震能力,結構失效時所對應的最小地震作用作為結構的整體抗震能力。通過推覆分析(Pushover)找到結構的失效模式,從而為布置失效填充墻提供信息,通過布置失效填充墻,可改變并消除原有結構的最弱失效模式,從而提高結構的整體抗震能力;通過增量動力時程分析,可最終確定失效填充墻的最佳布置方案及結構的整體抗震能力指標,但填充墻的大量破壞會影響到結構的使用功能。通過在梁下部和填充墻頂部之間布置鉛阻尼器既可有效地保護失效填充墻,又能使結構的整體抗震能力得以提高。算例說明了本文提出的分析方法的先進性和可行性,研究結果表明,考慮失效填充墻的作用能夠使結構的整體抗震能力得到提高,鉛阻尼器能夠使失效填充墻的破壞得到有效控制。
[關鍵詞]失效模式;填充墻失效可控;整體抗震能力;推覆分析;增量動力時程分析
中圖分類號:TU375.6文獻標識碼:A文章編號:1002-848X(2011)08-0034-06
A method of improving global seismic capacity based on failure-controlled of infill walls for infilled structures
Yang Wei1, Ou Jinping1, 2(1 Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China; 2 Dalian University of Technology, Dalian 116024, China)
Abstract:The seismic capacity of building is corresponding to the weakest failure mode of building. The minimum earthquake action, under which structure arises the weakest failure mode, is called the global seismic capacity (GSC) of structure. Pushover analysis was carried out to find the failure mechanism of structure, which offered the information for placing allowed failure of infills (AFIs). Then, the weakest failure mode was eliminated for placing AFIs and GSC of structure was improved in the end. The optimum placing plan of AFIs and GSC index can be both obtained due to lots of incremental dynamic analysis (IDA). However, damage of AFIs would cause function loss of building. Shearing lead damper was then adopted to protect AFIs from immediately damage. Also, the GSC of structure was improved at the same time. The example shows that this method is advanced and feasible. The results indicate that GSC of infilled frames was greatly improved by considering the function of AFIs, and  the failure of AFIs was controlled by using shearing lead damper.
Keywords:failure mode; failure-controlled of infill walls; global seismic capacity; Pushover; incremental dynamic analysis
*國家重點基礎研究發(fā)展(973)計劃項目(2007CB714202)。
作者簡介:楊偉,博士研究生,Email:ywluck@126.com。
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