钢筋混凝土框架“强柱弱梁”抗震措施的试验研究
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摘要
针对历次震害中钢筋混凝土框架结构的梁柱节点容易破坏的问题,本文进行了4个足尺框架梁柱组合节点试件的低周反复荷载试验。重点研究了不同柱梁强度比值对钢筋混凝土框架抗震性能的影响。结果表明,提高柱梁抗弯强度比值可以更好地保证梁端率先出现塑性铰,有效减小节点核心区和柱端的破坏程度,进而提高水平地震作用中框架节点的延性。
The beam-column joints in a reinforced concrete frame are vulnerable to damage caused by seismic events.This paper introduces four full-scale beam-column joints with different ratio of bending moment of column to beam tested under reversed cyclic loading.The test results with higher ratio developed plastic hinges earlier in beams,effectively reduced damages in joint core and column and test joints exhibited better ductility capacity under lateral seismic loading.
The beam-column joints in a reinforced concrete frame are vulnerable to damage caused by seismic events.This paper introduces four full-scale beam-column joints with different ratio of bending moment of column to beam tested under reversed cyclic loading.The test results with higher ratio developed plastic hinges earlier in beams,effectively reduced damages in joint core and column and test joints exhibited better ductility capacity under lateral seismic loading.
引文
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[2]New Zealand Standard.NZS 3101:Part 1-the Design of Concrete Structures[S].Standard Council,1995.
[3]CEN.European Prestandard Eurocode 8:Design provisions for earthquake resistance of structures.Brussels [S].1994.
[4]刘小映,李凤武,范云蕾.我国混凝土结构“强柱弱梁”抗震措施合理性分析[J].福建建设科技, 2007,03:32-33. Liu X Y,Li F W,Fan Y L.Rationality analysis on seismic fortification measures about“trong columnweak beam”for concrete structures in China[J].Fujian Construction Science & Technology,2007, (03 ):32-33(in Chinese ).
[5]中华人民共和国建设部.GB 50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2008. Ministry of Construction of the People's Republic of China.GB 50011-2001 Code for seismic design of buildings[S].Beijing:China Architecture and Building Press,2008.
[6]中华人民共和国建设部.JGJ 101-96建筑抗震试验方法规程[S].北京:中国建筑工业出版社, 1997. Ministry of Construction of the People's Republic of China.JGJ 101-96 Specificating of Testing Methods for Earthquake Resistant Building[S].Beijing:China Architecture and Building Press,1997.
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