轻骨料混凝土与普通混凝土框架结构的抗震性能分析
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(长沙理工大学土木与建筑学院,长沙 410076)[摘要]基于轻骨料混凝土对普通混凝土框架结构作等截面代换的研究,提出了结构底部弹性层间位移放大系数及地震力放大系数的简化计算公式。研究表明,当采用的轻骨料混凝土的强度以及密度等级足够高时,框架结构的抗震性能并不会降低,且结构自重的降低、混凝土抗压强度的提高以及地震力的减小将使工程造价有所降低。[关键词]轻骨料混凝土;框架结构;层间位移;抗震性能Seismic performance analysis of lightweight aggregate and ordinary concrete frame structuresLiu Zhefeng, Su Zhili, Yang Weijun(School of Civil Engineering and Architecture, Changsha University of Science and Technology,Changsha 410076,China)Abstract:Based on the research of substituting lightweight aggregate concrete (LWAC) for ordinary concrete in frame structures by the rule of uniform section, simple methods used to calculate the amplification coefficients of seismic force and elastic story displacement of structure bottom were proposed. The results show that the seismic performance of LWAC frame structures will not decrease when the LWAC is high enough in intensity and density, and the lower structure deadweight and seismic force as well as the higher concrete compressive strength reduce the project cost.Keywords:lightweight aggregate concrete; frame stucture; story displacement; seismic performance作者简介:刘哲锋,博士,讲师,Email:lzf0072006@163.com。参考文献[1]徐有邻.混凝土结构理论发展及规范修订的建议[J].建筑结构学报.2007,28(1):1-6.[2]JGJ12—2006轻骨料混凝土结构技术规程[S].北京:中国建筑工业出版社,2006.[3]GB50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.[4]钟阳,江熙.强震软土区轻骨料混凝土框架结构的工程实践[J].建筑结构,2006,36(9):55-57,109.[5]郭继武. 建筑抗震设计[M]. 北京:中国建筑工业出版社,2002.[6]GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.[7]钟阳,江熙,丁建彤,等.结构粘土陶粒混凝土在某框架楼增层改造中的结构设计与应用[C]//第七届全国轻骨料及轻骨料混凝土学术讨论会论文集,南京,2004:472-477.