摘要
借助3D有限元软件,建立钢筋混凝土纯框架和带楼板框架两个空间结构数值模型,进行无阻尼自由振动分析得到各阶振型及周期值,由此探讨现浇板对框架结构动力特性的影响规律。带楼板框架结构基本周期模拟值与PKPM软件计算值十分接近,验证了计算模型的可靠性;纯框架和带楼板框架结构各阶振型、周期的对比表明,楼板导致结构低阶周期提高而高阶周期降低,对结构高阶振型的影响高于对低阶振型。基于分析结果,建议在实际工程结构设计中应充分考虑现浇板的作用。
Using the 3D FE modeling, natural vibration of a RC frame with cast-in-place slabs and a RC frame without floor slabs were analyzed to investigate the influence of the cast-in-place slab on the dynamic characteristics of the frame. The fundamental period determined from the numerical analysis of the RC frame with cast-in-place slabs was agree with that determined from design software PKPM, verifying the reliability of the calculation model. The comparison of vibration modes and periods between pure frame and the frame with slabs shows that the cast-in-place slabs enhance the lower-order periods and reduce the higher-order periods. The influence of the cast-in-place slabs on the higher-order modes is larger than that of on the lower-order modes. Based on the analysis result, the good function of the case-in-place slabs should be considered in the practical engineering structure design.
出处
《南昌航空大学学报（自然科学版）》
CAS
2014年第3期99-104,共6页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
航空科学基金(2012ZF56027)
教育部重点实验室基金(ZD201129007)
关键词
钢筋混凝土框架结构
现浇楼板
有限元分析
动力特性
reinforced concrete frame structure
cast-in-place slab
finite element analysis
dynamic characteristics
