简谐荷载作用下拱型结构线性动力稳定性  

On linear dynamic stability of arch structure under harmonic load

作　　者：吴东平[1] 

机构地区：[1]武汉科技大学,湖北武汉430060

出　　处：《山西建筑》2012年第22期60-62,共3页Shanxi Architecture

摘　　要：通过分析发现拱型结构对动荷载的响应较为明显,以单拱为例,取1/3,1/5,1/7三种矢跨比的结构,在水平、竖向两种荷载作用下,分析了结构的线性谐响应结果,得出单拱自振频率分布均匀、密集、中间无"断层",带宽较宽,类似白噪声;同时共振区段分布多,发生共振强度大,不同矢跨比对简谐荷载的动力响应程度不同,其中1/5矢跨比响应程度最大。The study points out the response of the arch structure for the dynamic loading is obvious by analyzing,indicates the linear harmonic response results of the structure under the horizontal and vertical loading effects by taking the single arch as the example and selecting 1/3,1/5 and 1/7 rise-span ratio structures,and concludes the single arch has even and dense natural frequency distribution without faults in the middle and has wide bandwidth similar to white noise,and illustrates it many distributions of the resonance section,large resonance strength,various rise-span ratio has different dynamic response of the harmonic loading,besides 1/5 rise-span ratio has the largest response.

关 键 词：拱型结构 动力稳定 谐振动 

分 类 号：TU311.3[建筑科学—结构工程]