周期折减系数法在结构设计中的局限性  

Limitations of the Periodic Reduction Coefficient Method in Structural Design

作　　者：曹军岭 邢鹏 CAO Jun-ling;XING Peng(Shanxi Industrial Equipment Installation Group Co.Ltd.,Taiyuan 030032,China)

机构地区：[1]山西省工业设备安装集团有限公司,太原030032

出　　处：《工程建设与设计》2025年第1期22-24,共3页Construction & Design for Engineering

摘　　要：为了研究周期折减系数对结构地震位移的影响,建立4个计算模型进行分析,并对比计算结果。结构计算忽略填充墙刚度时,会同时导致地震内力的低估和地震位移的高估。周期折减系数法计算地震效应时仅提高了地震作用力并未提高结构计算刚度,所以低估的内力可采用周期折减系数法进行调整,而高估的位移不仅无法用该法正确调整,反而会再次放大。对于高估的位移,即使不做调整也偏于安全。对于低阶振型周期为T_(g)~5T_(g)(T_(g)为特征周期)的填充墙较均匀的结构,周期折减系数取0.7进行抗震分析,地震位移计算结果会达到实际值的2.04倍。In order to study the influence of periodic reduction coefficient on structural seismic displacement,four calculation models were established and the calculation results were compared.Structural calculation ignoring filling wall stiffness leads to both underestimation of seismic internal force and overestimation of seismic displacement.When calculating the seismic effect by the periodic reduction coefficient method,the seismic force does not improve the stiffness of the structure calculation,so the underestimated internal force can be adjusted by the periodic reduction coefficient method,while the overestimated displacement can not be adjusted correctly by this method,but will be amplified again.For overestimated displacement,safety even if no adjustment is biased.For the structure of the filling wall between T_(g) and 5 T_(g),T_(g) is the characteristic period,the period reduction coefficient is 0.7 for seismic analysis,and the seismic displacement calculation result will reach 2.04 times of the actual value.

关 键 词：填充墙刚度 地震位移 周期折减系数 

分 类 号：TU352.11[建筑科学—结构工程]