EFFECTIVE RIGIDITY OF REINFORCED CONCRETE ELEMENTS IN SEISMIC ANALYSIS AND DESIGN
EFFECTIVE RIGIDITY OF REINFORCED CONCRETE ELEMENTS IN SEISMIC ANALYSIS AND DESIGN
复制标题
抗震分析与设计中钢筋混凝土构件的有效刚度
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
M. Burgos
中科院分区：
文献类型：
--
作者：
J. Piqué;M. Burgos
Seismic analysis and design of reinforced concrete structures are performed based on linear response, however it is universally accepted that under severe earthquakes inelastic response and cracking is accepted. Therefore element properties should reflect this condition and inertias of beams and columns should be reduced accordingly. Several procedures are suggested to considered effective rigidity: Priestley (2003), ACI 318S-05, FEMA 356, Paulay and Priestley (1992). In this work the convenience to consider the effective stiffness of elements is demonstrated. However since there is not a uniform criteria, a comparison of these procedures was performed. Most world seismic standards do not establish effective stiffness for seismic analysis, although all of them accept inelastic incursions. Therefore it is useful to find a common or reasonable criterion to reduce inertias. Priestley (2003) procedure is applied to find the effective rigidity of elements, which are dependent on element strength. A direct consequence of reduced inertias is larger elastic displacements. On the other hand seismic standards specify displacements are computed by factoring elastic displacements from analysis, therefore using reduced inertias a substantial increase of estimated displacements would occur produced turning analysis into over conservative.
