摘要
基于对现有异形柱的研究成果与有关钢筋混凝土非线性力学及预应力结构基本理论,提出了适用于预应力混凝土异形柱框架的非线性有限元分析方法。针对该框架柱截面不规则等特点,运用分区层合截面法、主从系统中的偏心转化法,对框架作适当的单元划分。并通过运用子结构法及静力凝聚法减少计算量。混凝土与钢筋采用差量叠加式模型。预应力用等效荷载法处理。结合逐步加位移自修正法编制了对该结构进行单向及反复推覆分析的非线性计算程序,并验证了用该方法研究结构抗震性能的有效性。
Nonlinear finite analysis of prestressed concrete frame structure with special-section column is presented based on results of studies on special-section column and fundamental theory such as nonlinear mechanics of reinforcedconcrete and prestressed structure.Due to features of the frame such as irregular cross-section of the column, the frame is divided into elements properly.Zonal lamination section method and eccentricity transition matrix in master-slave system are applied.Substructure and static condensation are utilized to reduce computing time. The differential superposition method is used to combine concrete with bar. The prestressing force is solved by principle of equivalent load.The calculation program to nonlinearly analyze the structure with self-modifying step-iterative method under condition of incremental displacement is set up,which is used to study the aseismic performance of the frame with PUSH-OVER method under the unilateral and the reversed cyclic loading. The proposed method is verified.
出处
《科技通报》
2006年第6期796-801,共6页
Bulletin of Science and Technology
基金
浙江省建设厅基金项目
关键词
预应力混凝土
异形柱框架
非线性有限元分析
推覆分析
抗震性能
prestressed concrete
frame with special-section column
nonlinear finite analysis
PUSH-OVER
aseismic performance
