3-D Inelastic Response of R/C Structures

本项目由1991年度科研启动奖项目资助。本研究的目的是对钢筋混凝土（R/C）结构的非比例变形对R/C构件的非弹性响应的不利影响进行三维研究。有限元模型包括非弹性实体单元组合来模拟混凝土和弹塑性杆单元代表钢筋，将用于研究轴向和侧向变形之间的复杂相互作用。​以1979年10月15日帝王谷地震为例，评价了ICS大厦在地震中的反应。还将在单元水平上进行进一步的参数化研究，以提高知识水平，并满足对R/C柱在轴向和横向荷载非耦合波动下的力-位移响应的详细信息的需要。本项目的研究结果有望提高对R/C结构和构件的循环性能的理解，并影响R/C结构的抗震设计实践。

This project is supported under the Research Initiation Awards (RIA) Program, FY 91. The objective of this research is to perform a 3- D study of reinforced concrete (R/C) structures on the adverse effects of nonproportional deformations on the inelastic response of R/C members. A finite element model which includes an assemblage of inelastic solid elements to model the concrete and elastic-plastic bar elements representing the reinforcing steel will be used to study the complex interaction between the axial and lateral deformations. As a case study, the response of ICS Building during the Imperial Valley Earthquake of Oct. 15, 1979 will be evaluated. Further parametric study at the elements level will be also performed to advance the knowledge and to satisfy the need for detailed information on the force-displacement response of R/C columns under uncoupled fluctuation of axial and lateral loads. The results of this project are expected to improve the understanding of the cyclic behavior of R/C structures and members, and to impact the seismic design practices of R/C structures.