Multistage seismic damage constitutive model and parameter calibration of reinforced concrete columns  

钢筋混凝土柱多级地震损伤本构模型及参数标定

作　　者：Xing Chenxi Shu Yiwei Zhu Xiaojie Zhong Jian 邢晨曦;疏一伟;朱小杰;钟剑(东南大学法学院,南京210096;合肥工业大学土木与水利工程学院,合肥230009;东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096)

机构地区：[1]School of Law,Southeast University,Nanjing 210096,China [2]School of Civil Engineering,Hefei University of Technology,Hefei 230009,China [3]Key Laboratory of Concrete and Pre-stressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,China

出　　处：《Journal of Southeast University(English Edition)》2024年第4期386-395,共10页东南大学学报（英文版）

基　　金：The National Natural Science Foundation of China(No.52208468,52178125);Fundamental Research Funds for Central Universities(No.2242023S20004).

摘　　要：The road traffic network contains a large number of bridges,and calculating bridge damage using refined models demands significant time and resources.Therefore,developing a rapid evaluation method for the seismic capacity of regular bridges has become a crucial scientific challenge.This study presents an approach in which the ductile column is represented by a single degree-of-freedom model with elastic-plastic constitutive characteristics.Utilizing an uncoupled multivariate power function model and a plastic hinge model,a multidimensional power function model for section hierarchical curvature is constructed.Subsequently,the seismic multistage damage constitutive model(SMSD-CM)of member hierarchy is deduced and calibrated through theoretical methods.This model efficiently derives the trilinear constitutive model of components by inputting several crucial parameters.The SMSD-CM accurately simulates the hysteretic curve and displacement time-history under actual seismic conditions and aligns well with pushover analysis results from tests.The efficiency,ease of operation,and accuracy make the model suitable for rapid evaluation of the seismic capacity of regular bridges within the road traffic network.道路交通网络中存在大量桥梁,而基于精细模型的桥梁损伤计算对时间和资金要求很高,因此研究常规桥梁抗震能力的快速评估方法已成为亟待解决的关键科学问题之一.将延性柱等效为具有弹塑性本构的单自由度模型.基于非耦合多变量幂函数模型(UCMV-PM)和塑性铰模型,建立了截面分级曲率的多维幂函数模型,然后通过理论方法推导和校准了构件分层的地震多阶段损伤本构模型(SMSD-CM).该模型通过输入几个关键参数,可以有效地获得构件的三折线本构模型.SMSD-CM不仅可以准确地模拟实际地震波下的滞回曲线和位移时程,而且与试验的推覆分析结果高度一致,证明该模型高效、准确且易于操作,可用于快速评估道路交通网络中常规桥梁的抗震能力.

关 键 词：moment-curvature analysis fragility analysis curvature ductility seismic multilevel damage trilinear model 

分 类 号：TU37[建筑科学—结构工程]