基于修正Park-Ang模型的PC框架结构损伤模型研究  

Study on seismic damage of prestressed concrete frame structures based on modified Park-Ang model

作　　者：王晓伟[1] 张耀庭[1] 肖云峰 WANG Xiaowei;ZHANG Yaoting;XIAO Yunfeng(School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074

出　　处：《地震工程与工程振动》2018年第3期73-80,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51278218)~~

摘　　要：为研究Park-Ang模型在预应力混凝土结构构件中的适用性,针对预应力混凝土构件,依据等效荷载法原理将构所受到的有效预压力作为轴向压力,并以此来计算预应力构件的轴压比;考虑有、无粘结预应力筋两种情况,基于预应力混凝土梁和普通钢筋混凝土梁的拟静力试验,利用1st Opt软件对Park-Ang模型参数β进行非线性拟合;最后,根据有、无粘结预应力混凝土框架结构的拟静力试验,利用本文修正的有、无粘结预应力混凝土构件的Park-Ang模型参数β计算其损伤,将计算结果与试验结果对比吻合良好,验证其适用性。In order to study the applicability of Park-Ang model in prestressed concrete structural members,according to the principle of equivalent load method,the effective pre-pressure of the prestressed member is taken as its axial pressure for the prestressed concrete members,and the axial compression ratio of the prestressed member is calculated. Considering the situation of bonded and unbonded prestressed,the parameter β of Park-Ang model are fitted by 1 st Opt software based on the quasi-static test of prestressed concrete beams and ordinary reinforced concrete beams. Finally,basing on the quasi-static test of bonded and unbonded prestressed concrete frame,the damage index is calculated by the modified Park-Ang model. The calculation results agree well with the experimental results and the validity of the model is verified.

关 键 词：Park-Ang模型 预应力混凝土构件 耗能因子 预应力混凝土框架结构 

分 类 号：TU378.4[建筑科学—结构工程]