预应力型钢混凝土框架恢复力特性研究

姜小琴; JIANG Xiaoqin; 刘嘉琪; LIU Jiaqi; 王琨; WANG Kun

doi:10.48014/ems.20231207001

预应力型钢混凝土框架恢复力特性研究

Research on Restoring Force Model Characteristics of Prestressed Steel Reinforced Concrete Frames

工程材料与结构 2024年第3卷第1期页码[14-24] 下载全文[3.7MB]

摘要

在合理选用材料本构模型的基础上, 分别使用ABAQUS和OpenSEES有限元软件, 构建了单榀预应力型钢混凝土框架数值模型, 并进行了单调和滞回受力全过程数值分析, 分析了该类型框架结构的滞回特征。通过参数分析, 确定了影响此类框架滞回特性的主要参数, 并由此建立了恢复力模型。研究结果显示: 通过ABAQUS软件构建的数值模型可以直观反映框架的破坏形态和应力分布, 模拟峰值荷载为191kN, 与试验误差为10%; 通过OPENSEES有限元软件构建的数值模型能够从宏观反映框架的耗能能力, 模拟峰值荷载为186kN, 与试验误差为12%; 轴压比和长细比都是预应力型钢混凝土构件的敏感性参数, 试件的承载能力随着设计轴压比的增大而增大, 随着长细比的增大而降低, 但过小的长细比导致试件破坏较快, 不利于试件的延性; 预应力作用对滞回曲线的延性影响并不明显; 根据截面力学性能、构件几何参数, 通过线性回归手段构建的恢复力模型可以良好拟合该类型框架的滞回特性。

Abstract

On the basis of reasonable selection of material constitutive model, the numerical model of singlebay prestressed section steel-concrete frame. was constructed by using ABAQUS and Open SEES finite element software, respectively, and numerical analyses of the whole process of monotonic and hysteretic force were carried out, and the hysteretic characteristics of this type of frame. structure were analyzed. The main parameters affecting the hysteresis characteristics of this type of frame. were determined through parametric analysis, and the restoring force model was established as a result. The results show that: the numerical model constructed by ABAQUS software can intuitively reflect the damage morphology and stress distribution of the frame, and the simulated peak load is 191kN, with an error of 10% from the test; the numerical model constructed by OPENSEES finite element software can macroscopically reflect the energy-consuming capacity of the frame, and the simulated peak load is 186kN, with an error of 12% from the test; both the axial compression ratio and the length to slenderness ratio are sensitive parameters of prestressed steel and concrete members, the load capacity of the specimen increases with the increase of the design axial compression ratio, and decreases with the increase of the length and slenderness ratio, but too small length and slenderness ratio leads to the destruction of the specimen faster, which is not conducive to the ductility of the specimen; the prestressing effect on the ductility of the hysteresis curve is not obvious; according to the mechanical properties of the section, the geometrical parameters of the member, the restoring force constructed by means of linear regression can be a good fit for this type of frame.

DOI	10.48014/ems.20231207001
文章类型	研究性论文
收稿日期	2023-12-07
接收日期	2024-01-08
出版日期	2024-03-28
关键词	预应力, 型钢混凝土, 组合框架, 有限元分析, 恢复力模型
Keywords	Prestress, steel reinforce concrete, composite frame, finite element analysis, restoring force model
作者	姜小琴¹, 刘嘉琪^2,*, 王琨²
Author	JIANG Xiaoqin¹, LIU Jiaqi^2,*, WANG Kun²
所在单位	1. 扬州市市政设施管理中心, 扬州 225000 2. 扬州大学建筑科学与工程学院, 扬州 225000
Company	1. Yangzhou Municipal Government, Facility Management Center, Yangzhou 225000, China 2. Yangzhou University, College of Architectural Science and Engineering, Yangzhou 225000, China
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下载量	34
基金项目	本项研究得到了国家自然科学基金项目预制预应力桁架式钢骨砼框架承载性能研究(资助号51578478)的资助。
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引用本文	姜小琴, 刘嘉琪, 王琨. 预应力型钢混凝土框架恢复力特性研究[J]. 工程材料与结构, 2024, 3(1): 14-24.
Citation	JIANG Xiaoqin, LIU Jiaqi, WANG Kun. Research on restoring force model characteristics of prestressed steel reinforced concrete frames[J]. Engineering Materials and Structures 2024, 3(1): 14-24.