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一种新型装配式混凝土剪力墙等效平面桁架模型

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针对一种具有一定地震响应自适应能力的新型装配式剪力墙的墙体,提出一种等效平面桁架模型非线性分析方法,有效解决传统的建模方法效率低下、提取的结构刚度和质量矩阵的阶数过大,影响后续结构振动控制系统调用的问题.对两种由不同水平连接装置连接而成的新型装配式剪力墙进行加载试验;通过刚度等效将矩形平面微元体简化为等效平面桁架单元,通过强调等效原则对混凝土应力-应变关系进行修正;结合装配式剪力墙等效平面桁架模型的特点,提出一种适用于该模型的破坏准则和一种裂缝处理方法.将新型装配式剪力墙等效平面桁架模型的模拟结果和试验结果进行误差分析,结果表明,所建等效平面桁架模型能够快速提取结构刚度、质量矩阵;单向推覆所得结果与试验特征荷载平均相对误差为 4.0%,与ANSYS和ABAQUS传统有限元模拟结果特征荷载平均相对误差分别为 2.3%和 2.7%,但计算时间分别降低了 60%和 64%.所建立的新型装配式剪力墙结构等效平面桁架模型能够适用于后续结构振动控制中,且精度较高.
An equivalent plane truss model for new fabricated concrete shear wall
An equivalent planar truss model nonlinear analysis method was proposed for a new fabricated shear wall with certain seismic response adaptive capability.This method effectively solved the problems of low efficiency of traditional modeling methods and excessive order of extracted structural stiffness and mass matrices,which could affect the subsequent call of the structural vibration control system.Loading tests were carried out on two new fabricated shear walls connected by different horizontal connecting devices.The rectangular plane microelement was simplified into an equivalent plane truss element based on the equivalent stiffness principle,and the concrete stress-strain relationship was modified according to the principle of equivalent strength.Combining with the characteristics of the equivalent plane truss model of the fabricated shear wall,a failure criterion and a crack treatment method suitable for the model were proposed.Error analysis was carried out on the simulation results and test results of the equivalent plane truss model of the new fabricated shear wall.The results showed that the established equivalent plane truss model could quickly extract the structural stiffness and mass matrices.The average relative error between the results obtained from unidirectional overturning and the characteristic load value of the test was 4.0%,while the average relative errors between the results obtained by ANSYS and ABAQUS traditional finite element simulations and the characteristic load were 2.3%and 2.7%,respectively.However,the calculation time was reduced by 60%and 64%,respectively.The proposed model of the fabricated shear wall could be applied to subsequent structural vibration control with high accuracy.

new fabricated shear wallequivalent plane truss modelconstitutive modelfinite element simulationnonlinear analysis

樊禹江、丁佳雄、黄欢欢、廖凯、许锦宝

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长安大学建筑学院,陕西 西安 710061

长安大学建筑工程学院,陕西 西安 710061

新型装配式剪力墙 等效平面桁架模型 本构模型 有限元模拟 非线性分析

国家自然科学基金青年基金陕西省重点研发计划陕西省重点研发计划陕西省自然科学基金

518080462023-YBSF-3152021SF-5212023-JC-YB-470

2024

10.6040/j.issn.1672-3961.0.2023.054

山东大学学报(工学版)
山东大学

山东大学学报(工学版)

CSTPCD北大核心
影响因子：0.634
ISSN：1672-3961
年,卷(期)：2024.54(3)