预应力装配式混凝土框架-屈曲约束,支撑体系参数分析

卿缘; 巩兆辉; 王春林; 曾滨

doi:10.3724/j.gyjzG24091802

预应力装配式混凝土框架-屈曲约束,支撑体系参数分析

doi: 10.3724/j.gyjzG24091802

卿缘¹,
巩兆辉¹,
王春林^1, ,,
曾滨²

1. 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;
2. 中冶建筑研究总院有限公司, 北京 100088

基金项目:

国家重点研发计划项目(2022YFC3801800)。

详细信息

作者简介:
卿缘,博士,主要从事结构工程方向的研究。

通讯作者:
王春林,博士,教授,主要从事结构工程方向的研究,chunlin@seu.edu.cn。

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- 文章访问数: 19
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- 被引次数: 0
出版历程
- 收稿日期: 2024-09-18
- 网络出版日期: 2024-11-06

Parametric Analysis of Prestressed Precast Concrete Frames with Buckling-Restrained Braces

1. Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China;
2. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China

摘要

摘要: 为了促进装配式混凝土框架在强震区的应用,针对一种新型预应力装配式混凝土框架-屈曲约束支撑体系(BRB-PPCF),进行了20条地震波作用下6、9和12层BRB-PPCF算例的动力时程分析。结果表明:在罕遇地震烈度和极罕遇地震烈度下,BRB-PPCFs的最大层间位移角(θ_max)平均值均远小于2.0%,最大残余层间位移角(θ_r)均小于0.5%。随BRB-PPCF中抗弯子框架(MSF)与抗侧子桁架(TSS)的层间初始刚度比α_c的减少,BRB-PPCFs的θ_max和θ_r均逐渐减少,可有效提升其抗震能力和震后可恢复性能。在线性极限状态下MSF的层间剪力与在屈服时TSS的层间剪力的比值ψ增加,BRB-PPCFs的θ_max和θ_r均表现出先减少后增加,但影响相对较小。预应力筋的初张应力与其比例极限强度的比值σ_pi/σ_pl对BRB-PPCF的θ_max和θ_r的影响可以忽略。
- 装配式混凝土 /
- 屈曲约束支撑 /
- 后张预应力 /
- 抗震性能 /
- 参数分析
Abstract: To promote the application of precast concrete frames in earthquake hazard areas, a new prestressed precast concrete frame with buckling-restrained braces (BRB-PPCF) was proposed, and the nonlinear dynamic time-history analysis of 6-story, 9-story and 12-story BRB-PPCF cases under 20 earthquake waves were carried out. The results showed that the average maximum inter-story drift ratios θ_max of BRB-PPCFs were less than 2.0% and the maximum residual inter-story drift ratios θ_r were less than 0.5% under both rare and extremely rare seismic intensity. The θ_max and θ_r values of BRB-PPCFs gradually decreased with the decrease of the initial stiffness ratio α_c between the moment-resistant sub-frame (MSF) and the truss sub-system (TSS). Reducing the α_c value of BRB-PPCF effectively improved its seismic performance and post-earthquake recoverability. The θ_max and θ_r values of BRB-PPCFs decreased first and then increased with the increase of the ratio ψ of the MSF inter-story shear force at linear limit state and the TSS shear force at yield state, and the influence of the ψ was relatively small. The effects of the ratio σ_pi/σ_plbetween the initial tensile stress and the proportional ultimate strength on the θ_max and θ_r values of the BRB-PPCF could be ignored.
- precast concrete /
- buckling-restrained brace /
- post-tensioned prestressing /
- seismic performance /
- parameter analysis

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参考文献(12)

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