预应力混凝土双T板弯曲试验有限元分析

葛益芃; 熊学玉

doi:10.13204/j.gyjzg21061511

预应力混凝土双T板弯曲试验有限元分析

doi: 10.13204/j.gyjzg21061511

葛益芃,
熊学玉^,

同济大学预应力研究所, 上海 200092

基金项目:

国家自然科学基金项目（52078364）

详细信息

作者简介:
葛益芃,女,1996年出生,硕士研究生

通讯作者:
熊学玉,xueyu@tongji.edu.cn。

计量
- 文章访问数: 177
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- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2021-06-15
- 网络出版日期: 2022-02-21

FINITE ELEMENT ANALYSIS OF BENDING TEST FOR PRESTRESSED CONCRETE DOUBLE TEES

GE Yipeng,
XIONG Xueyu^,

Institute of Prestressed Structures, Tongji University, Shanghai 200092, China

摘要

摘要: 为了满足预应力混凝土双T板在大跨、重载结构中的使用需求，弥补国内针对该类试件足尺试验和有限元模拟方面的缺失，对4块先张法制成的足尺试件进行弯曲试验，试件跨度分别为12，13.2 m，并采用ABAQUS有限元分析软件结合实测材料特性建模，模拟试验的全过程，并基于较好的模拟结果研究混凝土强度、预应力筋用量、板面普通钢筋用量、板肋普通钢筋用量和有效预应力大小等对抗弯性能的影响。试验和有限元分析结果表明：按我国现行JGJ 369—2016《预应力混凝土结构设计规范》中双T板有较大的安全度，试件实际的承载力高于设计承载力的1.5倍，采用实测材料特性的计算值平均低于试验值9.8%；通过ABAQUS模拟的极限承载力偏差在5%以内，钢筋应力的全过程变化较一致；受弯状态下有效预应力对开裂荷载影响最大，预应力筋面积对抗弯承载力影响最大，配置的双层钢筋网片将抗弯承载力提高11.3%。
- 预应力混凝土 /
- 双T板 /
- 有限元
Abstract: In order to meet the application requirements of prestressed concrete double tees in long-span and heavy-load structures and make up for the lack of full-scale test and finite element simulation of this kind of specimens in China, four full-scale pretensioning specimens were subjected to bending load, with the spans of 12 m and 13.2 m. The whole process of the test was simulated by ABAQUS finite element analysis software, combined with the measured material characteristics. Based on the good simulation results, it was studied that the effects of concrete strength, the amount prestressed reinforcement, the amount of reinforcement in slabs and ribs, and effective prestress on the flexural properties. The results of test and finite element analysis showed that the double tees designed according to Code for Design of Prestressed Concrete Structures(JGJ 369-2016) had great safety, the actual bearing capacity of the specimen was 1.5 times higher than the design bearing capacity, and the calculated values using the measured material properties was 9.8% lower than the test values on average; the deviation of ultimate bearing capacity simulated by ABAQUS was less than 5%, and the change of reinforcement stress was consistent in the whole process; in the bending state, the effective prestress had the greatest impact on the cracking load, and the amount of prestressed reinforcement had the greatest impact on the flexural capacity. The double-layer reinforcement mesh would improve the flexural capacity by 11.3%.
- prestressed concrete /
- double tees /
- finite element analysis

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参考文献(23)

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