新老混凝土缝面应力仿真及早龄期原型试验验证

doi:10.16232/j.cnki.1001-4179.2019.09.032

摘要/Abstract

摘要： 关于新老混凝土缝面应力的研究成果主要集中在实验室，缺乏对实际工程新老混凝土缝面早龄期力学发展规律的原型试验研究，且现有仿真计算程序虽然考虑了新老混凝土缝面的早龄期应力发展情况，但不能确定所计算得到应力的合理性。以浙江省澥浦泵站为例，设计了该工程新老混凝土缝面早龄期原型试验,获取了该工程新老混凝土缝面应变和温度历时曲线，利用已有的弹模公式计算得到缝面应力历时曲线。同时，根据实际浇筑计划，对混凝土泵站的施工期温度场和应力场进行了仿真计算，再利用原型试验数据验证仿真计算结果的正确性。计算结果表明：原型试验获取的温度和应力历时曲线与仿真计算结果比较吻合，证明现有仿真计算程序对大体积混凝土的新老混凝土缝面计算较为准确，计算得到的应力值比较符合实际现象。

关键词: 应力应变, 新老混凝土, 缝面, 原型试验, 早龄期, 仿真计算

Abstract: The researches on stress of new and old concrete joints were mainly from laboratory tests. And there was no prototype experimental study on the development law of early hardening age mechanics of new and old concrete joints in practical engineering. Although the existing simulation calculation program takes into account the development of early age hardening stress of new and old concrete joints, the rationality of the calculated stress can not be determined. In this paper, the prototype test of early age of new and old concrete joints in practical engineering is designed, and the strain and temperature diachronic curves of new and old concrete joints in this project are obtained, and the stress history curves of new and old concrete joints are calculated by using the existing elastic mold formulas. At the same time, according to the actual pouring plan, the temperature field and stress field of the concrete pumping station during the construction period are simulated and calculated, and then the correctness of the simulation results is verified by the prototype test data. The calculation results show that the temperature and stress history curves obtained from the prototype test are in good agreement with the simulation results, which proves that the existing simulation calculation program is accurate for the calculation of new and old concrete joints of mass concrete.

Key words: stress and strain, new and old concrete, joint face, prototype test；early hardening age, simulation analysis

章景涛，郑学瑞，裘华锋，张南南，强晟. 新老混凝土缝面应力仿真及早龄期原型试验验证[J]. 人民长江, doi: 10.16232/j.cnki.1001-4179.2019.09.032.

ZHANG Jingtao, ZHENG Xuerui, QIU Huafeng，ZHANG Nannan, QIANG Sheng. Stress simulation of new and old concrete joint face and prototype verification experiment at early hardening age[J]. , doi: 10.16232/j.cnki.1001-4179.2019.09.032.

[1]	张泽玉;王金山;李念平;. 调水系统突发断电情况下应急处置方案研究[J]. 人民长江, 2022, 53(7): 213-220.
[2]	杨斌;周雨微;王蒂. “山”形自闭式水封水密特性仿真计算与试验研究[J]. 人民长江, 2022, 53(3): 160-164.
[3]	钟跃辉,武亮,刘春风,李凯,高小峰. 低热水泥混凝土早龄期强度试验与成熟度分析[J]. 人民长江, 2021, 52(9): 186-192.
[4]	朱学贤, 倪锦初, 张治军 ,帖熠 ,凌旋. 滇中引水工程香炉山深埋隧洞施工长距离通风研究[J]. 人民长江, 2021, 52(2): 147-152.
[5]	杨哲，饶锡保，谭凡，徐晗，何晓民. 不同期龄塑性混凝土力学性能试验研究[J]. 人民长江, 2020, 51(增刊I): 184-187.
[6]	李端有，叶斌，李波. 高拱坝水垫塘运行期监测成果分析——以溪洛渡水电站为例[J]. 人民长江, 2020, 51(S2): 329-333.
[7]	胡文乐,何朋立,刘华,谷宏全,胡鹏飞,王梦南,冯旭晨. 玄武岩纤维加筋黄土力学参数优化试验研究[J]. 人民长江, 2020, 51(5): 222-227.
[8]	付明伟，杨斌，刘礼华. 拍式浮体闸门充压水封仿真计算研究[J]. 人民长江, 2018, 49(15): 80-84.
[9]	吴瑕方涛. 南水北调中线膨胀土渠道安全监测成果分析[J]. J4, 2015, 46(3): 5-8.
[10]	滕飞 金海军 张怀仁田清伟. 向家坝升船机筒体结构变形监测及仿真计算研究[J]. J4, 2015, 46(2): 104-106.
[11]	姜景山程展林卢文平. 粗粒土CT三轴湿化变形试验研究[J]. J4, 2014, 45(7): 94-97.
[12]	方国宝宋志忠王程路万锋. 荆江大堤防洪闸闸室底板预留宽缝研究[J]. J4, 2014, 45(19): 25-28.
[13]	孙长帅秦秀娟 滕继东. 特殊应力路径下软黏土变形与强度特性试验研究[J]. J4, 2013, 44(4): 48-51.
[14]	张家柱. 膨胀土地基膨胀变形量计算中修正系数的研究[J]. J4, 2013, 44(20): 10-12.
[15]	冯光伟贾少燕赵廷华水淼张玉明. 大型薄壁预应力U形槽原型充水试验分析[J]. J4, 2013, 44(16): 36-38.

新老混凝土缝面应力仿真及早龄期原型试验验证

Stress simulation of new and old concrete joint face and prototype verification experiment at early hardening age

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价