[1]陈 坚,于 宙,王 丽,等.软基上水闸截面积和地基对预应力效果的影响规律[J].江苏水利,2021,(01):25-31.
 CHEN Jian,YU Zhou,WANG Li,et al.Influence law of cross-sectional area of sluice and foundation on prestressed effect on soft foundation[J].JIANGSU WATER RESOURCES,2021,(01):25-31.
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软基上水闸截面积和地基对预应力效果的影响规律()
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《江苏水利》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2021年01期
页码:
25-31
栏目:
水利工程建设
出版日期:
2021-02-03

文章信息/Info

Title:
Influence law of cross-sectional area of sluice and foundation on prestressed effect on soft foundation
文章编号:
1007-7839(2021)01-0025-07
作者:
陈 坚1 于 宙2 王 丽1 周 丹3 强 晟2
1.淮安市水利勘测设计研究院有限公司, 江苏 淮安 223005; 2.河海大学 水利水电学院, 江苏 南京 210098; 3.南京瑞迪建设科技有限公司, 江苏 南京 210029
Author(s):
CHEN Jian1 YU Zhou2 WANG Li1 ZHOU Dan3 QIANG Sheng2
1.Huaian Water Conservancy Survey and Design Research Institute Co., Ltd., Huaian 223005, China; 2.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China; 3.Nanjing Ruidi Construction Science and Technology Co., Ltd., Nanjing 210029, China
关键词:
预应力 混凝土防裂 有限元计算 软基 水闸
Keywords:
prestressed force anti-cracking of concrete finite element calculation soft foundation sluice
分类号:
TV66
文献标志码:
B
摘要:
水闸闸墩是一种薄壁混凝土结构,容易在施工期温度应力的作用下产生裂缝,预应力技术是一种降低闸墩内部拉应力的有效方法。为研究软基上水闸截面积对预应力作用效果的影响规律,运用有限单元法得到了预应力张拉荷载作用在不同截面积的水闸结构上时,在闸墩内部产生的拉应力降幅,并拟合出两者间的定量关系。通过基本力学原理,推导出了两者间的解析公式。在仿真计算值与解析值的对比分析中,发现地基对预应力效果有一定的消弱效果,因此针对具体消弱效果进行了研究。结果显示,地基会使预应力的作用效果降低10%,而水闸的截面积和常见软基的弹模对此消弱效果的影响不大。
Abstract:
Sluice pier is a kind of thin-wall concrete structure, which is easy to crack under the action of temperature stress during construction period. Prestressed technology is an effective method to reduce tensile stress in pier. In order to study the influence law of the cross-sectional area of sluice on prestressed effect on soft foundation, finite element method was used to obtain the decrease of tensile stress in the pier when the prestressed tension load acted on sluice structures with different cross-sectional areas, and the quantitative relationship was fitted. Through the basic mechanics principle, the analytic formula between the two was derived. In the comparison between simulated value and analytical value, it's founded that the foundation had a certain attenuation effect on the prestressed effect, so the specific attenuation effect was studied. The results showed that the foundation reduced the prestressed effect by 10%, but the cross-sectional area of sluice and the elastic modulus of common soft foundation had little influence on the attenuation effect.

参考文献/References:

[1] 王海波, 周君亮. 大型水闸闸墩施工期温度应力仿真和裂缝控制研究[J]. 土木工程学报, 2012, 45(7):169-174.
[2] 张子明, 郭兴文, 杜荣强. 水化热引起的大体积混凝土墙应力与开裂分析[J]. 河海大学学报(自然科学版), 2002(5):12-16.
[3] 陈守开, 张越培, 郭利霞, 等. 闸坝冲沙闸闸墩施工期温度与应力仿真研究[J]. 混凝土, 2012(6):10-12, 16.
[4] 朱岳明, 黎军, 刘勇军. 石梁河新建泄洪水闸闸墩裂缝成因分析[J]. 红水河, 2002(2):44-47, 61.
[5] 王碗琴, 王桂生, 强晟, 等. 大体积薄壁混凝土墩墙结构早龄期开裂过程的数值模拟[J]. 水电能源科学, 2018, 36(4):139-142.
[6] 吴健, 曹为民, 闪黎. 水工墩墙结构混凝土裂缝成因与防裂措施分析[J]. 中国水利, 2005(2):48-50.
[7] 刘俊柏, 林可冀. 预应力闸墩技术及其在我国水电工程中的应用[J]. 水力发电, 1991(5):20-24.
[8] 朱伯芳. 大体积混凝土温度应力与温度控制[M]. 北京:中国电力出版社, 1999.

相似文献/References:

[1]王丽,邓继,徐纯霞,等.大体积混凝土温控和预应力协同防裂措施[J].江苏水利,2022,(07):6.
 WANG Li,DENG Ji,XU Chunxia,et al.Synergistic anti-cracking measures of mass concrete by temperature control and prestress[J].JIANGSU WATER RESOURCES,2022,(01):6.

备注/Memo

备注/Memo:
收稿日期:2020-08-06
基金项目:江苏省水利科技项目(2019008); 国家自然科学基金面上项目(51679074)
作者简介:陈坚(1963—),男,高级工程师,本科,主要从事水工结构设计工作。E-mail:hsy.chenjian@163.com
更新日期/Last Update: 2021-01-20