考虑混凝土收缩徐变的超高层复杂结构施工全过程模拟

引用文献:

王忠良, 刘德辉, 郭智华, 杨亚增, 郑书仁. 考虑混凝土收缩徐变的超高层复杂结构施工全过程模拟[J]. 建筑结构,2023,48(11):137-142.

WANG Zhongliang LIU Dehui GUO Zhihua YANG Yazeng ZHENG Shuren. Simulation of construction whole process of super high-rise complex structure considering concrete shrinkage and creep[J]. Building Structure,2023,48(11):137-142.

作者:王忠良, 刘德辉, 郭智华, 杨亚增, 郑书仁
单位:中铁城建集团有限公司 中铁城建集团北京工程有限公司
摘要:为考虑施工过程中混凝土收缩徐变对超高层结构竖向变形的影响,以银川绿地中心双子塔之一的南塔为研究对象,采用有限元软件ANSYS建立南塔模型,考虑结构自重、施工荷载以及混凝土收缩徐变的作用,对南塔进行施工全过程模拟分析,利用生死单元技术模拟施工过程中荷载随结构高度的变化以及从下至上整个的施工过程,分别对外框筒、核心筒的竖向变形和竖向变形差进行了研究,并根据竖向变形进行了外框筒预调值及核心筒补偿值的计算。结果表明:外框筒、核心筒的竖向变形随高度的增加先增大后减小,二者竖向变形差满足施工要求;外框筒预调值及核心筒补偿值随结构高度变化呈现“两头小,中间大”的变化规律。研究成果可作为银川绿地中心双子塔安全施工控制方面的一项重要评估指标,对同类工程具有一定参考价值。
关键词:银川绿地中心;超高层结构;施工全过程分析;收缩徐变;生死单元;竖向变形;预调值;
作者简介:王忠良,学士,高级工程师,主要从事建筑结构研究、科技研发与工程技术管理工作,Email:2262325408@qq.com。
基金:
尊敬的用户,本篇文章需要2元,点击支付交费后阅读
参考文献[1] 黄宗襄,陈仲.超高层建筑设计与施工新进展[M].上海:同济大学出版社,2014.
[2] 傅学怡,邸博,吴兵,等.高层、超高层建筑结构设计调平法及其应用[J].建筑结构学报,2018,39(5):84-90.
[3] 阴光华,曹江,张德财,等.超高层施工过程模拟结果在不同软件中的比较分析[C]//《工业建筑》编委会,工业建筑杂志社有限公司.《工业建筑》2018年全国学术年会论文集(下册).北京:[出版者不详],2018:878-881.
[4] 王化杰,钱宏亮,范峰,等.京基金融中心施工全过程跟踪研究[J].哈尔滨工业大学学报,2015,47(6):15-20.
[5] YANG YEONG BIN,KUO SHYH RONG.Theory & analysis of nonlinear framed structures [M].New York:Prentice Hall,1994.
[6] 郑江,葛鸿鹏,王先铁,等.局部位形约束生死单元法及其在施工力学分析中的应用[J].建筑结构学报,2012,33(8):101-108.
[7] 陈晋,丁晗,邓岚青,等.考虑收缩徐变的施工分析对528m超高层塔楼巨柱类型选择的影响[J].建筑结构,2018,48(17):52-59.
[8] 张莉莉,马锦姝,巴盼锋,等.西安金融中心超高层施工竖向变形分析研究[J].建筑结构,2017,47(21):36-41.
[9] 张玉.超高层混凝土建筑收缩徐变效应分析[J].建筑结构,2017,47(S1):902-905.
[10] 混凝土结构设计规范:GB 50010—2010[S].北京:中国建筑工业出版社,2011.
[11] 李洋,胡海涛.超高层框架-核心筒体系施工过程对竖向变形差的影响分析[J].工程建设,2017,49(7):23-28.
[12] 曹志远.土木工程分析的施工力学与时变力学基础[J].土木工程学报,2001,34(3):41-46.
Simulation of construction whole process of super high-rise complex structure considering concrete shrinkage and creep
WANG Zhongliang LIU Dehui GUO Zhihua YANG Yazeng ZHENG Shuren
(China Railway Urban Construction Group Co., Ltd. China Railway Urban Construction Group Beijing Engineering Co., Ltd.)
Abstract: In order to consider the impact of concrete shrinkage and creep on the vertical deformation of super high-rise structures during construction, taking the south tower of the twin towers of Yinchuan Greenland Center as the research object, and the finite element software ANSYS was used to establish the south tower model. Considering the effect of structural self-weight, construction load and concrete shrinkage and creep, the construction whole process of the south tower was simulated and analyzed. The life-and-death unit technology was used to simulate the changes in load with structural height during the construction process and the entire construction process from bottom to top, the vertical deformation and vertical deformation difference of the outer frame cylinder and the core cylinder were studied, and the pre-adjustment value of the outer frame cylinder and the compensation value of the core cylinder were calculated based on the vertical deformation. The results show that the vertical deformation of the outer frame cylinder and the core cylinder first increases and then decreases with the increase of height, and the vertical deformation difference between the two meets the construction requirements. The pre-adjustment value of the outer frame cylinder and the compensation value of the core cylinder show a variation pattern of "small at both ends and large in the middle" with the change of structural height. The research results can serve as an important evaluation indicator for the safety construction control of the twin towers of Yinchuan Greenland Center, and have certain reference value for similar projects.
Keywords: Yinchuan Greenland Center; super high-rise structure; construction whole process analysis; shrinkage and creep; life-and-death unit; vertical deformation; pre-adjustment value
500 0 0
文字:     A-     A+     默认 取消