密拼连接叠合双向板挠度计算方法研究

引用文献:

陈东, 章雪峰 ,许四法, 傅林峰, 朱晓丹, 李慧铭. 密拼连接叠合双向板挠度计算方法研究[J]. 建筑结构,2023,48(11):68-74.

CHEN Dong ZHANG Xuefeng XU Sifa FU Linfeng ZHU Xiaodan LI Huiming. Analysis of calculation method for deflection on composite two-way slabs connected without gap[J]. Building Structure,2023,48(11):68-74.

作者:陈东, 章雪峰 ,许四法, 傅林峰, 朱晓丹, 李慧铭
单位:浙江工业大学土木工程学院 浙江工业大学工程设计集团有限公司 浙江浙工大检测技术有限公司
摘要:根据已完成的四边不出筋密拼连接叠合双向板原位加载试验研究成果,分析了钢筋桁架叠合双向板与现浇板抗弯刚度、挠度存在差异的机理。考虑弯矩调整、裂缝分布、支座附加筋及钢筋桁架等因素引入相关挠度折减系数对既有挠度计算方法进行修正。基于ACI318有效惯性矩方法、修正ASCE方法对叠合双向板挠度进行理论计算得出,ACI318有效惯性矩方法计算结果高估了叠合双向板弹性阶段刚度,修正ASCE方法适用于弹性阶段。解析刚度法结合修正挠度计算方法可用于计算叠合双向板挠度,适用于叠合双向板弹性和塑性阶段,计算值与实测值吻合较好。通过数值模拟开展参数分析得出,叠合双向板的抗弯刚度随现浇层与预制底板厚度比值的增大而提升明显,但钢筋桁架与支座附加筋等因素的刚度增强效应会减小。
关键词:密拼连接;叠合双向板;有效惯性矩法;解析刚度法;挠度;
作者简介:陈东,硕士,主要从事钢筋桁架叠合双向板领域研究,Email:634507576@qq.com。章雪峰,硕士,正高级工程师,一级注册结构工程师,主要从事装配式建筑领域研究,Email:zhangxue_feng@126.com。
基金:浙江省基础公益研究计划-桁架钢筋叠合双向板力学性能试验与多尺度精细化分析模型研究(LGF20E080019)。
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参考文献[1] 聂建国,姜越鑫,聂鑫,等.叠合双向板中钢筋桁架对预制板受力性能的影响[J].建筑结构学报,2021,42(1):151-158.
[2] 周旺华.现代混凝土叠合结构[M].北京:中国建筑工业出版社,1998.
[3] 叶献国,华和贵,徐天爽,等.叠合双向板拼接构造的试验研究[J].工业建筑,2010,40(1):59-63.
[4] 颜锋,高杰,田春雨,等.带接缝的混凝土叠合楼板足尺试验研究[J].建筑结构,2016,46(10):56-60.
[5] 装配式混凝土建筑技术标准:GB 51231—2016 [S].北京:中国建筑工业出版社,2017.
[6] 装配式混凝土结构技术规程:JGJ 1—2014[S].北京:中国建筑工业出版社,2014.
[7] 崔士起,刘传卿,刘文政,等.分离式接缝叠合双向板垂直接缝方向抗弯刚度的试验及计算方法研究[J].建筑结构学报,2018,39(9):75-84.
[8] 余泳涛,赵勇,高志强.单缝密拼钢筋混凝土叠合双向板受弯性能试验研究[J].建筑结构学报,2019,40(4):29-37.
[9] 恽燕春,陈鹏,王柏生,等.密拼叠合楼板受力性能研究[J].施工技术,2018,47(12):75-79,129.
[10] 章雪峰,郑曙光,单玉川,等.四边不出筋密拼连接叠合双向板原位加载对比试验研究[J].建筑结构,2019,49(23):113-117.
[11] 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.
[12] Building code requirements for structural concrete:ACI 318-19[S].Michigan:American Concrete Institute,2019.
[13] 聂建国,易卫华,雷丽英.闭口型压型钢板-混凝土组合板的刚度计算[J].工业建筑,2003,33(12):19-21.
[14] 聂建国,陈必磊,陈戈,等.钢筋混凝土叠合双向板的试验研究[J].工业建筑,2003,33(12):43-46.
[15] 王龙,金凌志,万冬伟.不同叠合方式超高性能混凝土叠合双向板受弯性能试验研究[J].建筑结构学报,2018,39(S2):43-51.
Analysis of calculation method for deflection on composite two-way slabs connected without gap
CHEN Dong ZHANG Xuefeng XU Sifa FU Linfeng ZHU Xiaodan LI Huiming
(College of Civil Engineering, Zhejiang University of Technology Zhejiang Design Group Co., Ltd., Zhejiang University of Technology Testing Technology Co., Ltd.of Zhejiang University of Technology)
Abstract: Based on the comparative experimental study on in-situ loading of the composite two-way slabs that have no extended reinforcement on all sides and connected without gap, the mechanism of differences in flexural rigidity and deflection between steel rebar reinforced truss composite two-way slabs and cast-in-place slabs was analyzed. Considering factors such as bending moment adjustment, crack distribution, additional steel rebar reinforcement of supports and steel trusses, the relevant deflection reduction coefficient was introduced to modify the existing deflection calculation method. Based on the ACI318 effective moment of inertia method and the modified ASCE method to theoretically calculate the deflection of the composite two-way plate, the calculation results of the ACI318 effective moment of inertia method overestimated the stiffness of the composite two-way plate in the elastic stage, and the modified ASCE method was suitable for the elastic stage. The analytical stiffness method combined with the corrected deflection calculation method could be used to calculate the deflection of the composite two-way slab, which was suitable for the elastic and plastic stages of the composite two-way slab, and the calculated value was in good agreement with the measured value. Through numerical simulation and parameter analysis, it is concluded that the flexural stiffness of the composite two-way slab increases significantly with the increase of the thickness ratio of the cast-in-place layer to the prefabricated floor, but the stiffness enhancement effect of the steel rebar truss and the additional steel rebar reinforcement of the support will decrease.
Keywords: connected without gap; composite two-way slab; effective moment of inertia method; analytical stiffness method; deflection
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