中央歌剧院SRC梁浇筑过程中高大模板支架承担荷载比例研究
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摘要
以中央歌剧院剧场工程为背景,以浇筑期北侧屋面SRC梁及其高达33. 43m的支撑体系为对象,从试验测试和理论分析2个方面对承担荷载比例进行研究。对屋面SRC梁中型钢的应变和模板支架中立杆的应变与变形进行测试,发现型钢参与受力,中部立杆承担的混凝土荷载不足按承载面积法计算值的40%;在理论分析方面,提出初凝状态屋面SRC梁及其支撑体系的有限元建模方法,将有限元结果与实测值进行对比,通过仿真计算获得型钢和模板支架各自分担混凝土荷载的比例,同时还发现搭设高度对模板支架承担混凝土荷载的比例有显著影响,随着搭设高度的增加,模板支架承担荷载的比例将会降低。
Taking Central Opera Theatre project as the background,the SRC beam during concrete placement and its supporting falsework up to 33. 43 m are taken as the objects,and the load bearing ratio is studied from both experimental test and theoretical analysis. The strain of the shaped steel in the SRC roof beam,the strain and deformation of the falsework are tested. It is found that the steel is stressed,and the concrete load carried by the middle shore is less than 40% of the calculated value of the bearing area method. In the aspect of theoretical analysis,a finite element modeling method of initially condensed SRC roof beam is proposed. The proportion of concrete load between shaped steel and falsework shore is obtained by simulation calculation,and compared with the measured value. At the same time,it is also found that the height of the falsework has a significant influence on the load bearing ratio. As the height of the falsework increases,the load bearing ratio will decrease.
Taking Central Opera Theatre project as the background,the SRC beam during concrete placement and its supporting falsework up to 33. 43 m are taken as the objects,and the load bearing ratio is studied from both experimental test and theoretical analysis. The strain of the shaped steel in the SRC roof beam,the strain and deformation of the falsework are tested. It is found that the steel is stressed,and the concrete load carried by the middle shore is less than 40% of the calculated value of the bearing area method. In the aspect of theoretical analysis,a finite element modeling method of initially condensed SRC roof beam is proposed. The proportion of concrete load between shaped steel and falsework shore is obtained by simulation calculation,and compared with the measured value. At the same time,it is also found that the height of the falsework has a significant influence on the load bearing ratio. As the height of the falsework increases,the load bearing ratio will decrease.
引文
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[2]中华人民共和国住房和城乡建设部安全生产管理委员会.2013年各月房屋市政工程生产安全事故情况通报[R].北京,2013.
[3]宗兆民,王福龙,李小霞.中央歌剧院工程高大模板支架的施工监测[J].山西建筑,2018,44(3):95-97.
[4]王安君,张同波,于德湖.大截面型钢混凝土梁及其模板支架体系协同受力分析[J].青岛理工大学学报,2012,33(5):111-116.
[5]王安君.大截面型钢混凝土梁及其模板支架体系协同受力分析及相关工艺研究[D].青岛:青岛理工大学,2012.
[6]秦健.型钢混凝土转换梁及其支撑体系协同受力试验研究[D].青岛:青岛理工大学,2014.
[7]孔月.型钢混凝土转换梁施工支撑体系研究[D].青岛:青岛理工大学,2014.
[8]李如男.型钢混凝土梁式转换层施工过程力学分析[J].低温建筑技术,2014,36(5):80-82.
[9]常江锋.转换层高支模体系有限元施工模拟分析[D].长沙:湖南大学,2012.
[10]肖军.型钢混凝土梁构件施工阶段的受力性能及其施工工艺[D].西安:西安建筑科技大学,2006.
[11]谢楠,付小辉,王立峰,等.扣件式高大模板支架的概率极限状态设计法研究[J].工程力学,2016,33(10):68-75,104.
[12]中央歌剧院剧场工程模板工程搭设方案[Z]. 2017.
[13]中国建筑科学研究院.混凝土结构工程施工规范:GB50666—2011[S].北京:中国建筑工业出版社,2012.
[14] XIE Nan,OUYANG Jie,LI Bing,et al. Experimental research on mechanical properties of the early-age shotcrete[C]//2011International Conference on Civil Engineering and Transportation,2011.
[15]中国建筑科学研究院.混凝土泵送施工技术规程:JGJ/T10—2011[S].北京:中国建筑工业出版社,2011.
[16]王新敏. ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.