混凝土浇筑期模板支架荷载动力效应试验研究  

Test Research on Load Dynamic Effect for Forms Support at Concrete Pouring Period

作　　者：谢楠[1] 李政[2] 郝鹏[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京城建二建设工程有限公司,北京100024

出　　处：《施工技术（下半月）》2011年第8期57-60,共4页Construction Technology

基　　金：国家自然科学基金资助项目(51078018);住房和城乡建设部安全质量监督专项经费项目(2009-9)

摘　　要：混凝土浇筑期是模板支架最为危险的时期,介绍了混凝土浇筑期内浇筑、振捣和泵送混凝土以及放置布料设备所产生的荷载动力效应。对两工地的模板支架进行动力测试,通过数据分析发现混凝土浇筑和振捣产生的动力效应不明显,浇筑和振捣产生的水平荷载很小,泵送混凝土时泵管对支架的冲击效应十分明显,放置布料设备产生的冲击效应较为明显。对于普通的混凝土水平构件,建议当采用泵送混凝土施工时可不考虑浇筑产生的荷载动力效应;当采用振捣棒振捣时可不考虑振捣产生的荷载动力效应;应充分考虑泵管对支架的冲击效应和放置布料设备产生的冲击效应。通过试验和理论分析给出了放置布料设备时荷载的动力系数。The stage of concrete pouring is the most dangerous for forms support.The dynamic effects of forms under construction operations such as pouring concrete,vibrating concrete and pumping concrete as well as putting large construction equipment on it are introduced.The dynamic tests are finished in two construction projects.For ordinary horizontal members,the analysis results show that the dynamic effects and horizontal force caused by the pouring concrete and vibrating concrete in terms of vibration bars are very little and can be omitted in the design.The impact effect of pumping pipeline on forms is significant,and it should be taken into account during the design.The dynamic effect of putting large construction equipment is very strong and the dynamic coefficient is given based on the test and theoretical analysis.

关 键 词：混凝土施工 振捣 模板支架 混凝土浇筑期 动力测试 泵送混凝土 

分 类 号：TU755.2[建筑科学—建筑技术科学]