混凝土浇筑前可变材料荷载的特征值研究

作者：王宾¹,秦非非²,贾松松³,谢楠⁴

作者单位：

王宾,高级工程师,E-mail: 2701163609@ qq. com

作者简介：

1. 中铁置业集团有限公司,北京 100055; 2. 山东电力工程咨询有限公司,山东济南 250013;3. 唐钢国际工程技术有限公司,河北唐山 063300; 4. 北京交通大学土建学院,北京 100044

基金项目：

∗国家自然科学基金(51578050)

摘要：

混凝土浇筑前的可变材料荷载指堆积在模板面上施工材料的自重,荷载分布极不均匀,当前的概率模型无法准确描述. 依据前期项目荷载调查结果,分析可变材料荷载特点,确定最不利荷载的采样时段;基于模板支架立杆轴力的影响面,提出一种新的非平稳二项随机场,用以描述可变材料荷载;依据 20 个项目荷载调研结果,按照不同的施工条件类别,给出随机场的统计参数,基于统计结果给出了可变材料荷载标准值的取值建议.

关键词：混凝土;荷载;随机场;特征值

English：

Variable material load (VML) before concrete pouring is the load from construction materialsstacked on formworks. Because of extremely uneven load distribution, current probabilistic models cannotdescribe this kind of load accurately. Based on the results of previous project load survey, thecharacteristics of VML were analyzed and sampling period for the most unfavorable load was determined.According to the influence surface for axial force of formwork support system, a new non-stationarybinomial random field was proposed to describe VML. According to the load survey results of 20 projects,the statistical parameters of the random field are given according to different construction conditions.Based on the above results, the standard values of VML are provided.

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混凝土 > 2024年 第53卷 第10期