Development of Probability Models For Concrete Formwork Live Loads

该研究考虑了结构安全中的一个重要问题。 施工过程中的故障代表了大量的 整体结构性故障。 施工现状处理 负载往往是自组织的。 这项研究将是必要的 合理选择施工荷载的第一步。 影响多层混凝土结构安全的因素很多 施工期间的结构。 这些因素包括 施工荷载及其在不同水平上的分布 地板和海岸。 以前的几项研究已经讨论了 各楼层间的荷载分配问题。 然而，在这方面， 确定施工活荷载的大小， 得到了足够的重视。 平板模板活荷载包括建筑材料储存 载荷、设备和工人的重量以及冲击载荷， 浇筑混凝土。 该研究将开发 预测模板活荷载的概率模型。 的 开发的模型将用于确定等效统一 各种模板构件设计的分布荷载。 这 研究的前提是保证模板 设计安全必须基于以下方面的风险度量： 概率 因此，本研究的目的是 基于概率的混凝土荷载准则的发展 模板。 研究结果将提供所需的 现浇混凝土可靠度评定的荷载模型 建筑施工实践。 这是重要的一步， 为施工确定可接受的风险水平 混凝土结构发展阶段及未来发展 基于概率的混凝土结构设计标准。

The research considers an important problem in structural safety. Failures during construction represent a significant number of total structural failures. Current treatment of construction loads tends to be ad-hoc. This research will be a necessary first step toward rationalizing selection of construction loads. A number of factors influence the safety of multistory concrete structures during construction. Among these factors are construction loads and their distribution on various levels of floors and shores. Several previous studies have addressed the problem of load distribution among various floors. However, determination of the magnitude of construction live loads has not received adequate attention. Slab formwork live loads include construction material storage loads, weight of equipment and workers, and impact loads when placing the concrete. The proposed research will develop probabilistic models for predicting formwork live loads. The developed models will be used to determine equivalent uniformly distributed loads for design of various formwork memebers. This study is based on the premise that the assurance of formwork design safety has to be based on a measure of risk in terms of probability. Accordingly, the objective of the study is development of probability based loading criteria for concrete formwork. The results of the proposed research will provide the required load model for evaluation of the reliability of current concrete building construction practices. This is an important step in extablishing an acceptable level of risk for the construction stage of concrete structures and future development of probability based design criteria for concrete construction.