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Guide for Modeling and Calculating Shrinkage and Creep in Hardened Concrete 硬化混凝土收缩和徐变建模和计算指南
发布日期: 2008-01-01
本指南旨在预测硬化混凝土的压缩收缩和徐变。可以假设预测适用于受拉和受剪的混凝土。它概述了硬化混凝土收缩和压缩徐变预测方程开发中存在的问题和局限性。本文还介绍并比较了四种不同数值方法的预测能力。提出的模型适用于至少湿养护1天并在养护后或之后加载的硬化混凝土。该模型适用于28天时平均圆柱抗压强度在至少20至70 MPa(3000至10000 psi)范围内的混凝土。本文件适用于希望在不进行测试的情况下预测混凝土收缩和徐变的设计师。对于对收缩和徐变敏感的结构,如果使用项目中使用的实际混凝土的测试数据对模型进行校准,可以提高单个模型预测的准确性,并扩大其适用范围。
This guide is intended for the prediction of shrinkage and creep in compression in hardened concrete. It may be assumed that predictions apply to concrete under tension and shear. It outlines the problems and limitations in developing prediction equations for shrinkage and compressive creep of hardened concrete. It also presents and compares the prediction capabilities of four different numerical methods. The models presented are valid for hardened concrete moist cured for at least 1 day and loaded after curing or later. The models are intended for concretes with mean compressive cylindrical strengths at 28 days within a range of at least 20 to 70 MPa (3000 to 10,000 psi). This document is addressed to designers who wish to predict shrinkage and creep in concrete without testing. For structures that are sensitive to shrinkage and creep, the accuracy of an individual model's predictions can be improved and their applicable range expanded if the model is calibrated with test data of the actual concrete to be used in the project.
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发布单位或类别: 美国-美国混凝土学会
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