基于贝叶斯方法的历史建筑砌体抗压强度推定.pdfVIP

第18卷第 5期 建 筑 材 料 学 报 Vo1．18。No．5 学兔兔 2015年 1O月 JOURNAL OF BUILDlNG MATER1ALS Oct．，2()1 5 文章编号：1O07—9629(2O15)O5一O778一O6 基于贝叶斯方法的历史建筑砌体抗压强度推定 彭 斌 ， 汪澜涯 ， 李 翔。， 付想平 (1．上海理工大学环境与建筑学院，上海200093；2．同济大学建筑工程系，上海200092) 摘要：基于贝叶斯方法获得历史建筑中砌体材料抗压强度的合理推定值．在实测样本有限且离散 的条件下，引入可靠的先验信息，并通过构造合理的似然函数，将间接法和直接法的实测样本信息 相结合，重构砖抗压强度、砂浆抗压强度以及砌体抗压强度推定误差的概率密度模型(PDF)．在推 定砌体抗压强度的同时，定量表示推定结果的不确定性．所提方法适用于现场实测信息量不足时 历史建筑砌体抗压强度的推定． 关键词：历史建筑；砌体；抗压强度；贝叶斯方法 中图分类号：TU522；TU501 文献标志码：A doi：10．3969／j．issn．1007-9629．2015．05．011 Inference for Compressive Strength of Masonry in Historical Buildings Based on Bayesian Method PENG Bin ， WANG Lanya ， LI Xiang。， FUXiangping (1．School of Environment and Architecture，University of Shanghai for Science and Technology，Shanghai 200093，China；2．Department of Building Engineering，Tongji University，Shanghai 200092，China) Abstract：Compressive strength of masonry in historical buildings was evaluated based on Bayesian meth— od．The limited information and divergent measured information were incorporated with reliable prior in～ formation．and information of direct measured strength samples and information of indirect measured strength samples were incorporated through an appropriate likelihood function．Probability density func tions(PDFs)for compressive strength of brick，compressive strength of mortar，and compressive strength evaluation error of masonry were established．Compressive strength of masonry was inferred and its uncer tainty was quantitatively evaluated based on the PDFs．The proposed method is suitable for compressive strength inferenc