台灣混凝土乾縮潛變資料庫之建立與CCL預測模式發展

ESTABLISHMENT OF THE CONCRETE SHRINKAGE AND CREEP DATABASE AND CCL PREDICTION MODELS IN TAIWAN

陸景文(Ching-Wen Lu) ； 陳振川(Jenn-Chuan Chern) ； 詹穎雯(Yin-Wen Chan)

《中國土木水利工程學刊》 31卷3期 (2019/05) Pp. 231-238

https://doi.org/10.6652/JoCICHE.201905_31(3).0002

摘要

本文在介紹台灣地區自1970年長期蒐集研究建立之混凝土乾縮與潛變試驗資料庫。並將試驗數據與國際常用預測模式進行比較，探討其準確性與適用性。研究中發現，國內之混凝土潛變、乾縮行為有明顯偏高的趨勢，主因便是國內混凝土較低的彈性模數與較高的漿量特性所致。因此，本文亦簡單介紹目前根據本資料庫，以統計之方式針對混凝土彈性模數對潛變、乾縮之影響提出修正因子，以美國西北大學發展之Model B3為基礎，配合其它主要參數調整預測模式，提出CCL預測模式，使其能對台灣地區的混凝土潛變、乾縮行為能提供合理的模擬與預測。

關鍵字

混凝土 ； 彈性模數 ； 潛變 ； 乾縮

並列摘要

A long term concrete shrinkage and creep experimental database established in Taiwan since 1970 is introduced in this paper. And the experimental data are compared to various prediction models to examine their accuracy and applicability. It has been noticed that the concrete creep and shrinkage behavior is apparently higher because of the concrete characteristics of lower modulus of elasticity and the higher paste volume content in Taiwan. Therefore, a modified factor for the influence of modulus of elasticity on concrete creep and shrinkage behavior is proposed by means of statistics based on this database. And the new CCL prediction model based on Bazants Model B3 is adjusted also with other main parameters for a reasonable simulation and prediction of concrete creep and shrinkage in Taiwan.

並列關鍵字

concrete ； modulus of elasticity ； creep ； shrinkage