高性能輕質混凝土RC版構件之力學行為研究

A STUDY OF MECHANICAL BEHAVIOR OF HIGH PERFORMANCE REINFORCED LIGHTWEIGHT CONCRETE SLAB

10.6652/JoCICHE.202203_34(1).0004

干裕成(Yu-Cheng Kan)；裴廣智(K.-C. Pei)；林瑞陞(R.-S. Lin)

高性能 ； 輕質混凝土 ； 版 ； 音射 ； high performance ； lightweight concrete ； slab ； acoustic emission

中國土木水利工程學刊

34卷1期（2022 / 03 / 01）

31 - 40

繁體中文

本研究主旨在於檢視高性能輕質混凝土RC版承受集中載重下之行為模式，並與常重鋼筋混凝土版進行比較，並探討混凝土版構件在不同變數下之力學行為。本研究共檢驗12塊版構件，其參數包含有粒料種類、配筋方式、版厚等；欲探討輕質混凝土版之承載行為及性質。研究結果顯示，鋼筋混凝土版之極限承載力試驗值與降伏理論分析值接近。另外，發現輕質混凝土版厚度由100 mm增加至125 mm，可使其承載力之增加幅度，優於相同強度之普通混凝土版。在本研究載重試驗過程中，可透過音射法，監測並分析RC版載破壞之前的訊號特性，提供破壞前的預警效果。

This study attempt to investigate the behavior of reinforced high performance lightweight concrete slab under a concentrated load. The test results were also compared to those obtained from normal concrete slabs. Totally 12 slabs in various strengths, thicknesses and rebar arrangements were fabricated and tested. The ultimate load, ductility and failure pattern were examined. The test results showed that the ultimate load of the slabs turned out very close to those calculated based on yield-line theory. Increasing the thickness of HPLC slab from 100 mm to 125 mm seems to perform high load capacity than that of normal concrete with the same strength. Acoustic emission technique can provide an efficient means to monitor the characteristics of signals before the failure of RC slab.

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