水泥钢纤维砂浆钢筋网加固矩形RC 偏压柱试验研究

对水泥钢纤维砂浆钢筋网加固矩形混凝土柱的偏压性能进行了研究,通过6根柱高为1 200mm带牛腿的加固柱与另2根同配置未加固混凝土柱的对比试验,研究了加固方式不同的纵、横向网筋间距,在偏心距为70mm和150mm的情况下,对构件极限荷载、抗裂性能的影响.试验主要观测了试验柱裂缝开展状态、网筋应变、混凝土及砂浆层应变,结果表明水泥钢纤维砂浆钢筋网薄层加固是一种加固效果显著,加固后工作性能优良的加固方法.

Experimental Study of RC Columns Strengthened with Steel Fiber Cement Mortar with Mesh Reinforcement under Eccentric Loading

This paper presented the results of experimental studies on reinforced concrete columns strengthened with steel fiber cement mortar with mesh reinforcement (SFMMR) under the combination of axial load and bending moment.A total of eight nearly full-size specimens with rectangular cross section were prepared and tested under eccentric compressive loading up to failure.The overall length of specimens with two haunched heads was 1 200 mm.Different wire mesh spacing and two eccentricities of 70 mm and 150 mm were investigated.The effects of these parameters of the ultimate load and cracking behavior of the columns as well as the variation of longitudinal strains on different faces of the columns were studied.The results demonstrated a significant enhancement of the performance of strengthened columns, compared with unstrengthened columns.