【摘要】：為了探究RPC簡支梁受剪承載力的影響性能,通過對6根2組剪跨比為2.25和3.0的矩形梁進(jìn)行受剪性能試驗(yàn),分析2組不同剪跨比的試驗(yàn)梁,其配箍率對受剪承載力的影響;將試驗(yàn)結(jié)果與普通鋼筋混凝土修正壓力場公式,以及我國規(guī)范公式的計算結(jié)果進(jìn)行對比分析;考慮配箍率與鋼纖維的影響,修正RPC主拉應(yīng)力-應(yīng)變本構(gòu)關(guān)系,并編制程序進(jìn)行迭代計算,得出鋼纖維對承載力的貢獻(xiàn)率。研究發(fā)現(xiàn):配箍率和剪跨比對試驗(yàn)梁承載力的影響均比較明顯。配箍率≤0.252%時,配箍率越大,試驗(yàn)梁的受剪承載力越大,但隨著配箍率的繼續(xù)增大,試驗(yàn)梁呈彎剪破壞趨勢,配箍率-荷載曲線趨于平緩;鋼纖維對RPC梁抗剪承載力的影響不容忽視,而且對無腹筋梁的影響大于有腹筋梁;基于修正壓力場理論模型的改進(jìn)計算程序用于計算高強(qiáng)鋼筋RPC梁的抗剪承載力,其理論值與試驗(yàn)值吻合良好,具有一定的可信度和實(shí)用性。
[Abstract]:In order to investigate the shear bearing capacity of RPC simply supported beams, two groups of rectangular beams with 2. 25 and 3. 0 shear-span ratios were tested, and two groups of test beams with different shear-span ratios were analyzed. The effect of stirrups ratio on shear capacity; The test results are compared with the modified pressure field formula of ordinary reinforced concrete and the calculation results of the code formula in our country. Considering the influence of stirrups ratio and steel fiber, the principal tensile stress-strain constitutive relation of RPC is modified, and the iterative calculation program is compiled to obtain the contribution rate of steel fiber to the bearing capacity. It is found that the influence of stirrups ratio and shear-span ratio on the bearing capacity of the test beam is obvious. When the ratio of stirrups is 鈮，

本文編號：2468454