通过室内试验研究了玻璃纤维掺量对轻骨料混凝土抗压强度、劈裂抗拉强度、抗折强度等力学性能，以及玻璃纤维掺量和应力比对轻骨料混凝土疲劳寿命的影响。试验结果表明：玻璃纤维的加入在一定程度上虽然降低了轻骨料混凝土的抗压强度，但使抗折强度和折压比显著增大，明显改善了轻骨料混凝土的弯曲韧性；轻骨料混凝土的劈裂抗拉强度随玻璃纤维掺量的增大呈现先增大后减小规律，当玻璃掺量为1.5时，劈裂抗拉强度达到最大值。同一应力比下，玻璃纤维掺量越大轻骨料混凝土的疲劳寿命越长；当玻璃纤维掺量相同时，应力比越大，轻骨料混凝土的疲劳寿命越短；随着玻璃纤维掺量的增多，疲劳方程的斜率和截距都逐渐增大，表明疲劳寿命对应力比的敏感性逐渐增大。%The effects of glass fiber content on the compressive strength, splitting tensile strength, lexural strength and other mechanical properties of lightweight aggregate concrete, and the effects of glass fiber content and stress ratio on the fatigue life of lightweight aggregate concrete are study based on the indoor test. The test results show that adding glass fibers reduces the compressive strength of lightweight aggregate concrete in a certain extent, but the flexural strength and fracture pressure ratio increase significantly, and the flexural toughness of the lightweight aggregate concrete is improved significantly. With the increasing of glass fiber content,the splitting tensile strength of lightweight aggregate concrete in-creases at first and then decreases, while the glass content is 1.5, and the splitting tensile strength can reach the maximum value. When the stress ratio is same,the larger glass fiber content, the longer fatigue life of lightweight aggregate concrete, but when the glass fiber content is the same, the larger stress ratio, the smaller fatigue life of lightweight aggregate con-crete. With the increasing glass fiber content,the slope and intercept of fatigue equation all gradually increases,which in-dicates sensitivity to fatigue stress ratio increases gradually.
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