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玄武岩纤维(BFRP)拉结件是连接混凝土夹芯墙板外墙板中内、外叶墙板的重要构件,在保温外墙板中主要承受拉拔荷载以及剪切荷载。为了研究BFRP拉结件的锚固和抗剪性能,对5组不同温度下的18个中心拔出试件和6个双剪试件分别进行拉拔试验和双剪试验。结果表明:中心拔出试件破坏形态为锥体-黏结复合破坏;常温25℃下,BFRP筋抗拉拔承载力为14.6 k N;低温时黏结强度提高12%~22%,高温时黏结强度下降19%~40%;双剪试件破坏形态为上端两个BFRP受拉锚固失效,下端两个BFRP拉结件断裂破坏;保温板的存在对试件受剪承载力影响不大,但可以减小破坏时内、外叶板的相对滑移值。
Basalt fiber (BFRP) is the connection of concrete sandwich wall panel in the outer wall panels, the outer wall panels important components, mainly in the insulation wall panels pull pulling load and shear load. In order to study the anchoring and shearing performance of BFRP, the pull-out test and double shear test of 18 center pull-out specimens and 6 double-shear specimens at 5 different temperatures were carried out respectively. The results show that the failure mode of the center specimen is pyramidal-bond failure; the tensile strength of BFRP tendons is 14.6 kN at 25 ℃; the bond strength increases by 12% -22% at low temperature; the bond strength And the failure rate of the two BFRP pull-off pieces at the lower end was less than that of the BFRP specimens at the lower end. The thermal insulation board had little effect on the shear strength of the specimens, Reduce the relative slip value of the inner and outer blades when breaking.