| CFRP筋复合式锚具锚固性能的试验研究 |
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| 引用本文： | 蒋田勇,方志.CFRP筋复合式锚具锚固性能的试验研究[J].土木工程学报,2010(2). |
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| 作者姓名： | 蒋田勇 方志 |
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| 作者单位： | 长沙理工大学;湖南大学; |
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| 基金项目： | 国家自然科学基金(50478052) |
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| 摘 要： | 当复合材料FRP(Fiber Reinforced Polymer/Plastics)筋或拉索应用到斜拉桥的拉索体系时,黏结式锚具和夹片式锚具均有其自身的局限性。对此,根据普通拉索锚固体系的特点,并结合CFRP筋夹片式锚具和黏结式锚具的研究成果,提出了锚固CFRP筋的复合式锚具。复合式锚具由楔紧锚固端和黏结锚固端组成,其中楔紧锚固端包括锚杯、带有凹齿的夹片、铝套管以及塑料薄膜,黏结锚固端包括钢套筒和黏结介质活性粉末混凝土RPC(Reactive Power Concrete)。静载试验研究了锚杯长度、钢套筒长度、夹片预紧力、筋材预张拉力等试验参数对复合式锚具锚固性能的影响。试验结果表明,复合式锚具的试件极限荷载最大为208kN,相应的锚固效率系数为104%,大于95%,满足规范要求。复合式锚具两种锚固形式的锚固长度较合理组合为:对不预张拉锚具,锚杯长度40mm,黏结锚固长度100mm;对预张拉锚具,锚杯长度60mm,黏结锚固长度60mm。提出的复合式锚具极限荷载计算式具有较好的适用性。
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| 关 键 词： | 锚固性能 复合式锚具 CFRP RPC |
Experimental investigation on the performance of wedge-bond anchors for CFRP tendons |
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| Jiang Tianyong Fang Zhi.Experimental investigation on the performance of wedge-bond anchors for CFRP tendons[J].China Civil Engineering Journal,2010(2). |
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| Authors: | Jiang Tianyong Fang Zhi |
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| Affiliation: | Jiang Tianyong1 Fang Zhi2(1. Changsha University of Science , Technology,Changsha 410076,China,2. Hunan University,Changsha 410082,China) |
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| Abstract: | When composite material FRP(Fiber Reinforced Polymer/Plastics) tendon is employed in cable-stayed bridges,usage of wedge-type anchor and bond-type anchor for FRP tendons is limited due to their shortcomings. Based on the characteristics of conventional anchorage systems for steel/strands with wedge and bond media,a wedge-bond anchor comprised of wedge anchorage and bond anchorage for CFRP tendons is presented. The wedge anchorage end includes smooth indented wedges,conical barrel,a plastic film,and an alumi... |
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| Keywords: | anchorage performance wedge-bond type anchor CFRP RPC |
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