WO2022134931A1 - 一种检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置和方法 - Google Patents

一种检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置和方法 Download PDF

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Publication number
WO2022134931A1
WO2022134931A1 PCT/CN2021/130497 CN2021130497W WO2022134931A1 WO 2022134931 A1 WO2022134931 A1 WO 2022134931A1 CN 2021130497 W CN2021130497 W CN 2021130497W WO 2022134931 A1 WO2022134931 A1 WO 2022134931A1
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Prior art keywords
steel wire
plate
bolt
top plate
bottom plate
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PCT/CN2021/130497
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English (en)
French (fr)
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吴琼
朱晓雄
赵军
薛花娟
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江苏东纲金属制品有限公司
江苏法尔胜缆索有限公司
江苏法尔胜路桥科技有限公司
法尔胜泓昇集团有限公司
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Publication of WO2022134931A1 publication Critical patent/WO2022134931A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
    • G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
    • G01N17/002—Test chambers

Definitions

  • the invention relates to a steel wire detection device with anti-salt spray corrosion performance.
  • Suspension bridges are recognized as one of the bridge types with the strongest spanning ability. From the perspective of the development of bridges in the world, bridges are developing in the direction of longer spans, larger scales, and crossing straits or open seas. At present, proposals for suspension bridges with a single-span span of 2,000 to 3,000 m often appear in the collection of proposals for planning large-scale sea-crossing projects. At the same time, the connection project of mountain roads will also involve the construction of suspension bridges. In the construction of suspension bridges in mountainous areas, new problems have arisen that are different from the construction of suspension bridges over rivers, that is, limited by the terrain of mountainous areas, lack of effective construction sites, many Large equipment and bridge components cannot be transported into the site.
  • the commonly used construction method for the main cable strands of suspension bridges is the prefabricated parallel wire cable strand method.
  • the cable strand is the traction unit, and the method of binding the cable strand to become the main cable.
  • the requirements for traction equipment are high. Therefore, in order to meet the current industry development requirements, new construction methods need to be developed.
  • the air spinning method refers to the method of using the steel wire as the traction unit, weaving multiple steel wires into a steel wire bundle on the catwalk, and then binding the multiple bundles to form the main cable.
  • an endless wire is passed around a cable shoe to form a cable strand.
  • the most significant feature of the air spinning method is that the steel wire needs to be bent at the cable shoe, and the bending radius is relatively small. Therefore, how the dynamic and static load bearing capacity of the steel wire changes after bending needs further experimental research.
  • due to the small bending radius of the steel wire whether the bending state will affect the corrosion resistance of the steel wire, it is necessary to carry out a salt spray comparative test on the corrosion resistance of the steel wire in the bending state and the straight state.
  • the main cable strand of the air spinning method in addition to the tensile stress, the main cable also bears a large bending stress at the local position such as the cable shoe during the operation of the bridge.
  • the traditional corrosion resistance test cannot simulate the corrosion resistance of steel wire under bending stress, so the durability evaluation of high-strength steel wire still has certain limitations.
  • the technical problem to be solved by the present invention is to provide a salt spray corrosion resistance test device for the above-mentioned prior art, which is used to test the salt spray corrosion resistance of bridge cable wires under tensile stress and bending stress state.
  • a device for testing the anti-salt spray corrosion performance of steel wires in a bending tension state comprising a bottom plate, a top plate, a stress loading bolt, a circular arc plate, an anchor, and a stress sensor
  • the top plate is arranged in parallel above the bottom plate
  • the circular arc plate is fixedly arranged on the top plate
  • the two ends of the top plate and the bottom plate are respectively provided with upper and lower corresponding wire through holes
  • the steel wire runs along the circular arc plate
  • the arc surface of the steel wire is bent and laid, the two ends of the steel wire pass down through the wire through holes of the top plate and the bottom plate in turn, and the two ends of the steel wire are anchored at the bottom of the bottom plate by the anchor
  • the stress loading bolt is equipped with a loading nut.
  • the self-locking nut the stress loading bolt is supported between the top plate and the bottom plate to load the bent steel wire with tension
  • the stress sensor is arranged in cooperation with the
  • a plurality of stiffening plates are also included, the stiffening plates are arranged on the circular arc plate, and the stiffening plates are perpendicular to the top plate.
  • the bottom surface of the top plate is provided with bolt positioning counterbores
  • the bottom plate is provided with bolt holes
  • the tops of the stress-loading bolts are correspondingly pushed into the bolt positioning counterbores, and the bottoms pass through the bolt holes
  • the The self-locking nut is screwed on the upper end of the bolt through hole
  • the loading nut is screwed on the lower end of the bolt through hole.
  • the stress sensor is selected from strain gauges, and a plurality of the strain gauges are attached to the steel wire; or the stress sensor is selected from pressure sensors, and there are two pressure sensors, which are respectively arranged on the steel wire. Two anchor ends.
  • the arc surface of the arc plate has a U-shaped section, and the steel wire is laid in the U-shaped groove of the arc surface to react.
  • the stiffening plate is to be provided on the extension line of the stress loading bolt.
  • the bottom end of the stiffening plate starts from the top plate, and the top end is lower or higher than the arc surface of the arc plate or flush with the arc surface, so as to differentiate the load on the arc plate .
  • the anchor has a central through hole for the steel wire to pass through, and the end of the steel wire has a pier head, and the diameter of the pier head is larger than the central through hole, which is used to realize the anchoring of both ends of the steel wire on the bottom, and the bottom plate
  • An anchorage positioning counterbore is set at the bottom, and the anchorage is positioned and installed at the bottom of the bottom plate.
  • Step 1 Bend and lay the steel wire along the arc surface of the circular arc plate and leave both ends of the steel wire.
  • For holes reserve the tensioning length of the steel wire between the bottom plate and the top plate according to the length of the bolt, and head the two ends of the steel wire. anchored to the anchorage;
  • Step 2 Screw the self-locking nut into the stress loading bolt.
  • the bottom of the stress loading bolt passes through the bolt hole on the bottom plate from top to bottom, and then screw the loading nut at the bottom.
  • the top corresponds to the bolt positioning countersunk hole on the top plate. Attach a strain gauge to the wire between the top plate and the anchor or install a pressure sensor between the anchor and the bottom plate, tighten the loading nut, load the wire to 40-70% of the nominal breaking load, and finally tighten the self-locking nut;
  • Step 3 Put the test device loaded in step 2 into the salt spray test box, and make multiple test devices at the same time when testing multiple steel wires to observe the corrosion condition of the steel wires in the bending section.
  • the present invention has the advantages that: the present application develops a device for testing the anti-salt spray corrosion performance of the steel wire under the bending tension state, which simulates the bending of the main cable wire at the cable shoe by the aerial spinning method of the suspension bridge.
  • the load state of the segment is used to evaluate the salt spray corrosion resistance of the wire in the bending section of the cable saddle.
  • Fig. 1 is the structural representation of the test apparatus of the present invention
  • Fig. 2 is the sectional view of the bottom plate of the present invention.
  • Fig. 3 is the top view of the bottom plate of the present invention.
  • Fig. 4 is the sectional view of the top plate of the present invention.
  • Fig. 5 is the top view of the top plate of the present invention.
  • Fig. 6 is the structural schematic diagram of the stress loading bolt of the present invention.
  • Fig. 7 is the front view of the arc plate of the present invention.
  • Fig. 8 is the right side view of the arc plate of the present invention.
  • Fig. 9 is the sectional view of the anchor of the present invention.
  • Figure 10 is an assembly diagram of a test device using strain gauges as stress inductors according to the present invention.
  • FIG. 11 is an assembly diagram of a test device using a pressure sensor as a stress sensor according to the present invention.
  • bottom plate 1 top plate 2, stress loading bolt 3, arc plate 4, stiffening plate 5, anchor 6, loading nut 7, self-locking nut 8, strain gauge 9, pressure sensor 10, bolt through hole 101, bolt Positioning countersunk hole 201 , central through hole 601 , steel wire 11 , threading through hole 102 .
  • the test device for testing the anti-salt spray corrosion performance of the steel wire in the bending tension state in this embodiment includes a bottom plate 1, a top plate 2, a stress loading bolt 3, a circular arc plate 4, an anchor 6, a stress sensor such as a strain gauge 9 or pressure sensor 10, stress loading bolt 3 is equipped with loading nut 7 and self-locking nut 8.
  • the top plate 2 is arranged in parallel above the bottom plate 1 , both of which are strip-shaped plates.
  • the arc plate 4 is a semi-circular structure, and the bottom straight edge is welded and fixed on the top plate 2 .
  • the bottom plate 1 is a stainless steel plate with a thickness of 20 to 50 mm, and a circular arc-shaped opening slot with a width of 5 to 7 mm is set at each end as a wire through hole, so that the steel wire 11 can pass through.
  • An anchor positioning counterbore is processed at the hole, the diameter of the anchorage positioning counterbore is 1.05 times to 1.10 times the diameter of the anchor cup, and the anchorage positioning counterbore depth is 2mm to 3mm.
  • Two bolt through holes 101 with a diameter of 20-30 mm are symmetrically arranged on the base plate 1, and a plurality of bolt through holes 101 can also be opened according to the length and force requirements of the base plate.
  • two symmetrical bolt through holes 101 are arranged on the base plate 1.
  • the top plate 2 is a stainless steel plate with a thickness of 5-10mm, the length is the same as that of the bottom plate 1, and the two ends are provided with arc-shaped opening grooves with a width of 5-7mm as through holes for threading.
  • 201 corresponds up and down with the bolt through holes 101 on the base plate 1 .
  • the arc plate 4 adopts a stainless steel plate with a thickness of not less than 8mm.
  • Three stiffening plates 5 are arranged on the surface of the arc plate 4, the ends of which are welded with the bottom edge of the arc plate, and the top of the arc surface on the top of the arc plate is a plane or an inner arc, preferably an inner arc, so as to
  • An arc groove is formed on the arc surface of the arc plate, and the width of the groove is the same as the thickness of the arc plate 4, which is used to prevent the wire from running out of the slot, so that the wire is always in the center position to prevent the wire from slipping out.
  • the stiffening plate 5 is a stainless steel plate with a thickness of 5-10 mm, and two of the stiffening plates correspond to the positions of the stress loading bolts 3 .
  • the stress-loading bolts 3 are supported between the top plate 2 and the bottom plate 1 for loading tension on the bent steel wire.
  • the bottom passes through the bolt hole 101 of the bottom plate 1 from top to bottom, the self-locking nut 8 is screwed on the upper end of the bolt hole 101 , and the loading nut 7 is screwed on the lower end of the bolt hole 101 .
  • the stress sensor cooperates with the steel wire 11 and is arranged to sense the tension of the steel wire.
  • the stress sensor can be a strain gauge 9, and a plurality of strain gauges 9 are attached to the steel wire; or a pressure sensor 10 can be used, and there are two pressure sensors 10, which are respectively arranged at the two anchor ends of the steel wire, that is, on the anchorage 6 and the bottom plate. between 1.
  • the anchor 6 has a central through hole 601 for the steel wire 11 to pass through.
  • the anchor 6 is made of 45-gauge steel or stainless steel. If 45-gauge steel is used, the anchor must be anti-corrosion treated during the test.
  • the diameter of the central through hole of the anchor 6 is 5-8 mm, so that the steel wire 11 can pass through.
  • This embodiment relates to the operation method of the anti-salt spray corrosion performance of the steel wire under the bending tension state, including the following steps:
  • Step 1 Bend and lay the steel wire 11 along the arc surface of the arc plate 4, lay the steel wire in the arc groove, and leave two ends of the steel wire symmetrically, and the two ends of the steel wire pass through the top plate 2 and the bottom plate 1 in turn.
  • the wire through holes of the 1 and then through the central through holes of the anchors 6 respectively, reserve the wire tension length between the bottom plate 1 and the top plate 2 according to the length of the bolts, and upsetting both ends of the wire, and the diameter of the upsetting head is not smaller than the wire 1.5 times the diameter, the height of the heading is not less than 1 times the diameter of the steel wire, and the anchorage 6 is set corresponding to the anchorage positioning counterbore on the bottom plate 1.
  • Step 2 Screw the self-locking nut 8 into the thread at the lower end of the stress loading bolt 3, the bottom of the stress loading bolt 3 passes through the bolt hole 101 on the bottom plate 1 from top to bottom, and then screw the loading nut 7 into the bottom, and the stress loading bolt 3.
  • the top corresponds to the bolt positioning counterbore 201 pushed into the top plate 2, and the strain gauge 9 is pasted on the steel wire between the bottom plate 1 and the top plate 2, and the strain gauge 9 is also pasted on the wire on the top of the arc plate 4.
  • Step 3 Put the test device loaded in step 2 into the salt spray test box to observe the corrosion condition of the steel wire in the bending section.
  • the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the claims of the present invention.

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Abstract

一种检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置和方法，包括底板(1)、顶板(2)、应力加载螺栓(3)、圆弧板(4)、锚具(6)、应力感应器，顶板(2)平行设置在底板(1)上方，圆弧板(4)固定在顶板(2)上，钢丝沿圆弧板(4)的圆弧面弯曲铺设，钢丝的两端分别向下穿过顶板(2)和底板(1)的穿丝通孔，钢丝两端再通过锚具(6)锚固在底板(1)底部，应力加载螺栓(3)配置加载螺母(7)和自锁螺母(8)，支撑在顶板(2)和底板(1)之间给弯曲的钢丝加载张力，应力感应器用于感应钢丝的加载载荷。模拟悬索桥空中纺线法钢丝在索鞍弯曲段的载荷状态，用于评估钢丝在索鞍弯曲段的抗盐雾腐蚀性能。

Description

一种检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置和方法 技术领域
本发明涉及一种抗盐雾腐蚀性能的钢丝检测装置。
背景技术
悬索桥是公认的跨越能力最强的桥型之一，从世界桥梁发展看，桥梁在向跨度更长，规模更大，跨越海峡或外海的方向发展。目前，规划大型跨海工程的征集方案中常会出现了单跨跨径达到2000～3000m的悬索桥方案。与此同时，山区公路的连通工程中也会涉及悬索桥的建设，在山区悬索桥的施工当中出现了有别于江河上悬索桥施工的新问题，即受到山区地形的限制你、施工有效场地不足，许多大型设备和桥梁构件无法运输进场。悬索桥主缆索股目前常用的施工方法为预制平行钢丝索股法。索股为牵引单元，将索股绑扎成为主缆的方法。同时由于大跨度悬索桥主缆索股重，对牵引设备要求高。因此，为满足当前行业发展要求，需要开发新型的施工方法。
空中纺线法指的是以钢丝为牵引单元，在猫道上将多根钢丝编制成一根钢丝束股，再将多束束股绑扎形成主缆的方法。在空中纺线法中，无端头钢丝绕过索靴形成索股。空中纺线法与预制平行钢丝索股法相比，最为显著的特点是钢丝在索靴处要进行弯曲，且弯曲半径相对较小。因此，弯曲后钢丝的动静载承载能力如何变化则需要做进一步的试验研究。另外，由于钢丝弯曲半径较小，该弯曲状态是否会影响钢丝的的抗腐蚀性能，需要对此钢丝弯曲状态下与直线状态下的抗腐蚀性能进行相关的盐雾对比试验。
对于空中纺线法的主缆索股，主缆在桥梁运营期间，除了承受拉应力外，在局部位置如索靴处还承受着较大的弯曲应力。传统的抗腐蚀试验无法模拟钢丝在弯曲应力下抗腐蚀性能，因而对高强钢丝的耐久性评价仍具有一定的局限性。
发明内容
本发明所要解决的技术问题是针对上述现有技术提供一种抗盐雾腐蚀性能的试验装置，用于检验桥梁缆索钢丝在拉应力和弯曲应力状态下的抗盐雾腐蚀性能。
本发明解决上述问题所采用的技术方案为：一种检验钢丝在弯曲张拉状态下的抗盐 雾腐蚀性能的装置，包括底板、顶板、应力加载螺栓、圆弧板、锚具、应力感应器，所述顶板平行设置在所述底板上方，所述圆弧板固定设置在所述顶板上，所述顶板和底板的两端分别设置上下对应的穿丝通孔，钢丝沿所述圆弧板的圆弧面弯曲铺设，钢丝的两端分别依次向下穿过顶板和底板的所述穿丝通孔，钢丝两端再通过所述锚具锚固在底板底部，所述应力加载螺栓配置加载螺母和自锁螺母，所述应力加载螺栓支撑在所述顶板和底板之间给弯曲的钢丝加载张力，所述应力感应器与钢丝配合设置用于感应钢丝的张力。
优选地，还包括多条加劲板，所述加劲板设置在所述圆弧板上，所述加劲板垂直于所述顶板。
优选地，所述应力加载螺栓有两支，对称设置在所述顶板和底板之间，用于均匀地给钢丝加载载荷。
优选地，所述顶板的底面设置螺栓定位沉孔，所述底板上设置螺栓穿孔，所述应力加载螺栓的顶部对应顶在所述螺栓定位沉孔内，底部穿过所述螺栓穿孔，所述自锁螺母拧在所述螺栓穿孔的上端，所述加载螺母拧在所述螺栓穿孔的下端。
优选地，所述应力感应器选自应变片，多个所述应变片贴在所述钢丝上；或者所述应力感应器选自压力传感器，所述压力传感器有两个，分别设置在钢丝的两锚固端。
优选地，所述圆弧板的圆弧面具有U型截面，钢丝铺设在圆弧面的U型槽内，从而反应。
优选地，所述应力加载螺栓的延长线上要设置所述加劲板。
优选地，所述加劲板的底端起始于所述顶板，顶端低于或高于所述圆弧板的圆弧面或与所述圆弧面齐平，以分化圆弧板上的载荷。
优选地，所述锚具具有供所述钢丝穿过的中心通孔，钢丝的端部墩头，墩头直径大于所述中心通孔，用于实现钢丝两端在底部上的锚固，底板的底部设置锚具定位沉孔，配合锚具在底板底部定位安装。
采用上述装置检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的方法，操作如下
步骤一、将钢丝沿着圆弧板的圆弧面弯曲铺设并留出钢丝两端，钢丝两端穿过依次穿过顶板和底板上的穿丝通孔，再分别穿过锚具的中心通孔，在底板和顶板之间根据螺栓长度预留钢丝张拉长度，将钢丝两端进行镦头，镦头直径不小于钢丝直径的1.5倍，镦头高度不小于钢丝直径的1倍，让钢丝锚固在锚具上；
步骤二、将自锁螺母旋入应力加载螺栓，应力加载螺栓底部从上向下穿过底板上的 螺栓穿孔，底部再旋入加载螺母，顶部对应顶入顶板上的螺栓定位沉孔，在底板和顶板之间的钢丝上贴上应变片或者在锚具与底板之间安装压力传感器，旋紧加载螺母，给钢丝加载至40～70％的公称破断载荷，最后旋紧自锁螺母；
步骤三、将步骤二装载好的试验装置放入盐雾试验箱，在进行多根钢丝试验时可同时制作多个试验装置，观察弯曲段钢丝的腐蚀状况。
与现有技术相比，本发明的优点在于：本申请开发了一种检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置，模拟悬索桥空中纺线法主缆钢丝在索靴处弯曲段的载荷状态，用于评估钢丝在索鞍弯曲段的抗盐雾腐蚀性能。
附图说明
图1为本发明试验装置的结构示意图；
图2为本发明底板的剖视图；
图3为本发明底板的俯视图；
图4为本发明顶板的剖视图；
图5为本发明顶板的俯视图；
图6为本发明应力加载螺栓的结构示意图；
图7为本发明圆弧板的正视图；
图8为本发明圆弧板的右视图；
图9为本发明锚具的剖视图；
图10为本发明采用应变片作为应力感应器的试验装置组装图；
图11为本发明采用压力传感器作为应力感应器的试验装置组装图；
图12为本发明试验装置的盐雾试验示意图；
图中：底板1、顶板2、应力加载螺栓3、圆弧板4、加劲板5、锚具6、加载螺母7、自锁螺母8、应变片9、压力传感器10、螺栓通孔101、螺栓定位沉孔201、中心通孔601、钢丝11、穿丝通孔102。
具体实施方式
以下结合附图对本发明作进一步详细描述，所述实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。本实施例中的文字描述是与附图对应的，涉及方位的描述也是基于附图的描述，不应理解为是对本发明保护范围的限制。
实施例1
本实施例中的检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的试验装置，包括底板1、顶板2、应力加载螺栓3、圆弧板4、锚具6、应力感应器如应变片9或压力传感器10，应力加载螺栓3配置加载螺母7和自锁螺母8。
顶板2平行设置在底板1上方，二者均属于条形板，圆弧板4为半圆形结构，底部直边焊接固定在顶板2上。其中底板1为厚度为20～50mm厚的不锈钢板，两端各设置一个宽度为5～7mm的圆弧形开口槽作为穿丝通孔，以便于钢丝11穿过，底板1下平面穿丝通孔处加工出锚具定位沉孔，锚具定位沉孔直径为锚杯直径的1.05倍～1.10倍，锚具定位沉孔深度为2mm～3mm。底板1上对称设置两个孔径为20～30mm的螺栓通孔101，也可根据底板长度和受力要求开设多个螺栓通孔101，本实施例在底板1上设置有两个对称的螺栓通孔101。顶板2为厚度5～10mm的不锈钢板，长度与底板1一致，两端开设宽度为5～7mm的圆弧形开口槽作为穿丝通孔，底面加工出螺栓定位沉孔201，螺栓定位沉孔201与底板1上的螺栓通孔101上下对应。
圆弧板4采用厚度不小于8mm的不锈钢板。在圆弧板4表面上并设置三处加劲板5，其端部与圆弧板底部边缘焊接，圆弧板顶部的弧形面顶部为平面或者内圆弧形，优选内圆弧形，从而在圆弧板的圆弧面上成型出圆弧槽，槽宽与圆弧板4厚度一致，用于防止钢丝跑出槽口，让钢丝始终位于中心位置，防止钢丝滑出。加劲板5采用厚度5～10mm的不锈钢板，其中两处加劲板与应力加载螺栓3的位置对应。
应力加载螺栓3支撑在顶板2和底板1之间用于给弯曲的钢丝加载张力，本实施例中应力加载螺栓3有两支，应力加载螺栓3的顶部抵在顶板2的螺栓定位沉孔201内，底部自上向下穿过底板1的螺栓穿孔101，自锁螺母8拧在螺栓穿孔101的上端，加载螺母7拧在所述螺栓穿孔101的下端。
应力感应器与钢丝11配合设置用于感应钢丝的张力。应力感应器可以是应变片9，多个应变片9贴在钢丝上；或者还可以采用压力传感器10，压力传感器10有两个，分别设置在钢丝的两锚固端，即位于锚具6和底板1之间。
锚具6具有供钢丝11穿过的中心通孔601，锚具6采用45号钢或不锈钢，若采用45号钢，试验时需对锚具进行防腐处理。锚具6中心通孔孔径为5～8mm，以便于钢丝11穿过，钢丝的端部墩头，墩头直径大于所述中心通孔601，底板1的底面设置锚具定位沉孔。
实施例2
本实施例涉及钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的操作方法，包括如下步骤：
步骤一、将钢丝11沿着圆弧板4的圆弧面弯曲铺设，钢丝铺设在圆弧槽内，并对称的留出钢丝两端，钢丝两端穿过依次穿过顶板2和底板1上的穿丝通孔，再分别穿过锚具6的中心通孔，在底板1和顶板2之间根据螺栓长度预留钢丝张拉长度，将钢丝两端进行镦头，镦头直径不小于钢丝直径的1.5倍，镦头高度不小于钢丝直径的1倍，锚具6对应底板1上的锚具定位沉孔设置。
步骤二、将自锁螺母8旋入应力加载螺栓3下端的螺纹上，应力加载螺栓3底部从上向下再穿过底板1上的螺栓穿孔101，底部再旋入加载螺母7，应力加载螺栓3顶部对应顶入顶板2上的螺栓定位沉孔201，在底板1和顶板2之间的钢丝上贴上应变片9，在圆弧板4顶部的钢丝上也贴上应变片9，旋紧加载螺母7，让应力加载螺栓3的上下端顶撑顶2和底板1，从而给钢丝加载张力，直至给钢丝11加载至40～70％的公称破断载荷，最后旋紧自锁螺母8，让钢丝保持受加载的状态，注意：应力加载螺栓3与顶板2、底板1须保持垂直。
步骤三、将步骤二装载好的试验装置放入盐雾试验箱，观察弯曲段钢丝的腐蚀状况。
除上述实施例外，本发明还包括有其他实施方式，凡采用等同变换或者等效替换方式形成的技术方案，均应落入本发明权利要求的保护范围之内。

Claims (10)

  1. 一种检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置，其特征在于：包括底板(1)、顶板(2)、应力加载螺栓(3)、圆弧板(4)、锚具(6)、应力感应器，所述顶板(2)平行设置在所述底板(1)上方，所述圆弧板(4)固定设置在所述顶板(2)上，所述顶板(2)和底板(1)的两端分别设置上下对应的穿丝通孔，钢丝沿所述圆弧板(4)的圆弧面弯曲铺设，钢丝的两端分别依次向下穿过顶板(2)和底板(1)的所述穿丝通孔，钢丝两端再通过所述锚具(6)锚固在底板(1)底部，所述应力加载螺栓(3)配置加载螺母(7)和自锁螺母(8)，所述应力加载螺栓(3)支撑在所述顶板(2)和底板(1)之间给弯曲的钢丝加载张力，所述应力感应器与钢丝配合设置用于感应钢丝的张力。
  2. 根据权利要求1所述的检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置，其特征在于：还包括多条加劲板(5)，所述加劲板(5)设置在所述圆弧板(4)上，所述加劲板(5)垂直于所述顶板(2)。
  3. 根据权利要求2所述的检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置，其特征在于：所述应力加载螺栓(3)有两支，对称设置在所述顶板(2)和底板(1)之间。
  4. 根据权利要求1所述的检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置，其特征在于：所述顶板(2)的底面设置螺栓定位沉孔(201)，所述底板(1)上设置螺栓穿孔(101)，所述应力加载螺栓(3)的顶部对应顶在所述螺栓定位沉孔(201)内，底部穿过所述螺栓穿孔(101)，所述自锁螺母(8)拧在所述螺栓穿孔(101)的上端，所述加载螺母(7)拧在所述螺栓穿孔(101)的下端。
  5. 根据权利要求1所述的检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置，其特征在于：所述应力感应器选自应变片(9)，多个所述应变片(9)贴在所述钢丝上；或者所述应力感应器选自压力传感器(10)，所述压力传感器(10)有两个，分别设置在钢丝的两锚固端。
  6. 根据权利要求1所述的检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置，其特征在于：所述圆弧板(4)的圆弧面具有U型截面，钢丝铺设在圆弧面的U型槽内。
  7. 根据权利要求2所述的检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置， 其特征在于：所述应力加载螺栓(3)的延长线上要设置所述加劲板(5)。
  8. 根据权利要求2所述的检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置，其特征在于：所述加劲板(5)的底端起始于所述顶板(2)，顶端低于或高于所述圆弧板的圆弧面或与所述圆弧面齐平。
  9. 根据权利要求1所述的检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的装置，其特征在于：所述锚具(6)具有供所述钢丝穿过的中心通孔(601)，钢丝的端部墩头，墩头直径大于所述中心通孔(601)，所述底板(1)的底面设置锚具定位沉孔。
  10. 一种利用权利要求1-9所述装置检验钢丝在弯曲张拉状态下的抗盐雾腐蚀性能的方法，其特征在于：包括
    步骤一、将钢丝沿着圆弧板(4)的圆弧面弯曲铺设并留出钢丝两端，钢丝两端穿过依次穿过顶板(2)和底板(1)上的穿丝通孔，再分别穿过锚具(6)的中心通孔，在底板(1)和顶板(2)之间根据螺栓长度预留钢丝张拉长度，将钢丝两端进行镦头，镦头直径不小于钢丝直径的1.5倍，镦头高度不小于钢丝直径的1倍；
    步骤二、将自锁螺母(8)旋入应力加载螺栓(3)，应力加载螺栓(3)底部从上向下穿过底板(1)上的螺栓穿孔(101)，底部再旋入加载螺母(7)，顶部对应顶入顶板(2)上的螺栓定位沉孔(201)，在底板(1)和顶板(2)之间的钢丝上贴上应变片(9)或者在锚具(6)与底板(1)之间安装压力传感器(10)，旋紧加载螺母(7)，给钢丝加载至40～70％的公称破断载荷，最后旋紧自锁螺母(8)；
    步骤三、将步骤二装载好的试验装置放入盐雾试验箱，在进行多根钢丝试验时可同时制作多个试验装置，观察弯曲段钢丝的腐蚀状况。
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