六角形金屬網編織與接合型式之拉伸與貫入試驗

Tensile and Punch Tests of Hexagonal Wire Meshes with Different Weaving and Connection Patterns

謝啓萬(Chiwan-Wayne Hsieh) ； 劉仁聖(Ren-Sheng Liu) ； 劉英偉(Ying-Wei Liu)

《中華水土保持學報》 43卷2期 (2012/06) Pp. 187-195

https://doi.org/10.29417/JCSWC.201206_43(2).0008

摘要

本研究以手工編製模型三圈與四圈六角形金屬網（以下簡稱金屬網）執行其拉伸與貫入特性試驗，除完整試片試驗外，進而將金屬網剪斷中央部位一支金屬線後執行其拉伸與貫入試驗，以模擬金屬網受碰撞斷裂後之行為。實務上金屬網常因接合處斷裂而失效，因此本研究亦針對金屬網接合方式進行試驗。試驗結果顯示，採用三圈與四圈六角形金屬網之極限拉伸強度大致相同。但金屬網達極限荷載時，其中一金屬線斷裂後，三圈六角形金屬網之拉伸量增加較快速，拉伸強度降低亦較明顯。貫入試驗情形亦類似。針對四圈六角形金屬網，拉伸與貫入試驗達尖峰強度後，後續施加應力則由周遭金屬網吸收承擔，因而具較佳之破壞拉伸阻抗。針對接合型式試驗結果顯示，金屬線以六角形凸邊絞接合方式比以直金屬線串接相鄰兩金屬網之接合方式，較能吸收較大之拉力與拉伸量，為較佳之接合型式。

關鍵字

六角形金屬網 ； 箱籠 ； 蛇籠 ； 拉伸試驗 ； 貫入試驗

並列摘要

Triple-twist and fourth-twist model hexagonal wire mesh panels were weaved for tensile and punch tests. The test samples consisted of unbroken wire mesh panels and one central cut wire mesh panels. The binding-joint and twist-joint for the connection of wire mesh panels were also evaluated. The results of the experiments indicated the ultimate tensile strength or punch resistance for triple-twist or fourth-twist hexagonal wire mesh panels was similar. As the test reached the peak tensile force and after one steel wire broke, the tensile force was quickly reduced and the elongation rapidly increased for the triple-twist hexagonal wire mesh. Similar results were also observed for punch tests for triple-twist wire mesh. However, the fourth-twist hexagonal wire panels showed higher tensile and punch resistance after the wire was broken at the center or other locations. In addition, twist- joint enables the provision of higher tensile resistance than for binding joint.

並列關鍵字

Hexagonal wire mesh ； box gabion ； roll gabion ； tensile test ； punch test