Distribution of drilling resistance and strength properties at the base of trees

机译：树木基部抗钻强度和强度特性的分布

获取原文

获取原文并翻译 | 示例

页面导航

摘要
著录项
相似文献
相关主题

摘要

As a result of evolution over millions of years biological structures are highly optimised. Beside the aspect of optimum shape and structure the use of suitable material is of main importance to reach highest adaptation to existing loads. At the base of trees external loads are transferred into the soil due to the root swellings. Distribution of drilling resistance and strength properties at the base of trees have been determined for different species having different root systems. The drilling resistance was measured in the root swellings and between them by use of IML-Resi F300 E. Afterwards an increment core was taken from those places and radial and tangential bending strength, shear strength and longitudinal compression strength has been determined by the use of Fractometer Ⅲ. In addition wood anatomical investigations have been done. Dependent on the species different distributions have been established.

机译：经过数百万年的进化，生物结构得到了高度优化。除了最佳形状和结构方面，使用合适的材料对于达到对现有负载的最高适应性至关重要。在树木的根部，由于根部膨胀，外部负载被转移到土壤中。对于具有不同根系的不同物种，已经确定了树木基部的抗钻性和强度特性的分布。使用IML-Resi F300 E在根部膨胀处及其之间测量钻孔阻力。之后，从这些位置获取增量芯，并通过使用以下方法确定径向和切向弯曲强度，剪切强度和纵向抗压强度分数计Ⅲ。另外，已经进行了木材解剖学研究。取决于物种，已经建立了不同的分布。

著录项

来源
《International Symposium on Nondestructive Testing of Wood; 20000913-20000915; Sopron; HU》|2000年|P.207-213|共7页
会议地点 Sopron(HU)
作者
Kappel; R.; Mattheck; C.;
展开▼
作者单位

Institute for Materials Research II, Forschungszentrum Karlsruhe GmbH, P.O.Box 3640, 76021 Karlsruhe, Germany;

展开▼
会议组织
原文格式 PDF
正文语种 eng
中图分类木材产品标准与检验;
关键词

相似文献

外文文献
中文文献
专利

1. Thermodynamic Properties of Dopamine in Aqueous Solution. Acid-Base Properties, Distribution, and Activity Coefficients in NaCl Aqueous Solutions at Different Ionic Strengths and Temperatures [J] . Clemente Bretti, Francesco Crea, Concetta De Stefano Journal of Chemical and Engineering Data: the ACS Journal for Data . 2013,第10期

机译：多巴胺在水溶液中的热力学性质。不同离子强度和温度的NaCl水溶液中的酸碱性质，分布和活度系数
2. Enhanced breakdown strength and electrical tree resistance properties of MMT/SiO2/LDPE multielement composites [J] . Zhang Xiaohong, Shi Zexiang, Ma Lisha, Journal of Applied Polymer Science . 2019,第17a18期

机译：MMT / SiO2 / LDPE多元件复合材料的增强击穿强度和电气树电阻性能
3. Effects of tree selection on strength properties and distribution of structural roots of clonal Sitka spruce [J] . Parr A, Cameron AD Forest Ecology and Management . 2004,第1a2期

机译：树木选择对无性云杉云杉强度特性和根系分布的影响
4. Distribution of drilling resistance and strength properties at the base of trees [C] . Kappel R., Mattheck C. International symposium on nondestructive testing of wood . 2000

机译：树木底部钻孔抗性和强度特性的分布
5. Strengthening mechanisms and mechanical properties of high interstitial stainless steel for drill collar and its corrosion resistance [D] . Lee, Eunkyung 2015

机译：高间隙不锈钢钻collar的强化机理，力学性能及其耐蚀性
6. Continuous depth profile of the rock strength in the Nankai accretionary prism based on drilling performance parameters [O] . Yohei Hamada, Manami Kitamura, Yasuhiro Yamada, -1

机译：基于钻井性能参数的南开增生棱镜中岩石强度的连续深度剖面
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。
8. Drilled Shaft Resistance Based on Diameter, Torque and Crowd (Drilling Resistance vs. Rock Strength) Phase II. Summary. [R] . McVay, M., Rodgers, M. 2016

机译：基于直径，扭矩和人群（钻井阻力与岩石强度）的钻井阻力第二阶段。摘要。

Distribution of drilling resistance and strength properties at the base of trees

摘要

著录项

相似文献

相关主题

期刊订阅