Water quality - determination of fluoride - part 2 : determination of inorganically bound total fluoride after digestion and distillation 水质.氟化物的测定.第2部分:蒸解和蒸馏后无机结合氟化物总量的测定
2.
According to the anchoring material difference , post - installed bars may include organically post - installed bars and inorganically post - installed bars 植筋按照粘结材料的不同,可分为有机植筋和无机植筋两类。
3.
Water quality - physical , chemical and biochemical methods - determination of inorganically bound total fluoride after digestion and distillation 水质.第2部分:物理化学和生物化学法.第48节:分解蒸馏后无机胶粘剂氟化物总含量测定
4.
Inorganically post - installed bars although have the ideal durability and heat - resistance , its bonding strength is low . it is unable effectively to transmit the load , the anchor depth is too big . these restricted application of the inorganic anchoring material in the post - installed fastening project 无机植筋虽有较理想的耐久性能和耐高温性,但其粘结强度较低,无法有效传递荷载应力,锚固深度太大,这制约了无机粘结材料在植筋工程中的应用。
5.
The fastened end of bar was machined to multi cone - shaped heads . through the cone heads compress the inorganic anchoring material , the load was transmitted from bars to base material . it changes the transfer path of loads and takes advantage of high compress strength of inorganic material , thus enhanced the anchor intensity of inorganically post - installed bars 本文提出一种新型的植筋技术? ?带锥头无机植筋,它把钢筋锚固端加工成多个锥头,通过锥头对无机锚固材料的挤压,将荷载传递给基材,使基材与无机锚固材料的界面上产生剪压复合应力状态,改变传统植筋的受力机理,利用了无机锚固材料抗压强度高的特点,从而提高了无机植筋的锚固强度。
6.
Through the pull - out experiment , the load displacement curve was obtained . contrasting the test results under the different condition to post - installed bar , it was clear about the mechanism of the inorganically post - installed bars . the test results of inorganically post - installed bars was compared especially with the traditional organically post ? installed bars 通过拉拔试验,得到了荷载位移曲线,对比了不同条件下植筋的试验结果,明确了无机植筋的受力过程,特别同有机植筋进行对比,并提出了带锥头无机植筋的施工工艺。
7.
According to the test result , the mechanism of inorganically post - installed bars with cone - shaped heads was analyzed . and then the anchor intensity formula was formulated . the inorganically post - installed bars with cone - shaped head was carried on the finite element analysis on the spatial axial symmetry model 根据试验结果,对带锥头无机植筋的受力机理进行了理论分析,推导出带锥头无机植筋的锚固强度公式,并利用空间轴对称模型对带锥头无机植筋进行了有限元分析,提出了利用杆单元模拟钢筋与混凝土之间的粘结滑移关系的方法。
