But the values of calculating parameters specified in this specification are only suited to the strength degree of steel fiber reinforced concrete from cf20 to cf40 , it also could not determine the enhancing coefficients of steel fiber to the resistance of reinfoced concrete members by the simple test method of material because these coefficients are not combined with the strength of steel fiber reinforced . therefore , it is important to improve and revise the current specification , especially adding the design method of shear resistance of steel fiber reinforced concrete beams with strength degree from cf40 to cf80 但该规程中规定的计算参数取值仅适用于钢纤维混凝土强度等级cf20 cf40 ，规定的钢纤维混凝土梁受剪承载力计算公式中的钢纤维对斜截面上混凝土抗剪能力的增强系数，未直接与钢纤维混凝土的力学强度指标结合，使工程实践通过试验方法确定公式中钢纤维对斜截面上混凝土抗剪能力的影响系数不能通过比较简便的材料力学性能试验实现。
Based on the project imbrued especially by hunan province construction office , the study of this paper includes four parts as follows : the first part does some simplify on the characters of the rc material under high temperature . after transferring the rc section under fire to equivalent one at normal temperature based on the stiffness and intensity equivalent , the rc members under fire can be calculated as ones at normal temperature 主要研究内容如下: ( 1 )基于刚度等效或强度等效原则,根据截面各点材料力学性能的退化,把受火钢筋混凝土非均匀截面等效成常温下的钢筋混凝土截面,使得高温下构件刚度和强度的计算可按常温下的计算理论进行。
So it is initiative and instructive for the future application of the temporal interferometry on the analysis of the vibration . in the study of the dynamic mechanical behavior of the ballistite material , the material ' s creep curves and the creep velocity curves are successfully obtained using tspm , and whole field displacement distributions 将时间序列散斑干涉计量方法引入材料蠕变特性的研究在国际上尚属首次，该研究对于将来材料力学性能的研究又提供了一有力的分析工具，并为以后该领域的研究提供了有力的理论和实验依据。
This paper used the reactive powder concrete ( rpc ) as the inorganic anchoring material , and studied this material ’ s compositions and the materials mechanics properties ( mainly includes compressive strength , shearing strength , elasticity coefficient and poisson ' s ratio ) , and also studied the contraction , durability ( including the rpc permeability , chemistry corrosiveness and anti - frozen performance ) and the heat - resistance of rpc 本文采用活性粉末混凝土( rpc )为无机锚固材料,并对该材料的配合比,材料力学性能(主要包括抗压强度,抗剪强度,弹性模量和泊松比)进行研究,还分析了rpc的收缩性、耐久性能(包括rpc的渗透性、化学侵蚀性和抗冻性能)和耐高温性能。
