| 1. | 3 . the strtistical analysis results improved that the test scatter reduced due to the application of steel fiber 统计分析结果表明,钢纤维的掺人降低了钢筋钢纤维混凝土梁受剪承载力试验结果的离散性。 |
| 2. | - a new load equipment is invented in the model test ; 2 . the model test results indicate : slsfrcp has a better ability to control crack ; slsfsrcp has a better ability to avoid crack 模型试验表明,钢衬钢筋钢纤维混凝上压力管道限裂能力明显增强:钢衬钢筋钢纤维自应力混凝土压力管道则有优良的抗裂能力。 |
| 3. | Based on the axial tension test results of 20 concrete members reinforced with steel bars and fibers , the axial forces and stress were analyzed of steel fiber reinforced concrete ( sfrc ) members 摘要根据20根钢筋钢纤维混凝土轴拉构件的试验结果,分析了钢筋钢纤维砼轴拉构件在受力变形过程中,钢纤维的掺量对构件性能的影响。 |
| 4. | There is no relavant content in corbels in steel fiber reinforced concrete regulations of structural design and construction ( cecs38 : 92 ) . accordingly the design of steel fiber reinforced corbels does not have any regulations to follow 国内现行的《钢纤维混凝土结构设计与施工规程》 ( cecs38 : 92 )也没有相关的内容,使得钢筋钢纤维混凝土牛腿的设计无章可循。 |
| 5. | Steel fiber reduces the size effect of shear resistance of reinforced concrete beams without web reinfocements . the size effect formula is proposed in this paper , it is better agreement with test data . 5 钢纤维对钢筋混凝土无腹筋梁斜截面承载力“尺寸效应”具有降低作用,本文提出了与现行规范相衔接的钢筋钢纤维混凝土腹筋梁斜截面承载力“尺寸效应”计算公式,与现有的试验资料符合良好。 |
| 6. | These can make up the shortcoming of slrcp ; 2 3 . to study the steel stress development of penstock , ring - form slsfsrcp and horse - shoe slsfsrcp during curing period are monitored . the pre - tension stress due to expansion of self - stressing concrete can be used in design ; 4 对圆形和马蹄形管道进行了28天养护期内力监测,研究了钢衬钢筋钢纤维自应力混凝土压力管道的自应力成长过程,明确了钢筋的预拉应力数值,为此类改性管道设计直接提供依据; 4 |
| 7. | For the sake of adding design methods of steel fiber reinforced concrete corbels into technical regulations of steel fiber reinforced concrete , according to the arrangement by the group that edit the regulations , subsidized by the outstanding youth fund of henan province , carries out the experimental study of 22 steel fiber reinforced concrete corbels . the pressurized behavior of steel fiber reinforced concrete corbels is studies rather systematically , and calculative methods and formulas that adapt for pressurized characteristic of steel fiber reinforced concrete corbels are put forward 为了我国新修订的《钢纤维混凝土技术规程》中增加钢筋钢纤维混凝土牛腿设计方法的有关内容,根据规程修订组的分工与安排,在河南省杰出青年基金项目的资助下,本文进行了22个钢筋钢纤维混凝土牛腿试件的试验研究,比较系统地研究了钢筋钢纤维混凝土牛腿的受力性能,提出了适应于钢筋钢纤维混凝土牛腿受力特点的计算方法和相应的公式。 |
| 8. | So , changing the material property of slrcp to decrease the crack width or to avoid the crack to happen is a good method . this method can keep the advantage of slrcp , and at the same time avoid its disadvantage . so , two new slrcp . is presented : steel lined steel fiber reinforced concrete penstock ( slsfrcp ) , steel lined steel fiber self - stress reinforced concrete penstock ( slsfsrcp ) 基于此思路,提出了两种改性钢衬钢筋混凝土压力管道:即钢衬钢筋钢纤维混凝土压力管道、钢材钢筋钢纤维自应力混凝土压力管道,并进行了以下开创性的研究: l以三峡电站压力管道为原型,按相似比1 : 10制作完成了常规钢衬钢筋混凝土压力管道、改性钢材钢筋混凝土压力管道模型。 |
| 9. | The research works and conclusions of this paper as following : 1 . besed on the test results published over the word of reinforced concrete beams without web reinforcements and with stirrups , the systematically statistical analysis is carried out to set up the fomula of shear resistance of reinforced concrete beams using the uniaxial tensile strength of concrete . it provided the basis of strtistical analysis for shear resistance of steel fiber reinforced concrete beams 根据收集到的国内外对钢筋混凝土无腹筋梁和钢筋混凝土有腹筋梁的斜截面承载力试验研究成果,进行了比较系统的综合统计分析,提出了采用混凝土轴心抗拉强度研究成果,进行了比较系统的综合统计分析,提出了采用混凝土轴心抗拉强度指标的钢筋混凝土梁斜截面承载力计算公式,为钢筋钢纤维混凝土梁受剪承载力试验结果的统计分析提供了基础。 |
| 10. | Until now , the domestic and overseas scholar has studied the factors that have effect on performance of steel fiber reinforced concrete corbel such as shear span to depth , strength of concrete , reinforcement ratio ( including longitudinal reinforcement and stirrup ) and ratio of horizontal to vertical load . for calculating the cracking load , and ultimate load domestic and foreign scholar has brought forward a series of calculative formulas and methods have been put forward that based on statistical analysis , flexural model and truss model 到目前为止,国内外学者已研究了剪跨比、混凝土强度、配筋率(包括纵向钢筋和箍筋) 、水平荷载与垂直荷载之比等因素对钢筋钢纤维混凝土牛腿受力性能的影响,对牛腿的抗裂计算和承载力的计算,国内外学者曾提出了基于数理统计分析、弯压模型和桁架模型等的一系列计算方法和计算公式。 |