摘要：
Orthogonal tests are designed for hybrid fiber reinforced concrete. Bending toughness of hybrid fiber reinforced concrete, with the substrate intensity C30, the quantity of the volume for the steel fiber dosage 0~1.5% and polypropylene fiber dosage 0~0.3%, are studied. The results show that the hybrid fibers significantly improve the toughness of the concrete matrix. When the dosage reaches to a certain number, the affection of fiber toughness is decreased. Based on the test results the best dosage of hybrid fibers which is the steel fiber 1% mixed with 0.1% polypropylene fiber is recommended.
摘要：
A stress-chemistry method was used to investigate the expansion behavior of mortars made with steel slag sand (SSM). The results indicated that periclase and free CaO were the main mineral components resulted in expansion of SSM by means of volume increment and local stress concentration after hydration. So it can be concluded that stress concentration arised from enrichment and uneven distribution of expansile mineral components was the main reason resulted in the volume expansion of SSM. Model of expansion of SSM was built according to the characteristics of crack and types of versicolor particles.
作者机构：
[李继祥; 刘肖凡] School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China;[李继祥] Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;[张元元] School of Civil Engineering, Wuhan University, Wuhan 430072, China
通讯机构：
School of Civil Engineering and Architecture, Wuhan Polytechnic University, China
摘要：
Rainfall is one of main factors that affect the slope stability. Rainfall infiltration will change the degree of saturation determination of soil, and further influence the pore water pressure and the permeability coefficient of the medium. Based on the saturated-unsaturated seepage theory and the effect of rainfall infiltration, coupled with two phase medium of unsaturated soil and water, numerical simulation of soil slope under rainfall condition is carried out using the strength reduction finite element method. Changes of the slope displacement, pore pressure and safety factor under different rainfall periods and rainfall intensities are discussed. This study can provide important data for the slope stability analysis and landslide prediction.
摘要：
Based of the fact that the theoretical study of the short-leg shear wall falls behind the practice in China, cyclic reversed loading tests on six reinforced short-leg shear walls with 1:2 scales are carried out. The damage form and working capability of the specimen show that the final damage of the specimens are caused by the failure of the connecting beam, which is the weak part of the structure. The loading capacity of SLSW with flanged-walls is better than those without flanged-wall. Finite element analysis software is used to establish a part entity FE model of the SLSW The working performance of the SLSW in the building is analyzed. Based on the test and calculation achievements, some beneficial suggestions are put forwarded for the selection of this structure in high-rise building.
会议名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)
会议时间：
2009-04-26
会议地点：
武汉
会议论文集名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)论文集
关键词：
bench slope;simplified rosenblueth method;reliability;failure probability
摘要：
A bench slope of moraine is selected as the study object. A new method of reliability analysis, that is simplified rosenblueth method, is presented and adopted to analyze the reliability of the bench slope of original design scheme and recommended scheme. The results indicate that the inherent variability of strength, anti-weathering ability and hydro-physical properties of moraine soil primarily affect the high failure probability of benchs. Geometrical factors of slope bring little effects on it. The bench slope with ternary platform widths of 3m, 3m and 15m is recommended and some effective measures such as drainage and revetment are suggested to enhance the stability of the slope.
