stress limiteffective prestressIn current design codes, crack control design criterion for prestressed concrete (PSC) members is stricter than conventional reinforced concrete (RC) members. In particular, it is stipulated that the net tensile stress of prestressing strands should be controlled under 250...
建立SRM的思路可以扩展到3DEC中, 使用Voronoi块体表示混凝土,与DFN相结合能够模拟混凝土真实的破坏行为. 不过这种计算代价太大,需要性能非常高的计算机才能在短时间内得出结果。 [1] E.I. Al-Sahawneh Size effect and strength correction factors for normal weight concrete specimens under uniaxial compression str...
In current design codes, crack control design criterion for prestressed concrete (PSC) members is stricter than conventional reinforced concrete (RC) members. In particular, it is stipulated that the net tensile stress of prestressing strands should be controlled under 250 MPa in the serviceability de...
Under tensile stress, concrete fails at low average strain but a high local strain due to nonuniform strain distribution. It is demonstrated that the use of optical interferometry with laser light both provides adequate sensitivity and allows measurement of strain over a wide field. The measurement...
a Dept of Reinforced Concrete Structures, Vilnius Gediminas Technical University, Saul?tekio al. 11, 2040, Vilnius, LithuaniaTaylor & Francis GroupStatybaG. Kaklauskas. A New Stress-Strain Relationship for Cracked Tensile Concrete in Flexure II Statyba, Vol V, No 6. Vilnius: Technika, 1999, ...
In addition, there are technological functions such as control of speed,tensile stress,torque and load distribution. voith.com voith.com 此外,其具备的技术功能还包括控制速度、拉伸应力、扭矩和载荷分配。 voith.com voith.com [...] introduced by peening will reduce and often negate ...
High speed photography of dynamic tests showed that cracking initiated in the region of maximum tensile stress. The splitting tensile strength of concrete was both size and rate dependent. In this study, the ratio of dynamic to quasi-static strength was about 4.5 at strain rates of 70 per ...
Fracture arrest concepts applied to closely spaced wire reinforced concrete have revealed that tensile stress is proportional to the inverse square root of wire spacing. Previous theoretical and experimental studies have demon-strated this for the case of continuous wires arranged parallel to one another...
===> stress limit 0.25 * sqrt(fc’) (MPa) 2. Question I am participating in the design of Prestressed Concrete Box Girder. We usually use deicing salt in this area in winter. In the case of top slab, which criteria(above 1.(2)) we should follow?
2(a). A zoomed view of this figure showing the elastic region, as well as the inelastic stress–strain curve up to 0.2% strain is shown in Fig. 2(b). Although this figure shows an increase in the elastic moduli of dogbones with strain rate, it underestimates the modulus at each ...