The current design code provisions have specified the allowable compressive stresses of concrete at prestress transfer in an empirical manner, and it was simply expressed only as the function of concrete compressive strength at the time of transfer. In contrast, the Strength Design Method (SDM) ...
10.allowable bearing stress for concrete foundation混凝土基础的许用承压应力 11.Calculating the Permissible Value of the Check Coefficient for Prestressed Concrete Crack Resistance Based on Degree of Prestress;用“预应力度法”计算构件抗裂检验系数容许值 12.Investigation into Permissible Tensional Prestress of ...
A method for calculating allowable stresses on curved sheet-stiffener panels under the combined action of compression and shear : an... Fatigue strength and allowable design stresses for some wood composites used in furniture Investigation on allowable compressive stresses in pretensioned concrete members...
1, where the ultimate strength should not be smaller than the applied design loads with an adequate margin of safety [2]. In the AWSDM, point B remains unknown although a simplified buckling strength check represented by point A may be applied. This means that the AWSDM is unable to ...
Electrochemical characterization and time-variant structural reliability assessment of post-tensioned, segmental concrete bridges In post-tensioned (PT) bridges, prestressing steel tendons are the major load carryingcomponents. These tendons consist of strands, ducts, and cementitious... RP Gopalakrishnan -...
Productivity of the pretensioned members, however, is significantly influenced by the timing of releasing prestress, because prestressing forces can be transferred when the target compressive strength of early age concrete is attained. Unfortunately, the allowable compressive stress at transfer specified in...
release stress is as follows: The compressive stress limit for pretensioned and post-tensioned concrete components, including segmentally constructed bridges, shall be 0.60f'(sub ci). In the past several years, there has been significant interest in increasing the allowable limit of 0.60f'(sub ci...
The yield strength of CFT columns is determined by 2/3 of compressive force of concrete in most cases. And the yield strength of CFT columns is smaller than the allowable strength. However, as an important index representing the damage state of CFT column, the stress state of steel tube ...
The survey indicated that mass concrete with satisfactory strength and durability may be obtained with w/c in excess of the maximums presently allowed. Therefore, a laboratory investigation was conducted to confirm or disprove these indications. A series of mass concrete mixtures containing 6-in. ...
PURPOSE: A hybrid column of a centrifugal concrete tube and a steel-frame reinforcing bar is provided to replace the superannuated H-beam column effectively by increasing compressive strength compared with the existing PHC pile. ;CONSTITUTION: A hybrid column of a centrifugal concrete tube and a...