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首页> 美国政府科技报告 >Behavior of High-Strength Concrete Under Sustained Compressive Stress
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Behavior of High-Strength Concrete Under Sustained Compressive Stress

机译：高强混凝土在持续受压应力下的受力性能

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The behavior of plain high-strength concrete subjected to sustained compressive stress is reported. Time-dependent deformational and strength characteristics were investigated. A direct comparison was made to the behavior of normal-strength concrete subjected to similar relative stresses under the same environmental conditions. Deformational behavior related to moisture movements and internal progressive microcracking also was investigated. Sealed and unsealed concrete specimens were analyzed for internal microcracking after being subjected to short-term drying shrinkage and creep strains. Results indicate the following: (1) Time-dependent deformation is less for high-strength concrete than for normal-strength concrete; (2) The amount of internal progressive microcracking associated with short-term shrinkage and creep is considerably less in high-strength concrete than in normal-strength concrete; and (3) The creep-stress relation of high-strength concrete is linear over a larger range than that in normal-strength concrete. Results of an experimental program on the effect of sustained loading on compressive strength are described.

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