预应力混凝土简支梁徐变特性的试验研究

An Experimental Investigation on Creep Property of Simple PC Beams

本文对矩形截面(14×14cm),跨长4. 05米的预应力混凝土简支梁在恒载长期作用下进行了试验研究,测定了混凝土徐变变化规律.以老化理论表示的徐变特性公式对试验测定的混凝土徐变数据进行拟合和计算.值得强调的是试验梁置于自然环境下,与以往的试验完全不同.

In this paper,deflections of some simple prestressed concret model beams with square section of 14×14cm and span of 4. 05munder the action of permanent loads,are experimentallly investigated and the increments of concrete creep are measured.Creepdata measured in the test are simulated and calculated by the concrete formula based on ageing theory.It shall be emphasised thatthe model beams are placed under natural circumstance andthe result thus obtained is totally different from those of the previous tests.