【摘要】 本文针对体外预应力混凝土简支梁的受力、变形特点 ,提出了利用能量变分原理计算荷载作用下正常使用阶段体外索中应力增量的方法。该方法把体外预应力混凝土梁看作梁 -索组合体系 ,充分考虑了二者之间的相互作用 ,同时给出了利用能量变分原理导出的实用简化计算公式 ,而且进行了相应的试验验证更多还原

【Abstract】 The paper put forward a method of stress increment under the action of load according to stress and stress characteristic of outside prestressed concrete simple support beam.The method considered the outside prestressed concrete beam as a combined system of beam and cable and also richly considered the mutual effect between two sides,and give simple calculation formula deducted by energy variation principle,and finished relative test verification.更多还原