【摘要】 本文以能量变分法为理论基础。通过大量的计算分析提出了能量变分法计算体外预应力简支梁体系在外荷载作用下体外索中应力增量的实用简化计算公式。在此基础上研究了体外预应力桥梁正常使用阶段应力、变形和裂缝宽度的计算方法,而且进行了相应的试验研究。更多还原

【Abstract】 Based on energy variational theory, the paper presents a simplified calculation equation of stress increment for external prestressing free beams. And the paper also gives the calculation method about the stress, deflection and crack width of external prestressing bridges ing employ stage, the corresponding experimental research having been dore.更多还原