关于预应力混凝土构件正截面承载力计算方法的讨论和建议  

Discussion and Recommendation on Calculation Method of Normal Section Bearing Capacity for Prestressed Concrete Member

作　　者：杨春 梁田甜 

机构地区：[1]上海浦东建筑设计研究院有限公司,上海市201204 [2]上海河图工程股份有限公司,上海市201203

出　　处：《城市道桥与防洪》2017年第2期143-145,共3页Urban Roads Bridges & Flood Control

摘　　要：我国混凝土结构设计规范对截面受压区有预应力筋的正截面承载力计算公式的简化处理存在安全隐患。根据应变协调原则,提出了纯弯、压弯和拉弯三种受力模式通用的正截面承载力修正计算公式。利用纤维截面分析软件XTRACT验证了修正公式的正确性和计算精度。There is a security risk in the simplified calculation formula of normal section bearing capacity of prestressed tendons in the section compressive zone in the concrete structure design codes of China Based on the principle of strain coordination,a universal modified calculation formula of normal section bearing capacity for three mechanical modes of pure bending compressive bending and tension bending is proposed.The analysis software XTRACT of fiber section is used to validate the correctness and calculation accuracy of the modified formula.

关 键 词：预应力混凝土构件 正截面承载力 受弯构件 压弯构件 拉弯构件 

分 类 号：TU378[建筑科学—结构工程] U442.51[建筑科学—桥梁与隧道工程]