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发明公开
CN104484551A 预应力混凝土梁板中无粘结筋极限应力增量的建模与计算方法 无效 - 撤回

预应力混凝土梁板中无粘结筋极限应力增量的建模与计算方法
摘要：
预应力混凝土梁板中无粘结筋极限应力增量的建模与计算方法，本发明涉及无粘结筋极限应力增量的建模与计算方法。本发明的目的是为了解决现有无粘结预应力混凝土梁板未考虑主要结构类型、破坏标志、关键参数、无粘结筋布置形式、加载方式以及跨数的问题，影响预应力混凝土梁板中无粘结筋极限应力增量的准确性。具体是按照以下步骤进行的：步骤一、简支预应力混凝土梁板；步骤二、建模；步骤三、计算△σp1。步骤一、基于破坏模式I的连续预应力混凝土梁板中无粘结筋极限应力；步骤二、建模；步骤三、计算△σp2；步骤一、基于破坏模式II的连续预应力混凝土梁板中无粘结筋极限应力；步骤二、建模；步骤三、计算△σp3。本发明应用于无粘结筋极限应力领域。
摘要（英）：

The invention relates to a method for modeling and calculating unbonded rib limit stress increment in prestressed concrete beams and aims to solve the problems that accuracy of unbonded rib limit stress increment in the prestressed concrete beams is affected due to the fact that main structural types, destroy signs, key parameters, unbonded rib arrangement forms, loading patterns and span number of existing unbonded prestressed concrete beams are not considered. The method includes the following steps of step one, simply supporting the prestressed concrete beams, step two, performing modeling, and step three, calculating delta sigma ; step one, calculating the unbonded rib limit stress increment in continuous prestressed concrete beams on the basis of a failure mode I, step two, performing modeling, and step three, calculating delta sigma ; step one, calculating the unbonded rib limit stress increment in the continuous prestressed concrete beams on the basis of a failure mode II, step two, performing modeling, and step three, calculating delta sigma . The method is applied to the field of unbonded rib limit stress.

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