CAJ | 학술논문

薄壁预应力混凝土构件在工程中应用广泛，例如桥梁工程中的预制T梁及斜拉桥主梁的横隔梁等。由于薄壁且应力较大，偏心、应力集中、混凝土不密实等易造成张拉中出现裂纹、混凝土劈裂的情况。某斜拉桥主梁横隔梁设预应力钢束，截面宽度28cm，为薄壁预应力结构。预应力钢束张拉时，钢束管道弯曲位置出现了混凝土劈裂及裂纹。对此，从设计、施工各环节进行分析，查找原因并针对性地处理及实施预防措施，避免了质量问题的蔓延和损失的扩大，结构满足设计要求。
박벽예응력혼응토구건재공정중응용엄범，례여교량공정중적예제T량급사랍교주량적횡격량등。유우박벽차응력교대，편심、응력집중、혼응토불밀실등역조성장랍중출현렬문、혼응토벽렬적정황。모사랍교주량횡격량설예응력강속，절면관도28cm，위박벽예응력결구。예응력강속장랍시，강속관도만곡위치출현료혼응토벽렬급렬문。대차，종설계、시공각배절진행분석，사조원인병침대성지처리급실시예방조시，피면료질량문제적만연화손실적확대，결구만족설계요구。
Pre-stressed concrete structures of thin wall are widely adopted in projects like precast T beams in bridge engineering and cross beams in ca-ble-stayed bridge. Due to such causes as thin wall, large stress, eccentric, stress concentration and incompact concrete, problems like cracks and concrete splitting are likely to appear. For instance, the cross beam of the main girder of a cable-stayed bridge is a pre-stressed structure of thin wall with steel bun-dle section width of 28cm. when the pre-stressed steel bundle is stretched, the concrete splitting and cracks appear in the bending position of the steel pipe line. In this regard, causes are traced from steps like design and construction to accordingly treat problems and implement preventive measures, in hope of avoiding quality problems worsening and loss deepening with structures meeting design requirements.