【摘要】 混凝土现浇楼板开裂主要由于混凝土较大的收缩变形以及温度变形受到约束所致,在现浇楼板裂缝的控制研究中,采用先张法对普通受力钢筋进行张拉,达到减少非荷载引起的裂缝。在研究过程中,应用了多项建筑结构检测技术,如:超声法、回弹法等无损检测技术,并探索了一些新的检测方法,如混凝土表面收缩应力、支座处约束应力的测量,为进行同类研究提供参考。更多还原

【Abstract】 Owing to the contraction distortion and temperature strain of floor structures are restrained,the cracks on foorslab are presented.Based on the purpose of decreaseing the cracks,the rebars are tensioned using pre-tensioning method to control the cracks.In experiment,the ultrasonic inspection and rebound method are used and the new detection methodes of testing the shrinkage stress of concrete structures and restrain stress are researched.更多还原