砖混结构伸缩缝间距增大的尝试

Test of Enlarging the Expansion Joint of Masonry-concrete Structure Buildings

介绍了砖混结构在正常使用条件下伸缩缝产生的原因 ,并结合工程实例、以理论计算公式为依据 ,针对产生裂缝的诸多因素 ,如建筑物长度、温度、材料强度等级等 ,采取了相应的构造措施 ,将影响温度应力的诸多因素一一降低 .并提出了在建筑物长度超出规范规定的一定范围内 (2 0 %左右 )可以不设置伸缩缝的观点 .

The reasons to set the expansion joint of masonry concrete structure under the normal condition are introduced. Based on some theoretical formula, a good many elements contributing to cracks are presented, such as the length of the building, temperature and the strength degrees of materials. Some measures have been taken to decrease the elements that affected temperature stress. A proposal has been put forward that if the length of a building is within a certain scope (about 20%), there will be no need to set extra expansion joint. In recent years, the author has made several engineering surveys.It showed that the designs was successful.It is an effective attempt to enlarge the space between two masonry concrete structure expansion joints.