用预压应力来控制砌块砌体房屋温度裂缝的探讨  

DISCUSSION ON THE CONTROL ON TEMPERATURE CRACKS OFBLOCK MASONRY STRUCTURE USING COMPRESSIVE PRESTRESS

作　　者：郭樟根[1] 曹双寅[1] 孙伟民[2] 

机构地区：[1]东南大学土木工程学院,南京210096 [2]南京工业大学土木工程学院,南京210009

出　　处：《工业建筑》2004年第10期88-90,共3页Industrial Construction

基　　金：江苏省科技厅资助项目 (项目号 :BS2 0 0 0 10 2 )

摘　　要：混凝土小型空心砌块是近年来提出代替烧结粘土砖的一种新型墙体材料 ,在我国一些地区得到了大规模的推广使用。但实践证明 :混凝土小型空心砌块砌体房屋在使用中很容易在房屋的顶层墙体产生温度应力引起的裂缝。对砌块砌体房屋温度裂缝的成因进行了分析 ,进而提出了用预压应力来控制砌块砌体结构温度裂缝的新技术。试验研究证明 :该技术能有效提高墙体的抗裂性能、抗剪强度。最后提出了有关预应力砌块砌体的设计。Small-sized concrete hollow block is a new-style material which was widely applied in dwelling house in our country.But the practice bears out that concrete hollow block masonry building is easy to crack on the top wall because of temperature stress.The cause of temperature cracks of block masonry structure was analyzed.Furthermore,an effective technique,by which a prestress can be used to control the temperature cracks of the block masonry wall,was presented.Experimental study indicates that this technique can effectively improve crack-resistance behavior and shear capacity of the wall.The design and construction suggestions and detailing measures of prestressed masonry structure were also proposed.

关 键 词：砌块砌体 温度裂缝 砌体房屋 混凝土小型空心砌块 预压应力 顶层墙体 细部构造 施工 抗裂性能 温度应力 

分 类 号：TU364[建筑科学—结构工程]