摘要
现代建筑结构中有许多辅助设施 ,目前这些辅助设施的管道一般都从梁下交错穿过 ,这样 ,势必增加了层高 ,尤其对高层建筑来讲 ,就大大增加了建筑物的总高度和自重 为了解决这个问题就出现了开孔梁 ,让管道从孔中穿过 目前对混凝土开孔梁的研究 ,主要集中在强度方面 ,对使用性能如裂缝的研究涉及较少 笔者通过对十根混凝土开孔梁的对比试验分析 ,对开孔梁抗裂特点及裂缝开展的规律进行了定性分析及定量研究 ,并建议采用名义拉应力法计算开孔梁裂缝宽度 ,计算结果表明 ,本文所示方法简便、适用 。
There are many subsidiary installations in modern buildings. At present, the pipeline for the subsidiary installations usually passes crisscross under the beam. So inevitably it will increase the height of each storey ,and in the end,the height and the dead weight of the whole building,exp.those of high rise buildings.To solve the problem, beams with large openings are used instead so that the pipeline passes through the openings. At present,researches on concrete beams with large openings are mainly focused on the aspect of strength,but rarely touch such aspects as crackings.The paper gives a qualitative and quantitative study of the regularities in cracking and the anti-cracking behaviors of beams with large openings through a contrast test with ten concrete beams with large openings. It is suggested that the width of cracking be calculated by the method of nominal tension stress.The calculating results show that the above mentioned approach is simple and widely applicable in construction designs.
出处
《江苏理工大学学报（自然科学版）》
2000年第2期77-82,共6页
Journal of Jiangsu University of Science and Technology(Natural Science)
基金
国家自然科学基金资助项目 !( 5 99780 0 8)
