两种新型超前止水沉降后浇带性能的对比

发布时间：2019-01-12 12:13

【摘要】：目的分析两种新型超前止水沉降后浇带性能,找出影响差异沉降的主要因素.方法利用有限元软件ABAQUS建立分析模型,从后浇带两侧柱间间距、基底反力系数、底板厚度、伸出翼缘宽度、混凝土等级、筏板伸出宽度等影响因素分析两种超前止水沉降后浇带对控制差异荷载引起的差异沉降的效果.结果超前止水沉降后浇带的差异沉降并不随沉降后浇带两侧柱间间距的增加而简单变化;基底反力系数对差异沉降影响较大,但基底反力系数不易确定;伸出翼缘宽度与筏板伸出宽度的增加会减小超前止水沉降后浇带两侧差异沉降;混凝土等级对超前止水沉降后浇带两侧差异沉降的影响可忽略不计;对于设置在裙房一侧距主楼边柱的第一跨内的沉降后浇带底板厚度的增加反而会增加后浇带两侧的差异沉降.结论虽然第二种超前止水沉降后浇带利用止水钢板取代了第一种的橡胶止水带,相比第一种超前止水沉降后浇带在控制差异沉降性能改善很多,但仍有混凝土损伤过大开裂等问题存在,仍需改进.
[Abstract]:Objective to analyze the properties of two new types of post-pouring zone for water stop settlement and find out the main factors affecting the differential settlement. Methods the finite element software ABAQUS was used to establish the analysis model, which was based on the space between columns, the reaction coefficient of the base, the thickness of the bottom plate, the width of the flange, the grade of concrete. The influence factors such as raft extension width and so on are analyzed. The effect of two kinds of post-pouring belt on controlling differential settlement caused by differential load is analyzed. Results the differential settlement of the post-pouring zone did not change with the increase of the distance between the columns of the two sides of the post-pouring zone, and the coefficient of the basement reaction had a great influence on the differential settlement, but the coefficient of the base reaction was not easy to determine. The increase of the flange width and the raft extension width will reduce the difference settlement between the two sides of the post-pouring zone, and the influence of concrete grade on the differential settlement on the two sides of the post-pouring zone can be neglected. The increase of the thickness of the bottom plate in the first span between the side of the skirt and the side column of the main building will increase the differential settlement of the two sides of the post-pouring zone. Conclusion although the second type of post-pouring zone replaces the first type of rubber belt, compared with the first one, the performance of controlling differential settlement is much better than that of the first one. However, there are still some problems such as excessive damage and cracking of concrete, which need to be improved.
【作者单位】：沈阳建筑大学土木工程学院;沈阳建筑大学文法学院;
【基金】：国家自然科学基金项目(51178276)
【分类号】：TU755

【共引文献】