小间距钢梁混凝土空心楼盖变形试验及机理分析

发布时间：2018-06-04 03:50

本文选题：盒式结构 + 小间距钢梁　；参考：《湖南科技大学》2016年硕士论文

【摘要】：为扩大“盒式结构”的应用范围,结合钢-混组合楼盖和现浇混凝土空心楼盖的特点,提出一种小间距钢梁混凝土空心楼盖,既能降低建筑层高,又能符合“盒式结构”楼盖受力的结构特点。小间距钢梁混凝土空心楼盖是为适用马克俭院士研发的盒式钢结构应用于住宅中的一种新型楼盖,其结构特点主要体现在梁的间距较小,间距为2m,梁采用H型钢梁。具有现浇楼盖竖向刚度和承载力高的特点,也具有钢-混组合楼盖和“盒式钢结构”抗震性能优越的特点。因此该结构的研究针对混凝土空心板对提高钢结构楼盖刚度的试验和变形机理进行研究,此项研究具有一定的理论价值和经济意义。本文通过原结构1/2缩尺模型试验和数值分析,研究了小间距钢梁现浇混凝土空心楼盖钢梁与混凝土板弹性阶段协同工作机理和变形,提出了小间距钢梁现浇混凝土空心楼盖的变形计算方法,对此类楼盖的变形计算具有一定的工程意义和经济效益。本文主要从以下几个方面展开了工作:(1)设计、加工及制作了原结构1/2缩尺小间距钢结构楼盖,对无板钢结构楼盖进行竖向加载试验,当该阶段试验结束后,在无板钢结构楼盖上浇捣混凝土空心板,并进行常规养护,达到龄期后,对其进行竖向加载试验;(2)通过对无板钢结构楼盖以及浇捣混凝土空心板的有板钢混楼盖的竖向加载试验,以及实验现象、数据分析,研究混凝土空心板对钢梁楼盖刚度的影响,并且确定了其影响系数η;(3)通过试验获得的钢梁和混凝土空心板变形特征和应变实测值,得出了钢梁跨中截面的应变沿高度的分布特征,以及混凝土空心板垂直梁轴方向的应变分布特征;(4)根据试验理论分析和试验研究,提出小间距钢梁混凝土空心楼盖变形机理和挠度计算方法,以及刚度的计算公式;(5)利用有限元软件ANSYS(14.0)分别对原结构1/2缩尺试验结构模型的无板钢结构楼盖和有板钢混楼盖进行了模拟,并与试验结果进行对比。
[Abstract]:In order to expand the application scope of "box structure", combined with the characteristics of steel-concrete composite floor and cast-in-place concrete hollow floor, a kind of small spacing steel beam concrete hollow floor is put forward, which can reduce the height of building floor. It can also accord with the structural characteristics of the "box structure" floor. The small spacing steel beam concrete hollow floor is a new type of steel box structure developed for the application of Mark Jian academician in the residence. Its structural characteristics are mainly reflected in the small spacing of the beam, the spacing is 2 m, and the beam is H type steel beam. It has the characteristics of high vertical stiffness and bearing capacity of cast-in-place floor, excellent seismic performance of steel-concrete composite floor and "box steel structure". Therefore, the research of this structure aims at the experiment and deformation mechanism of concrete hollow slabs to improve the floor stiffness of steel structure, which has certain theoretical value and economic significance. Based on the 1 / 2 scale model test and numerical analysis of the original structure, this paper studies the cooperative working mechanism and deformation of the steel beam and concrete slab in the elastic stage of cast-in-place concrete hollow floor with small spacing steel beams. The deformation calculation method of cast-in-place concrete hollow floor with small spacing steel beam is put forward, which has certain engineering significance and economic benefit for the deformation calculation of this kind of floor. In this paper, we have designed and manufactured the original steel structure floor with 1 / 2 scale and small pitch from the following aspects: 1: 1). The vertical loading test is carried out on the non-slab steel structure floor, and when the stage test is finished, Pouring concrete hollow slabs on the floor of unslabs steel structure, and carrying out routine maintenance, after reaching the age, Through the vertical loading test of steel structure floor without slab and steel concrete hollow slab, and the experimental phenomenon and data analysis, the influence of concrete hollow slab on the stiffness of steel beam floor is studied. The deformation characteristics of steel beam and concrete hollow slab obtained by experiments and the measured strain values are determined, and the distribution characteristics of the strain along the height of the mid-span section of the steel beam are obtained. And the strain distribution characteristics of concrete hollow slab vertical beam axis. According to the experimental theoretical analysis and experimental study, the deformation mechanism and deflection calculation method of small spacing steel beam hollow floor are put forward. Using finite element software ANSYS 14.0), the unslabs steel structure floor and the slab steel concrete floor of the original structure 1 / 2 scale test structure model are simulated, and the results are compared with the test results.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU398.9

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