集束群钉式装配组合梁界面滑移计算

doi:10.13229/j.cnki.jdxbgxb.20211225

摘要/Abstract

摘要：

针对由预留后浇孔的预制板和集束布置剪力钉的钢梁组成的装配式钢-混组合梁，研究了其非连续界面剪力连接下的装配组合梁界面滑移计算理论。基于梁变形理论，将间断剪力连接的装配组合梁分为有剪力连接区和无剪力连接区，并分别建立了界面滑移微分方程；基于位移连续和变形协调条件，建立了间断剪力连接组合梁界面滑移分布表达式，求解出集中荷载和均布荷载作用下的界面滑移分布解析表达式；经与现有连续剪力连接的组合梁滑移分布方程以及装配组合梁试验实测数据进行对比，验证了该组合梁滑移分布算法的正确性。采用该算法开展了混凝土板与钢梁的高度比、抗剪连接度和集束度（反映键群集束程度的指标，定义为单个（排）预留孔中剪力键数量与全梁剪力键数量的比值）对装配式组合梁滑移和变形的参数影响分析，结果表明：界面滑移随抗剪连接度的增大而减小，随高度比和集束度的增大而增大；集束度越大，滑移分布越不均匀，在无剪力连接区出现峰值。

关键词: 结构工程, 钢混组合梁, 界面滑移, 解析法, 装配式, 集束钉群

Abstract:

For fabricated steel-concrete composite beams composed of concrete slabs with reserved post-pouring holes and steel beam with arranged discrete shear connectors， the interface slip distribution theory of fabricated steel-concrete composite beam with discrete interface shear connection is studied. Based on the beam deformation theory， fabricated composite beams with discrete shear connection are divided into shear connection area and non-shear connection area and the interface slip differential equations are established respectively based the displacement continuity and deformation coordination conditions. The interface slip distribution expression of intermittent shear connection composite beam are formulated， and the analytical expression of interface slip distribution under concentrated load and uniform load are solved. Through comparing with the existing slip distribution equation of continuous shear connection composite beam and the measured data of fabricated composite beam test， the slip distribution algorithm is verified. The influence of various parameters on slip and deformation of fabricated composite beams is analized with the parameters as the height ratio of concrete slab to steel beam， the shear connection degree and the clustering degree （an index reflecting the degree of bond clustering， defined as the ratio of the number of shear connectors in a （row） reserved hole to the number of shear connectors in the beam）. The results show that the interface slip decreases with the increase of the shear connection degree， and increases with the increase of the height ratio and the clustering degree； the larger the clustering degree， the more uneven slip distribution， and peak value appears in the non-shear connection area.

Key words: structure engineering, steel-concrete composite beam, interface slip, analytical algorithm, fabricate, clustering studs

中图分类号:

TU398

范亮,徐英铭,谭阳. 集束群钉式装配组合梁界面滑移计算[J]. 吉林大学学报(工学版), 2023, 53(9): 2533-2541.

Liang FAN,Ying-ming XU,Yang TAN. Interface slip calculation of prefabricated steel⁃concrete composite beams with clustering studs[J]. Journal of Jilin University(Engineering and Technology Edition), 2023, 53(9): 2533-2541.

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序号	混凝土板厚度/mm	钢梁高度/mm	高度比
1	50	2238	0.022
2	150	2238	0.067
3	250	2238	0.112
4	350	2238	0.156
5	400	2238	0.179
6	500	2238	0.223

序号	预留孔数量	单孔剪力键数量	剪力键总数	集束度
1	20	24	480	0.050
2	12	40	480	0.083
3	8	60	480	0.125
4	5	96	480	0.200
5	3	160	480	0.333