884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(中國(guó)建筑西南設(shè)計(jì)研究院有限公司, 成都 610042)

摘要: 通過(guò) 11 塊密拼疊合板試件的單向擬靜力試驗(yàn),對(duì)接縫處的平面內(nèi)直剪承載力進(jìn)行了研究;同時(shí)使用分層殼單元,對(duì)密拼疊合板水平荷載作用下的平面內(nèi)直剪承載力、豎向荷載作用下的導(dǎo)荷方式等進(jìn)行了數(shù)值分析。 結(jié)果表明:密拼疊合板平面內(nèi)直剪承載力隨后澆層厚度、接縫處連接鋼筋配筋率的增大而增大;豎向荷載作用下,密拼疊合板在彈性階段,豎向?qū)Ш煽傻韧诂F(xiàn)澆板,但承載力計(jì)算時(shí)跨中和支座彎矩需進(jìn)行調(diào)整;長(zhǎng)期荷載作用下其撓度可取現(xiàn)澆板撓度值乘以不小于 1. 1 的增大系數(shù)。 最后,將研究成果應(yīng)用于密拼疊合板的設(shè)計(jì)實(shí)踐中。

關(guān)鍵詞: 疊合板; 密拼整體式接縫; 接縫傳力機(jī)理; 平面內(nèi)直剪承載力; 擬靜力試驗(yàn)

中圖分類號(hào):TU375. 2 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)13-0007-08

DOI:10. 19701 / j. jzjg. XNY2028

Research and engineering application on direct shear performance at the joint of composite slab connected without gaps DENG Shibin, DONG Bo, BI Qiong,

WEI Bochen, LEI Yu, WU Jing, XU Mingjiao

(China Southwest Architectural Design and Research Institute Co. , Ltd. , Chengdu 610042, China)

Abstract:Through the one-way pseudo-static test of 11 composite slabs connected without gaps specimens, the in-plane direct shear bearing capacity of the joints was studied. At the same time, the layered shell element was used to carry out numerical analysis of the in-plane direct shear bearing capacity of composite slab connected without gaps under horizontal load and the way of guiding the load under vertical load. The results show that the direct shear bearing capacity in the plane of the composite slab connected without gaps increases after the thickness of the pouring layer and the reinforcement ratio of the connecting steel bar at the joint increase; under the action of vertical load, the composite slab connected without gaps is in the elastic stage, and the vertical guided load can be equivalent to cast-in-place slab, but the bending moments of the mid-span and the support need to be adjusted when the bearing capacity is calculated; under long-term load, its deflection can be taken as the deflection of the cast-in-place slab multiplied by an increase factor not less than 1. 1. Finally, the research results are applied to the design practice of composite slab connected without gaps.

Keywords:composite slab; monolithic joint connected without gaps; mechanism of joint force transfer; in-plane directnshear bearing capacity; pseudo-static test