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（內(nèi)蒙古科技大學(xué)土木工程學(xué)院， 包頭 014010）

［摘要］目前疊合雙向板在拼縫處的構(gòu)造措施存在傳力不理想、施工不便等不足，而L形拼縫疊合雙向板從設(shè)計(jì)原理上分析具有傳力理想、施工方便的優(yōu)點(diǎn)。基于此，對(duì)L形拼縫疊合雙向板、附加鋼筋式疊合雙向板和現(xiàn)澆雙向板進(jìn)行了靜力加載試驗(yàn)。分析試驗(yàn)板的撓度、鋼筋應(yīng)變、裂縫開(kāi)展隨荷載的變化以及L形拼縫疊合雙向板拼縫處的傳力情況。試驗(yàn)結(jié)果表明：L形拼縫疊合雙向板和現(xiàn)澆雙向板的裂縫開(kāi)展以及最終破壞形態(tài)相似，其受力性能可以認(rèn)為“等同現(xiàn)澆”；L形拼縫疊合雙向板的開(kāi)裂荷載和極限荷載高于附加鋼筋式疊合雙向板，受力性能優(yōu)于附加鋼筋式疊合雙向板。

［關(guān)鍵詞］L形拼縫； 疊合雙向板； 靜力加載試驗(yàn)； 受力性能

中圖分類(lèi)號(hào)：TU317文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)02-0067-05

Experimental study of mechanical properties of L-shaped joint laminated two-way slabs

Li Juan， Ni Dongyang， Liu Xiang， Zhang Junrui

（Inner Mongolia University of Science and Technology， Baotou 014010， China）

Abstract:At present, the structural measures of laminated two-way slab at the joint are not ideal in force transmission and inconvenient in construction, while the L-shaped laminated joint two-way slab has the advantages of ideal force transmission and convenient in construction according to the design principle. Based on this, the static loading tests of L-shaped joint laminated two-way slab, additional reinforced laminated two-way slab and cast-in-place two-way slab were carried out. The deflection, reinforcement strain and crack development of the test slab with the change of load were analyzed, as well as the force transmission at the joint of L-shaped joint laminated two-way slab. The experimental results show that the crack development and ultimate failure mode of L-shaped joint laminated two-way slab and cast-in-place two-way slab are similar, and its mechanical performance can be considered as "equivalent to cast-in-place"; the cracking load and ultimate load of L-shaped joint laminated two-way slab are higher than that of additional reinforced laminated two-way slab, and its mechanical performance is better than that of additional reinforced laminated two-way slab.

Keywords:L-shaped joint; laminated two-way slab; static loading test; mechanical property

*國(guó)家自然科學(xué)基金項(xiàng)目（51368042）。

作者簡(jiǎn)介：李娟，碩士，講師，Email：nidongyang123@126.com。