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

(1 上海市建筑科學(xué)研究院有限公司 上海市工程結(jié)構(gòu)安全重點(diǎn)實(shí)驗(yàn)室， 上海 200032；2 上海理工大學(xué)環(huán)境與建筑學(xué)院， 上海 200093； 3 東南大學(xué)建筑設(shè)計(jì)研究院有限公司， 南京 210096)

［摘要］通過(guò)五個(gè)榫卯原木節(jié)點(diǎn)耐火極限試驗(yàn)，對(duì)透榫和單向直榫木節(jié)點(diǎn)的升溫規(guī)律和耐火極限等進(jìn)行了研究，主要考慮了節(jié)點(diǎn)類(lèi)型和荷載比兩個(gè)參數(shù)對(duì)其耐火極限的影響。結(jié)果表明：常溫下單向直榫節(jié)點(diǎn)試件的承載力比透榫節(jié)點(diǎn)試件的承載力高；各測(cè)點(diǎn)溫度隨著受火時(shí)間的增加而升高，且?；鹬鬁囟认陆递^慢；測(cè)點(diǎn)離木截面表面距離越近，溫度越高；相同類(lèi)型的榫卯節(jié)點(diǎn)，隨著荷載比的增加耐火極限減??；相同荷載比時(shí)，單向直榫節(jié)點(diǎn)耐火極限比透榫節(jié)點(diǎn)稍高。

［關(guān)鍵詞］木建筑；單向直榫節(jié)點(diǎn)；透榫節(jié)點(diǎn)；耐火極限；荷載比

中圖分類(lèi)號(hào)：TU366-2，TU352-5文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)09-0098-05

Experimental study on fire endurance of one-way straight and through mortise-tenon timber joints

CHEN Lingzhu1, WANG Xin2, HAN Chongqing3, XU Qingfeng1, HU Xiaofeng3, WANG Zhengchang3

(1 Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Sciences Co., Ltd., Shanghai 200032, China; 2 School of Environment and Architecture, Uninversity of Shanghai Science and Technology, Shanghai 200093, China; 3 Architects & Engineers Co., Ltd., Southeast University, Nanjing 210096, China)

Abstract:The temperature development law and fire endurance of one-way straight and through mortise-tenon timber joints were experimentally studied through fire endurance tests on five mortise-tenon timber joints, the effects of joint type and load ratio on their fire endurance were considered. Results show that the capacity of one-way straight mortise-tenon joint is higher than through mortise-tenon joints. Temperature increases with fire exposure time increasing and decreases very slowly after the fire stopped. The closer the measuring point to the surface of timber section is, the higher their temperature is. For the mortise-tenon joints of the same type, the fire endurance decreases with load ratios increase. For the mortise-tenon joints subjected to the same load ratios, the fire endurance of one-way straight mortise-tenon joint is slightly higher than through mortise-tenon joints. 

Keywords:timber building; one-way straight mortise-tenon joint; through mortise-tenon joint; fire endurance; load ratio

*國(guó)家自然科學(xué)基金青年科學(xué)基金（51808339），上海市工程結(jié)構(gòu)安全重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題（2013-KF04）。

通信作者：許清風(fēng)，博士，教授級(jí)高級(jí)工程師，Email: xuqingfeng73@163.com。