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 廣東舍衛(wèi)工程技術(shù)咨詢有限公司， 廣州 510075; 2 華陽(yáng)國(guó)際工程設(shè)計(jì)股份有限公司， 廣州 510640;  3 九江市城市規(guī)劃市政設(shè)計(jì)院， 九江 332000）

［摘要］在臺(tái)風(fēng)作用下，大跨度屋蓋會(huì)產(chǎn)生較大吸力，同時(shí)支承柱也承受著風(fēng)荷載水平推力，出現(xiàn)拉彎受力狀況。此時(shí)柱子會(huì)出現(xiàn)裂縫，剛度降低，水平位移增大，對(duì)于懸臂柱Ｐ-Ｄ效應(yīng)更加明顯，恢復(fù)性能變差。針對(duì)以上現(xiàn)象，以珠海航展中心主展館為例，提出一種后張有粘結(jié)預(yù)應(yīng)力混凝土柱，采用有限元軟件分析其在拉彎荷載下的力學(xué)性能，考慮了軸拉比、混凝土強(qiáng)度、配筋率以及預(yù)應(yīng)力鋼絞線與普通鋼筋比值等因素。分析結(jié)果表明，試件抗拉彎承載力隨著軸拉比的增大而降低；混凝土強(qiáng)度越高，配筋率越大，承載力則越高；當(dāng)預(yù)應(yīng)力度不大于0.2時(shí)，有較好的耗能性能。

［關(guān)鍵詞］珠海航展中心； 預(yù)應(yīng)力混凝土柱；抗拉彎性能；大跨屋蓋

中圖分類號(hào)：TU395+.9文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)04-0065-06

Analysis of tensile and bending behavior of prestressed concrete column of Zhuhai Airshow Center Main Exhibition Hall project

WEI Lu1, LIU Xiang2, YE Haideng3

（1 Guangdong Shewei Engineering Consulting Co., Ltd., Guangzhou 510075, China; 2 CAPOL International & Associates Group, Guangzhou 510640, China; 3 Jiujiang Urban Planning & Municipal Design Institute, Jiujiang 332000, China）

Abstract:Under the action of typhoon, the large-span roof will generate a large suction force, and at the same time, the supporting column will also bear the horizontal thrust of the wind load, and the tension and bending force will appear. At this time, the column will appear cracks, the rigidity will decrease, and the horizontal displacement will increase. The P-D effect for the cantilever column is more obvious, and the recovery performance becomes worse. Aiming at the above phenomena,taking the Zhuhai Airshow Center Main Exhibition Hall as an example, a post-tensioned bonded prestressed concrete column was proposed. The mechanical performance of the column under the tension and bending load were analyzed by finite element software, considering the axial-tension ratio, concrete strength, reinforcement ratio and the ratio of prestressed steel strand to ordinary steel and other factors. The analysis results show that the tension and bending capacity of the specimen decreases with the increase of the axial-tension ratio; the higher the concrete strength, the greater the reinforcement ratio, and the higher the bearing capacity. When the degree of the prestressing is not more than 0.2, it has better energy consumption performance.

Keywords:Zhuhai Airshow Center; prestressed concrete column;tensile and bending behavior;large-span roof

作者簡(jiǎn)介：魏路，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：mrweilu@qq.com；通信作者：劉翔，碩士，高級(jí)工程師，Email：forest_moon@126.com。