大跨度預(yù)應(yīng)力加強(qiáng)型鋼拱的性能研究
王秀麗，陳志祥
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(蘭州理工大學(xué)土木工程學(xué)院，730050)［提要］預(yù)應(yīng)力加強(qiáng)型鋼拱是指根據(jù)大跨度鋼拱承受豎向荷載時的內(nèi)力及變形分布,在鋼拱軸線平面內(nèi)增加適當(dāng)?shù)膿螚U和預(yù)應(yīng)力索,以改善其受力性能、提高剛度和承載力的新型結(jié)構(gòu)體系。運用有限元軟件ANSYS，分析了預(yù)應(yīng)力加強(qiáng)型鋼拱在不同豎向荷載作用下以及施加不同初始預(yù)應(yīng)力時應(yīng)力和位移的變化規(guī)律,同時與普通大跨度鋼拱進(jìn)行了對比,結(jié)果顯示預(yù)應(yīng)力加強(qiáng)型鋼拱具有很大的優(yōu)越性,剛度和承載力都有很大的提高。［關(guān)鍵詞］加強(qiáng)型鋼拱；預(yù)應(yīng)力；剛度；承載力Property of Large Span Prestress Reinforced Steel Arch Beam/Wang Xiuli, Chen Zhixiang (School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050,China)Abstract:A new type structure that called prestress reinforced steel arch beam is introduced where proper stay bars and prestress cables are arranged along the axis of the steel arch beam according to the variation of the bending moment diagram of the steel arch beam subjected to the uniformly distributed vertical load. The finite element analysis software ANSYS has been used to analyze the variation law of stress and deformation under vertical loads or prestress. The comparison for analysis models of commonly steel arch beam and prestress reinforced steel arch beam has been carried out, and the results show that the prestress reinforced steel arch beam has great superiority and its stiffness and load capacity increased greatly.Keywords:reinforced steel arch beam; prestress; stiffness; load capacity*國家自然科學(xué)基金資助項目(50338010)；蘭州理工大學(xué)優(yōu)秀青年教師資助計劃項目。
