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(1 廣東省建筑設(shè)計(jì)研究院有限公司, 廣州 510010;2 華南理工大學(xué)土木與交通學(xué)院, 廣州 510641)

摘要: 新疆哈密市民服務(wù)中心采用一種多拱聯(lián)合受力結(jié)構(gòu)體系,該結(jié)構(gòu)體系由主拱、次拱、水平臥拱、水平桁架、腰桁架及預(yù)應(yīng)力拉梁等組成,其中主拱部分采用非對(duì)稱拱結(jié)構(gòu). 通過 MIDAS Gen 軟件分別對(duì)單主拱、帶腰桁架的單主拱、帶次拱的雙主拱、帶次拱及腰桁架的雙主拱進(jìn)行穩(wěn)定性分析對(duì)比,并對(duì)三種側(cè)翼抗側(cè)力方案進(jìn)行力學(xué)性能及經(jīng)濟(jì)性分析對(duì)比,以及對(duì)臥拱剛度與結(jié)構(gòu)側(cè)向剛度的關(guān)系進(jìn)行研究,同時(shí)進(jìn)行了整體分析和吊桿作用分析. 結(jié)果表明,采用多拱聯(lián)合受力結(jié)構(gòu)體系有利于提高結(jié)構(gòu)的承載力、穩(wěn)定性以及受力的合理性,在一定程度上實(shí)現(xiàn)了結(jié)構(gòu)自平衡、自穩(wěn)定;在主拱左右兩側(cè)采用不同截面的桁架桿件及在軸力較大的拱腳處設(shè)置鋼管混凝土弦桿的措施可有效提高主拱的安全性和經(jīng)濟(jì)性;水平臥拱可有效抵抗大跨度斜面結(jié)構(gòu)的支座推力、水平風(fēng)壓力和溫度應(yīng)力;吊桿的設(shè)置對(duì)減小腰桁架的豎向位移和桿件內(nèi)力有顯著作用,并可為腰桁架提供桿件截面優(yōu)化的空間;在設(shè)計(jì)中需考慮溫度影響.

關(guān)鍵詞: 拱; 多拱聯(lián)合受力結(jié)構(gòu)體系; 水平臥拱; 穩(wěn)定性分析; 抗側(cè)力; 經(jīng)濟(jì)性

中圖分類號(hào):TU393. 3 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)21-0127-07

DOI:10.19701 / j.jzjg.GDAD2218

Study and application of multi-arch combined stress structural system

SU Hengqiang1, OUYANG Qiu1, LI Yuying1, HE Jun1, HE An2

(1 Guangdong Architectural Design & Research Institute Co. , Ltd., Guangzhou 510010, China;2 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China)

Abstract: The Citizen Service Center of Hami City located in Xinjiang Province adopts a multi-arch combined stressstructural system, which is composed of main arch, secondary arch, horizontal arch, horizontal truss, waist truss, andprestressed tensile beam, among which the main arch adopts asymmetric arch structure. Through using MIDAS Gensoftware, the stability analysis was compared individually of single main arch, single main arch with waist truss, doublemain arch with secondary arch, double main arch with secondary arch and with waist truss. They were analyzed andcompared the mechanical properties and economical efficiency of three kinds of side force resistance schemes. Therelationship between the horizontal arch stiffness and the lateral stiffness of the structure were also studied. Besides, theanalysis of the whole structure and the the function of suspenders were carried out at same time. The results show thatadopting the multi-arch combined stressed structure system is beneficial to improve the bearing capacity, stability andstress-bearing rationality of the structure; and to certain extent, realizes the self-balance and self-stability of the structure.It is also evidently showed that safety and economical efficiency of the main arch can be effectively improved by using trussmembers of different sections on the left and right sides of the main arch and setting concrete filled steel tube chord membersat the foot of the arch with larger axial force. Horizontal arch can effectively resist horizontal thrust of bearings, horizontalwind pressure and temperature stress of large-span inclined plane structure. The installation of suspender plays a significantrole in reducing the vertical displacement and member internal force of the waist truss and provides space for waist truss thatoptimizing the member sections. The influence of temperature on the structure shall be considered in the design.

Keywords: arch; multi-arch combined stress structural system; horizontal arch; stability analysis; lateral resistance;economical efficiency

∗廣州市基礎(chǔ)與應(yīng)用基礎(chǔ)研究項(xiàng)目(202201010590).

第一作者:蘇恒強(qiáng),碩士,廣東省工程勘察設(shè)計(jì)大師,教授級(jí)高級(jí)工程師,主要從事工程抗震研究,Email:shq@ gdadri. com.

[引用本文] 蘇恒強(qiáng),歐陽秋,李雨盈,等. 多拱聯(lián)合受力結(jié)構(gòu)體系的研究與應(yīng)用[ J]. 建筑結(jié)構(gòu),2022,52(21):127-133. SU Hengqiang,OUYANG Qiu,LI Yuying, et al. Study and application of multi-arch combined stress structuralsystem[J]. Building Structure,2022,52(21):127-133.