發(fā)布時(shí)間：2018-01-29 16:13

  本文關(guān)鍵詞： 高速公路 道路安全 護(hù)欄 防撞能力　出處：《河北工業(yè)大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：高速公路改擴(kuò)建,原道路護(hù)欄難以達(dá)到《公路交通安全設(shè)施設(shè)計(jì)規(guī)范》(JTG/T D8-2006,簡(jiǎn)稱(chēng)新規(guī)范)對(duì)護(hù)欄強(qiáng)度的要求,但整體上舊路護(hù)欄外觀(guān)完好,仍具有很高的防撞能力,如果將舊護(hù)欄廢棄,會(huì)造成嚴(yán)重的資源浪費(fèi)。本文針對(duì)舊波形梁護(hù)欄提出了升級(jí)改造方案,以提高舊護(hù)欄強(qiáng)度,針對(duì)常規(guī)移動(dòng)式混凝土活動(dòng)護(hù)欄靈活性和防撞能力不能兼顧問(wèn)題,設(shè)計(jì)了新型混凝土活動(dòng)護(hù)欄。在新規(guī)范要求的碰撞條件下,本文采用車(chē)輛與護(hù)欄碰撞的雙自由度模型計(jì)算碰撞力,并考慮護(hù)欄立柱主要承受彎矩作用,計(jì)算了立柱最大彎矩的取值與作用位置。在此基礎(chǔ)上,根據(jù)新、舊規(guī)范中護(hù)欄幾何形式的差異,提出了舊護(hù)欄的加固改造方案。(1)在舊護(hù)欄立柱上加橫隔梁,用以彌補(bǔ)波形梁板厚度的不足,并對(duì)橫隔梁的設(shè)置形式進(jìn)行了設(shè)計(jì);(2)通過(guò)在舊護(hù)欄立柱底部鉆孔下探并澆筑混凝土,從而解決護(hù)欄埋深不足問(wèn)題,使其抗拔能力達(dá)到新規(guī)范立柱抗拔性能的要求;(3)在舊立柱中澆筑自密實(shí)混凝土,并配置鋼筋,用以彌補(bǔ)舊立柱孔徑小及腐蝕導(dǎo)致的強(qiáng)度不足問(wèn)題。本文還設(shè)計(jì)了一種新型混凝土活動(dòng)護(hù)欄,通過(guò)在混凝土中埋設(shè)升降裝置,并在裝置底部增加腳輪,從而在充分利用混凝土護(hù)欄防撞能力強(qiáng)的特點(diǎn)下,實(shí)現(xiàn)了開(kāi)放時(shí)的快速、靈活地移動(dòng),參照新規(guī)范碰撞要求,對(duì)混凝土活動(dòng)護(hù)欄的截面形式、配筋、活動(dòng)裝置進(jìn)行了設(shè)計(jì)。最后,本文利用仿真軟件對(duì)改造后的波形梁護(hù)欄和混凝土活動(dòng)護(hù)欄進(jìn)行了仿真試驗(yàn)。在相同的碰撞條件下,升級(jí)改造后的護(hù)欄能夠有效攔阻失控車(chē)輛,車(chē)輛未發(fā)生騎跨、穿越和橫轉(zhuǎn)現(xiàn)象,車(chē)輛加速度、波形梁最大位移均能滿(mǎn)足新規(guī)范的要求,防撞性能甚至優(yōu)于新規(guī)范護(hù)欄�；炷粱顒�(dòng)護(hù)欄防撞能力也達(dá)到了新規(guī)范規(guī)定值,碰撞過(guò)程中車(chē)輛的加速度等條件均能滿(mǎn)足規(guī)范要求。
[Abstract]:Highway reconstruction and extension, the original road guardrail is difficult to meet the "Road Traffic Safety facilities Design Code", JTG / T D8-2006, referred to as the new code) for the strength of the guardrail. But on the whole the old road guardrail looks intact and still has a high ability of collision prevention. If the old guardrail is abandoned it will cause serious waste of resources. This paper proposes an upgrade scheme for the old corrugated beam guardrail. In order to improve the strength of the old guardrail and to solve the problem that the flexibility and anti-collision ability of the conventional movable concrete guardrail can not be taken into account, a new type of concrete movable guardrail is designed under the condition of collision required by the new specification. In this paper, the collision force is calculated by using the two-degree-of-freedom model of vehicle and guardrail collision, and the maximum moment of column is calculated and the position of action is calculated by taking into account the moment action of column column. On this basis, according to the new method. In order to make up for the shortage of the thickness of the corrugated beam, this paper puts forward the retrofit scheme of the old guardrail, which is the difference of the geometric form of the guardrail, and puts forward the method of strengthening and reforming the old guardrail column by adding the transverse beam to the column of the old guardrail. The setting form of the diaphragm beam is also designed. (2) by drilling and pouring concrete at the bottom of the old guardrail column, the problem of insufficient burying depth of the guardrail can be solved, and the pullout resistance of the column can meet the requirements of the new code. (3) pouring self-compacting concrete into old columns and installing steel bars to make up for the insufficient strength caused by the small aperture and corrosion of the old columns. A new type of concrete movable guardrail is also designed in this paper. By installing lifting device in concrete and adding casters to the bottom of the device, the rapid and flexible movement of the concrete guardrail can be realized under the characteristics of strong anti-collision ability of concrete guardrail. According to the impact requirements of the new code, the section form, reinforcement and movable device of the concrete movable guardrail are designed. In this paper, simulation tests of corrugated beam guardrail and concrete movable guardrail are carried out by using simulation software. Under the same impact conditions, the upgraded guardrail can effectively block out of control vehicle. The phenomena of vehicle riding, crossing and crossing, vehicle acceleration and maximum displacement of the waveform beam can meet the requirements of the new code. The anti-collision capability of the concrete movable guardrail is even better than that of the new code, and the anti-collision capability of the concrete movable guardrail also reaches the specified value of the new code, and the acceleration of the vehicle during the collision process can meet the requirements of the specification.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U417.12

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 閆書(shū)明;白書(shū)鋒;于海霞;;中央分隔帶護(hù)欄開(kāi)口處事故分析與解決方案[J];公路;2010年01期

2 石紅星,白書(shū)鋒,呂偉民;車(chē)與混凝土護(hù)欄碰撞的沖擊力簡(jiǎn)化模型[J];公路交通科技;2002年02期

3 陳玲;;改、擴(kuò)建高速公路波形梁鋼護(hù)欄改造方案研究[J];黑龍江交通科技;2009年07期

相關(guān)碩士學(xué)位論文 前1條

1 謝玉洪;高度自適應(yīng)半剛性護(hù)欄的研究[D];長(zhǎng)沙理工大學(xué);2004年

，

本文編號(hào)：1473808