CAJ | 학술논문

以某城区高架桥为例，设计出一种城市桥梁新型桥侧混凝土护栏的最优结构，并采用有限元仿真与碰撞试验相结合的方法对其进行安全防护性能分析。结果表明，新型桥侧混凝土护栏结构能够有效地防护行驶车辆，其中小客车碰撞后，其驶出角度为7°，大客车碰撞后，其驶出角度为1．7°；小客车碰撞后，其重心加速度最大值为17．4g ，大客车碰撞后，护栏的最大动态变形小于100mm ；混凝土坡面是影响小客车缓冲保护性能的主要因素，混凝土墙体强度是影响大客车防撞性能的主要因素。新型桥侧混凝土护栏的各项指标均满足评价标准，其防撞等级达到SS级，且成功应用于依托工程。
이모성구고가교위례，설계출일충성시교량신형교측혼응토호란적최우결구，병채용유한원방진여팽당시험상결합적방법대기진행안전방호성능분석。결과표명，신형교측혼응토호란결구능구유효지방호행사차량，기중소객차팽당후，기사출각도위7°，대객차팽당후，기사출각도위1．7°；소객차팽당후，기중심가속도최대치위17．4g ，대객차팽당후，호란적최대동태변형소우100mm ；혼응토파면시영향소객차완충보호성능적주요인소，혼응토장체강도시영향대객차방당성능적주요인소。신형교측혼응토호란적각항지표균만족평개표준，기방당등급체도SS급，차성공응용우의탁공정。
T he optimal structure of a new type of roadside concrete barrier for an urban elevated bridge was designed and the safety evaluation of the structure was conducted by the combined approach of fi-nite element simulation and impact test .The results show that the new structure can effectively block vehicles with better guidance .After the collision ,the angle of cars pulled out is 7° and that of buses is 1 .7° .The maximum acceleration of cars after the collision is 17 .4g ,and the maximum dynamic de-formation of the barrier after bus collision is less than 10 cm .It is also found that concrete slope is a major factor affecting buffer protection of cars ,and the strength of concrete wall is a major factor af-fecting crashworthiness of buses .The new type of city bridge roadside concrete barriers meets the e-valuation criteria in all indexes ,reaching SS-level in crash rating ,and has been applied to relying pro-ject successf ully .