国内外主要抗震规范重力式码头结构地震作用对比

Comparison of seismic action of gravity quay structure with main seismic codes at home and abroad

重力式码头是我国分布较广、使用较多的一种码头结构形式,其依靠结构本身及其上面填料的重力来保持自身抗滑移稳定和抗倾覆稳定。对于强震区的重力式码头,除承受施工和使用过程中的一般静力作用外,还要承受地震产生的惯性力、动土压力、动水压力等作用。特别是水位较高时重力式码头墙身后的回填土处于饱和状态,强烈的地震作用会产生超孔隙水压力。因此,重力式码头的抗震设计非常重要。对比了国内外主要抗震规范重力式码头的地震作用。针对北非某拟建港区重力式码头,采用我国的《水运工程抗震设计规范》与PIANC《抗震设计指南》,对比分析地震工况下设计高水位时码头稳定性。

Gravity quay is a type of quay structure that is widely distributed and used in our country.It relies on the gravity of the structure itself and the filler on it to maintain its anti-slip stability and anti-overturning stability.For the gravity-type quay in the strong earthquake area,in addition to the general static effect during construction and use,it must also withstand the inertial force,active earth pressure,hydrodynamic pressure,etc.generated by the seismic.Especially,when the water level is high,the backfill behind the gravity quay wall is in a saturated state,and strong seismic action will generate excess pore water pressure.Therefore,the seismic design of the gravity quay is very important.This paper compares the seismic effects of gravity wharves in major domestic and foreign codes.For a gravity quay in a proposed port area in North Africa,my country s Seismic Design Code for Water Transportation Engineering and PIANC s Seismic design Guidelines for Port Structures are used to compare and analyze the stability of the quay at high water levels under earthquake conditions.