[　][　][橋][梁][護(hù)][欄][結(jié)][構(gòu)][參][數(shù)][的][確][定][與][其][設(shè)][計(jì)][條][件][密][切][相][關(guān)][。]橋梁護(hù)欄的設(shè)計(jì)條件[橋][梁][護(hù)][欄][的][設(shè)][計(jì)][條][件][主][要][考][慮][標(biāo)][準(zhǔn)][車][型] ([車][重])[、][碰][撞][速][度][、][碰][撞][角][度][等][因][素][，][這][些][都][是][由][道][路][條][件][和][交][通][條][件][決][定][的][。][不][同][國(guó)][家][在][選][擇][和][決][定][橋][梁][護(hù)][欄][設(shè)][計(jì)][條][件][時(shí)][，][都][要][橋梁護(hù)欄的設(shè)計(jì)條件結(jié)][合][本][國(guó)][的][道][路][交][通][實(shí)][際][情][況][。]

[　][　][從][保][護(hù)][乘][客][，][盡][可][能][減][少][損][傷][的][角][度][考][慮][，][希][望][把][橋][梁][護(hù)][欄][設(shè)][計(jì)][得][不][要][太][剛][橋梁護(hù)欄的設(shè)計(jì)條件。][橋][梁][護(hù)][欄][的][剛][柔][程][度][通][常][是][以][汽][車][碰][撞][橋][梁][護(hù)][欄][時(shí)][產(chǎn)][生][的][加][速][度][來(lái)][衡][量][的][，][一][旦][汽][車][失][控][越][出][路][外][而][與][橋][梁][護(hù)][欄][發(fā)][生][碰][撞][時(shí)][，][不][但][對(duì)][車][體][產(chǎn)][生][沖][擊][，][而][且][對(duì)][司][乘][人][員][產(chǎn)][生][沖][擊][。][當(dāng)][乘][員][遭][受][到][的][沖][擊][減]([加])[速][度][達(dá)][到][人][體][的][耐][沖][擊][闌][值][時(shí)][，][就][會(huì)][對(duì)][人][體][造][成][無(wú)][法][恢][復(fù)][的][傷][害][。][限][于][以][往][的][橋梁護(hù)欄的設(shè)計(jì)條件技][術(shù)][水][平][，][對(duì)][人][體]橋梁護(hù)欄的設(shè)計(jì)條件[的][耐][沖][擊][悶][值][的][計(jì)][算][比][較][麻][煩][，][為][此][，][人][們][針][對(duì)][橋][梁][護(hù)][欄][碰][撞][的][實(shí)][際][情][況][，][直][接][采][用][作][用][在][人][體][上][的][最][大][減]([加])[速][度][值][作][為][橋][梁][護(hù)][欄]橋梁護(hù)欄的設(shè)計(jì)條件[碰][撞][安][全][性][的][評(píng)][價(jià)][指][標(biāo)][。]