鋼結(jié)構(gòu)實腹式軸壓構(gòu)件整體穩(wěn)定性計算方法的比較研究

摘要:結(jié)合我國新修訂的鋼結(jié)構(gòu)設(shè)計規(guī)范GB 50017一2003及歐洲鋼結(jié)構(gòu)設(shè)計規(guī)范EC3，以結(jié)構(gòu)重要性等級為二級的實腹式軸壓構(gòu)件的整體穩(wěn)定性計算為例，從穩(wěn)定系數(shù)的計算和安全度設(shè)置水平兩個方面，進行了計算分析和比較，發(fā)現(xiàn)兩本規(guī)范的計算方法基本相同，在穩(wěn)定系數(shù)的取值方面，多數(shù)情況下GB 50017一2203與EC3的取值相當，而在安全度設(shè)置水平方面，GB 50017一2003則比EC3偏低10%左右.因此，今后規(guī)范修訂時，我國規(guī)范實腹式軸壓構(gòu)件整體穩(wěn)定性計算的安全度設(shè)置水平還可適當提高.
關(guān)鍵詞:實腹茱;軸壓構(gòu)件;穩(wěn)定系數(shù);安全度水平

Abstract:On t heb asiso fC hinesen ationalst andard，GB5 0017一2003( then ewc riterionf ors hort)a ndE urocode3(EC3 for short)，taking the calculation of ful-web type axially compressed members’overal stability for example.The two criterions' calculating, analysing and comparing are given from the calculation of stability coefficient and security degree. The results show that the two criterions' calculation method is same in essence. The stability coefficient
of the componentde signedo nth en ewc riterionis ap porximatedto th est abilityc oeficientof th ec omponentde signedo n
the EC3，but the correspond reliability coeficient designed on the new criterion is smaler than that of EC3 about
10%，which show that the new criterion stil need improve.So when we advise our criterion, we must enhance our country's security degree of the calculation of ful-web type axialy compressed members' overal stability properly.
Key words:full-web type; axial compression member; stability coeficient; security degree
新修訂的國家標準GB5 0017一2003(鋼結(jié)構(gòu)設(shè)計規(guī)范》(以下簡稱“新規(guī)范”)已在全國頒布實施.新規(guī)范充分反應(yīng)了我國近年來在鋼結(jié)構(gòu)研究領(lǐng)域的最新研究成果，同時有選擇地吸收和借鑒了國外相關(guān)規(guī)范的先進經(jīng)驗，如歐洲和美國的鋼結(jié)構(gòu)設(shè)計規(guī)范.本文以實腹式軸壓構(gòu)件為例，從穩(wěn)定系數(shù)和安全度設(shè)置水平兩個方面對新規(guī)范及歐洲鋼結(jié)構(gòu)計規(guī)范(EC3)中實腹式軸壓構(gòu)件整體穩(wěn)定性設(shè)計方法進行了計算分析和比較，得出了一些有意義的結(jié)論，可供有關(guān)工程技術(shù)人員參考.