电力勘测设计
電力勘測設計
전력감측설계
ELECTRIC POWER SURVEY
2015年
z1期
311-315,326
,共6页
过路空间桁架%三维模型%截面优选%随机动力响应%可靠度
過路空間桁架%三維模型%截麵優選%隨機動力響應%可靠度
과로공간항가%삼유모형%절면우선%수궤동력향응%가고도
space frame%3D model%cross section optimization%stochastic dynamic response%reliability
热网工程的过路桁架结构通常所受荷载大、过路跨度长，对其进行受力分析一直是一个难点。鉴于此，本文建立了热网过路空间桁架的三维计算模型，在空间桁架三维建模计算的基础之上进行了截面优选。编制了结构动力响应计算程序，计算了确定性地震时程作用下的空间桁架位移响应。并据此计算了结构随机动力响应的概率密度时程分布。并在此基础上计算了结构在大震下的动力可靠度。
熱網工程的過路桁架結構通常所受荷載大、過路跨度長，對其進行受力分析一直是一箇難點。鑒于此，本文建立瞭熱網過路空間桁架的三維計算模型，在空間桁架三維建模計算的基礎之上進行瞭截麵優選。編製瞭結構動力響應計算程序，計算瞭確定性地震時程作用下的空間桁架位移響應。併據此計算瞭結構隨機動力響應的概率密度時程分佈。併在此基礎上計算瞭結構在大震下的動力可靠度。
열망공정적과로항가결구통상소수하재대、과로과도장，대기진행수력분석일직시일개난점。감우차，본문건립료열망과로공간항가적삼유계산모형，재공간항가삼유건모계산적기출지상진행료절면우선。편제료결구동력향응계산정서，계산료학정성지진시정작용하적공간항가위이향응。병거차계산료결구수궤동력향응적개솔밀도시정분포。병재차기출상계산료결구재대진하적동력가고도。
On account of the large span and high loading for the crossing street space frame, it's hard to carry out a force analysis about it. In view of this, the paper established a 3D model of the space frame, and implements cross section optimization for the construction members. Then a dynamic response calculation program is written to calculate the dynamic response under earthquakes. On the basis of this, the reliability of the space frame is talked about, and the calculation method is recommended to be further used in stochastic dynamic response of space frames.
