（一）、結(jie)構特點及功能

QZ系列球型支(zhi)(zhi)座是由上支(zhi)(zhi)座板(ban)(ban)(ban)(ban)、下(xia)支(zhi)(zhi)座板(ban)(ban)(ban)(ban)、凸形(xing)中(zhong)間板(ban)(ban)(ban)(ban)及兩(liang)塊不同形(xing)狀(zhuang)的聚四(si)氟乙烯板(ban)(ban)(ban)(ban)組成(cheng)。下(xia)支(zhi)(zhi)座板(ban)(ban)(ban)(ban)中(zhong)間為一凹形(xing)球面，同凸形(xing)中(zhong)間包相對(dui)應(ying)，兩(liang)者之間有一弧形(xing)四(si)氟板(ban)(ban)(ban)(ban)，通過求美棉與滑(hua)(hua)動來滿足梁端的轉(zhuan)動；上座板(ban)(ban)(ban)(ban)上的不銹鋼板(ban)(ban)(ban)(ban)與中(zhong)間鋼板(ban)(ban)(ban)(ban)上的另一四(si)氟板(ban)(ban)(ban)(ban)組成(cheng)第二滑(hua)(hua)動面，完成(cheng)梁體因溫差諸多原(yuan)因所產生的伸縮位移。

QZ球(qiu)型支座以(yi)傳力(li)(li)可靠，各向轉(zhuan)動性能(neng)一致 轉(zhuan)動靈活的特(te)點，不僅具備盆式橡膠支座承(cheng)載能(neng)力(li)(li)大，水平位移大等(deng)特(te)點，而(er)且能(neng)更好地適應大轉(zhuan)角(jiao)的需要，適用于(yu)寬橋、曲線橋。由(you)于(yu)承(cheng)壓(ya)部(bu)件不使用橡膠件，不存在(zai)橡膠低(di)(di)溫脆(cui)性等(deng)影(ying)響(xiang)，因(yin)此特(te)別適用于(yu)低(di)(di)溫地區(qu)。