（一）、結構特點及(ji)功能(neng)

QZ系列球型支(zhi)座(zuo)(zuo)(zuo)是由上(shang)(shang)支(zhi)座(zuo)(zuo)(zuo)板(ban)(ban)(ban)、下支(zhi)座(zuo)(zuo)(zuo)板(ban)(ban)(ban)、凸形(xing)中間(jian)板(ban)(ban)(ban)及兩塊不(bu)(bu)同形(xing)狀的(de)聚四(si)氟(fu)乙烯板(ban)(ban)(ban)組成(cheng)(cheng)。下支(zhi)座(zuo)(zuo)(zuo)板(ban)(ban)(ban)中間(jian)為一凹形(xing)球面，同凸形(xing)中間(jian)包相(xiang)對應(ying)，兩者(zhe)之(zhi)間(jian)有一弧形(xing)四(si)氟(fu)板(ban)(ban)(ban)，通過求美(mei)棉與(yu)滑動(dong)來(lai)滿足梁(liang)端的(de)轉動(dong)；上(shang)(shang)座(zuo)(zuo)(zuo)板(ban)(ban)(ban)上(shang)(shang)的(de)不(bu)(bu)銹(xiu)鋼板(ban)(ban)(ban)與(yu)中間(jian)鋼板(ban)(ban)(ban)上(shang)(shang)的(de)另一四(si)氟(fu)板(ban)(ban)(ban)組成(cheng)(cheng)第二滑動(dong)面，完成(cheng)(cheng)梁(liang)體因(yin)溫差諸多原因(yin)所(suo)產(chan)生的(de)伸縮位移。

QZ球(qiu)型支座以傳力可(ke)靠(kao)，各向轉(zhuan)動(dong)性能一(yi)致(zhi) 轉(zhuan)動(dong)靈活的特點(dian)，不僅具備盆式橡(xiang)(xiang)膠支座承載能力大(da)，水平位移大(da)等(deng)特點(dian)，而且能更好地(di)適(shi)(shi)應(ying)大(da)轉(zhuan)角的需(xu)要，適(shi)(shi)用于寬橋、曲線橋。由于承壓部件不使用橡(xiang)(xiang)膠件，不存在(zai)橡(xiang)(xiang)膠低(di)溫脆(cui)性等(deng)影(ying)響，因(yin)此特別適(shi)(shi)用于低(di)溫地(di)區。